diff --git a/README.md b/README.md
index 0587412..12a05b6 100644
--- a/README.md
+++ b/README.md
@@ -42,7 +42,7 @@ Key ingredients for coroutines
 
 - Insert User
 ```
-curl -X POST -H "Content-Type: application/json" -d '{"id":null,"username":"JackRabbit","email":"Jack@Rabbit.com","avatarUrl":null}'  http://localhost:8080/users/
+curl -X POST -H "Content-Type: application/json" -d '{"id":null,"userName":"JackRabbit","email":"Jack@Rabbit.com","avatarUrl":null}'  http://localhost:8080/users/
 ```
 
 - Sync avatar
@@ -72,3 +72,13 @@ gob  -c 100 -n 500 -k http://localhost:8080/blocking/users/3/sync-avatar
 
 https://stackoverflow.com/questions/35628764/completablefuture-vs-spring-transactions
 
+
+# Coroutines with blocking calls. restTemplate
+## case 1 - blocking, spring.threads.virtual.enabled:false
+```shell
+echo -n '{"id":null,"userName":"JackRabbit","email":"Jack@Rabbit.com","avatarUrl":null}' | http POST http://localhost:8080/users/with-blocking\?delay\=200 --meta
+Elapsed time: 0.443338084s
+```
+
+## case 2 - blocking, spring.threads.virtual.enabled:true
+```shell
\ No newline at end of file
diff --git a/build.gradle.kts b/build.gradle.kts
new file mode 100644
index 0000000..ffcc054
--- /dev/null
+++ b/build.gradle.kts
@@ -0,0 +1,71 @@
+import org.jetbrains.kotlin.gradle.dsl.KotlinCompile
+
+@Suppress("DSL_SCOPE_VIOLATION")
+plugins {
+    alias(libs.plugins.org.jetbrains.kotlin.plugin.spring) // org.jetbrains.kotlin:kotlin-allopen
+    alias(libs.plugins.org.jetbrains.kotlin.jvm)
+    alias(libs.plugins.org.jetbrains.kotlin.plugin.jpa) // all open for Entity classes
+    alias(libs.plugins.org.springframework.boot)
+    alias(libs.plugins.io.spring.dependency.management)
+    alias(libs.plugins.org.jetbrains.kotlinx.kover)
+    alias(libs.plugins.com.linecorp.build.recipe.plugin)
+//    alias(libs.plugins.org.jlleitschuh.gradle.ktlint)
+}
+
+repositories {
+    mavenLocal()
+    maven {
+        url = uri("https://repo.spring.io/snapshot")
+    }
+
+    maven {
+        url = uri("https://repo.spring.io/milestone")
+    }
+
+    maven {
+        url = uri("https://repo.maven.apache.org/maven2/")
+    }
+}
+
+dependencies {
+    implementation(libs.org.springframework.boot.spring.boot.starter.data.jpa)
+    implementation(libs.org.springframework.boot.spring.boot.starter.data.r2dbc)
+    implementation(libs.org.springframework.boot.spring.boot.starter.webflux)
+    implementation(libs.com.fasterxml.jackson.module.jackson.module.kotlin)
+    implementation(libs.io.projectreactor.kotlin.reactor.kotlin.extensions)
+    implementation(libs.org.jetbrains.kotlin.kotlin.reflect)
+    implementation(libs.org.jetbrains.kotlinx.kotlinx.coroutines.reactor)
+
+    implementation(libs.io.r2dbc.r2dbc.h2)
+    implementation(libs.io.r2dbc.r2dbc.spi)
+    implementation(libs.org.jetbrains.kotlinx.kotlinx.coroutines.slf4j)
+
+    testImplementation(libs.io.projectreactor.reactor.test)
+    testImplementation(libs.io.kotlintest.kotlintest.assertions)
+    testImplementation(libs.org.springframework.boot.spring.boot.starter.test)
+    testImplementation(libs.org.junit.jupiter.junit.jupiter.api)
+    testImplementation(libs.org.junit.jupiter.junit.jupiter.engine)
+    testImplementation(libs.org.jetbrains.kotlin.kotlin.test.junit5)
+}
+
+group = "org.up"
+version = "1.0.0"
+description = "spring-boot-kotlin"
+java.sourceCompatibility = JavaVersion.VERSION_21
+
+kotlin {
+    jvmToolchain {
+        languageVersion.set(JavaLanguageVersion.of(21))
+    }
+}
+
+tasks {
+    compileKotlin {
+        kotlinOptions {
+            freeCompilerArgs = listOf("-Xjsr305=strict")
+        }
+    }
+    test {
+        useJUnitPlatform()
+    }
+}
diff --git a/gradle/libs.versions.toml b/gradle/libs.versions.toml
new file mode 100644
index 0000000..cb32b5c
--- /dev/null
+++ b/gradle/libs.versions.toml
@@ -0,0 +1,64 @@
+# This file was generated by the Gradle 'init' task.
+# https://docs.gradle.org/current/userguide/platforms.html#sub::toml-dependencies-format
+
+[plugins]
+
+org-springframework-boot = { id = "org.springframework.boot", version.ref = "spring-boot" }
+
+io-spring-dependency-management = { id = "io.spring.dependency-management", version = "1.1.4" }
+
+org-jetbrains-kotlin-jvm = { id = "org.jetbrains.kotlin.jvm", version.ref = "kotlin" }
+
+org-jetbrains-kotlin-plugin-spring = { id = "org.jetbrains.kotlin.plugin.spring", version.ref = "kotlin" }
+org-jetbrains-kotlin-plugin-jpa = { id = "org.jetbrains.kotlin.plugin.jpa", version.ref = "kotlin" }
+
+com-linecorp-build-recipe-plugin = { id = "com.linecorp.build-recipe-plugin", version = "1.1.1" }
+
+org-jetbrains-kotlinx-kover = { id = "org.jetbrains.kotlinx.kover", version = "0.7.5" }
+
+org-jlleitschuh-gradle-ktlint = { id = "org.jlleitschuh.gradle.ktlint", version = "12.1.0" }
+
+[versions]
+
+com-fasterxml-jackson-module-jackson-module-kotlin = "2.16.1"
+io-kotlintest-kotlintest-assertions = "3.4.2"
+io-projectreactor-reactor-test = "3.6.2"
+io-r2dbc-r2dbc-h2 = "1.0.0.RELEASE"
+io-r2dbc-r2dbc-spi = "1.0.0.RELEASE"
+
+io-projectreactor-kotlin-reactor-kotlin-extensions = "1.2.2"
+
+spring-boot = "3.2.2"
+
+kotlin = "1.9.22"
+
+org-springframework-boot = { id = "org.springframework.boot", version.ref = "spring-boot" }
+
+io-spring-dependency-management = { id = "io.spring.dependency-management", version = "1.1.0" }
+
+org-jetbrains-kotlin-jvm = { id = "org.jetbrains.kotlin.jvm", version.ref = "kotlin" }
+
+org-jetbrains-kotlin-plugin-spring = { id = "org.jetbrains.kotlin.plugin.spring", version.ref = "kotlin" }
+
+[libraries]
+
+com-fasterxml-jackson-module-jackson-module-kotlin = { module = "com.fasterxml.jackson.module:jackson-module-kotlin", version.ref = "com-fasterxml-jackson-module-jackson-module-kotlin" }
+io-kotlintest-kotlintest-assertions = { module = "io.kotlintest:kotlintest-assertions", version.ref = "io-kotlintest-kotlintest-assertions" }
+io-projectreactor-reactor-test = { module = "io.projectreactor:reactor-test", version.ref = "io-projectreactor-reactor-test" }
+io-r2dbc-r2dbc-h2 = { module = "io.r2dbc:r2dbc-h2", version.ref = "io-r2dbc-r2dbc-h2" }
+io-r2dbc-r2dbc-spi = { module = "io.r2dbc:r2dbc-spi", version.ref = "io-r2dbc-r2dbc-spi" }
+org-jetbrains-kotlin-kotlin-reflect = { module = "org.jetbrains.kotlin:kotlin-reflect" }
+org-jetbrains-kotlin-kotlin-script-runtime = { module = "org.jetbrains.kotlin:kotlin-script-runtime" }
+org-jetbrains-kotlin-kotlin-test-junit5 = { module = "org.jetbrains.kotlin:kotlin-test-junit5" }
+org-jetbrains-kotlinx-kotlinx-coroutines-core = { module = "org.jetbrains.kotlinx:kotlinx-coroutines-core" }
+org-jetbrains-kotlinx-kotlinx-coroutines-jdk8 = { module = "org.jetbrains.kotlinx:kotlinx-coroutines-jdk8" }
+org-jetbrains-kotlinx-kotlinx-coroutines-reactor = { module = "org.jetbrains.kotlinx:kotlinx-coroutines-reactor" }
+org-jetbrains-kotlinx-kotlinx-coroutines-slf4j = { module = "org.jetbrains.kotlinx:kotlinx-coroutines-slf4j" }
+
+org-junit-jupiter-junit-jupiter-api = { module = "org.junit.jupiter:junit-jupiter-api" }
+org-junit-jupiter-junit-jupiter-engine = { module = "org.junit.jupiter:junit-jupiter-engine" }
+org-springframework-boot-spring-boot-starter-data-jpa = { module = "org.springframework.boot:spring-boot-starter-data-jpa" }
+org-springframework-boot-spring-boot-starter-data-r2dbc = { module = "org.springframework.boot:spring-boot-starter-data-r2dbc" }
+org-springframework-boot-spring-boot-starter-test = { module = "org.springframework.boot:spring-boot-starter-test" }
+org-springframework-boot-spring-boot-starter-webflux = { module = "org.springframework.boot:spring-boot-starter-webflux" }
+io-projectreactor-kotlin-reactor-kotlin-extensions = { module = "io.projectreactor.kotlin:reactor-kotlin-extensions", version.ref = "io-projectreactor-kotlin-reactor-kotlin-extensions" }
\ No newline at end of file
diff --git a/gradlew b/gradlew
new file mode 100755
index 0000000..1aa94a4
--- /dev/null
+++ b/gradlew
@@ -0,0 +1,249 @@
+#!/bin/sh
+
+#
+# Copyright © 2015-2021 the original authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      https://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+
+##############################################################################
+#
+#   Gradle start up script for POSIX generated by Gradle.
+#
+#   Important for running:
+#
+#   (1) You need a POSIX-compliant shell to run this script. If your /bin/sh is
+#       noncompliant, but you have some other compliant shell such as ksh or
+#       bash, then to run this script, type that shell name before the whole
+#       command line, like:
+#
+#           ksh Gradle
+#
+#       Busybox and similar reduced shells will NOT work, because this script
+#       requires all of these POSIX shell features:
+#         * functions;
+#         * expansions «$var», «${var}», «${var:-default}», «${var+SET}»,
+#           «${var#prefix}», «${var%suffix}», and «$( cmd )»;
+#         * compound commands having a testable exit status, especially «case»;
+#         * various built-in commands including «command», «set», and «ulimit».
+#
+#   Important for patching:
+#
+#   (2) This script targets any POSIX shell, so it avoids extensions provided
+#       by Bash, Ksh, etc; in particular arrays are avoided.
+#
+#       The "traditional" practice of packing multiple parameters into a
+#       space-separated string is a well documented source of bugs and security
+#       problems, so this is (mostly) avoided, by progressively accumulating
+#       options in "$@", and eventually passing that to Java.
+#
+#       Where the inherited environment variables (DEFAULT_JVM_OPTS, JAVA_OPTS,
+#       and GRADLE_OPTS) rely on word-splitting, this is performed explicitly;
+#       see the in-line comments for details.
+#
+#       There are tweaks for specific operating systems such as AIX, CygWin,
+#       Darwin, MinGW, and NonStop.
+#
+#   (3) This script is generated from the Groovy template
+#       https://github.com/gradle/gradle/blob/HEAD/subprojects/plugins/src/main/resources/org/gradle/api/internal/plugins/unixStartScript.txt
+#       within the Gradle project.
+#
+#       You can find Gradle at https://github.com/gradle/gradle/.
+#
+##############################################################################
+
+# Attempt to set APP_HOME
+
+# Resolve links: $0 may be a link
+app_path=$0
+
+# Need this for daisy-chained symlinks.
+while
+    APP_HOME=${app_path%"${app_path##*/}"}  # leaves a trailing /; empty if no leading path
+    [ -h "$app_path" ]
+do
+    ls=$( ls -ld "$app_path" )
+    link=${ls#*' -> '}
+    case $link in             #(
+      /*)   app_path=$link ;; #(
+      *)    app_path=$APP_HOME$link ;;
+    esac
+done
+
+# This is normally unused
+# shellcheck disable=SC2034
+APP_BASE_NAME=${0##*/}
+# Discard cd standard output in case $CDPATH is set (https://github.com/gradle/gradle/issues/25036)
+APP_HOME=$( cd "${APP_HOME:-./}" > /dev/null && pwd -P ) || exit
+
+# Use the maximum available, or set MAX_FD != -1 to use that value.
+MAX_FD=maximum
+
+warn () {
+    echo "$*"
+} >&2
+
+die () {
+    echo
+    echo "$*"
+    echo
+    exit 1
+} >&2
+
+# OS specific support (must be 'true' or 'false').
+cygwin=false
+msys=false
+darwin=false
+nonstop=false
+case "$( uname )" in                #(
+  CYGWIN* )         cygwin=true  ;; #(
+  Darwin* )         darwin=true  ;; #(
+  MSYS* | MINGW* )  msys=true    ;; #(
+  NONSTOP* )        nonstop=true ;;
+esac
+
+CLASSPATH=$APP_HOME/gradle/wrapper/gradle-wrapper.jar
+
+
+# Determine the Java command to use to start the JVM.
+if [ -n "$JAVA_HOME" ] ; then
+    if [ -x "$JAVA_HOME/jre/sh/java" ] ; then
+        # IBM's JDK on AIX uses strange locations for the executables
+        JAVACMD=$JAVA_HOME/jre/sh/java
+    else
+        JAVACMD=$JAVA_HOME/bin/java
+    fi
+    if [ ! -x "$JAVACMD" ] ; then
+        die "ERROR: JAVA_HOME is set to an invalid directory: $JAVA_HOME
+
+Please set the JAVA_HOME variable in your environment to match the
+location of your Java installation."
+    fi
+else
+    JAVACMD=java
+    if ! command -v java >/dev/null 2>&1
+    then
+        die "ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
+
+Please set the JAVA_HOME variable in your environment to match the
+location of your Java installation."
+    fi
+fi
+
+# Increase the maximum file descriptors if we can.
+if ! "$cygwin" && ! "$darwin" && ! "$nonstop" ; then
+    case $MAX_FD in #(
+      max*)
+        # In POSIX sh, ulimit -H is undefined. That's why the result is checked to see if it worked.
+        # shellcheck disable=SC2039,SC3045
+        MAX_FD=$( ulimit -H -n ) ||
+            warn "Could not query maximum file descriptor limit"
+    esac
+    case $MAX_FD in  #(
+      '' | soft) :;; #(
+      *)
+        # In POSIX sh, ulimit -n is undefined. That's why the result is checked to see if it worked.
+        # shellcheck disable=SC2039,SC3045
+        ulimit -n "$MAX_FD" ||
+            warn "Could not set maximum file descriptor limit to $MAX_FD"
+    esac
+fi
+
+# Collect all arguments for the java command, stacking in reverse order:
+#   * args from the command line
+#   * the main class name
+#   * -classpath
+#   * -D...appname settings
+#   * --module-path (only if needed)
+#   * DEFAULT_JVM_OPTS, JAVA_OPTS, and GRADLE_OPTS environment variables.
+
+# For Cygwin or MSYS, switch paths to Windows format before running java
+if "$cygwin" || "$msys" ; then
+    APP_HOME=$( cygpath --path --mixed "$APP_HOME" )
+    CLASSPATH=$( cygpath --path --mixed "$CLASSPATH" )
+
+    JAVACMD=$( cygpath --unix "$JAVACMD" )
+
+    # Now convert the arguments - kludge to limit ourselves to /bin/sh
+    for arg do
+        if
+            case $arg in                                #(
+              -*)   false ;;                            # don't mess with options #(
+              /?*)  t=${arg#/} t=/${t%%/*}              # looks like a POSIX filepath
+                    [ -e "$t" ] ;;                      #(
+              *)    false ;;
+            esac
+        then
+            arg=$( cygpath --path --ignore --mixed "$arg" )
+        fi
+        # Roll the args list around exactly as many times as the number of
+        # args, so each arg winds up back in the position where it started, but
+        # possibly modified.
+        #
+        # NB: a `for` loop captures its iteration list before it begins, so
+        # changing the positional parameters here affects neither the number of
+        # iterations, nor the values presented in `arg`.
+        shift                   # remove old arg
+        set -- "$@" "$arg"      # push replacement arg
+    done
+fi
+
+
+# Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
+DEFAULT_JVM_OPTS='"-Xmx64m" "-Xms64m"'
+
+# Collect all arguments for the java command:
+#   * DEFAULT_JVM_OPTS, JAVA_OPTS, JAVA_OPTS, and optsEnvironmentVar are not allowed to contain shell fragments,
+#     and any embedded shellness will be escaped.
+#   * For example: A user cannot expect ${Hostname} to be expanded, as it is an environment variable and will be
+#     treated as '${Hostname}' itself on the command line.
+
+set -- \
+        "-Dorg.gradle.appname=$APP_BASE_NAME" \
+        -classpath "$CLASSPATH" \
+        org.gradle.wrapper.GradleWrapperMain \
+        "$@"
+
+# Stop when "xargs" is not available.
+if ! command -v xargs >/dev/null 2>&1
+then
+    die "xargs is not available"
+fi
+
+# Use "xargs" to parse quoted args.
+#
+# With -n1 it outputs one arg per line, with the quotes and backslashes removed.
+#
+# In Bash we could simply go:
+#
+#   readarray ARGS < <( xargs -n1 <<<"$var" ) &&
+#   set -- "${ARGS[@]}" "$@"
+#
+# but POSIX shell has neither arrays nor command substitution, so instead we
+# post-process each arg (as a line of input to sed) to backslash-escape any
+# character that might be a shell metacharacter, then use eval to reverse
+# that process (while maintaining the separation between arguments), and wrap
+# the whole thing up as a single "set" statement.
+#
+# This will of course break if any of these variables contains a newline or
+# an unmatched quote.
+#
+
+eval "set -- $(
+        printf '%s\n' "$DEFAULT_JVM_OPTS $JAVA_OPTS $GRADLE_OPTS" |
+        xargs -n1 |
+        sed ' s~[^-[:alnum:]+,./:=@_]~\\&~g; ' |
+        tr '\n' ' '
+    )" '"$@"'
+
+exec "$JAVACMD" "$@"
diff --git a/gradlew.bat b/gradlew.bat
new file mode 100644
index 0000000..25da30d
--- /dev/null
+++ b/gradlew.bat
@@ -0,0 +1,92 @@
+@rem
+@rem Copyright 2015 the original author or authors.
+@rem
+@rem Licensed under the Apache License, Version 2.0 (the "License");
+@rem you may not use this file except in compliance with the License.
+@rem You may obtain a copy of the License at
+@rem
+@rem      https://www.apache.org/licenses/LICENSE-2.0
+@rem
+@rem Unless required by applicable law or agreed to in writing, software
+@rem distributed under the License is distributed on an "AS IS" BASIS,
+@rem WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+@rem See the License for the specific language governing permissions and
+@rem limitations under the License.
+@rem
+
+@if "%DEBUG%"=="" @echo off
+@rem ##########################################################################
+@rem
+@rem  Gradle startup script for Windows
+@rem
+@rem ##########################################################################
+
+@rem Set local scope for the variables with windows NT shell
+if "%OS%"=="Windows_NT" setlocal
+
+set DIRNAME=%~dp0
+if "%DIRNAME%"=="" set DIRNAME=.
+@rem This is normally unused
+set APP_BASE_NAME=%~n0
+set APP_HOME=%DIRNAME%
+
+@rem Resolve any "." and ".." in APP_HOME to make it shorter.
+for %%i in ("%APP_HOME%") do set APP_HOME=%%~fi
+
+@rem Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
+set DEFAULT_JVM_OPTS="-Xmx64m" "-Xms64m"
+
+@rem Find java.exe
+if defined JAVA_HOME goto findJavaFromJavaHome
+
+set JAVA_EXE=java.exe
+%JAVA_EXE% -version >NUL 2>&1
+if %ERRORLEVEL% equ 0 goto execute
+
+echo. 1>&2
+echo ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH. 1>&2
+echo. 1>&2
+echo Please set the JAVA_HOME variable in your environment to match the 1>&2
+echo location of your Java installation. 1>&2
+
+goto fail
+
+:findJavaFromJavaHome
+set JAVA_HOME=%JAVA_HOME:"=%
+set JAVA_EXE=%JAVA_HOME%/bin/java.exe
+
+if exist "%JAVA_EXE%" goto execute
+
+echo. 1>&2
+echo ERROR: JAVA_HOME is set to an invalid directory: %JAVA_HOME% 1>&2
+echo. 1>&2
+echo Please set the JAVA_HOME variable in your environment to match the 1>&2
+echo location of your Java installation. 1>&2
+
+goto fail
+
+:execute
+@rem Setup the command line
+
+set CLASSPATH=%APP_HOME%\gradle\wrapper\gradle-wrapper.jar
+
+
+@rem Execute Gradle
+"%JAVA_EXE%" %DEFAULT_JVM_OPTS% %JAVA_OPTS% %GRADLE_OPTS% "-Dorg.gradle.appname=%APP_BASE_NAME%" -classpath "%CLASSPATH%" org.gradle.wrapper.GradleWrapperMain %*
+
+:end
+@rem End local scope for the variables with windows NT shell
+if %ERRORLEVEL% equ 0 goto mainEnd
+
+:fail
+rem Set variable GRADLE_EXIT_CONSOLE if you need the _script_ return code instead of
+rem the _cmd.exe /c_ return code!
+set EXIT_CODE=%ERRORLEVEL%
+if %EXIT_CODE% equ 0 set EXIT_CODE=1
+if not ""=="%GRADLE_EXIT_CONSOLE%" exit %EXIT_CODE%
+exit /b %EXIT_CODE%
+
+:mainEnd
+if "%OS%"=="Windows_NT" endlocal
+
+:omega
diff --git a/node-server/Dockerfile b/node-server/Dockerfile
index 1222864..bc68ba0 100644
--- a/node-server/Dockerfile
+++ b/node-server/Dockerfile
@@ -1,4 +1,4 @@
-FROM node:7
+FROM node:latest
 WORKDIR /app
 RUN apt-get update -yq \
     && apt-get install tcpdump -yq 
diff --git a/node-server/package-lock.json b/node-server/package-lock.json
index ae5cac0..60c182c 100644
--- a/node-server/package-lock.json
+++ b/node-server/package-lock.json
@@ -1,373 +1,665 @@
 {
   "name": "echo-server",
   "version": "1.0.0",
-  "lockfileVersion": 1,
+  "lockfileVersion": 3,
   "requires": true,
-  "dependencies": {
-    "accepts": {
-      "version": "1.3.5",
-      "resolved": "https://registry.npmjs.org/accepts/-/accepts-1.3.5.tgz",
-      "integrity": "sha1-63d99gEXI6OxTopywIBcjoZ0a9I=",
-      "requires": {
-        "mime-types": "2.1.20",
-        "negotiator": "0.6.1"
+  "packages": {
+    "": {
+      "name": "echo-server",
+      "version": "1.0.0",
+      "license": "ISC",
+      "dependencies": {
+        "express": "^4.18.2"
+      }
+    },
+    "node_modules/accepts": {
+      "version": "1.3.8",
+      "resolved": "https://registry.npmjs.org/repository/npm-group/accepts/-/accepts-1.3.8.tgz",
+      "integrity": "sha512-PYAthTa2m2VKxuvSD3DPC/Gy+U+sOA1LAuT8mkmRuvw+NACSaeXEQ+NHcVF7rONl6qcaxV3Uuemwawk+7+SJLw==",
+      "license": "MIT",
+      "dependencies": {
+        "mime-types": "~2.1.34",
+        "negotiator": "0.6.3"
+      },
+      "engines": {
+        "node": ">= 0.6"
       }
     },
-    "array-flatten": {
+    "node_modules/array-flatten": {
       "version": "1.1.1",
       "resolved": "https://registry.npmjs.org/array-flatten/-/array-flatten-1.1.1.tgz",
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+    "node_modules/statuses": {
+      "version": "2.0.1",
+      "resolved": "https://registry.npmjs.org/repository/npm-group/statuses/-/statuses-2.0.1.tgz",
+      "integrity": "sha512-RwNA9Z/7PrK06rYLIzFMlaF+l73iwpzsqRIFgbMLbTcLD6cOao82TaWefPXQvB2fOC4AjuYSEndS7N/mTCbkdQ==",
+      "license": "MIT",
+      "engines": {
+        "node": ">= 0.8"
+      }
+    },
+    "node_modules/toidentifier": {
+      "version": "1.0.1",
+      "resolved": "https://registry.npmjs.org/repository/npm-group/toidentifier/-/toidentifier-1.0.1.tgz",
+      "integrity": "sha512-o5sSPKEkg/DIQNmH43V0/uerLrpzVedkUh8tGNvaeXpfpuwjKenlSox/2O/BTlZUtEe+JG7s5YhEz608PlAHRA==",
+      "license": "MIT",
+      "engines": {
+        "node": ">=0.6"
+      }
+    },
+    "node_modules/type-is": {
+      "version": "1.6.18",
+      "resolved": "https://registry.npmjs.org/repository/npm-group/type-is/-/type-is-1.6.18.tgz",
+      "integrity": "sha512-TkRKr9sUTxEH8MdfuCSP7VizJyzRNMjj2J2do2Jr3Kym598JVdEksuzPQCnlFPW4ky9Q+iA+ma9BGm06XQBy8g==",
+      "license": "MIT",
+      "dependencies": {
         "media-typer": "0.3.0",
-        "mime-types": "2.1.20"
+        "mime-types": "~2.1.24"
+      },
+      "engines": {
+        "node": ">= 0.6"
       }
     },
-    "unpipe": {
+    "node_modules/unpipe": {
       "version": "1.0.0",
-      "resolved": "https://registry.npmjs.org/unpipe/-/unpipe-1.0.0.tgz",
-      "integrity": "sha1-sr9O6FFKrmFltIF4KdIbLvSZBOw="
+      "resolved": "https://registry.npmjs.org/repository/npm-group/unpipe/-/unpipe-1.0.0.tgz",
+      "integrity": "sha512-pjy2bYhSsufwWlKwPc+l3cN7+wuJlK6uz0YdJEOlQDbl6jo/YlPi4mb8agUkVC8BF7V8NuzeyPNqRksA3hztKQ==",
+      "license": "MIT",
+      "engines": {
+        "node": ">= 0.8"
+      }
     },
-    "utils-merge": {
+    "node_modules/utils-merge": {
       "version": "1.0.1",
       "resolved": "https://registry.npmjs.org/utils-merge/-/utils-merge-1.0.1.tgz",
-      "integrity": "sha1-n5VxD1CiZ5R7LMwSR0HBAoQn5xM="
+      "integrity": "sha1-n5VxD1CiZ5R7LMwSR0HBAoQn5xM=",
+      "license": "MIT",
+      "engines": {
+        "node": ">= 0.4.0"
+      }
     },
-    "vary": {
+    "node_modules/vary": {
       "version": "1.1.2",
       "resolved": "https://registry.npmjs.org/vary/-/vary-1.1.2.tgz",
-      "integrity": "sha1-IpnwLG3tMNSllhsLn3RSShj2NPw="
+      "integrity": "sha1-IpnwLG3tMNSllhsLn3RSShj2NPw=",
+      "license": "MIT",
+      "engines": {
+        "node": ">= 0.8"
+      }
     }
   }
 }
diff --git a/node-server/package.json b/node-server/package.json
index 0888a40..5fefe7d 100644
--- a/node-server/package.json
+++ b/node-server/package.json
@@ -9,6 +9,6 @@
   "author": "",
   "license": "ISC",
   "dependencies": {
-    "express": "^4.16.3"
+    "express": "^4.18.2"
   }
 }
diff --git a/settings.gradle.kts b/settings.gradle.kts
new file mode 100644
index 0000000..e0d958a
--- /dev/null
+++ b/settings.gradle.kts
@@ -0,0 +1,38 @@
+/*
+ * This file was generated by the Gradle 'init' task.
+ *
+ * This project uses @Incubating APIs which are subject to change.
+ */
+import de.fayard.refreshVersions.core.StabilityLevel
+
+
+pluginManagement {
+    repositories {
+        maven { url = uri("https://repo.spring.io/milestone") }
+        maven { url = uri("https://repo.spring.io/snapshot") }
+        gradlePluginPortal()
+    }
+
+    plugins {
+        // See https://jmfayard.github.io/refreshVersions
+        id("de.fayard.refreshVersions").version("0.60.5")
+    }
+}
+
+plugins {
+    id("de.fayard.refreshVersions")
+}
+
+refreshVersions {
+    // ignore all non-stable releases
+    rejectVersionIf {
+        candidate.stabilityLevel != StabilityLevel.Stable
+    }
+
+    // Or maybe you want to see alpha versions if you are already using an alpha version, otherwise you want to see only stable versions
+    rejectVersionIf {
+        candidate.stabilityLevel.isLessStableThan(current.stabilityLevel)
+    }
+}
+
+rootProject.name = "spring-boot-kotlin"
diff --git a/src/main/kotlin/org/up/SpringApplication.kt b/src/main/kotlin/org/up/SpringApplication.kt
index 8115879..9f93ad9 100644
--- a/src/main/kotlin/org/up/SpringApplication.kt
+++ b/src/main/kotlin/org/up/SpringApplication.kt
@@ -2,12 +2,11 @@ package org.up
 
 import org.springframework.boot.SpringApplication.run
 import org.springframework.boot.autoconfigure.SpringBootApplication
-import org.springframework.boot.autoconfigure.domain.EntityScan
 import org.springframework.data.jpa.repository.config.EnableJpaRepositories
 import org.springframework.data.r2dbc.repository.config.EnableR2dbcRepositories
 
 @SpringBootApplication
-@EnableR2dbcRepositories(value = arrayOf("org.up.coroutines", "org.up.reactor"))
+@EnableR2dbcRepositories(value = ["org.up.coroutines", "org.up.reactor"])
 @EnableJpaRepositories("org.up.blocking")
 class SpringApplication
 
diff --git a/src/main/kotlin/org/up/blocking/BlockingConfig.kt b/src/main/kotlin/org/up/blocking/BlockingConfig.kt
index e28d7cb..c7e431d 100644
--- a/src/main/kotlin/org/up/blocking/BlockingConfig.kt
+++ b/src/main/kotlin/org/up/blocking/BlockingConfig.kt
@@ -1,24 +1,20 @@
 package org.up.blocking
 
+import jakarta.persistence.EntityManagerFactory
 import org.springframework.context.annotation.Bean
 import org.springframework.context.annotation.Configuration
 import org.springframework.context.annotation.Primary
 import org.springframework.core.env.Environment
 import org.springframework.jdbc.datasource.DriverManagerDataSource
-import org.springframework.orm.hibernate5.HibernateExceptionTranslator
 import org.springframework.orm.jpa.JpaTransactionManager
 import org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean
 import org.springframework.orm.jpa.vendor.HibernateJpaVendorAdapter
 import org.springframework.transaction.PlatformTransactionManager
-import org.springframework.transaction.annotation.EnableTransactionManagement
 import java.util.*
-import javax.persistence.EntityManagerFactory
 import javax.sql.DataSource
 
-
 @Configuration
 class BlockingConfig {
-
     private val PROPERTY_NAME_DATABASE_DRIVER = "spring.datasource.driverClassName"
     private val PROPERTY_NAME_DATABASE_URL = "spring.datasource.url"
     private val PROPERTY_NAME_DATABASE_USERNAME = "spring.datasource.username"
@@ -26,32 +22,35 @@ class BlockingConfig {
     private val PROPERTY_NAME_DATABASE_PLATFORM = "spring.jpa.database-platform"
 
     @Bean
-    fun entityManagerFactory(dataSource: DataSource, additionalProperties: Properties): LocalContainerEntityManagerFactoryBean =
-            LocalContainerEntityManagerFactoryBean().apply {
-                this.dataSource = dataSource
-                setPackagesToScan("org.up.blocking")
-                jpaVendorAdapter = HibernateJpaVendorAdapter()
-                setJpaProperties(additionalProperties)
-            }
+    fun entityManagerFactory(
+        dataSource: DataSource,
+        additionalProperties: Properties,
+    ): LocalContainerEntityManagerFactoryBean =
+        LocalContainerEntityManagerFactoryBean().apply {
+            this.dataSource = dataSource
+            setPackagesToScan("org.up.blocking")
+            jpaVendorAdapter = HibernateJpaVendorAdapter()
+            setJpaProperties(additionalProperties)
+        }
 
     @Bean
-    fun additionalProperties(environment: Environment): Properties = Properties().apply {
-        setProperty("hibernate.dialect", environment.getRequiredProperty(PROPERTY_NAME_DATABASE_PLATFORM))
-    }
-
+    fun additionalProperties(environment: Environment): Properties =
+        Properties().apply {
+            setProperty("hibernate.dialect", environment.getRequiredProperty(PROPERTY_NAME_DATABASE_PLATFORM))
+        }
 
     @Bean
     fun dataSource(environment: Environment): DataSource =
-            DriverManagerDataSource().apply {
-                setDriverClassName(environment.getRequiredProperty(PROPERTY_NAME_DATABASE_DRIVER))
-                url = environment.getRequiredProperty(PROPERTY_NAME_DATABASE_URL)
-                username = environment.getRequiredProperty(PROPERTY_NAME_DATABASE_USERNAME)
-                password = environment.getRequiredProperty(PROPERTY_NAME_DATABASE_PASSWORD)
-            }
+        DriverManagerDataSource().apply {
+            setDriverClassName(environment.getRequiredProperty(PROPERTY_NAME_DATABASE_DRIVER))
+            url = environment.getRequiredProperty(PROPERTY_NAME_DATABASE_URL)
+            username = environment.getRequiredProperty(PROPERTY_NAME_DATABASE_USERNAME)
+            password = environment.getRequiredProperty(PROPERTY_NAME_DATABASE_PASSWORD)
+        }
 
     @Bean
     @Primary
     fun transactionManager(entityManagerFactory: EntityManagerFactory): PlatformTransactionManager {
         return JpaTransactionManager(entityManagerFactory)
     }
-}
\ No newline at end of file
+}
diff --git a/src/main/kotlin/org/up/blocking/controller/BlockingUserController.kt b/src/main/kotlin/org/up/blocking/controller/BlockingUserController.kt
index 417c6d0..4b72428 100644
--- a/src/main/kotlin/org/up/blocking/controller/BlockingUserController.kt
+++ b/src/main/kotlin/org/up/blocking/controller/BlockingUserController.kt
@@ -1,52 +1,56 @@
 package org.up.blocking.controller
 
-import org.slf4j.MDC
+import jakarta.transaction.Transactional
 import org.springframework.web.bind.annotation.*
 import org.up.blocking.model.UserJpa
 import org.up.blocking.repository.BlockingAvatarService
 import org.up.blocking.repository.BlockingEnrollmentService
 import org.up.blocking.repository.BlockingUserDao
-import org.up.coroutines.config.MdcWebFilter
 import org.up.utils.supplyAsync
 import org.up.utils.toNullable
 import java.util.concurrent.CompletableFuture
-import javax.transaction.Transactional
 
 @RestController
 class BlockingUserController(
-        private val blockingUserDao: BlockingUserDao,
-        private val blockingAvatarService: BlockingAvatarService,
-        private val blockingEnrollmentService: BlockingEnrollmentService
+    private val blockingUserDao: BlockingUserDao,
+    private val blockingAvatarService: BlockingAvatarService,
+    private val blockingEnrollmentService: BlockingEnrollmentService,
 ) {
-
-
     @GetMapping("/blocking/users/{user-id}")
     @ResponseBody
-    fun getUser(@PathVariable("user-id") id: Long = 0): UserJpa? =
-            blockingUserDao.findById(id).toNullable()
+    fun getUser(
+        @PathVariable("user-id") id: Long = 0,
+    ): UserJpa? = blockingUserDao.findById(id).toNullable()
 
     @GetMapping("/blocking/users")
     @ResponseBody
-    fun getUsers(): List<UserJpa> =
-            blockingUserDao.findAll()
-
+    fun getUsers(): List<UserJpa> = blockingUserDao.findAll()
 
     @PostMapping("/blocking/users")
     @ResponseBody
     @Transactional
-    fun storeUser(@RequestBody user: UserJpa, @RequestParam(required = false) delay:Long? = null): UserJpa {
+    fun storeUser(
+        @RequestBody user: UserJpa,
+        @RequestParam(required = false) delay: Long? = null,
+    ): UserJpa {
         val emailVerified = blockingEnrollmentService.verifyEmail(user.email, delay)
         val avatarUrl = user.avatarUrl ?: blockingAvatarService.randomAvatar(delay).url
         return blockingUserDao.save(user.copy(avatarUrl = avatarUrl, emailVerified = emailVerified))
     }
 
-
     @PostMapping("/futures/users")
     @ResponseBody
-    fun storeUserFutures(@RequestBody user: UserJpa, @RequestParam(required = false) delay:Long? = null): UserJpa {
+    fun storeUserFutures(
+        @RequestBody user: UserJpa,
+        @RequestParam(required = false) delay: Long? = null,
+    ): UserJpa {
         val emailVerifiedF = CompletableFuture.supplyAsync { blockingEnrollmentService.verifyEmail(user.email, delay) }
-        val avatuarUrl = if (user.avatarUrl != null) CompletableFuture.completedFuture(user.avatarUrl) else
-            CompletableFuture.supplyAsync { blockingAvatarService.randomAvatar(delay).url }
+        val avatuarUrl =
+            if (user.avatarUrl != null) {
+                CompletableFuture.completedFuture(user.avatarUrl)
+            } else {
+                CompletableFuture.supplyAsync { blockingAvatarService.randomAvatar(delay).url }
+            }
         val combinedF = avatuarUrl.thenCombineAsync(emailVerifiedF) { avatuarUrl, emailVerified -> avatuarUrl to emailVerified }
         val (avatarUrl, emailVerified) = combinedF.join()
         return blockingUserDao.save(user.copy(avatarUrl = avatarUrl, emailVerified = emailVerified))
@@ -54,21 +58,26 @@ class BlockingUserController(
 
     @PostMapping("/futures-mdc/users")
     @ResponseBody
-    fun storeUserFuturesMdc(@RequestBody user: UserJpa, @RequestParam(required = false) delay:Long? = null): UserJpa {
+    fun storeUserFuturesMdc(
+        @RequestBody user: UserJpa,
+        @RequestParam(required = false) delay: Long? = null,
+    ): UserJpa {
         val avatarUrlF = supplyAsync { blockingAvatarService.randomAvatar(delay).url }
-        val combinedF = supplyAsync { blockingEnrollmentService.verifyEmail(user.email, delay) }
+        val combinedF =
+            supplyAsync { blockingEnrollmentService.verifyEmail(user.email, delay) }
                 .thenCombineAsync(avatarUrlF) { emailVerified, avatarUrl -> avatarUrl to emailVerified }
         val (avatarUrl, emailVerified) = combinedF.join()
         return blockingUserDao.save(user.copy(avatarUrl = avatarUrl, emailVerified = emailVerified))
     }
 
-
     @GetMapping("/blocking/users/{user-id}/sync-avatar")
     @ResponseBody
-    fun syncAvatar(@PathVariable("user-id") id: Long = 0, @RequestParam(required = false) delay:Long? = null): UserJpa? =
-            blockingUserDao.findById(id).toNullable()?.let {
-                val avatar = blockingAvatarService.randomAvatar(delay)
-                blockingUserDao.save(it.copy(avatarUrl = avatar.url))
-            }
+    fun syncAvatar(
+        @PathVariable("user-id") id: Long = 0,
+        @RequestParam(required = false) delay: Long? = null,
+    ): UserJpa? =
+        blockingUserDao.findById(id).toNullable()?.let {
+            val avatar = blockingAvatarService.randomAvatar(delay)
+            blockingUserDao.save(it.copy(avatarUrl = avatar.url))
+        }
 }
-
diff --git a/src/main/kotlin/org/up/blocking/model/User.kt b/src/main/kotlin/org/up/blocking/model/User.kt
index ce17b7f..2b0cd0c 100644
--- a/src/main/kotlin/org/up/blocking/model/User.kt
+++ b/src/main/kotlin/org/up/blocking/model/User.kt
@@ -1,21 +1,16 @@
 package org.up.blocking.model
 
-import javax.persistence.Column
-import javax.persistence.Entity
-import javax.persistence.GeneratedValue
-import javax.persistence.GenerationType
-
+import jakarta.persistence.*
 
 @Entity(name = "users")
 data class UserJpa(
-        @field: javax.persistence.Id @field: GeneratedValue(strategy = GenerationType.IDENTITY)
-        val id: Long,
-        @field:Column("user_name")
-        val userName: String,
-        val email: String,
-        @field:Column("email_verified")
-        val emailVerified:Boolean,
-        @field:Column("avatar_url")
-        val avatarUrl: String?) {
-
-}
+    @Id @GeneratedValue(strategy = GenerationType.IDENTITY)
+    val id: Long,
+    @Column(name = "user_name")
+    val userName: String,
+    val email: String,
+    @Column(name = "email_verified")
+    val emailVerified: Boolean,
+    @Column(name = "avatar_url")
+    val avatarUrl: String?,
+)
diff --git a/src/main/kotlin/org/up/blocking/repository/BlockingUserDao.kt b/src/main/kotlin/org/up/blocking/repository/BlockingUserDao.kt
index da9bd75..72c8f88 100644
--- a/src/main/kotlin/org/up/blocking/repository/BlockingUserDao.kt
+++ b/src/main/kotlin/org/up/blocking/repository/BlockingUserDao.kt
@@ -9,40 +9,43 @@ import org.springframework.web.client.RestTemplate
 import org.up.blocking.model.UserJpa
 import org.up.coroutines.model.AvatarDto
 
-
 @Repository
 interface BlockingUserDao : JpaRepository<UserJpa, Long>
 
 @Component
-class BlockingAvatarService(@Value("\${remote.service.delay.ms}")val  delayCfg:Long,
-                                 @Value("\${remote.service.url}")val baseUrl:String) {
-
+class BlockingAvatarService(
+    @Value("\${remote.service.delay.ms}")val delayCfg: Long,
+    @Value("\${remote.service.url}")val baseUrl: String,
+) {
     val restTemplate = RestTemplate()
 
     fun randomAvatar(delay: Long? = null): AvatarDto =
-            restTemplate.getForEntity("$baseUrl/avatar?delay=${delay ?: delayCfg}", AvatarDto::class.java).body!!.also {
-                logger.debug("fetch random avatar...")
-            }
+        restTemplate.getForEntity("$baseUrl/avatar?delay=${delay ?: delayCfg}", AvatarDto::class.java).body!!.also {
+            logger.debug("fetch random avatar...")
+        }
 
     companion object {
         val logger = LoggerFactory.getLogger(BlockingAvatarService::class.java)
     }
-
 }
 
 @Component
-class BlockingEnrollmentService(@Value("\${remote.service.delay.ms}")val  delayCfg:Long,
-                                @Value("\${remote.service.url}")val baseUrl:String) {
-
+class BlockingEnrollmentService(
+    @Value("\${remote.service.delay.ms}")val delayCfg: Long,
+    @Value("\${remote.service.url}")val baseUrl: String,
+) {
     val restTemplate = RestTemplate()
 
-    fun verifyEmail(email:String, delay: Long? = null): Boolean =
-            restTemplate.getForEntity("$baseUrl/echo?email=$email&value=true&delay=${delay ?: delayCfg}", String::class.java).body!! == "true".also {
-                        logger.debug("verify email $email...")
-                    }
+    fun verifyEmail(
+        email: String,
+        delay: Long? = null,
+    ): Boolean =
+        restTemplate.getForEntity("$baseUrl/echo?email=$email&value=true&delay=${delay ?: delayCfg}", String::class.java).body!! ==
+            "true".also {
+                logger.debug("verify email $email...")
+            }
 
     companion object {
         val logger = LoggerFactory.getLogger(BlockingEnrollmentService::class.java)
     }
-
-}
\ No newline at end of file
+}
diff --git a/src/main/kotlin/org/up/coroutines/NonBlockingConfig.kt b/src/main/kotlin/org/up/coroutines/NonBlockingConfig.kt
index 997c751..b0de004 100644
--- a/src/main/kotlin/org/up/coroutines/NonBlockingConfig.kt
+++ b/src/main/kotlin/org/up/coroutines/NonBlockingConfig.kt
@@ -1,8 +1,10 @@
-package org.up.coroutines.config
+package org.up.coroutines
 
 import io.r2dbc.h2.H2ConnectionConfiguration
 import io.r2dbc.h2.H2ConnectionFactory
 import io.r2dbc.spi.ConnectionFactory
+import jakarta.annotation.PostConstruct
+import jakarta.annotation.PreDestroy
 import org.reactivestreams.Subscription
 import org.slf4j.MDC
 import org.springframework.beans.factory.annotation.Value
@@ -10,9 +12,12 @@ import org.springframework.context.annotation.Bean
 import org.springframework.context.annotation.Configuration
 import org.springframework.core.io.ClassPathResource
 import org.springframework.data.r2dbc.config.AbstractR2dbcConfiguration
-import org.springframework.data.r2dbc.connectionfactory.init.CompositeDatabasePopulator
-import org.springframework.data.r2dbc.connectionfactory.init.ConnectionFactoryInitializer
-import org.springframework.data.r2dbc.connectionfactory.init.ResourceDatabasePopulator
+import org.springframework.r2dbc.connection.init.CompositeDatabasePopulator
+import org.springframework.r2dbc.connection.init.ConnectionFactoryInitializer
+import org.springframework.r2dbc.connection.init.ResourceDatabasePopulator
+// import org.springframework.data.r2dbc.connectionfactory.init.CompositeDatabasePopulator
+// import org.springframework.data.r2dbc.connectionfactory.init.ConnectionFactoryInitializer
+// import org.springframework.data.r2dbc.connectionfactory.init.ResourceDatabasePopulator
 import org.springframework.stereotype.Component
 import org.springframework.web.reactive.config.EnableWebFlux
 import org.springframework.web.reactive.config.WebFluxConfigurer
@@ -27,9 +32,6 @@ import reactor.core.publisher.Operators
 import reactor.util.context.Context
 import java.util.*
 import java.util.stream.Collectors
-import javax.annotation.PostConstruct
-import javax.annotation.PreDestroy
-
 
 @Configuration
 class DatastoreConfig : AbstractR2dbcConfiguration() {
@@ -45,13 +47,14 @@ class DatastoreConfig : AbstractR2dbcConfiguration() {
     @Bean
     override fun connectionFactory(): ConnectionFactory {
         println("init connectionFactory")
-        return H2ConnectionFactory(H2ConnectionConfiguration.builder()
-
-                //.inMemory(dbName)
+        return H2ConnectionFactory(
+            H2ConnectionConfiguration.builder()
+                // .inMemory(dbName)
                 .url(url.removePrefix("jdbc:h2:"))
                 .username(userName)
                 .password(password)
-                .build())
+                .build(),
+        )
     }
 
     @Bean
@@ -64,33 +67,31 @@ class DatastoreConfig : AbstractR2dbcConfiguration() {
         initializer.setDatabasePopulator(populator)
         return initializer
     }
-
 }
+
 @Configuration
 @EnableWebFlux
-class WebFluxConfig : WebFluxConfigurer {
-
-}
-
+class WebFluxConfig : WebFluxConfigurer
 
 @Component
 class MdcWebFilter : WebFilter {
-    override fun filter(serverWebExchange: ServerWebExchange,
-               webFilterChain: WebFilterChain): Mono<Void> {
+    override fun filter(
+        serverWebExchange: ServerWebExchange,
+        webFilterChain: WebFilterChain,
+    ): Mono<Void> {
         val reqId = UUID.randomUUID().toString().replace("-", "").take(10)
         MDC.put(MDC_REQUEST_ID, reqId)
-        //println("set: " + MDC.get(MDC_REQUEST_ID))
-        return webFilterChain.filter(serverWebExchange).subscriberContext{it.put(MDC_REQUEST_ID, reqId)}
+        // println("set: " + MDC.get(MDC_REQUEST_ID))
+        return webFilterChain.filter(serverWebExchange).contextWrite { it.put(MDC_REQUEST_ID, reqId) }
     }
+
     companion object {
         const val MDC_REQUEST_ID = "req-id"
     }
 }
 
-
 @Configuration
 class MdcContextLifterConfiguration {
-
     companion object {
         val MDC_CONTEXT_REACTOR_KEY: String = MdcContextLifterConfiguration::class.java.name
     }
@@ -104,14 +105,12 @@ class MdcContextLifterConfiguration {
     fun cleanupHook() {
         Hooks.resetOnEachOperator(MDC_CONTEXT_REACTOR_KEY)
     }
-
 }
 
 /**
  * Helper that copies the state of Reactor [Context] to MDC on the #onNext function.
  */
 class MdcContextLifter<T>(private val coreSubscriber: CoreSubscriber<T>) : CoreSubscriber<T> {
-
     override fun onNext(t: T) {
         coreSubscriber.currentContext().copyToMdc()
         coreSubscriber.onNext(t)
@@ -141,7 +140,8 @@ class MdcContextLifter<T>(private val coreSubscriber: CoreSubscriber<T>) : CoreS
  */
 private fun Context.copyToMdc() {
     if (!this.isEmpty) {
-        val map: Map<String, String> = this.stream()
+        val map: Map<String, String> =
+            this.stream()
                 .collect(Collectors.toMap({ e -> e.key.toString() }, { e -> e.value.toString() }))
         MDC.setContextMap(map)
     } else {
@@ -149,11 +149,8 @@ private fun Context.copyToMdc() {
     }
 }
 
-
-
 @Configuration
 class WebClientConfiguration {
-
     @Bean
     fun webClient() = WebClient.builder().baseUrl("http://localhost:8080").build()
-}
\ No newline at end of file
+}
diff --git a/src/main/kotlin/org/up/coroutines/controller/ProductController.kt b/src/main/kotlin/org/up/coroutines/controller/ProductController.kt
index 68c3b40..04c6491 100644
--- a/src/main/kotlin/org/up/coroutines/controller/ProductController.kt
+++ b/src/main/kotlin/org/up/coroutines/controller/ProductController.kt
@@ -1,13 +1,13 @@
 package org.up.coroutines.controller
 
-import org.up.coroutines.model.Product
-import org.up.coroutines.repository.ProductRepository
 import org.springframework.beans.factory.annotation.Autowired
 import org.springframework.http.MediaType
 import org.springframework.web.bind.annotation.*
 import org.springframework.web.reactive.function.client.WebClient
 import org.springframework.web.reactive.function.client.bodyToMono
+import org.up.coroutines.model.Product
 import org.up.coroutines.model.ProductStockView
+import org.up.coroutines.repository.ProductRepository
 import reactor.core.publisher.Flux
 import reactor.core.publisher.Mono
 import java.time.Duration
@@ -16,24 +16,30 @@ import java.time.Duration
 class ProductController {
     @Autowired
     lateinit var webClient: WebClient
+
     @Autowired
     lateinit var productRepository: ProductRepository
 
     @GetMapping("/productsf/{id}")
-    fun findOne(@PathVariable id: Int): Mono<Product> {
+    fun findOne(
+        @PathVariable id: Int,
+    ): Mono<Product> {
         return productRepository
-          .getProductById(id)
+            .getProductById(id)
     }
 
     @GetMapping("/productsf/{id}/stock")
-    fun findOneInStock(@PathVariable id: Int): Mono<ProductStockView> {
+    fun findOneInStock(
+        @PathVariable id: Int,
+    ): Mono<ProductStockView> {
         val product = productRepository.getProductById(id)
 
-        val stockQuantity = webClient.get()
-          .uri("/productsf/$id/quantity")
-          .accept(MediaType.APPLICATION_JSON)
-          .retrieve()
-          .bodyToMono<Int>()
+        val stockQuantity =
+            webClient.get()
+                .uri("/productsf/$id/quantity")
+                .accept(MediaType.APPLICATION_JSON)
+                .retrieve()
+                .bodyToMono<Int>()
         return product.zipWith(stockQuantity) { productInStock, stockQty ->
             ProductStockView(productInStock, stockQty)
         }
@@ -45,8 +51,10 @@ class ProductController {
     }
 
     @GetMapping(value = ["/productsf/sse"], produces = [(MediaType.TEXT_EVENT_STREAM_VALUE)])
-    fun allMessages(@RequestParam(defaultValue = "5") size: Int = 1000): Flux<String> {
-        //return this.messageService.findWithTailableCursorByRoom(room)
+    fun allMessages(
+        @RequestParam(defaultValue = "5") size: Int = 1000,
+    ): Flux<String> {
+        // return this.messageService.findWithTailableCursorByRoom(room)
         return Flux.interval(Duration.ofSeconds(1)).map { i -> i.toString() }
     }
 
@@ -56,7 +64,10 @@ class ProductController {
     }
 
     @PostMapping("/productsf/{name}/{price}")
-    fun postProduct(@PathVariable("name") name:String, @PathVariable("price") price:Int): Mono<Product> {
+    fun postProduct(
+        @PathVariable("name") name: String,
+        @PathVariable("price") price: Int,
+    ): Mono<Product> {
         return productRepository.addNewProduct(name, price)
     }
 }
diff --git a/src/main/kotlin/org/up/coroutines/controller/ProductControllerCoroutines.kt b/src/main/kotlin/org/up/coroutines/controller/ProductControllerCoroutines.kt
index f85f30d..8828c3f 100644
--- a/src/main/kotlin/org/up/coroutines/controller/ProductControllerCoroutines.kt
+++ b/src/main/kotlin/org/up/coroutines/controller/ProductControllerCoroutines.kt
@@ -1,7 +1,5 @@
 package org.up.coroutines.controller
 
-import org.up.coroutines.model.Product
-import org.up.coroutines.repository.ProductRepositoryCoroutines
 import kotlinx.coroutines.Deferred
 import kotlinx.coroutines.FlowPreview
 import kotlinx.coroutines.GlobalScope
@@ -17,7 +15,9 @@ import org.springframework.web.bind.annotation.RequestParam
 import org.springframework.web.reactive.function.client.WebClient
 import org.springframework.web.reactive.function.client.awaitBody
 import org.springframework.web.reactive.function.client.awaitExchange
+import org.up.coroutines.model.Product
 import org.up.coroutines.model.ProductStockView
+import org.up.coroutines.repository.ProductRepositoryCoroutines
 import reactor.core.publisher.Flux
 import java.time.Duration
 
@@ -29,33 +29,40 @@ class ProductControllerCoroutines {
     lateinit var productRepository: ProductRepositoryCoroutines
 
     @GetMapping("/products/{id}")
-    suspend fun findOne(@PathVariable id: Int): Product? {
+    suspend fun findOne(
+        @PathVariable id: Int,
+    ): Product? {
         return productRepository.getProductById(id)
     }
 
     @GetMapping("/products/{id}/stock")
-    suspend fun findOneInStock(@PathVariable id: Int): ProductStockView {
-        val product: Deferred<Product?> = GlobalScope.async {
-            productRepository.getProductById(id)
-        }
-        val quantity: Deferred<Int> = GlobalScope.async {
-            webClient.get()
-              .uri("/products/$id/quantity")
-              .accept(APPLICATION_JSON)
-              .awaitExchange().awaitBody<Int>()
-        }
+    suspend fun findOneInStock(
+        @PathVariable id: Int,
+    ): ProductStockView {
+        val product: Deferred<Product?> =
+            GlobalScope.async {
+                productRepository.getProductById(id)
+            }
+        val quantity: Deferred<Int> =
+            GlobalScope.async {
+                webClient.get()
+                    .uri("/products/$id/quantity")
+                    .accept(APPLICATION_JSON)
+                    .awaitExchange().awaitBody<Int>()
+            }
         return ProductStockView(product.await()!!, quantity.await())
     }
 
     @GetMapping(value = ["/products/sse"], produces = [(MediaType.TEXT_EVENT_STREAM_VALUE)])
-    suspend fun allMessages(@RequestParam(defaultValue = "5") size: Int = 5): Flow<String> {
+    suspend fun allMessages(
+        @RequestParam(defaultValue = "5") size: Int = 5,
+    ): Flow<String> {
         return Flux.interval(Duration.ofSeconds(1)).map { i -> i.toString() }.asFlow()
     }
 
-
     @FlowPreview
     @GetMapping("/products/")
     fun findAll(): Flow<Product> {
         return productRepository.getAllProducts()
     }
-}
\ No newline at end of file
+}
diff --git a/src/main/kotlin/org/up/coroutines/controller/UserController.kt b/src/main/kotlin/org/up/coroutines/controller/UserController.kt
index 80d8b69..b143db0 100644
--- a/src/main/kotlin/org/up/coroutines/controller/UserController.kt
+++ b/src/main/kotlin/org/up/coroutines/controller/UserController.kt
@@ -1,119 +1,158 @@
 package org.up.coroutines.controller
 
-import kotlinx.coroutines.flow.Flow
-import org.springframework.web.bind.annotation.*
-import org.up.coroutines.model.User
-import org.up.coroutines.repository.AvatarService
-import org.up.coroutines.repository.EnrollmentService
-import org.up.coroutines.repository.UserRepository
+import jakarta.transaction.Transactional
 import kotlinx.coroutines.async
 import kotlinx.coroutines.channels.BroadcastChannel
 import kotlinx.coroutines.channels.consumeEach
 import kotlinx.coroutines.delay
+import kotlinx.coroutines.flow.Flow
 import kotlinx.coroutines.flow.flow
 import kotlinx.coroutines.slf4j.MDCContext
 import kotlinx.coroutines.withContext
-import org.springframework.http.MediaType
-import kotlinx.coroutines.flow.*
 import org.springframework.http.HttpStatus
+import org.springframework.http.MediaType
 import org.springframework.http.codec.ServerSentEvent
+import org.springframework.web.bind.annotation.*
 import org.springframework.web.server.ResponseStatusException
-import javax.transaction.Transactional
+import org.up.blocking.repository.BlockingAvatarService
+import org.up.blocking.repository.BlockingEnrollmentService
+import org.up.coroutines.model.User
+import org.up.coroutines.repository.AvatarService
+import org.up.coroutines.repository.EnrollmentService
+import org.up.coroutines.repository.UserRepository
 
 @RestController
 class UserController(
-        private val userRepository: UserRepository,
-        private val avatarService: AvatarService,
-        private val enrollmentService: EnrollmentService
+    private val userRepository: UserRepository,
+    private val avatarService: AvatarService,
+    private val enrollmentService: EnrollmentService,
+    private val blockingEnrollmentService: BlockingEnrollmentService,
+    private val blockingAvatarService: BlockingAvatarService,
 ) {
-
-
     @GetMapping("/users")
     @ResponseBody
-    suspend fun getUsers(): Flow<User> =
-            userRepository.findAll()
-
+    suspend fun getUsers(): Flow<User> = userRepository.findAll()
 
     @GetMapping("/users/{user-id}")
     @ResponseBody
-    suspend fun getUser(@PathVariable("user-id") id: Long = 0): User? =
-            userRepository.findById(id)
-
+    suspend fun getUser(
+        @PathVariable("user-id") id: Long = 0,
+    ): User? = userRepository.findById(id)
 
     @GetMapping("/user")
     @ResponseBody
-    suspend fun userByName(@RequestParam("userName") userName: String): User? =
-        userRepository.findByUserName(userName)
+    suspend fun userByName(
+        @RequestParam("userName") userName: String,
+    ): User? = userRepository.findByUserName(userName)
 
     @PostMapping("/users")
     @ResponseBody
     @Transactional
-    suspend fun storeUser(@RequestBody user: User, @RequestParam(required = false) delay:Long? = null): User? = withContext(MDCContext()) {
-        val emailVerified = async { enrollmentService.verifyEmail(user.email, delay) }
-        val avatarUrl = async { user.avatarUrl ?: avatarService.randomAvatar(delay).url }
-        userRepository.save(user.copy(avatarUrl = avatarUrl.await(), emailVerified = emailVerified.await())).also {
-            channel.send(user.email)
+    suspend fun storeUser(
+        @RequestBody user: User,
+        @RequestParam(required = false) delay: Long? = null,
+    ): User? =
+        withContext(MDCContext()) {
+            val emailVerified = async { enrollmentService.verifyEmail(user.email, delay) }
+            val avatarUrl = async { user.avatarUrl ?: avatarService.randomAvatar(delay).url }
+            userRepository.save(user.copy(avatarUrl = avatarUrl.await(), emailVerified = emailVerified.await())).also {
+                channel.send(user.email)
+            }
         }
-    }
 
+    /**
+     * This method is a blocking version of the storeUser method.
+     * Because it uses the blockingEnrollmentService and blockingAvatarService.
+     * Which use restTemplate underlining, and it's blocking.
+     * But virtual threads are support restTemplate as well.
+     * So if enable virtual threads, it will be non-blocking.
+     * Here the response time > 400ms, because of the blockingEnrollmentService and blockingAvatarService.
+     * But we can use withContext(Dispatchers.IO) to make it non-blocking.(It's will exhausted the thread pool, if the thread pool size is small.)
+     *  Here the response time > 200ms
+     * And we can use Dispatchers.VT instead of Dispatchers.IO, to make it non-blocking.
+     *  Here the response time > 200ms
+     */
+    @PostMapping("/users/with-blocking")
+    @ResponseBody
+    @Transactional
+    suspend fun storeUserWithBlocking(
+        @RequestBody user: User,
+        @RequestParam(required = false) delay: Long? = null,
+    ): User? =
+        withContext(MDCContext()) {
+            val emailVerified = async { blockingEnrollmentService.verifyEmail(user.email, delay) }
+            val avatarUrl = async { user.avatarUrl ?: blockingAvatarService.randomAvatar(delay).url }
+            userRepository.save(user.copy(avatarUrl = avatarUrl.await(), emailVerified = emailVerified.await())).also {
+                channel.send(user.email)
+            }
+        }
 
     @GetMapping("/users/{user-id}/sync-avatar")
     @ResponseBody
     @Transactional
-    suspend fun syncAvatar(@PathVariable("user-id") id: Long = 0, @RequestParam(required = false) delay:Long? = null): User =
-            userRepository.findById(id)?.let {
-                val avatar = avatarService.randomAvatar(delay)
-                userRepository.save(it.copy(avatarUrl = avatar.url))
-            } ?: throw ResponseStatusException(HttpStatus.NOT_FOUND, "Unable to find user with id=$id")
-
-
-
+    suspend fun syncAvatar(
+        @PathVariable("user-id") id: Long = 0,
+        @RequestParam(required = false) delay: Long? = null,
+    ): User =
+        userRepository.findById(id)?.let {
+            val avatar = avatarService.randomAvatar(delay)
+            userRepository.save(it.copy(avatarUrl = avatar.url))
+        } ?: throw ResponseStatusException(HttpStatus.NOT_FOUND, "Unable to find user with id=$id")
 
     @GetMapping("/fibanocci/stream", produces = [MediaType.TEXT_EVENT_STREAM_VALUE])
     fun fibanocciFlow(): Flow<Long> {
-        val fibonacci: Sequence<Long> = generateSequence(Pair(0L, 1L), { Pair(it.second, it.first + it.second) }).map {  it.first }
+        val fibonacci: Sequence<Long> =
+            generateSequence(Pair(0L, 1L), { Pair(it.second, it.first + it.second) }).map { it.first }
         return flow {
-            fibonacci.forEach {next ->
+            fibonacci.forEach { next ->
                 if (next >= 0L) {
                     delay(800)
                     emit(next)
-                } else return@flow
+                } else {
+                    return@flow
+                }
             }
         }
     }
 
-
     @GetMapping("/infinite", produces = [MediaType.TEXT_EVENT_STREAM_VALUE])
-    fun infiniteFlow(): Flow<String>  = flow {
-        generateSequence(0){it + 1}.forEach {
-            emit(it.toString() + " \n")
+    fun infiniteFlow(): Flow<String> =
+        flow {
+            generateSequence(0) { it + 1 }.forEach {
+                emit(it.toString() + " \n")
+            }
         }
-    }
 
     @GetMapping("/infinite/sse", produces = [MediaType.TEXT_EVENT_STREAM_VALUE])
-    fun sseFlow(): Flow<ServerSentEvent<String>>  = flow {
-        generateSequence(0){it + 1}.map{it.toString()}.forEach {
-            emit(ServerSentEvent.builder<String>().id(it).data(it).build())
-            delay(it.toLong() % 1000)
+    fun sseFlow(): Flow<ServerSentEvent<String>> =
+        flow {
+            generateSequence(0) { it + 1 }.map { it.toString() }.forEach {
+                emit(ServerSentEvent.builder<String>().id(it).data(it).build())
+                delay(it.toLong() % 1000)
+            }
         }
-    }
 
     private val channel = BroadcastChannel<String>(128)
 
     @GetMapping("/users/stream", produces = [MediaType.TEXT_EVENT_STREAM_VALUE])
     @ResponseBody
-    suspend fun userFlow(@RequestParam("offset") offsetId: Long = 0): Flow<User> {
-        val userFlow: Flow<User> = flow {
-            var latestId = offsetId
-            suspend fun take() = userRepository.findById_GreaterThan(latestId).collect { user ->
-                emit(user).also { latestId = user.id!! }
+    suspend fun userFlow(
+        @RequestParam("offset") offsetId: Long = 0,
+    ): Flow<User> {
+        val userFlow: Flow<User> =
+            flow {
+                var latestId = offsetId
+
+                suspend fun take() =
+                    userRepository.findById_GreaterThan(latestId).collect { user ->
+                        emit(user).also { latestId = user.id!! }
+                    }
+                take()
+                channel.consumeEach {
+                    take()
+                    channel.cancel()
+                }
             }
-            take()
-            channel.consumeEach { take()
-            channel.cancel()}
-        }
         return userFlow
     }
-
-
 }
diff --git a/src/main/kotlin/org/up/coroutines/handlers/ProductsHandler.kt b/src/main/kotlin/org/up/coroutines/handlers/ProductsHandler.kt
index 6e2f288..f00ed16 100644
--- a/src/main/kotlin/org/up/coroutines/handlers/ProductsHandler.kt
+++ b/src/main/kotlin/org/up/coroutines/handlers/ProductsHandler.kt
@@ -1,12 +1,9 @@
 package org.up.coroutines.handlers
 
-import org.up.coroutines.model.Product
-import org.up.coroutines.repository.ProductRepositoryCoroutines
 import kotlinx.coroutines.*
-import kotlinx.coroutines.channels.BroadcastChannel
-import kotlinx.coroutines.channels.consumeEach
 import kotlinx.coroutines.flow.Flow
-import kotlinx.coroutines.flow.asFlow
+import kotlinx.coroutines.flow.MutableSharedFlow
+import kotlinx.coroutines.flow.asSharedFlow
 import kotlinx.coroutines.flow.flow
 import kotlinx.coroutines.reactive.asFlow
 import kotlinx.coroutines.reactive.awaitFirst
@@ -21,7 +18,9 @@ import org.springframework.web.reactive.function.client.WebClient
 import org.springframework.web.reactive.function.client.awaitBody
 import org.springframework.web.reactive.function.client.awaitExchange
 import org.springframework.web.reactive.function.server.*
+import org.up.coroutines.model.Product
 import org.up.coroutines.model.ProductStockView
+import org.up.coroutines.repository.ProductRepositoryCoroutines
 import reactor.core.publisher.Flux
 import java.time.Duration
 import java.util.*
@@ -29,25 +28,27 @@ import kotlin.math.absoluteValue
 
 @Component
 class ProductsHandler(
-  @Autowired var webClient: WebClient,
-  @Autowired var productRepository: ProductRepositoryCoroutines) {
-
+    @Autowired var webClient: WebClient,
+    @Autowired var productRepository: ProductRepositoryCoroutines,
+) {
     @FlowPreview
     suspend fun findAll(request: ServerRequest): ServerResponse =
-      ServerResponse.ok().json().bodyAndAwait(productRepository.getAllProducts())
+        ServerResponse.ok().json().bodyAndAwait(productRepository.getAllProducts())
 
     suspend fun findOneInStock(request: ServerRequest): ServerResponse {
         val id = request.pathVariable("id").toInt()
 
-        val product: Deferred<Product?> = GlobalScope.async {
-            productRepository.getProductById(id)
-        }
-        val quantity: Deferred<Int> = GlobalScope.async {
-            webClient.get()
-              .uri("/products/$id/quantity")
-              .accept(MediaType.APPLICATION_JSON)
-              .awaitExchange().awaitBody<Int>()
-        }
+        val product: Deferred<Product?> =
+            GlobalScope.async {
+                productRepository.getProductById(id)
+            }
+        val quantity: Deferred<Int> =
+            GlobalScope.async {
+                webClient.get()
+                    .uri("/products/$id/quantity")
+                    .accept(MediaType.APPLICATION_JSON)
+                    .awaitExchange().awaitBody<Int>()
+            }
         return ServerResponse.ok().json().bodyValueAndAwait(ProductStockView(product.await()!!, quantity.await()))
     }
 
@@ -55,134 +56,137 @@ class ProductsHandler(
         val id = request.pathVariable("id").toInt()
         return ServerResponse.ok().json().bodyValueAndAwait(productRepository.getProductById(id)!!)
     }
+
     suspend fun allMessagesFlux(request: ServerRequest): ServerResponse {
-        val flux = Flux.interval(Duration.ofSeconds(1)).map { i -> i.toString() }//.asFlow()
+        val flux = Flux.interval(Duration.ofSeconds(1)).map { i -> i.toString() } // .asFlow()
         return ServerResponse.ok().sse().body(flux).awaitFirst()
     }
 
     suspend fun allMessagesFlow(request: ServerRequest): ServerResponse {
         val size = request.queryParam("size").map { it.toInt() }.orElse(10)
-        val f = flow{
-            (1..size).forEach{
-                delay(1000)
-                emit(it.toString())
+        val f =
+            flow {
+                (1..size).forEach {
+                    delay(1000)
+                    emit(it.toString())
+                }
             }
-        }
         return ServerResponse.ok().sse().bodyAndAwait(f)
     }
 
     suspend fun forwardingEndpoint(request: ServerRequest): ServerResponse {
         val size = request.queryParam("size").map { it.toInt() }.orElse(10)
         val delay = request.queryParam("delay").map { it.toInt() }.orElse(500)
-        val type: ParameterizedTypeReference<ServerSentEvent<String>> = object : ParameterizedTypeReference<ServerSentEvent<String>>() {}
-        val stream = webClient.get()
-                    .uri("/products/sse/delayed?size=$size&delay=$delay")
-                    .retrieve()
-                    .bodyToFlux(type)
+        val type: ParameterizedTypeReference<ServerSentEvent<String>> =
+            object : ParameterizedTypeReference<ServerSentEvent<String>>() {}
+        val stream =
+            webClient.get()
+                .uri("/products/sse/delayed?size=$size&delay=$delay")
+                .retrieve()
+                .bodyToFlux(type)
                 .map { it.data()!! }
                 .asFlow()
         return ServerResponse.ok().sse().bodyAndAwait(stream)
     }
 
-
     suspend fun delayedEndpoint(request: ServerRequest): ServerResponse {
         val size = request.queryParam("size").map { it.toInt() }.orElse(10)
         val delay = request.queryParam("delay").map { it.toInt() }.orElse(500)
-        val f = flow{
-            (1..size).forEach{
-                delay(delay.toLong())
-                emit(it.toString())
+        val f =
+            flow {
+                (1..size).forEach {
+                    delay(delay.toLong())
+                    emit(it.toString())
+                }
             }
-        }
         return ServerResponse.ok().sse().bodyAndAwait(f)
     }
 
+    private val channel = MutableSharedFlow<String>(replay = 128)
 
-
-    private val channel = BroadcastChannel<String>(128)
     suspend fun produceChannel(request: ServerRequest): ServerResponse {
         val size = request.queryParam("size").map { it.toInt() }.orElse(10)
         val wait = request.queryParam("delay").map { it.toInt() }.orElse(500)
         val close = request.queryParam("close").map { it.toBoolean() }.orElse(false)
-        if(close) channel.close() else
-        GlobalScope.launch {
-            (1..size).forEach{
-                println("producing values $it")
-                delay(wait.toLong())
-                channel.send("channelmsg=${it.toString()}")
+
+        if (close) {
+            channel.resetReplayCache()
+        } else {
+            GlobalScope.launch {
+                (1..size).forEach {
+                    println("producing values $it")
+                    delay(wait.toLong())
+                    channel.emit("channelmsg=$it")
+                }
             }
         }
+
         return ServerResponse.ok().bodyValueAndAwait("feed channel")
     }
 
     suspend fun consumeChannel(request: ServerRequest): ServerResponse {
-      val flow = channel.asFlow()
+        val flow = channel.asSharedFlow()
         return ServerResponse.ok().sse().bodyAndAwait(flow)
     }
 
-
-
-
-
-    //=================================================
+    // =================================================
     suspend fun consumeDynamic(request: ServerRequest): ServerResponse {
-        val seq:Sequence<Int?> = generateSequence(5){getItem()}
-        val f:Flow<String> = flow {
-            suspend fun take() = seq.takeWhile { it != null }.forEach {
-                println("emitting")
-                delay(500)
-                emit(it.toString())
-            }
-            take()
-            channel.consumeEach {
-                println("notification")
+        val seq: Sequence<Int?> = generateSequence(5) { getItem() }
+        val f: Flow<String> =
+            flow {
+                suspend fun take() =
+                    seq.takeWhile { it != null }.forEach {
+                        println("emitting")
+                        delay(500)
+                        emit(it.toString())
+                    }
                 take()
-            }
-
 
-        }
+                channel.collect {
+                    println("notification")
+                    take()
+                }
+            }
         return ServerResponse.ok().sse().bodyAndAwait(f)
-
     }
 
-     fun getItem():Int? =
+    fun getItem(): Int? =
         (Random().nextInt().absoluteValue % 5).run {
             if (this != 0) this else null
         }
 }
 
-
 @Configuration
 class RouterConfiguration {
-
     @FlowPreview
     @Bean
-    fun productRoutes(productsHandler: ProductsHandler) = coRouter {
-        GET("/products/", productsHandler::findAll)
-        accept(MediaType.TEXT_EVENT_STREAM).nest {
-            GET("/products/sse", productsHandler::allMessagesFlux)
-        }
-        accept(MediaType.TEXT_EVENT_STREAM).nest {
-            GET("/products/sse2", productsHandler::allMessagesFlow)
-        }
-        accept(MediaType.TEXT_EVENT_STREAM).nest {
-            GET("/products/sse/forwarding", productsHandler::forwardingEndpoint)
-        }
-        accept(MediaType.TEXT_EVENT_STREAM).nest {
-            GET("/products/sse/delayed", productsHandler::delayedEndpoint)
-        }
+    fun productRoutes(productsHandler: ProductsHandler) =
+        coRouter {
+            GET("/products", productsHandler::findAll)
+            accept(MediaType.TEXT_EVENT_STREAM).nest {
+                GET("/products/sse", productsHandler::allMessagesFlux)
+            }
+            accept(MediaType.TEXT_EVENT_STREAM).nest {
+                GET("/products/sse2", productsHandler::allMessagesFlow)
+            }
+            accept(MediaType.TEXT_EVENT_STREAM).nest {
+                GET("/products/sse/forwarding", productsHandler::forwardingEndpoint)
+            }
+            accept(MediaType.TEXT_EVENT_STREAM).nest {
+                GET("/products/sse/delayed", productsHandler::delayedEndpoint)
+            }
 
-        accept(MediaType.TEXT_EVENT_STREAM).nest {
-            GET("/products/sse/produce", productsHandler::produceChannel)
-        }
-        accept(MediaType.TEXT_EVENT_STREAM).nest {
-            GET("/products/sse/consume", productsHandler::consumeChannel)
-        }
+            accept(MediaType.TEXT_EVENT_STREAM).nest {
+                GET("/products/sse/produce", productsHandler::produceChannel)
+            }
+            accept(MediaType.TEXT_EVENT_STREAM).nest {
+                GET("/products/sse/consume", productsHandler::consumeChannel)
+            }
 
-        accept(MediaType.TEXT_EVENT_STREAM).nest {
-            GET("/products/sse/consume-dynamic", productsHandler::consumeDynamic)
+            accept(MediaType.TEXT_EVENT_STREAM).nest {
+                GET("/products/sse/consume-dynamic", productsHandler::consumeDynamic)
+            }
+            GET("/products/{id}", productsHandler::findOne)
+            GET("/products/{id}/stock", productsHandler::findOneInStock)
         }
-        GET("/products/{id}", productsHandler::findOne)
-        GET("/products/{id}/stock", productsHandler::findOneInStock)
-    }
-}
\ No newline at end of file
+}
diff --git a/src/main/kotlin/org/up/coroutines/model/Product.kt b/src/main/kotlin/org/up/coroutines/model/Product.kt
index f2d0945..a57f494 100644
--- a/src/main/kotlin/org/up/coroutines/model/Product.kt
+++ b/src/main/kotlin/org/up/coroutines/model/Product.kt
@@ -5,10 +5,10 @@ import org.springframework.data.relational.core.mapping.Table
 
 @Table
 data class Product(
-        @Id
-        var id: Int? = null,
-        var name: String = "",
-        var price: Int = 0
+    @Id
+    var id: Int? = null,
+    var name: String = "",
+    var price: Int = 0,
 )
 
 data class ProductStockView(val product: Product, var stockQuantity: Int) {
@@ -21,4 +21,4 @@ data class ProductStockView(val product: Product, var stockQuantity: Int) {
         this.name = product.name
         this.price = product.price
     }
-}
\ No newline at end of file
+}
diff --git a/src/main/kotlin/org/up/coroutines/model/User.kt b/src/main/kotlin/org/up/coroutines/model/User.kt
index 689f07e..36349c3 100644
--- a/src/main/kotlin/org/up/coroutines/model/User.kt
+++ b/src/main/kotlin/org/up/coroutines/model/User.kt
@@ -3,21 +3,19 @@ package org.up.coroutines.model
 import com.fasterxml.jackson.annotation.JsonCreator
 import com.fasterxml.jackson.annotation.JsonProperty
 import org.springframework.data.annotation.Id
-import org.springframework.data.relational.core.mapping.Column
 import org.springframework.data.relational.core.mapping.Table
-import java.net.URL
-import java.util.*
-
 
 @Table("users")
-data class User(@Id val id: Long? = null,
-                val userName: String,
-                val email: String,
-                val emailVerified: Boolean = false,
-                val avatarUrl: String? = null) {
-
-}
-
-
-data class AvatarDto @JsonCreator constructor(@JsonProperty("url") val url: String)
+data class User(
+    @Id val id: Long? = null,
+    val userName: String,
+    val email: String,
+    val emailVerified: Boolean = false,
+    val avatarUrl: String? = null,
+)
 
+data class AvatarDto
+@JsonCreator
+constructor(
+    @JsonProperty("url") val url: String,
+)
diff --git a/src/main/kotlin/org/up/coroutines/repository/CoroutineBridgeCrudRepository.kt b/src/main/kotlin/org/up/coroutines/repository/CoroutineBridgeCrudRepository.kt
index 4ea7f4f..0a065c9 100644
--- a/src/main/kotlin/org/up/coroutines/repository/CoroutineBridgeCrudRepository.kt
+++ b/src/main/kotlin/org/up/coroutines/repository/CoroutineBridgeCrudRepository.kt
@@ -1,24 +1,16 @@
 package org.up.coroutines.repository
 
-
-import kotlinx.coroutines.flow.Flow
-import kotlinx.coroutines.reactive.asFlow
-import kotlinx.coroutines.reactive.awaitFirst
-import kotlinx.coroutines.reactive.awaitFirstOrNull
-import org.springframework.data.repository.reactive.ReactiveCrudRepository
-
-
-//does not work yet as to 2.3.0.RC1
-//@Repository
-//interface UserRepository_ : CoroutineCrudRepository<User, Long> {
+// does not work yet as to 2.3.0.RC1
+// @Repository
+// interface UserRepository_ : CoroutineCrudRepository<User, Long> {
 //
 //    @Query("SELECT * FROM users WHERE id = ?0")
 //    suspend fun findOne(id: Long): User?
 //
 //    //fun findByFirstname(firstname: String): Flow<User>
-//}
+// }
 
-//abstract class CoroutineCrudRepository<R:ReactiveCrudRepository<T, ID>, T:Any, ID>(val underlying:R) {
+// abstract class CoroutineCrudRepository<R:ReactiveCrudRepository<T, ID>, T:Any, ID>(val underlying:R) {
 //
 //    suspend fun <S : T?> save(entity: S): S = underlying.save(entity).awaitFirst()
 //
@@ -40,4 +32,4 @@ import org.springframework.data.repository.reactive.ReactiveCrudRepository
 //
 //    suspend fun deleteAll() = underlying.deleteAll().awaitFirst()
 //
-//}
+// }
diff --git a/src/main/kotlin/org/up/coroutines/repository/ProductRepository.kt b/src/main/kotlin/org/up/coroutines/repository/ProductRepository.kt
index 1b43b8c..29aa853 100644
--- a/src/main/kotlin/org/up/coroutines/repository/ProductRepository.kt
+++ b/src/main/kotlin/org/up/coroutines/repository/ProductRepository.kt
@@ -4,66 +4,77 @@ import kotlinx.coroutines.FlowPreview
 import kotlinx.coroutines.flow.Flow
 import kotlinx.coroutines.reactive.asFlow
 import kotlinx.coroutines.reactive.awaitFirstOrNull
-import org.springframework.data.r2dbc.core.DatabaseClient
+import org.springframework.data.r2dbc.convert.MappingR2dbcConverter
+import org.springframework.r2dbc.core.DatabaseClient
 import org.springframework.stereotype.Repository
 import org.up.coroutines.model.Product
 import reactor.core.publisher.Flux
 import reactor.core.publisher.Mono
 
 @Repository
-class ProductRepository(private val client: DatabaseClient) {
-
+class ProductRepository(
+    private val client: DatabaseClient,
+    private val converter: MappingR2dbcConverter,
+) {
     fun getProductById(id: Int): Mono<Product> {
-        return client.execute("SELECT * FROM product WHERE id = $1")
-          .bind(0, id)
-          .`as`(Product::class.java)
-          .fetch()
-          .one()
+        return client.sql("SELECT * FROM product WHERE id = $1")
+            .bind(0, id)
+            .map { row, meta ->
+                converter.read(Product::class.java, row, meta)
+            }
+            .one()
     }
 
-    fun addNewProduct(name: String, price: Int): Mono<Product> {
-        val product = Product(name =  name, price = price)
-        return client.insert()
-                .into(Product::class.java)
-                .using(product)
-                .map{i -> i.get("id", Integer::class.java)}
-                .first()
-                .map { id -> product.copy(id = id?.toInt()) }
+    fun addNewProduct(
+        name: String,
+        price: Int,
+    ): Mono<Product> {
+        val product = Product(name = name, price = price)
+        return client.sql { "INSERT INTO product (name, price) VALUES($1, $2)" }
+            .map { i -> i.get("id", Integer::class.java) }
+            .first()
+            .map { id -> product.copy(id = id?.toInt()) }
     }
 
     fun getAllProducts(): Flux<Product> {
-        return client.select().from("product")
-          .`as`(Product::class.java)
-          .fetch()
-          .all()
+        return client.sql("SELECT * FROM product")
+            .map { row, meta ->
+                converter.read(Product::class.java, row, meta)
+            }
+            .all()
     }
 }
 
 @Repository
-class ProductRepositoryCoroutines(private val client: DatabaseClient) {
-
+class ProductRepositoryCoroutines(
+    private val client: DatabaseClient,
+    private val converter: MappingR2dbcConverter,
+) {
     suspend fun getProductById(id: Int): Product? =
-            client.execute("SELECT * FROM product WHERE id = $1")
-                    .bind(0, id)
-                    .`as`(Product::class.java)
-                    .fetch()
-                    .one()
-                    .awaitFirstOrNull()
+        client.sql("SELECT * FROM product WHERE id = $1")
+            .bind(0, id)
+            .map { row, meta ->
+                converter.read(Product::class.java, row, meta)
+            }
+            .one()
+            .awaitFirstOrNull()
 
-    suspend fun addNewProduct(name: String, price: Int) =
-            client.execute("INSERT INTO product (name, price) VALUES($1, $2)")
-                    .bind(0, name)
-                    .bind(1, price)
-                    .then()
-                    .awaitFirstOrNull()
+    suspend fun addNewProduct(
+        name: String,
+        price: Int,
+    ) = client.sql("INSERT INTO product (name, price) VALUES($1, $2)")
+        .bind(0, name)
+        .bind(1, price)
+        .then()
+        .awaitFirstOrNull()
 
     @FlowPreview
     fun getAllProducts(): Flow<Product> =
-            client.select()
-                    .from("products")
-                    .`as`(Product::class.java)
-                    .fetch()
-                    .all()
-                    .log()
-                    .asFlow()
-}
\ No newline at end of file
+        client.sql("SELECT * FROM product")
+            .map { row, meta ->
+                converter.read(Product::class.java, row, meta)
+            }
+            .all()
+            .log()
+            .asFlow()
+}
diff --git a/src/main/kotlin/org/up/coroutines/repository/UserRepository.kt b/src/main/kotlin/org/up/coroutines/repository/UserRepository.kt
index aab88c8..5a5b285 100644
--- a/src/main/kotlin/org/up/coroutines/repository/UserRepository.kt
+++ b/src/main/kotlin/org/up/coroutines/repository/UserRepository.kt
@@ -1,75 +1,70 @@
 package org.up.coroutines.repository
 
 import kotlinx.coroutines.flow.Flow
-import kotlinx.coroutines.reactive.asFlow
 import org.slf4j.LoggerFactory
 import org.springframework.beans.factory.annotation.Value
-import org.springframework.data.r2dbc.repository.Query
 import org.springframework.data.repository.kotlin.CoroutineCrudRepository
-import org.springframework.data.repository.reactive.ReactiveCrudRepository
 import org.springframework.stereotype.Component
 import org.springframework.stereotype.Repository
 import org.springframework.web.reactive.function.client.WebClient
 import org.springframework.web.reactive.function.client.awaitBody
 import org.up.coroutines.model.AvatarDto
 import org.up.coroutines.model.User
-import reactor.core.publisher.Flux
-
 
 @Repository
 interface UserRepository : CoroutineCrudRepository<User, Long> {
+    // @Query("select * from users e where e.id > :id")
+    fun findById_GreaterThan(id: Long): Flow<User>
 
-    //@Query("select * from users e where e.id > :id")
-    fun findById_GreaterThan(id: Long) : Flow<User>
-
-    suspend fun findByUserName(userName: String) : User?
+    suspend fun findByUserName(userName: String): User?
 }
 
-
-//@Component
-//class UserRepository(val reactiveUserRepository: ReactiveUserRepository) : CoroutineCrudRepository<User, Long> {
+// @Component
+// class UserRepository(val reactiveUserRepository: ReactiveUserRepository) : CoroutineCrudRepository<User, Long> {
 //    suspend fun findUsersGreatherThan(id:Long) = findUsersGreatherThan(id).asFlow()
 //
-//}
+// }
 
 @Component
-class AvatarService(@Value("\${remote.service.delay.ms}") val delayCfg: Long,
-                    @Value("\${remote.service.url}") val baseUrl: String) {
-
+class AvatarService(
+    @Value("\${remote.service.delay.ms}") val delayCfg: Long,
+    @Value("\${remote.service.url}") val baseUrl: String,
+) {
     private val client by lazy { WebClient.create(baseUrl) }
 
-    suspend fun randomAvatar(delay:Long? = null): AvatarDto =
-            client.get()
-                    .uri("/avatar?delay=${delay ?: delayCfg}")
-                    .retrieve()
-                    .awaitBody<AvatarDto>().also {
-                        logger.debug("fetch random avatar...")
-                    }
+    suspend fun randomAvatar(delay: Long? = null): AvatarDto =
+        client.get()
+            .uri("/avatar?delay=${delay ?: delayCfg}")
+            .retrieve()
+            .awaitBody<AvatarDto>().also {
+                logger.debug("fetch random avatar...")
+            }
 
     companion object {
         val logger = LoggerFactory.getLogger(AvatarService::class.java)
     }
-
 }
 
 @Component
-class EnrollmentService(@Value("\${remote.service.delay.ms}") val delayCfg: Long,
-                        @Value("\${remote.service.url}") val baseUrl: String) {
-
+class EnrollmentService(
+    @Value("\${remote.service.delay.ms}") val delayCfg: Long,
+    @Value("\${remote.service.url}") val baseUrl: String,
+) {
     private val client by lazy { WebClient.create(baseUrl) }
 
-    suspend fun verifyEmail(email: String, delay:Long? = null): Boolean =
-            client.get()
-                    .uri("/echo?email=$email&value=true&delay=${delay ?: delayCfg}")
-                    .retrieve()
-                    .awaitBody<String>()
-                    .toBoolean().also {
-                        logger.debug("verify email $email...")
-                    }
+    suspend fun verifyEmail(
+        email: String,
+        delay: Long? = null,
+    ): Boolean =
+        client.get()
+            .uri("/echo?email=$email&value=true&delay=${delay ?: delayCfg}")
+            .retrieve()
+            .awaitBody<String>()
+            .toBoolean().also {
+                logger.debug("verify email $email...")
+            }
 
     companion object {
         val logger = LoggerFactory.getLogger(EnrollmentService::class.java)
     }
-
-
-}
\ No newline at end of file
+}
diff --git a/src/main/kotlin/org/up/reactor/controller/ReactorUserController.kt b/src/main/kotlin/org/up/reactor/controller/ReactorUserController.kt
index 421f801..7b47d2d 100644
--- a/src/main/kotlin/org/up/reactor/controller/ReactorUserController.kt
+++ b/src/main/kotlin/org/up/reactor/controller/ReactorUserController.kt
@@ -1,7 +1,7 @@
 package org.up.reactor.controller
 
+import jakarta.transaction.Transactional
 import org.springframework.http.HttpStatus
-import org.springframework.http.MediaType
 import org.springframework.web.bind.annotation.*
 import org.springframework.web.server.ResponseStatusException
 import org.up.coroutines.model.User
@@ -10,37 +10,36 @@ import org.up.reactor.repository.ReactorEnrollmentService
 import org.up.reactor.repository.ReactorUserRepository
 import org.up.utils.component1
 import org.up.utils.component2
-import reactor.core.publisher.EmitterProcessor
 import reactor.core.publisher.Flux
 import reactor.core.publisher.Mono
-import reactor.core.scheduler.Schedulers
-import javax.transaction.Transactional
-
 
 @RestController
-open class ReactorUserController(
-        private val reactorUserDao: ReactorUserRepository,
-        private val reactorAvatarService: ReactorAvatarService,
-        private val reactorEnrollmentService: ReactorEnrollmentService
+class ReactorUserController(
+    private val reactorUserDao: ReactorUserRepository,
+    private val reactorAvatarService: ReactorAvatarService,
+    private val reactorEnrollmentService: ReactorEnrollmentService,
 ) {
-
     @GetMapping("/reactor/users")
     @ResponseBody
-    fun getUsers(): Flux<User> =
-            reactorUserDao.findAll()
+    fun getUsers(): Flux<User> = reactorUserDao.findAll()
 
     @GetMapping("/reactor/{user-id}")
     @ResponseBody
-    fun getUser(@PathVariable("user-id") id: Long): Mono<User> {
+    fun getUser(
+        @PathVariable("user-id") id: Long,
+    ): Mono<User> {
         return reactorUserDao.findById(id)
     }
 
     @PostMapping("/reactor/users")
     @ResponseBody
     @Transactional
-    fun storeUser(@RequestBody user: User, @RequestParam(required = false) delay:Long? = null): Mono<User> {
-        val avatarM = reactorAvatarService.randomAvatar(delay)//.subscribeOn(Schedulers.elastic())
-        val verifyEmailM = reactorEnrollmentService.verifyEmail(user.email, delay)//.subscribeOn(Schedulers.elastic())
+    fun storeUser(
+        @RequestBody user: User,
+        @RequestParam(required = false) delay: Long? = null,
+    ): Mono<User> {
+        val avatarM = reactorAvatarService.randomAvatar(delay) // .subscribeOn(Schedulers.elastic())
+        val verifyEmailM = reactorEnrollmentService.verifyEmail(user.email, delay) // .subscribeOn(Schedulers.elastic())
         return Mono.zip(avatarM, verifyEmailM).flatMap { (avatar, emailVerified) ->
             reactorUserDao.save(user.copy(avatarUrl = avatar.url, emailVerified = emailVerified))
         }
@@ -49,16 +48,18 @@ open class ReactorUserController(
     @GetMapping("/reactor/{user-id}/sync-avatar")
     @ResponseBody
     @Transactional
-    fun syncAvatar(@PathVariable("user-id") id: Long, @RequestParam(required = false) delay:Long? = null): Flux<User> {
+    fun syncAvatar(
+        @PathVariable("user-id") id: Long,
+        @RequestParam(required = false) delay: Long? = null,
+    ): Flux<User> {
         return reactorUserDao.findById(id)
-                .flatMap { user ->
-                    reactorAvatarService.randomAvatar(delay)
-                            .flatMap { avatar ->
-                                reactorUserDao.save(user.copy(avatarUrl = avatar.url))
-                            }
-                }.switchIfEmpty(Mono.error(ResponseStatusException(HttpStatus.NOT_FOUND, "Unable to find user with id=$id")))
-                .flux()
+            .flatMap { user ->
+                reactorAvatarService.randomAvatar(delay)
+                    .flatMap { avatar ->
+                        reactorUserDao.save(user.copy(avatarUrl = avatar.url))
+                    }
+            }
+            .switchIfEmpty(Mono.error(ResponseStatusException(HttpStatus.NOT_FOUND, "Unable to find user with id=$id")))
+            .flux()
     }
-
 }
-
diff --git a/src/main/kotlin/org/up/reactor/repository/ReactorUserRepository.kt b/src/main/kotlin/org/up/reactor/repository/ReactorUserRepository.kt
index 53c0717..6b3d588 100644
--- a/src/main/kotlin/org/up/reactor/repository/ReactorUserRepository.kt
+++ b/src/main/kotlin/org/up/reactor/repository/ReactorUserRepository.kt
@@ -7,62 +7,58 @@ import org.springframework.data.repository.reactive.ReactiveCrudRepository
 import org.springframework.stereotype.Component
 import org.springframework.stereotype.Repository
 import org.springframework.web.reactive.function.client.WebClient
-import org.springframework.web.reactive.function.client.awaitBody
-import org.up.blocking.repository.BlockingAvatarService
-import org.up.blocking.repository.BlockingEnrollmentService
 import org.up.coroutines.model.AvatarDto
 import org.up.coroutines.model.User
 import reactor.core.publisher.Flux
 import reactor.core.publisher.Mono
 
-
 @Repository
 interface ReactorUserRepository : ReactiveCrudRepository<User, Long> {
     @Query("select * from users e where e.id > :id")
     fun findUsersGreatherThan(id: Long): Flux<User>
-
 }
 
-
 @Component
-class ReactorAvatarService(@Value("\${remote.service.delay.ms}") val delayCfg: Long,
-                           @Value("\${remote.service.url}") val baseUrl: String) {
-
+class ReactorAvatarService(
+    @Value("\${remote.service.delay.ms}") val delayCfg: Long,
+    @Value("\${remote.service.url}") val baseUrl: String,
+) {
     private val client by lazy { WebClient.create(baseUrl) }
 
     fun randomAvatar(delay: Long? = null): Mono<AvatarDto> =
-            client.get()
-                    .uri("/avatar?delay=${delay ?: delayCfg}")
-                    .retrieve()
-                    .bodyToMono(AvatarDto::class.java).also {
-                        logger.debug("fetch random avatar...")
-                    }
+        client.get()
+            .uri("/avatar?delay=${delay ?: delayCfg}")
+            .retrieve()
+            .bodyToMono(AvatarDto::class.java).also {
+                logger.debug("fetch random avatar...")
+            }
 
     companion object {
         val logger = LoggerFactory.getLogger(ReactorAvatarService::class.java)
     }
-
 }
 
 @Component
-class ReactorEnrollmentService(@Value("\${remote.service.delay.ms}") val delayCfg: Long,
-                               @Value("\${remote.service.url}") val baseUrl: String) {
-
+class ReactorEnrollmentService(
+    @Value("\${remote.service.delay.ms}") val delayCfg: Long,
+    @Value("\${remote.service.url}") val baseUrl: String,
+) {
     private val client by lazy { WebClient.create(baseUrl) }
 
-    fun verifyEmail(email: String, delay: Long? = null): Mono<Boolean> =
-            client.get()
-                    .uri("/echo?email=$email&value=true&delay=${delay ?: delayCfg}")
-                    .retrieve()
-                    .bodyToMono(String::class.java)
-                    .map { it.toBoolean() }
-                    .also {
-                        logger.debug("verify email $email...")
-                    }
+    fun verifyEmail(
+        email: String,
+        delay: Long? = null,
+    ): Mono<Boolean> =
+        client.get()
+            .uri("/echo?email=$email&value=true&delay=${delay ?: delayCfg}")
+            .retrieve()
+            .bodyToMono(String::class.java)
+            .map { it.toBoolean() }
+            .also {
+                logger.debug("verify email $email...")
+            }
 
     companion object {
         val logger = LoggerFactory.getLogger(ReactorEnrollmentService::class.java)
     }
-
-
-}
\ No newline at end of file
+}
diff --git a/src/main/kotlin/org/up/utils/Utils.kt b/src/main/kotlin/org/up/utils/Utils.kt
index 97a90dc..179ea7f 100644
--- a/src/main/kotlin/org/up/utils/Utils.kt
+++ b/src/main/kotlin/org/up/utils/Utils.kt
@@ -1,14 +1,10 @@
 package org.up.utils
 
 import org.slf4j.MDC
-import org.up.coroutines.config.MdcWebFilter
 import reactor.util.function.Tuple2
 import java.util.*
 import java.util.concurrent.CompletableFuture
 
-
-
-
 fun <T : Any> Optional<T>.toNullable(): T? {
     return if (this.isPresent) {
         this.get()
@@ -17,11 +13,12 @@ fun <T : Any> Optional<T>.toNullable(): T? {
     }
 }
 
-//======Reactor Utils ======
-operator fun <A, B>Tuple2<A, B>.component1() = this.t1
-operator fun <A, B>Tuple2<A, B>.component2() = this.t2
+// ======Reactor Utils ======
+operator fun <A, B> Tuple2<A, B>.component1() = this.t1
+
+operator fun <A, B> Tuple2<A, B>.component2() = this.t2
 
-//======CompletableFuture Utils =======
+// ======CompletableFuture Utils =======
 fun <U> supplyAsync(supplier: () -> U): CompletableFuture<U> {
     return CompletableFuture.supplyAsync(SupplierMDC(supplier))
 }
diff --git a/src/main/resources/application.properties b/src/main/resources/application.properties
deleted file mode 100644
index 6de8d2f..0000000
--- a/src/main/resources/application.properties
+++ /dev/null
@@ -1,26 +0,0 @@
-logging.level.org.springframework.data.r2dbc=WARN
-logging.level.org.springframework.web.reactive.function.client.ExchangeFunctions=WARN
-#logging.level.org.springframework.data=DEBUG
-spring.mvc.log-request-details=true
-spring.h2.console.enabled=true
-spring.datasource.driverClassName=org.h2.Driver
-spring.datasource.url=jdbc:h2:mem:testdb;DB_CLOSE_DELAY=-1;DB_CLOSE_ON_EXIT=FALSE;INIT=RUNSCRIPT FROM 'classpath:./schema.sql'
-spring.datasource.jdbc-url=${spring.datasource.url}
-spring.datasource.username=sa
-spring.datasource.password=
-spring.r2dbc.initialization-mode=always
-spring.datasource.initialization-mode=always
-
-#spring.jpa.properties.hibernate.jdbc.lob.non_contextual_creation=true
-spring.datasource.hikari.maximumPoolSize=100
-spring.jpa.database-platform=org.hibernate.dialect.H2Dialect
-#spring.jpa.database-platform=org.hibernate.dialect.PostgreSQL95Dialect
-spring.jpa.generate-ddl=false
-spring.jpa.hibernate.ddl-auto=none
-spring.jpa.show-sql=false
-#logging.level.org.hibernate.sql=debug
-
-
-#application parameters
-remote.service.url=http://localhost:8081
-remote.service.delay.ms=300
\ No newline at end of file
diff --git a/src/main/resources/application.yml b/src/main/resources/application.yml
new file mode 100644
index 0000000..61ec52e
--- /dev/null
+++ b/src/main/resources/application.yml
@@ -0,0 +1,47 @@
+logging:
+  level:
+    org:
+      springframework:
+        data:
+          r2dbc: WARN
+        web:
+          reactive:
+            function:
+              client:
+                ExchangeFunctions: WARN
+remote:
+  service:
+    delay:
+      ms: 300
+    url: http://localhost:8081
+spring:
+  datasource:
+    driverClassName: org.h2.Driver
+    hikari:
+      maximumPoolSize: 100
+      jdbc-url: ${spring.datasource.url}
+    password: ''
+    url: jdbc:h2:mem:testdb;DB_CLOSE_DELAY=-1;DB_CLOSE_ON_EXIT=FALSE;INIT=RUNSCRIPT FROM 'classpath:./schema.sql'
+    username: sa
+  h2:
+    console:
+      enabled: true
+  jpa:
+    database-platform: org.hibernate.dialect.H2Dialect
+    generate-ddl: false
+    hibernate:
+      ddl-auto: none
+    show-sql: false
+#  mvc:
+#    log-request-details: true
+  webflux:
+    problem-details:
+      enabled: true
+#  jackson:
+#    property-naming-strategy: SNAKE_CASE
+  sql:
+    init:
+      mode: always
+  threads:
+    virtual:
+      enabled: true
diff --git a/src/main/resources/schema.sql b/src/main/resources/schema.sql
index cb6c59a..738dc0b 100644
--- a/src/main/resources/schema.sql
+++ b/src/main/resources/schema.sql
@@ -1,5 +1,3 @@
-create sequence if NOT EXISTS hibernate_sequence start 1 increment 1 cache 20;
-
 CREATE TABLE IF NOT EXISTS product (
     id BIGINT AUTO_INCREMENT PRIMARY KEY,
     name VARCHAR NOT NULL,
diff --git a/src/test/kotlin/org/up/coroutines/UserRepositoryTest.kt b/src/test/kotlin/org/up/coroutines/UserRepositoryTest.kt
index 9f073da..bc35363 100644
--- a/src/test/kotlin/org/up/coroutines/UserRepositoryTest.kt
+++ b/src/test/kotlin/org/up/coroutines/UserRepositoryTest.kt
@@ -11,19 +11,19 @@ import org.springframework.transaction.annotation.Transactional
 import org.up.coroutines.model.User
 import org.up.coroutines.repository.UserRepository
 
-
 @SpringBootTest
 @Transactional
 @ExtendWith(SpringExtension::class)
-class UserRepositoryTest @Autowired constructor(
-        val userRepository: UserRepository
-) {
-
-    @Test
-    fun `should insert new user and find it by Id`() = runBlocking{
-        val newUser = userRepository.save(User(userName = "Joe", email = "joe@home.nl"))
-        val foundUser = userRepository.findById(newUser.id!!)
-        foundUser shouldBe newUser
-
+class UserRepositoryTest
+    @Autowired
+    constructor(
+        val userRepository: UserRepository,
+    ) {
+        @Test
+        fun `should insert new user and find it by Id`() =
+            runBlocking {
+                val newUser = userRepository.save(User(userName = "Joe", email = "joe@home.nl"))
+                val foundUser = userRepository.findById(newUser.id!!)
+                foundUser shouldBe newUser
+            }
     }
-}
\ No newline at end of file
diff --git a/src/test/kotlin/org/up/coroutines/varia/Coroutines.kt b/src/test/kotlin/org/up/coroutines/varia/Coroutines.kt
index 28aea2a..bf3951b 100644
--- a/src/test/kotlin/org/up/coroutines/varia/Coroutines.kt
+++ b/src/test/kotlin/org/up/coroutines/varia/Coroutines.kt
@@ -9,22 +9,23 @@ import kotlinx.coroutines.future.future
 import java.lang.Thread.sleep
 import java.util.*
 import java.util.concurrent.CompletableFuture
+import java.util.concurrent.ExecutorService
+import java.util.concurrent.Executors
 import kotlin.concurrent.thread
 import kotlin.coroutines.resume
 import kotlin.coroutines.resumeWithException
 import kotlin.coroutines.suspendCoroutine
 import kotlin.system.measureTimeMillis
-import java.util.concurrent.Executors
-import java.util.concurrent.ExecutorService
-import kotlin.coroutines.CoroutineContext
-
 
 data class Product(val id: Int, val name: String)
 
 fun findProduct(id: Int): CompletableFuture<Product> =
-        CompletableFuture.supplyAsync { if (id == 9999) throw IllegalArgumentException("not found") else Product(id, "cool gadget") }
+    CompletableFuture.supplyAsync { if (id == 9999) throw IllegalArgumentException("not found") else Product(id, "cool gadget") }
 
-fun getRating(p: Product): CompletableFuture<Int> = CompletableFuture.supplyAsync { if (p.id > 1000) throw IllegalArgumentException("not found") else 10 }
+fun getRating(p: Product): CompletableFuture<Int> =
+    CompletableFuture.supplyAsync {
+        if (p.id > 1000) throw IllegalArgumentException("not found") else 10
+    }
 
 suspend fun findProductCoroutine(id: Int): Product {
     delay(1000)
@@ -36,7 +37,6 @@ suspend fun getRatingCoroutine(p: Product): Int {
     return 10
 }
 
-
 suspend fun temperatureIn(city: String): Int {
     delay(1000)
     return Random().nextInt(30)
@@ -44,113 +44,126 @@ suspend fun temperatureIn(city: String): Int {
 
 suspend fun temperatureInException(city: String): Int {
     delay(1000)
-    return if (city == "???")
+    return if (city == "???") {
         throw IllegalArgumentException("??? does not exist")
-    else Random().nextInt(30)
+    } else {
+        Random().nextInt(30)
+    }
 }
 
-
 fun temperatureInFuture(city: String): CompletableFuture<Int> =
-        CompletableFuture.supplyAsync {
-            Thread.sleep(1000)
-            Random().nextInt(30)
-        }
-
+    CompletableFuture.supplyAsync {
+        Thread.sleep(1000)
+        Random().nextInt(30)
+    }
 
-fun memoryUsageCoroutines() = runBlocking {
-    val cr = (1..2_400_000).toList().map {
-        async {
-            if (it % 100000 == 0) println("$it")
-            repeat(1000) {
-                //print(".")
-                delay(500)
+fun memoryUsageCoroutines() =
+    runBlocking {
+        val cr =
+            (1..2_400_000).toList().map {
+                async {
+                    if (it % 100000 == 0) println("$it")
+                    repeat(1000) {
+                        // print(".")
+                        delay(500)
+                    }
+                }
             }
-        }
+        cr.forEach { it.await() }
+        println("\ndone")
+        Thread.sleep(600000)
     }
-    cr.forEach { it.await() }
-    println("\ndone")
-    Thread.sleep(600000)
 
-}
-
-
-fun playThread(note: String, elapse: Long = 100, rep: Int = 50) = repeat(rep) {
+fun playThread(
+    note: String,
+    elapse: Long = 100,
+    rep: Int = 50,
+) = repeat(rep) {
     sleep(elapse)
     println("${Thread.currentThread().name}: $note")
 }
 
-suspend fun play(note: String, elapse: Long = 100, rep: Int = 50) = repeat(rep) {
+suspend fun play(
+    note: String,
+    elapse: Long = 100,
+    rep: Int = 50,
+) = repeat(rep) {
     delay(elapse)
     println("${Thread.currentThread().name}: $note")
 }
 
 fun myFirstThread() {
-    val thread = thread {
-        sleep(100)
-        println("Hi")
-    }
+    val thread =
+        thread {
+            sleep(100)
+            println("Hi")
+        }
     println("Bonjour")
     thread.join()
 }
 
 fun mySecondThreads() {
-    val thread = (1..1_000_000).toList().map {
-        thread {
-            if (it % 1000 == 0) println("Created $it threads")
-            sleep(10000)
-            print(".")
+    val thread =
+        (1..1_000_000).toList().map {
+            thread {
+                if (it % 1000 == 0) println("Created $it threads")
+                sleep(10000)
+                print(".")
+            }
         }
-    }
     thread.forEach { it.join() }
 }
 
 suspend fun myFirstCoroutine() {
-    val job = GlobalScope.launch {
-        delay(100)
-        println("Hi")
-    }
+    val job =
+        GlobalScope.launch {
+            delay(100)
+            println("Hi")
+        }
     println("Bonjour")
     job.join()
 }
 
-suspend fun mySecondCoroutine() = coroutineScope {
-    val jobs = (1..1_000_000).toList().map {
-        launch {
-            if (it % 1000 == 0) println("Created $it coroutines")
-            delay(10000)
-            print(".")
-        }
+suspend fun mySecondCoroutine() =
+    coroutineScope {
+        val jobs =
+            (1..1_000_000).toList().map {
+                launch {
+                    if (it % 1000 == 0) println("Created $it coroutines")
+                    delay(10000)
+                    print(".")
+                }
+            }
+        // jobs.forEach { it.join() }
     }
-    //jobs.forEach { it.join() }
-}
-
 
-suspend fun <T> CompletableFuture<T>.await2(): T = suspendCoroutine { cont ->
-    whenComplete { value, exception ->
-        when {
-            exception != null -> cont.resumeWithException(exception)
-            else -> cont.resume(value)
+suspend fun <T> CompletableFuture<T>.await2(): T =
+    suspendCoroutine { cont ->
+        whenComplete { value, exception ->
+            when {
+                exception != null -> cont.resumeWithException(exception)
+                else -> cont.resume(value)
+            }
         }
     }
-}
-
 
 fun futureExample() {
     GlobalScope.launch(Unconfined) {
-        //coroutineScope {
-        val future = future {
-            println("start")
-            val x = findProduct(10).await2()
-            println("got '$x'")
-            val y = getRating(x).await()
-            println("got '$y' after '$x'")
-            y
-        }
+        // coroutineScope {
+        val future =
+            future {
+                println("start")
+                val x = findProduct(10).await2()
+                println("got '$x'")
+                val y = getRating(x).await()
+                println("got '$y' after '$x'")
+                y
+            }
         val r = future.await()
         println("$r")
     }
 }
-//}
+// }
 
 fun futureExample2() {
     runBlocking {
@@ -161,199 +174,208 @@ fun futureExample2() {
     }
 }
 
-
 fun futureExampleTemperature() {
-
-
     runBlocking {
-        val time = measureTimeMillis {
-            val future = GlobalScope.future {
-                val ams = temperatureInFuture("Amsterdam")
-                val zrh = temperatureInFuture("Zurich")
-                "The answer is ams: ${ams.await()} zrh: ${zrh.await()}"
-
+        val time =
+            measureTimeMillis {
+                val future =
+                    GlobalScope.future {
+                        val ams = temperatureInFuture("Amsterdam")
+                        val zrh = temperatureInFuture("Zurich")
+                        "The answer is ams: ${ams.await()} zrh: ${zrh.await()}"
+                    }
+                println(future.await())
             }
-            println(future.await())
-
-        }
         println("Completed in $time ms")
     }
 }
 
 fun futureExampleTemperature2() {
     runBlocking {
-        val time = measureTimeMillis {
-            val ams = temperatureInFuture("Amsterdam")
-            val zrh = temperatureInFuture("Zurich")
-            "The answer is ams: ${ams.await()} zrh: ${zrh.await()}"
-        }
+        val time =
+            measureTimeMillis {
+                val ams = temperatureInFuture("Amsterdam")
+                val zrh = temperatureInFuture("Zurich")
+                "The answer is ams: ${ams.await()} zrh: ${zrh.await()}"
+            }
 
         println("Completed in $time ms")
     }
 }
 
-
 fun coRoutineExampleTemperature() {
     runBlocking {
-        val time = measureTimeMillis {
-            val ams = async { temperatureIn("Amsterdam") }
-            val zrh = async { temperatureIn("Zurich") }
-            println("The answer is ams: ${ams.await()} zrh: ${zrh.await()}")
-
-        }
+        val time =
+            measureTimeMillis {
+                val ams = async { temperatureIn("Amsterdam") }
+                val zrh = async { temperatureIn("Zurich") }
+                println("The answer is ams: ${ams.await()} zrh: ${zrh.await()}")
+            }
         println("Completed in $time ms")
     }
 }
 
 fun coRoutineExampleTemperatureException() {
     runBlocking {
-        val time = measureTimeMillis {
-            try {
-                val ams = async { temperatureInException("???") }
-                val zrh = async { temperatureInException("Zurich") }
-                println("The answer is ams: ${ams.await()} zrh: ${zrh.await()}")
-            } catch (ex: Exception) {
-                println("Oeps ${ex.message}")
+        val time =
+            measureTimeMillis {
+                try {
+                    val ams = async { temperatureInException("???") }
+                    val zrh = async { temperatureInException("Zurich") }
+                    println("The answer is ams: ${ams.await()} zrh: ${zrh.await()}")
+                } catch (ex: Exception) {
+                    println("Oeps ${ex.message}")
+                }
             }
-
-        }
         println("Completed in $time ms")
     }
 }
 
-
 fun coRoutineExample() {
-    val exceptionHandler = CoroutineExceptionHandler { coroutineContext, throwable ->
-        println(throwable)
-    }
+    val exceptionHandler =
+        CoroutineExceptionHandler { coroutineContext, throwable ->
+            println(throwable)
+        }
 
-    val job = GlobalScope.launch(Dispatchers.Default + exceptionHandler) {
-        val time = measureTimeMillis {
-            val rating = async {
-                val product = findProductCoroutine(1000)
-                getRatingCoroutine(product)
-            }
-            println("The answer is ${rating.await()}")
+    val job =
+        GlobalScope.launch(Dispatchers.Default + exceptionHandler) {
+            val time =
+                measureTimeMillis {
+                    val rating =
+                        async {
+                            val product = findProductCoroutine(1000)
+                            getRatingCoroutine(product)
+                        }
+                    println("The answer is ${rating.await()}")
+                }
+            println("Completed in $time ms")
         }
-        println("Completed in $time ms")
-    }
     runBlocking {
         job.join()
     }
 }
 
-
 fun coRoutineSequentalExample() {
-    val exceptionHandler = CoroutineExceptionHandler { coroutineContext, throwable ->
-        println(throwable)
-    }
-    runBlocking {
-        val job = launch(context = exceptionHandler) {
-            val product = findProductCoroutine(1000)
-            val rating = getRatingCoroutine(product)
-            println("$product has rating: $rating")
+    val exceptionHandler =
+        CoroutineExceptionHandler { coroutineContext, throwable ->
+            println(throwable)
         }
+    runBlocking {
+        val job =
+            launch(context = exceptionHandler) {
+                val product = findProductCoroutine(1000)
+                val rating = getRatingCoroutine(product)
+                println("$product has rating: $rating")
+            }
 
         println("done")
     }
 }
 
-suspend fun sendReceive(id: Int = 0,  channel:Channel<String>):Unit = coroutineScope{
-    val msg = "${this.coroutineContext[CoroutineName.Key]} send msg ${id+1}"
-    channel.send(msg)
-    println(msg)
-    delay(500)
-    val received = channel.receive()
-    println("${this.coroutineContext[CoroutineName.Key]} received=[$received]")
-    sendReceive(id + 1, channel)
-}
+suspend fun sendReceive(
+    id: Int = 0,
+    channel: Channel<String>,
+): Unit =
+    coroutineScope {
+        val msg = "${this.coroutineContext[CoroutineName.Key]} send msg ${id + 1}"
+        channel.send(msg)
+        println(msg)
+        delay(500)
+        val received = channel.receive()
+        println("${this.coroutineContext[CoroutineName.Key]} received=[$received]")
+        sendReceive(id + 1, channel)
+    }
 
-suspend fun send(channel:Channel<String>, msg:String) = coroutineScope{
+suspend fun send(
+    channel: Channel<String>,
+    msg: String,
+) = coroutineScope {
     val msg = "${Thread.currentThread().name} $msg"
     channel.send(msg)
     println(msg)
     delay(500)
 }
 
+suspend fun receive(channel: Channel<String>) =
+    coroutineScope {
+        val received = channel.receive()
+        println("${Thread.currentThread().name} received=[$received]")
+    }
 
-suspend fun receive(channel:Channel<String>) = coroutineScope{
-    val received = channel.receive()
-    println("${Thread.currentThread().name} received=[$received]")
-}
-
-
-
-suspend fun pingPong() = coroutineScope{
-    val channel = Channel<String>()
+suspend fun pingPong() =
+    coroutineScope {
+        val channel = Channel<String>()
 
-    launch {
-        suspend fun pongPing() {
-            receive(channel)
-            send(channel, "Pong")
+        launch {
+            suspend fun pongPing() {
+                receive(channel)
+                send(channel, "Pong")
+                pongPing()
+            }
             pongPing()
         }
-        pongPing()
-    }
-    val v1 = GlobalScope.launch {
-        suspend fun pingPong() {
-            send(channel, "Ping")
-            receive(channel)
-            pingPong()
-        }
-        pingPong()
+        val v1 =
+            GlobalScope.launch {
+                suspend fun pingPong() {
+                    send(channel, "Ping")
+                    receive(channel)
+                    pingPong()
+                }
+                pingPong()
+            }
+        // v1.join()
     }
-    //v1.join()
-
-
-}
-suspend fun simpleChannel() = coroutineScope{
-    val channel = Channel<String>()
-    launch {
-        println("Send: Rabbit")
-        channel.send("Rabbit")
-        delay(500)
-        println("Send: Bear")
-        channel.send("Bear")
-        channel.close()
 
+suspend fun simpleChannel() =
+    coroutineScope {
+        val channel = Channel<String>()
+        launch {
+            println("Send: Rabbit")
+            channel.send("Rabbit")
+            delay(500)
+            println("Send: Bear")
+            channel.send("Bear")
+            channel.close()
+        }
+        channel.consumeEach { println("Turtle meets: $it") }
     }
-    channel.consumeEach { println("Turtle meets: ${it}") }
-}
 
-suspend fun receiveAll() =  coroutineScope{
-    val channel = Channel<String>()
-    launch {
-        channel.send("Rabbit")
-        delay(500)
-        channel.send("Bear")
-        delay(500)
-        channel.close()
-    }
-    channel.consumeEach { println("Turtle meets: ${it}") }
+suspend fun receiveAll() =
+    coroutineScope {
+        val channel = Channel<String>()
+        launch {
+            channel.send("Rabbit")
+            delay(500)
+            channel.send("Bear")
+            delay(500)
+            channel.close()
+        }
+        channel.consumeEach { println("Turtle meets: $it") }
 //    repeat (2) {
 //        println("Turtle meets: ${channel.receive()}")
 //    }
-}
-
-suspend fun broadcast() =  coroutineScope{
-    val channel = BroadcastChannel<String>(Channel.CONFLATED)
-    launch {
-        channel.send("Rabbit")
-        delay(500)
-        channel.close()
     }
-    launch {
-        channel.openSubscription().consumeEach { println("Turtle 1 meets: ${it}") }
-    }
-    launch {
-        channel.openSubscription().consumeEach { println("Turtle 2 meets: ${it}") }
-    }
-    val args = arrayOf("")
-    GlobalScope.produce { args.forEach{send(it)} }
-}
 
+suspend fun broadcast() =
+    coroutineScope {
+        val channel = BroadcastChannel<String>(Channel.CONFLATED)
+        launch {
+            channel.send("Rabbit")
+            delay(500)
+            channel.close()
+        }
+        launch {
+            channel.openSubscription().consumeEach { println("Turtle 1 meets: $it") }
+        }
+        launch {
+            channel.openSubscription().consumeEach { println("Turtle 2 meets: $it") }
+        }
+        val args = arrayOf("")
+        GlobalScope.produce { args.forEach { send(it) } }
+    }
 
-fun simpleFlow() = flow{
+fun simpleFlow() =
+    flow {
         emit("~ Go with ")
         delay(1000L)
         emit("the Flow ~")
@@ -362,32 +384,28 @@ fun simpleFlow() = flow{
         .onCompletion { println("Flow completed") }
         .catch { ex -> println("Exception message: ${ex.message}") }
 
+fun main(args: Array<String>): Unit =
+    runBlocking(Dispatchers.Default) {
+        (1..10).forEach { println(it) }
+        simpleFlow().collect {
+            print(it)
+        }
 
+        // broadcast()
+        // pingPong()
 
-fun main(args: Array<String>): Unit = runBlocking(Dispatchers.Default) {
-    (1..10).forEach{println(it)}
-    simpleFlow().collect{
-        print(it)
-    }
-
-
-    //broadcast()
-    //pingPong()
-
-
-    //doIt_A()
-    //    myFirstThread()
-//mySecondThreads()
-    //mySecondCoroutine()
+        // doIt_A()
+        //    myFirstThread()
+// mySecondThreads()
+        // mySecondCoroutine()
 
-    //memoryUsageCoroutines()
+        // memoryUsageCoroutines()
 //    futureExample2()
 //    coRoutineSequentalExample()
 //    futureExampleTemperature()
 //    coRoutineExampleTemperatureException()
-    //coRoutineExampleTemperature()
-
-}
+        // coRoutineExampleTemperature()
+    }
 
 class CurrencyService(val returnRate: Int, val latency: Long) {
     suspend fun rateUSD(): Int {
@@ -401,70 +419,76 @@ class CurrencyService(val returnRate: Int, val latency: Long) {
     }
 }
 
-
 val serviceBankA = CurrencyService(120, 1000)
 val serviceBankB = CurrencyService(123, 2000)
 val serviceBankC = CurrencyService(125, 3000)
 val servicesBankABC = listOf(serviceBankA, serviceBankB, serviceBankC)
 
-
-suspend fun doIt_A() = coroutineScope {
-    val ctx = newSingleThreadContext("single-threaded-context")
-    val executorService =  ctx.executor as ExecutorService
-
-    //Threads
-    println("multiple threads threaded")
-    val r0 = measureTimeMillis {
-        val threads = servicesBankABC.map {
-            thread {
-                it.rateEUR()
-                println(Thread.currentThread().name)
+suspend fun doIt_A() =
+    coroutineScope {
+        val ctx = newSingleThreadContext("single-threaded-context")
+        val executorService = ctx.executor as ExecutorService
+
+        // Threads
+        println("multiple threads threaded")
+        val r0 =
+            measureTimeMillis {
+                val threads =
+                    servicesBankABC.map {
+                        thread {
+                            it.rateEUR()
+                            println(Thread.currentThread().name)
+                        }
+                    }
+                threads.map { it.join() }.toSet()
             }
-        }
-        threads.map { it.join() }.toSet()
-    }
-    println(r0)
-
-    //Threads
-    println("single thread threaded")
-    val r0_ = measureTimeMillis {
-        val threads = executorService.invokeAll(
-                servicesBankABC.map {
-                    Executors.callable {
-                        it.rateEUR()
-                        println(Thread.currentThread().name)
+        println(r0)
+
+        // Threads
+        println("single thread threaded")
+        val r0_ =
+            measureTimeMillis {
+                val threads =
+                    executorService.invokeAll(
+                        servicesBankABC.map {
+                            Executors.callable {
+                                it.rateEUR()
+                                println(Thread.currentThread().name)
+                            }
+                        },
+                    )
+                threads.map { it.get() }.toSet()
+            }
+        println(r0_)
+
+        println("coroutines")
+        val r1 =
+            measureTimeMillis {
+                val jobs =
+                    servicesBankABC.map {
+                        launch(ctx) {
+                            it.rateUSD()
+                            println(Thread.currentThread().name)
+                        }
                     }
-                })
-        threads.map { it.get() }.toSet()
-    }
-    println(r0_)
-
-    println("coroutines")
-    val r1 = measureTimeMillis {
-        val jobs = servicesBankABC.map {
-            launch(ctx) {
-                it.rateUSD()
-                println(Thread.currentThread().name)
+                jobs.map { it.join() }.toSet()
             }
-        }
-        jobs.map { it.join() }.toSet()
+        println(r1)
     }
-    println(r1)
-}
 
-
-
-suspend fun doIt(): Unit {
+suspend fun doIt() {
     coroutineScope {
         //        launch(Dispatchers.Default) {
-        val ms = measureTimeMillis {
-            val rates = servicesBankABC.map { async { it.rateUSD() } }
-            val avg = rates.map {
-                println("${Thread.currentThread().name}")
-                it.await()
-            }.sum() / rates.size
-            println("${Thread.currentThread().name} - avg: $avg")
-        }
+        val ms =
+            measureTimeMillis {
+                val rates = servicesBankABC.map { async { it.rateUSD() } }
+                val avg =
+                    rates.map {
+                        println("${Thread.currentThread().name}")
+                        it.await()
+                    }.sum() / rates.size
+                println("${Thread.currentThread().name} - avg: $avg")
+            }
         println(ms)
 //        }
     }
diff --git a/src/test/kotlin/org/up/coroutines/varia/ProductHandlerTest.kt b/src/test/kotlin/org/up/coroutines/varia/ProductHandlerTest.kt
index fa53e18..43d00ee 100644
--- a/src/test/kotlin/org/up/coroutines/varia/ProductHandlerTest.kt
+++ b/src/test/kotlin/org/up/coroutines/varia/ProductHandlerTest.kt
@@ -1,37 +1,37 @@
 package org.up.coroutines.varia
 
-import org.up.coroutines.handlers.ProductsHandler
-import org.up.coroutines.model.Product
-import org.up.coroutines.repository.ProductRepositoryCoroutines
 import kotlinx.coroutines.FlowPreview
 import kotlinx.coroutines.delay
 import kotlinx.coroutines.flow.*
 import kotlinx.coroutines.reactive.asFlow
 import kotlinx.coroutines.runBlocking
 import kotlinx.coroutines.withTimeoutOrNull
-import org.junit.Test
-import org.junit.runner.RunWith
+import org.junit.jupiter.api.Test
+import org.junit.jupiter.api.extension.ExtendWith
 import org.mockito.BDDMockito.given
 import org.springframework.beans.factory.annotation.Autowired
 import org.springframework.boot.autoconfigure.security.reactive.ReactiveSecurityAutoConfiguration
 import org.springframework.boot.autoconfigure.security.reactive.ReactiveUserDetailsServiceAutoConfiguration
 import org.springframework.boot.test.autoconfigure.web.reactive.WebFluxTest
 import org.springframework.boot.test.mock.mockito.MockBean
+import org.springframework.test.context.ContextConfiguration
+import org.springframework.test.context.junit.jupiter.SpringExtension
 import org.springframework.test.context.junit4.SpringRunner
 import org.springframework.test.web.reactive.server.WebTestClient
 import org.springframework.test.web.reactive.server.expectBodyList
 import org.springframework.web.reactive.function.client.WebClient
-import reactor.core.publisher.Flux
-import org.springframework.test.context.ContextConfiguration
+import org.up.coroutines.handlers.ProductsHandler
 import org.up.coroutines.handlers.RouterConfiguration
+import org.up.coroutines.model.Product
+import org.up.coroutines.repository.ProductRepositoryCoroutines
+import reactor.core.publisher.Flux
 
 @WebFluxTest(
-    excludeAutoConfiguration = [ReactiveUserDetailsServiceAutoConfiguration::class, ReactiveSecurityAutoConfiguration::class]
+    excludeAutoConfiguration = [ReactiveUserDetailsServiceAutoConfiguration::class, ReactiveSecurityAutoConfiguration::class],
 )
-@RunWith(SpringRunner::class)
+@ExtendWith(SpringExtension::class)
 @ContextConfiguration(classes = [ProductsHandler::class, RouterConfiguration::class])
 class ProductHandlerTest {
-
     @Autowired
     private lateinit var client: WebTestClient
 
@@ -41,22 +41,22 @@ class ProductHandlerTest {
     @MockBean
     private lateinit var productsRepository: ProductRepositoryCoroutines
 
-
     @FlowPreview
     @Test
     public fun `get all products`() {
-        val productsFlow = Flux.just(
+        val productsFlow =
+            Flux.just(
                 Product(1, "product1", 1000),
                 Product(2, "product2", 2000),
-                Product(3, "product3", 3000)
-        ).asFlow()
+                Product(3, "product3", 3000),
+            ).asFlow()
         given(productsRepository.getAllProducts()).willReturn(productsFlow)
         client.get()
-          .uri("/")
-          .exchange()
-          .expectStatus()
-          .isOk
-          .expectBodyList<Product>()
+            .uri("/products")
+            .exchange()
+            .expectStatus()
+            .isOk
+            .expectBodyList<Product>()
     }
 
 //    @Test
@@ -65,16 +65,16 @@ class ProductHandlerTest {
 //        productsRepository.addNewProduct(product.name, product.price)
 //    }
 
-
     @Test
     fun `flow sample 1`() {
-        fun foo(): Flow<Int> = flow {
-            println("Flow started")
-            for (i in 1..3) {
-                delay(1000)
-                emit(i)
+        fun foo(): Flow<Int> =
+            flow {
+                println("Flow started")
+                for (i in 1..3) {
+                    delay(1000)
+                    emit(i)
+                }
             }
-        }
 
         suspend fun performRequest(request: Int): String {
             delay(1000) // imitate long-running asynchronous work
@@ -88,18 +88,16 @@ class ProductHandlerTest {
             println("Calling collect again...")
             flow.collect { value -> println(value) }
 
-
             withTimeoutOrNull(250) { // Timeout after 250ms
                 foo().collect { value -> println(value) }
             }
 
             (1..3).asFlow() // a flow of requests
-                    .transform { request ->
-                        emit("abc")
-                        emit(performRequest(request)) }
-                    .collect { response -> println(response) }
-
+                .transform { request ->
+                    emit("abc")
+                    emit(performRequest(request))
+                }
+                .collect { response -> println(response) }
         }
     }
-
 }
diff --git a/src/test/kotlin/org/up/coroutines/varia/Samples.kt b/src/test/kotlin/org/up/coroutines/varia/Samples.kt
index 011ed08..cd6721f 100644
--- a/src/test/kotlin/org/up/coroutines/varia/Samples.kt
+++ b/src/test/kotlin/org/up/coroutines/varia/Samples.kt
@@ -7,27 +7,27 @@ import org.up.coroutines.model.User
 import java.util.*
 import kotlin.math.absoluteValue
 
-
 data class Users(
-                val userName: String,
-                val email: String)
-fun main() {
+    val userName: String,
+    val email: String,
+)
 
+fun main() {
     val mapper = ObjectMapper()
-            mapper.registerKotlinModule()
-   println(mapper.writeValueAsString(User(null, "Jack", "Rabbit")))
-println(mapper.readValue<User>("""{"firstName":"Jack","lastName":"Rabbit"}"""))
+    mapper.registerKotlinModule()
+    println(mapper.writeValueAsString(User(null, "Jack", "Rabbit")))
+    println(mapper.readValue<User>("""{"firstName":"Jack","lastName":"Rabbit"}"""))
 
-    fun getItem():Int? =
-            (Random().nextInt().absoluteValue % 5).run {
-                if (this != 0) this else null
-            }
+    fun getItem(): Int? =
+        (Random().nextInt().absoluteValue % 5).run {
+            if (this != 0) this else null
+        }
 
-    val i:Int? = null
-    val seq:Sequence<Int?> = generateSequence(3){getItem()}
-    fun take() =seq.takeWhile { it != null }.forEach { print(it.toString()) }.also {  println("") }
+    val i: Int? = null
+    val seq: Sequence<Int?> = generateSequence(3) { getItem() }
+
+    fun take() = seq.takeWhile { it != null }.forEach { print(it.toString()) }.also { println("") }
 
     take()
     take()
 }
-
diff --git a/src/test/kotlin/org/up/reactor/ReactorUserRepositoryTest.kt b/src/test/kotlin/org/up/reactor/ReactorUserRepositoryTest.kt
index 82328ea..8737d83 100644
--- a/src/test/kotlin/org/up/reactor/ReactorUserRepositoryTest.kt
+++ b/src/test/kotlin/org/up/reactor/ReactorUserRepositoryTest.kt
@@ -1,6 +1,6 @@
 package org.up.reactor
 
-
+import io.kotlintest.shouldBe
 import org.junit.jupiter.api.Test
 import org.junit.jupiter.api.extension.ExtendWith
 import org.springframework.beans.factory.annotation.Autowired
@@ -10,27 +10,26 @@ import org.springframework.transaction.annotation.Transactional
 import org.up.coroutines.model.User
 import org.up.reactor.repository.ReactorUserRepository
 import reactor.test.StepVerifier
-import io.kotlintest.shouldBe
 
 @SpringBootTest
 @Transactional
 @ExtendWith(SpringExtension::class)
-class ReactorUserRepositoryTest @Autowired constructor(
-        val reactorUserRepository: ReactorUserRepository
-) {
-
-    @Test
-    fun `should insert new user and find it by Id`() {
-        val newUser = reactorUserRepository.save(User(userName = "Joe", email = "joe@home.nl"))
-        StepVerifier.create(newUser)
+class ReactorUserRepositoryTest
+    @Autowired
+    constructor(
+        val reactorUserRepository: ReactorUserRepository,
+    ) {
+        @Test
+        fun `should insert new user and find it by Id`() {
+            val newUser = reactorUserRepository.save(User(userName = "Joe", email = "joe@home.nl"))
+            StepVerifier.create(newUser)
                 .expectNextCount(1)
                 .expectComplete()
                 .verify()
-        val foundUser = reactorUserRepository.findById(newUser.block()?.id!!)
-        StepVerifier.create(foundUser)
+            val foundUser = reactorUserRepository.findById(newUser.block()?.id!!)
+            StepVerifier.create(foundUser)
                 .assertNext { user -> user.userName shouldBe newUser.block()!!.userName }
                 .expectComplete()
                 .verify()
+        }
     }
-
-}
\ No newline at end of file
diff --git a/versions.properties b/versions.properties
new file mode 100644
index 0000000..aab990f
--- /dev/null
+++ b/versions.properties
@@ -0,0 +1,10 @@
+#### Dependencies and Plugin versions with their available updates.
+#### Generated by `./gradlew refreshVersions` version 0.60.5
+####
+#### Don't manually edit or split the comments that start with four hashtags (####),
+#### they will be overwritten by refreshVersions.
+####
+#### suppress inspection "SpellCheckingInspection" for whole file
+#### suppress inspection "UnusedProperty" for whole file
+####
+#### NOTE: Some versions are filtered by the rejectVersionIf predicate. See the settings.gradle.kts file.