From 636a1440ee7225e8703740181d23a5631d999bd0 Mon Sep 17 00:00:00 2001 From: asyifa zahwa Date: Fri, 24 Apr 2026 10:19:57 +0700 Subject: [PATCH 1/3] feat: implement IDR rate aggregator --- .DS_Store | Bin 0 -> 6148 bytes .gitattributes | 2 + .gitignore | 33 ++ .mvn/wrapper/maven-wrapper.properties | 3 + README.md | 161 +++------- mvnw | 295 ++++++++++++++++++ mvnw.cmd | 189 +++++++++++ pom.xml | 116 +++++++ .../allobank/backend/BackendApplication.java | 13 + .../backend/config/JacksonConfig.java | 14 + .../backend/config/WebClientFactoryBean.java | 43 +++ .../backend/controller/FinanceController.java | 34 ++ .../exception/GlobalExceptionHandler.java | 37 +++ .../runner/FinanceDataStartupRunner.java | 45 +++ .../backend/store/FinanceDataStore.java | 25 ++ .../backend/strategy/FinanceDataStrategy.java | 8 + .../backend/strategy/HistoricalIdrUsd.java | 32 ++ .../strategy/LatestIdrRatesStrategy.java | 55 ++++ .../backend/strategy/SupportedCurrencies.java | 31 ++ src/main/resources/application.properties | 2 + .../backend/BackendApplicationTests.java | 13 + .../runner/FinanceDataStartupRunnerTest.java | 24 ++ .../strategy/LatestIdrRatesStrategyTest.Java | 57 ++++ 23 files changed, 1112 insertions(+), 120 deletions(-) create mode 100644 .DS_Store create mode 100644 .gitattributes create mode 100644 .gitignore create mode 100644 .mvn/wrapper/maven-wrapper.properties create mode 100755 mvnw create mode 100644 mvnw.cmd create mode 100644 pom.xml create mode 100644 src/main/java/com/allobank/backend/BackendApplication.java create mode 100644 src/main/java/com/allobank/backend/config/JacksonConfig.java create mode 100644 src/main/java/com/allobank/backend/config/WebClientFactoryBean.java create mode 100644 src/main/java/com/allobank/backend/controller/FinanceController.java create mode 100644 src/main/java/com/allobank/backend/exception/GlobalExceptionHandler.java create mode 100644 src/main/java/com/allobank/backend/runner/FinanceDataStartupRunner.java create mode 100644 src/main/java/com/allobank/backend/store/FinanceDataStore.java create mode 100644 src/main/java/com/allobank/backend/strategy/FinanceDataStrategy.java create mode 100644 src/main/java/com/allobank/backend/strategy/HistoricalIdrUsd.java create mode 100644 src/main/java/com/allobank/backend/strategy/LatestIdrRatesStrategy.java create mode 100644 src/main/java/com/allobank/backend/strategy/SupportedCurrencies.java create mode 100644 src/main/resources/application.properties create mode 100644 src/test/java/com/allobank/backend/BackendApplicationTests.java create mode 100644 src/test/java/com/allobank/backend/runner/FinanceDataStartupRunnerTest.java create mode 100644 src/test/java/com/allobank/backend/strategy/LatestIdrRatesStrategyTest.Java diff --git a/.DS_Store b/.DS_Store new file mode 100644 index 0000000000000000000000000000000000000000..7e76486f237faac1d74e9841abdee88ac0fcedaf GIT binary patch literal 6148 zcmeHK%TB{E5FED^6mjX1qrZTNKM1AV5SI$hv`vMgrU^<@5Vw3fv-Y;?iz`CauCyL| zcGq?$QXB(t!*zBC3;^`$f}JZiCrskvN7hm1g6L$9Y&9#URaG2i8u4EhkayR^E#8r% z*?oUPF7b(Sm%PLj6U?x{93`?%h%X-pp^s+zv|cqeBM%tk8!I#{S|Y(KDim0=KPQ`D z#3>tkf)|eGr~@leiB()K=9bKo{G3b6Ts3!>6TjfYctJkr)+U@i!9Cl8)kBU;vdPIk zKIn$8Q^htSBQzIFiLun_6~o1H@?P^&#WrFrhttc4)0LgxP+VA@^ZSqv zmqxVK6fgz$73jv{K+gZi-|zqXMK&@8Oo6jf!1YGs(U6a%XY0|!$yw{^Z*(!qYa?z; j*a=55bLA+$p$8-Hr9(^=+lXXn_9GBvu*MYlQw4qiv)D?@ literal 0 HcmV?d00001 diff --git a/.gitattributes b/.gitattributes new file mode 100644 index 00000000..3b41682a --- /dev/null +++ b/.gitattributes @@ -0,0 +1,2 @@ +/mvnw text eol=lf +*.cmd text eol=crlf diff --git a/.gitignore b/.gitignore new file mode 100644 index 00000000..667aaef0 --- /dev/null +++ b/.gitignore @@ -0,0 +1,33 @@ +HELP.md +target/ +.mvn/wrapper/maven-wrapper.jar +!**/src/main/**/target/ +!**/src/test/**/target/ + +### STS ### +.apt_generated +.classpath +.factorypath +.project +.settings +.springBeans +.sts4-cache + +### IntelliJ IDEA ### +.idea +*.iws +*.iml +*.ipr + +### NetBeans ### +/nbproject/private/ +/nbbuild/ +/dist/ +/nbdist/ +/.nb-gradle/ +build/ +!**/src/main/**/build/ +!**/src/test/**/build/ + +### VS Code ### +.vscode/ diff --git a/.mvn/wrapper/maven-wrapper.properties b/.mvn/wrapper/maven-wrapper.properties new file mode 100644 index 00000000..c595b009 --- /dev/null +++ b/.mvn/wrapper/maven-wrapper.properties @@ -0,0 +1,3 @@ +wrapperVersion=3.3.4 +distributionType=only-script +distributionUrl=https://repo.maven.apache.org/maven2/org/apache/maven/apache-maven/3.9.14/apache-maven-3.9.14-bin.zip diff --git a/README.md b/README.md index 5e58ae2a..906eddc9 100644 --- a/README.md +++ b/README.md @@ -1,139 +1,60 @@ -# Allo Bank Backend Developer Take-Home Test +# Finance Data Aggregator API -Thank you for applying to our team! This take-home test is designed to evaluate your practical skills in building **production-ready** Spring Boot applications within a finance domain, focusing on architectural patterns and complex data handling. +A production-ready Spring Boot Reactive API that aggregates and transforms currency exchange data from the public Frankfurter API. Built with high performance, thread-safety, and clean architecture in mind. -## 📝 Objective +## Setup & Run Instructions -Your task is to create a single Spring Boot REST API endpoint capable of aggregating data from multiple, distinct resources provided by the public, keyless **Frankfurter Exchange Rate API**. The primary focus is on handling Indonesian Rupiah (IDR) data. -The focus of this test is not just functional correctness, but demonstrating clean code, advanced Spring concepts, thread-safe design, and architectural clarity. +**Prerequisites:** +- Java 17 or higher +- Maven 3.8+ -## I. Core Task: The Polymorphic API +**1. Clone the repository:** +```bash +git clone +cd allo-backend-test +``` -### 1. External API Integration (Frankfurter API) +**2. Build the application and run tests:** +```bash +mvn clean install +``` -* **Base URL (Public):** `https://api.frankfurter.app/`. +**3. Run Application:** +```bash +mvn spring-boot:run +``` -* You must integrate with three distinct data resources to enforce the architectural pattern: - 1. `/latest?base=IDR` (The latest rates relative to IDR) +## Endppoint Usage - 2. **Historical Data:** Query a specific, small time series (e.g., `/2024-01-01..2024-01-05?from=IDR&to=USD`). **Note:** *Use the date range provided in this example unless a different range is communicated separately.* +The application exposes a single endpoint serving data from the in-memory store. +```bash +Base URL: http://localhost:8080/api/finance/data/{resourceType} +``` +Example cURL Commands: - 3. `/currencies` (The list of all supported currency symbols) +Latest IDR Rates (with custom spread calculation): +```bash +curl -X GET http://localhost:8080/api/finance/data/latest_idr_rates +``` -### 2. Internal API Endpoint +Historical IDR to USD: +```bash +curl -X GET http://localhost:8080/api/finance/data/historical_idr_usd +``` -You must expose **one single endpoint** in your application: ```GET /api/finance/data/{resourceType}``` +Supported Currencies: +```bash +curl -X GET http://localhost:8080/api/finance/data/supported_currencies +``` -Where `{resourceType}` can be one of the three strings: `latest_idr_rates`, `historical_idr_usd`, or `supported_currencies`. +## Personalization Note +GitHub Username: [asyifa-zahwa] -### 3. Required Functionality & Business Logic +Calculated ASCII Sum: [1221] -* **Resource Handling:** Your service must correctly map the three incoming `resourceType` values to the correct data fetching strategies. +Calculated Spread Factor: [17279.48275862069] -* **Data Load:** All three resources should be fetched from the external API. -* **Data Transformation (Latest IDR Rates only) - Unique Calculation:** For the **`latest_idr_rates`** resource, you must calculate and include a new field, `"USD_BuySpread_IDR"`. This is the Rupiah selling rate to USD after applying a banking spread/margin. - **The Spread Factor Must Be Unique :** - - 1. **Input:** Your GitHub username (e.g., `johndoe47`). - 2. **Calculation:** Calculate the sum of the Unicode (ASCII) values of all characters in your lowercase GitHub username string. - 3. **Spread Factor Derivation:** `Spread Factor = (Sum of Unicode Values % 1000) / 100000.0` - *(This will yield a unique factor between 0.00000 and 0.00999, ensuring a personalized result.)* - - **Final Formula:** `USD_BuySpread_IDR = (1 / Rate_USD) * (1 + Spread Factor)` (where `Rate_USD` is the value from the API when `base=IDR`). - -* **Other Resources:** The `historical_idr_usd` and `supported_currencies` resources can return their data with minimal transformation, but the final output must be a unified JSON array of results. - -## II. Architectural Constraints - -Meeting the core task is only one part of the solution. The following constraints must be strictly adhered to and will be heavily weighted during evaluation: - -### Constraint A: The Strategy Pattern - -The logic for handling the three different resources (`latest_idr_rates`, `historical_idr_usd`, `supported_currencies`) must be implemented using the **Strategy Design Pattern**. - -1. Define a clear **Strategy Interface** (e.g., `IDRDataFetcher`). - -2. Implement **three concrete strategy classes** (one for each resource). - -3. The main `Controller` should dynamically select the correct strategy implementation using a map-based lookup injected by Spring, avoiding any manual `if/else` or `switch` logic in the controller layer. - -### Constraint B: Client Factory Bean - -The instance of your chosen external API client (`WebClient` or `RestTemplate`) **must be defined and created within a custom implementation of Spring's `FactoryBean` interface**. - -* This `FactoryBean` should be responsible for externalizing the API Base URL via `@Value` or `@ConfigurationProperties` and applying any initial configuration (e.g., timeouts, shared headers). - -* ***You may not define the client as a simple `@Bean` in a `@Configuration` class.*** - -### Constraint C: Startup Data Runner & Immutability - -The aggregated data for **ALL three resources** must be fetched **exactly once on application startup** and loaded into an in-memory store. - -1. Use a Spring Boot **`ApplicationRunner`** or **`CommandLineRunner`** component to initiate the data fetching process. - -2. The API endpoint (`GET /api/finance/data/{resourceType}`) must serve the data from this **in-memory store**, not by making a new call to the external API on every request. - -3. The in-memory storage mechanism (e.g., a service holding the data) must be designed to be **thread-safe** and ensure the data is **immutable** once the `ApplicationRunner` has finished loading it. - -## III. Production Readiness & Deliverables - -Your final solution must demonstrate production quality through code, testing, and communication. - -### 1. Robustness & Best Practices - -* Graceful **Error Handling** for network failures or 4xx/5xx responses from the external API. - -* Proper use of **Configuration Properties** (e.g., `application.yml`) for external service URLs. - -* Clear separation of concerns (Controller, Service, Model/DTO, etc.). - -### 2. Testing - -* **Unit Tests** for all three `IDRDataFetcher` strategy implementations, ensuring data calculation and transformation logic is covered (using mock clients for external calls). - -* **Integration Tests** to verify the `ApplicationRunner` successfully initializes and loads the data into the in-memory store before the application context is ready. - -### 3. Documentation - -A clear `README.md` is mandatory. It must include: - -* **Setup/Run Instructions:** Clear steps to clone, build, and run the application and tests. - -* **Endpoint Usage:** Example cURL commands to test the three different resource types. - -* **Personalization Note:** Clearly state your GitHub username and show the exact **Spread Factor** (e.g., `0.00765`) calculated by your function. - -* --- - -* ### 🛠️ Architectural Rationale - - This section should contain a brief, but detailed, explanation answering the following questions: - - 1. **Polymorphism Justification:** Explain *why* the Strategy Pattern was used over a simpler conditional block in the service layer for handling the multi-resource endpoint. Discuss the benefits in terms of **extensibility** and **maintainability**. - - 2. **Client Factory:** Explain the specific role and benefit of using a **`FactoryBean`** to construct the external API client. Why is this preferable to defining the client using a standard `@Bean` method in this scenario? - - 3. **Startup Runner Choice:** Justify the choice of using an `ApplicationRunner` (or `CommandLineRunner`) for the initial data ingestion over a simpler `@PostConstruct` method. - -## IV. Submission & Review Process - -1. **Fork** this repository. - -2. Implement your solution on a dedicated feature branch (e.g., `feat/idr-rate-aggregator`). - -3. When complete, submit your solution via a **Pull Request (PR)** back to the main repository. -4. Please complete the form to submit your technical test: [Click Here](https://forms.gle/nZKQ2EjTCPfAKHog7) - -**Your PR will be evaluated on the following:** - -* **Commit History:** Clean, atomic, and descriptive commit messages (e.g., "feat: Implement IDR latest rates strategy," "fix: Correctly calculate IDR spread in tests"). - -* **PR Description:** The description must clearly summarize the solution and **must contain the full answers** to the three "Architectural Rationale" questions from Section III. - -* **Code Review Readiness:** The code should be well-structured and ready for immediate review. - -Good luck! diff --git a/mvnw b/mvnw new file mode 100755 index 00000000..bd8896bf --- /dev/null +++ b/mvnw @@ -0,0 +1,295 @@ +#!/bin/sh +# ---------------------------------------------------------------------------- +# Licensed to the Apache Software Foundation (ASF) under one +# or more contributor license agreements. See the NOTICE file +# distributed with this work for additional information +# regarding copyright ownership. The ASF licenses this file +# to you 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 +# +# http://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. +# ---------------------------------------------------------------------------- + +# ---------------------------------------------------------------------------- +# Apache Maven Wrapper startup batch script, version 3.3.4 +# +# Optional ENV vars +# ----------------- +# JAVA_HOME - location of a JDK home dir, required when download maven via java source +# MVNW_REPOURL - repo url base for downloading maven distribution +# MVNW_USERNAME/MVNW_PASSWORD - user and password for downloading maven +# MVNW_VERBOSE - true: enable verbose log; debug: trace the mvnw script; others: silence the output +# ---------------------------------------------------------------------------- + +set -euf +[ "${MVNW_VERBOSE-}" != debug ] || set -x + +# OS specific support. +native_path() { printf %s\\n "$1"; } +case "$(uname)" in +CYGWIN* | MINGW*) + [ -z "${JAVA_HOME-}" ] || JAVA_HOME="$(cygpath --unix "$JAVA_HOME")" + native_path() { cygpath --path --windows "$1"; } + ;; +esac + +# set JAVACMD and JAVACCMD +set_java_home() { + # For Cygwin and MinGW, ensure paths are in Unix format before anything is touched + if [ -n "${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" + JAVACCMD="$JAVA_HOME/jre/sh/javac" + else + JAVACMD="$JAVA_HOME/bin/java" + JAVACCMD="$JAVA_HOME/bin/javac" + + if [ ! -x "$JAVACMD" ] || [ ! -x "$JAVACCMD" ]; then + echo "The JAVA_HOME environment variable is not defined correctly, so mvnw cannot run." >&2 + echo "JAVA_HOME is set to \"$JAVA_HOME\", but \"\$JAVA_HOME/bin/java\" or \"\$JAVA_HOME/bin/javac\" does not exist." >&2 + return 1 + fi + fi + else + JAVACMD="$( + 'set' +e + 'unset' -f command 2>/dev/null + 'command' -v java + )" || : + JAVACCMD="$( + 'set' +e + 'unset' -f command 2>/dev/null + 'command' -v javac + )" || : + + if [ ! -x "${JAVACMD-}" ] || [ ! -x "${JAVACCMD-}" ]; then + echo "The java/javac command does not exist in PATH nor is JAVA_HOME set, so mvnw cannot run." >&2 + return 1 + fi + fi +} + +# hash string like Java String::hashCode +hash_string() { + str="${1:-}" h=0 + while [ -n "$str" ]; do + char="${str%"${str#?}"}" + h=$(((h * 31 + $(LC_CTYPE=C printf %d "'$char")) % 4294967296)) + str="${str#?}" + done + printf %x\\n $h +} + +verbose() { :; } +[ "${MVNW_VERBOSE-}" != true ] || verbose() { printf %s\\n "${1-}"; } + +die() { + printf %s\\n "$1" >&2 + exit 1 +} + +trim() { + # MWRAPPER-139: + # Trims trailing and leading whitespace, carriage returns, tabs, and linefeeds. + # Needed for removing poorly interpreted newline sequences when running in more + # exotic environments such as mingw bash on Windows. + printf "%s" "${1}" | tr -d '[:space:]' +} + +scriptDir="$(dirname "$0")" +scriptName="$(basename "$0")" + +# parse distributionUrl and optional distributionSha256Sum, requires .mvn/wrapper/maven-wrapper.properties +while IFS="=" read -r key value; do + case "${key-}" in + distributionUrl) distributionUrl=$(trim "${value-}") ;; + distributionSha256Sum) distributionSha256Sum=$(trim "${value-}") ;; + esac +done <"$scriptDir/.mvn/wrapper/maven-wrapper.properties" +[ -n "${distributionUrl-}" ] || die "cannot read distributionUrl property in $scriptDir/.mvn/wrapper/maven-wrapper.properties" + +case "${distributionUrl##*/}" in +maven-mvnd-*bin.*) + MVN_CMD=mvnd.sh _MVNW_REPO_PATTERN=/maven/mvnd/ + case "${PROCESSOR_ARCHITECTURE-}${PROCESSOR_ARCHITEW6432-}:$(uname -a)" in + *AMD64:CYGWIN* | *AMD64:MINGW*) distributionPlatform=windows-amd64 ;; + :Darwin*x86_64) distributionPlatform=darwin-amd64 ;; + :Darwin*arm64) distributionPlatform=darwin-aarch64 ;; + :Linux*x86_64*) distributionPlatform=linux-amd64 ;; + *) + echo "Cannot detect native platform for mvnd on $(uname)-$(uname -m), use pure java version" >&2 + distributionPlatform=linux-amd64 + ;; + esac + distributionUrl="${distributionUrl%-bin.*}-$distributionPlatform.zip" + ;; +maven-mvnd-*) MVN_CMD=mvnd.sh _MVNW_REPO_PATTERN=/maven/mvnd/ ;; +*) MVN_CMD="mvn${scriptName#mvnw}" _MVNW_REPO_PATTERN=/org/apache/maven/ ;; +esac + +# apply MVNW_REPOURL and calculate MAVEN_HOME +# maven home pattern: ~/.m2/wrapper/dists/{apache-maven-,maven-mvnd--}/ +[ -z "${MVNW_REPOURL-}" ] || distributionUrl="$MVNW_REPOURL$_MVNW_REPO_PATTERN${distributionUrl#*"$_MVNW_REPO_PATTERN"}" +distributionUrlName="${distributionUrl##*/}" +distributionUrlNameMain="${distributionUrlName%.*}" +distributionUrlNameMain="${distributionUrlNameMain%-bin}" +MAVEN_USER_HOME="${MAVEN_USER_HOME:-${HOME}/.m2}" +MAVEN_HOME="${MAVEN_USER_HOME}/wrapper/dists/${distributionUrlNameMain-}/$(hash_string "$distributionUrl")" + +exec_maven() { + unset MVNW_VERBOSE MVNW_USERNAME MVNW_PASSWORD MVNW_REPOURL || : + exec "$MAVEN_HOME/bin/$MVN_CMD" "$@" || die "cannot exec $MAVEN_HOME/bin/$MVN_CMD" +} + +if [ -d "$MAVEN_HOME" ]; then + verbose "found existing MAVEN_HOME at $MAVEN_HOME" + exec_maven "$@" +fi + +case "${distributionUrl-}" in +*?-bin.zip | *?maven-mvnd-?*-?*.zip) ;; +*) die "distributionUrl is not valid, must match *-bin.zip or maven-mvnd-*.zip, but found '${distributionUrl-}'" ;; +esac + +# prepare tmp dir +if TMP_DOWNLOAD_DIR="$(mktemp -d)" && [ -d "$TMP_DOWNLOAD_DIR" ]; then + clean() { rm -rf -- "$TMP_DOWNLOAD_DIR"; } + trap clean HUP INT TERM EXIT +else + die "cannot create temp dir" +fi + +mkdir -p -- "${MAVEN_HOME%/*}" + +# Download and Install Apache Maven +verbose "Couldn't find MAVEN_HOME, downloading and installing it ..." +verbose "Downloading from: $distributionUrl" +verbose "Downloading to: $TMP_DOWNLOAD_DIR/$distributionUrlName" + +# select .zip or .tar.gz +if ! command -v unzip >/dev/null; then + distributionUrl="${distributionUrl%.zip}.tar.gz" + distributionUrlName="${distributionUrl##*/}" +fi + +# verbose opt +__MVNW_QUIET_WGET=--quiet __MVNW_QUIET_CURL=--silent __MVNW_QUIET_UNZIP=-q __MVNW_QUIET_TAR='' +[ "${MVNW_VERBOSE-}" != true ] || __MVNW_QUIET_WGET='' __MVNW_QUIET_CURL='' __MVNW_QUIET_UNZIP='' __MVNW_QUIET_TAR=v + +# normalize http auth +case "${MVNW_PASSWORD:+has-password}" in +'') MVNW_USERNAME='' MVNW_PASSWORD='' ;; +has-password) [ -n "${MVNW_USERNAME-}" ] || MVNW_USERNAME='' MVNW_PASSWORD='' ;; +esac + +if [ -z "${MVNW_USERNAME-}" ] && command -v wget >/dev/null; then + verbose "Found wget ... using wget" + wget ${__MVNW_QUIET_WGET:+"$__MVNW_QUIET_WGET"} "$distributionUrl" -O "$TMP_DOWNLOAD_DIR/$distributionUrlName" || die "wget: Failed to fetch $distributionUrl" +elif [ -z "${MVNW_USERNAME-}" ] && command -v curl >/dev/null; then + verbose "Found curl ... using curl" + curl ${__MVNW_QUIET_CURL:+"$__MVNW_QUIET_CURL"} -f -L -o "$TMP_DOWNLOAD_DIR/$distributionUrlName" "$distributionUrl" || die "curl: Failed to fetch $distributionUrl" +elif set_java_home; then + verbose "Falling back to use Java to download" + javaSource="$TMP_DOWNLOAD_DIR/Downloader.java" + targetZip="$TMP_DOWNLOAD_DIR/$distributionUrlName" + cat >"$javaSource" <<-END + public class Downloader extends java.net.Authenticator + { + protected java.net.PasswordAuthentication getPasswordAuthentication() + { + return new java.net.PasswordAuthentication( System.getenv( "MVNW_USERNAME" ), System.getenv( "MVNW_PASSWORD" ).toCharArray() ); + } + public static void main( String[] args ) throws Exception + { + setDefault( new Downloader() ); + java.nio.file.Files.copy( java.net.URI.create( args[0] ).toURL().openStream(), java.nio.file.Paths.get( args[1] ).toAbsolutePath().normalize() ); + } + } + END + # For Cygwin/MinGW, switch paths to Windows format before running javac and java + verbose " - Compiling Downloader.java ..." + "$(native_path "$JAVACCMD")" "$(native_path "$javaSource")" || die "Failed to compile Downloader.java" + verbose " - Running Downloader.java ..." + "$(native_path "$JAVACMD")" -cp "$(native_path "$TMP_DOWNLOAD_DIR")" Downloader "$distributionUrl" "$(native_path "$targetZip")" +fi + +# If specified, validate the SHA-256 sum of the Maven distribution zip file +if [ -n "${distributionSha256Sum-}" ]; then + distributionSha256Result=false + if [ "$MVN_CMD" = mvnd.sh ]; then + echo "Checksum validation is not supported for maven-mvnd." >&2 + echo "Please disable validation by removing 'distributionSha256Sum' from your maven-wrapper.properties." >&2 + exit 1 + elif command -v sha256sum >/dev/null; then + if echo "$distributionSha256Sum $TMP_DOWNLOAD_DIR/$distributionUrlName" | sha256sum -c - >/dev/null 2>&1; then + distributionSha256Result=true + fi + elif command -v shasum >/dev/null; then + if echo "$distributionSha256Sum $TMP_DOWNLOAD_DIR/$distributionUrlName" | shasum -a 256 -c >/dev/null 2>&1; then + distributionSha256Result=true + fi + else + echo "Checksum validation was requested but neither 'sha256sum' or 'shasum' are available." >&2 + echo "Please install either command, or disable validation by removing 'distributionSha256Sum' from your maven-wrapper.properties." >&2 + exit 1 + fi + if [ $distributionSha256Result = false ]; then + echo "Error: Failed to validate Maven distribution SHA-256, your Maven distribution might be compromised." >&2 + echo "If you updated your Maven version, you need to update the specified distributionSha256Sum property." >&2 + exit 1 + fi +fi + +# unzip and move +if command -v unzip >/dev/null; then + unzip ${__MVNW_QUIET_UNZIP:+"$__MVNW_QUIET_UNZIP"} "$TMP_DOWNLOAD_DIR/$distributionUrlName" -d "$TMP_DOWNLOAD_DIR" || die "failed to unzip" +else + tar xzf${__MVNW_QUIET_TAR:+"$__MVNW_QUIET_TAR"} "$TMP_DOWNLOAD_DIR/$distributionUrlName" -C "$TMP_DOWNLOAD_DIR" || die "failed to untar" +fi + +# Find the actual extracted directory name (handles snapshots where filename != directory name) +actualDistributionDir="" + +# First try the expected directory name (for regular distributions) +if [ -d "$TMP_DOWNLOAD_DIR/$distributionUrlNameMain" ]; then + if [ -f "$TMP_DOWNLOAD_DIR/$distributionUrlNameMain/bin/$MVN_CMD" ]; then + actualDistributionDir="$distributionUrlNameMain" + fi +fi + +# If not found, search for any directory with the Maven executable (for snapshots) +if [ -z "$actualDistributionDir" ]; then + # enable globbing to iterate over items + set +f + for dir in "$TMP_DOWNLOAD_DIR"/*; do + if [ -d "$dir" ]; then + if [ -f "$dir/bin/$MVN_CMD" ]; then + actualDistributionDir="$(basename "$dir")" + break + fi + fi + done + set -f +fi + +if [ -z "$actualDistributionDir" ]; then + verbose "Contents of $TMP_DOWNLOAD_DIR:" + verbose "$(ls -la "$TMP_DOWNLOAD_DIR")" + die "Could not find Maven distribution directory in extracted archive" +fi + +verbose "Found extracted Maven distribution directory: $actualDistributionDir" +printf %s\\n "$distributionUrl" >"$TMP_DOWNLOAD_DIR/$actualDistributionDir/mvnw.url" +mv -- "$TMP_DOWNLOAD_DIR/$actualDistributionDir" "$MAVEN_HOME" || [ -d "$MAVEN_HOME" ] || die "fail to move MAVEN_HOME" + +clean || : +exec_maven "$@" diff --git a/mvnw.cmd b/mvnw.cmd new file mode 100644 index 00000000..92450f93 --- /dev/null +++ b/mvnw.cmd @@ -0,0 +1,189 @@ +<# : batch portion +@REM ---------------------------------------------------------------------------- +@REM Licensed to the Apache Software Foundation (ASF) under one +@REM or more contributor license agreements. See the NOTICE file +@REM distributed with this work for additional information +@REM regarding copyright ownership. The ASF licenses this file +@REM to you under the Apache License, Version 2.0 (the +@REM "License"); you may not use this file except in compliance +@REM with the License. You may obtain a copy of the License at +@REM +@REM http://www.apache.org/licenses/LICENSE-2.0 +@REM +@REM Unless required by applicable law or agreed to in writing, +@REM software distributed under the License is distributed on an +@REM "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY +@REM KIND, either express or implied. See the License for the +@REM specific language governing permissions and limitations +@REM under the License. +@REM ---------------------------------------------------------------------------- + +@REM ---------------------------------------------------------------------------- +@REM Apache Maven Wrapper startup batch script, version 3.3.4 +@REM +@REM Optional ENV vars +@REM MVNW_REPOURL - repo url base for downloading maven distribution +@REM MVNW_USERNAME/MVNW_PASSWORD - user and password for downloading maven +@REM MVNW_VERBOSE - true: enable verbose log; others: silence the output +@REM ---------------------------------------------------------------------------- + +@IF "%__MVNW_ARG0_NAME__%"=="" (SET __MVNW_ARG0_NAME__=%~nx0) +@SET __MVNW_CMD__= +@SET __MVNW_ERROR__= +@SET __MVNW_PSMODULEP_SAVE=%PSModulePath% +@SET PSModulePath= +@FOR /F "usebackq tokens=1* delims==" %%A IN (`powershell -noprofile "& {$scriptDir='%~dp0'; $script='%__MVNW_ARG0_NAME__%'; icm -ScriptBlock ([Scriptblock]::Create((Get-Content -Raw '%~f0'))) -NoNewScope}"`) DO @( + IF "%%A"=="MVN_CMD" (set __MVNW_CMD__=%%B) ELSE IF "%%B"=="" (echo %%A) ELSE (echo %%A=%%B) +) +@SET PSModulePath=%__MVNW_PSMODULEP_SAVE% +@SET __MVNW_PSMODULEP_SAVE= +@SET __MVNW_ARG0_NAME__= +@SET MVNW_USERNAME= +@SET MVNW_PASSWORD= +@IF NOT "%__MVNW_CMD__%"=="" ("%__MVNW_CMD__%" %*) +@echo Cannot start maven from wrapper >&2 && exit /b 1 +@GOTO :EOF +: end batch / begin powershell #> + +$ErrorActionPreference = "Stop" +if ($env:MVNW_VERBOSE -eq "true") { + $VerbosePreference = "Continue" +} + +# calculate distributionUrl, requires .mvn/wrapper/maven-wrapper.properties +$distributionUrl = (Get-Content -Raw "$scriptDir/.mvn/wrapper/maven-wrapper.properties" | ConvertFrom-StringData).distributionUrl +if (!$distributionUrl) { + Write-Error "cannot read distributionUrl property in $scriptDir/.mvn/wrapper/maven-wrapper.properties" +} + +switch -wildcard -casesensitive ( $($distributionUrl -replace '^.*/','') ) { + "maven-mvnd-*" { + $USE_MVND = $true + $distributionUrl = $distributionUrl -replace '-bin\.[^.]*$',"-windows-amd64.zip" + $MVN_CMD = "mvnd.cmd" + break + } + default { + $USE_MVND = $false + $MVN_CMD = $script -replace '^mvnw','mvn' + break + } +} + +# apply MVNW_REPOURL and calculate MAVEN_HOME +# maven home pattern: ~/.m2/wrapper/dists/{apache-maven-,maven-mvnd--}/ +if ($env:MVNW_REPOURL) { + $MVNW_REPO_PATTERN = if ($USE_MVND -eq $False) { "/org/apache/maven/" } else { "/maven/mvnd/" } + $distributionUrl = "$env:MVNW_REPOURL$MVNW_REPO_PATTERN$($distributionUrl -replace "^.*$MVNW_REPO_PATTERN",'')" +} +$distributionUrlName = $distributionUrl -replace '^.*/','' +$distributionUrlNameMain = $distributionUrlName -replace '\.[^.]*$','' -replace '-bin$','' + +$MAVEN_M2_PATH = "$HOME/.m2" +if ($env:MAVEN_USER_HOME) { + $MAVEN_M2_PATH = "$env:MAVEN_USER_HOME" +} + +if (-not (Test-Path -Path $MAVEN_M2_PATH)) { + New-Item -Path $MAVEN_M2_PATH -ItemType Directory | Out-Null +} + +$MAVEN_WRAPPER_DISTS = $null +if ((Get-Item $MAVEN_M2_PATH).Target[0] -eq $null) { + $MAVEN_WRAPPER_DISTS = "$MAVEN_M2_PATH/wrapper/dists" +} else { + $MAVEN_WRAPPER_DISTS = (Get-Item $MAVEN_M2_PATH).Target[0] + "/wrapper/dists" +} + +$MAVEN_HOME_PARENT = "$MAVEN_WRAPPER_DISTS/$distributionUrlNameMain" +$MAVEN_HOME_NAME = ([System.Security.Cryptography.SHA256]::Create().ComputeHash([byte[]][char[]]$distributionUrl) | ForEach-Object {$_.ToString("x2")}) -join '' +$MAVEN_HOME = "$MAVEN_HOME_PARENT/$MAVEN_HOME_NAME" + +if (Test-Path -Path "$MAVEN_HOME" -PathType Container) { + Write-Verbose "found existing MAVEN_HOME at $MAVEN_HOME" + Write-Output "MVN_CMD=$MAVEN_HOME/bin/$MVN_CMD" + exit $? +} + +if (! $distributionUrlNameMain -or ($distributionUrlName -eq $distributionUrlNameMain)) { + Write-Error "distributionUrl is not valid, must end with *-bin.zip, but found $distributionUrl" +} + +# prepare tmp dir +$TMP_DOWNLOAD_DIR_HOLDER = New-TemporaryFile +$TMP_DOWNLOAD_DIR = New-Item -Itemtype Directory -Path "$TMP_DOWNLOAD_DIR_HOLDER.dir" +$TMP_DOWNLOAD_DIR_HOLDER.Delete() | Out-Null +trap { + if ($TMP_DOWNLOAD_DIR.Exists) { + try { Remove-Item $TMP_DOWNLOAD_DIR -Recurse -Force | Out-Null } + catch { Write-Warning "Cannot remove $TMP_DOWNLOAD_DIR" } + } +} + +New-Item -Itemtype Directory -Path "$MAVEN_HOME_PARENT" -Force | Out-Null + +# Download and Install Apache Maven +Write-Verbose "Couldn't find MAVEN_HOME, downloading and installing it ..." +Write-Verbose "Downloading from: $distributionUrl" +Write-Verbose "Downloading to: $TMP_DOWNLOAD_DIR/$distributionUrlName" + +$webclient = New-Object System.Net.WebClient +if ($env:MVNW_USERNAME -and $env:MVNW_PASSWORD) { + $webclient.Credentials = New-Object System.Net.NetworkCredential($env:MVNW_USERNAME, $env:MVNW_PASSWORD) +} +[Net.ServicePointManager]::SecurityProtocol = [Net.SecurityProtocolType]::Tls12 +$webclient.DownloadFile($distributionUrl, "$TMP_DOWNLOAD_DIR/$distributionUrlName") | Out-Null + +# If specified, validate the SHA-256 sum of the Maven distribution zip file +$distributionSha256Sum = (Get-Content -Raw "$scriptDir/.mvn/wrapper/maven-wrapper.properties" | ConvertFrom-StringData).distributionSha256Sum +if ($distributionSha256Sum) { + if ($USE_MVND) { + Write-Error "Checksum validation is not supported for maven-mvnd. `nPlease disable validation by removing 'distributionSha256Sum' from your maven-wrapper.properties." + } + Import-Module $PSHOME\Modules\Microsoft.PowerShell.Utility -Function Get-FileHash + if ((Get-FileHash "$TMP_DOWNLOAD_DIR/$distributionUrlName" -Algorithm SHA256).Hash.ToLower() -ne $distributionSha256Sum) { + Write-Error "Error: Failed to validate Maven distribution SHA-256, your Maven distribution might be compromised. If you updated your Maven version, you need to update the specified distributionSha256Sum property." + } +} + +# unzip and move +Expand-Archive "$TMP_DOWNLOAD_DIR/$distributionUrlName" -DestinationPath "$TMP_DOWNLOAD_DIR" | Out-Null + +# Find the actual extracted directory name (handles snapshots where filename != directory name) +$actualDistributionDir = "" + +# First try the expected directory name (for regular distributions) +$expectedPath = Join-Path "$TMP_DOWNLOAD_DIR" "$distributionUrlNameMain" +$expectedMvnPath = Join-Path "$expectedPath" "bin/$MVN_CMD" +if ((Test-Path -Path $expectedPath -PathType Container) -and (Test-Path -Path $expectedMvnPath -PathType Leaf)) { + $actualDistributionDir = $distributionUrlNameMain +} + +# If not found, search for any directory with the Maven executable (for snapshots) +if (!$actualDistributionDir) { + Get-ChildItem -Path "$TMP_DOWNLOAD_DIR" -Directory | ForEach-Object { + $testPath = Join-Path $_.FullName "bin/$MVN_CMD" + if (Test-Path -Path $testPath -PathType Leaf) { + $actualDistributionDir = $_.Name + } + } +} + +if (!$actualDistributionDir) { + Write-Error "Could not find Maven distribution directory in extracted archive" +} + +Write-Verbose "Found extracted Maven distribution directory: $actualDistributionDir" +Rename-Item -Path "$TMP_DOWNLOAD_DIR/$actualDistributionDir" -NewName $MAVEN_HOME_NAME | Out-Null +try { + Move-Item -Path "$TMP_DOWNLOAD_DIR/$MAVEN_HOME_NAME" -Destination $MAVEN_HOME_PARENT | Out-Null +} catch { + if (! (Test-Path -Path "$MAVEN_HOME" -PathType Container)) { + Write-Error "fail to move MAVEN_HOME" + } +} finally { + try { Remove-Item $TMP_DOWNLOAD_DIR -Recurse -Force | Out-Null } + catch { Write-Warning "Cannot remove $TMP_DOWNLOAD_DIR" } +} + +Write-Output "MVN_CMD=$MAVEN_HOME/bin/$MVN_CMD" diff --git a/pom.xml b/pom.xml new file mode 100644 index 00000000..73f81f00 --- /dev/null +++ b/pom.xml @@ -0,0 +1,116 @@ + + + 4.0.0 + + org.springframework.boot + spring-boot-starter-parent + 4.0.5 + + + com.allobank + backend + 0.0.1-SNAPSHOT + + + + + + + + + + + + + + + + + 17 + + + + org.springframework.boot + spring-boot-starter-webflux + + + + org.projectlombok + lombok + true + + + + org.springframework.boot + spring-boot-starter-cache + + + com.github.ben-manes.caffeine + caffeine + + + com.fasterxml.jackson.core + jackson-databind + + + org.springframework.boot + spring-boot-starter-test + test + + + + + + + org.springframework.boot + spring-boot-maven-plugin + + + + org.projectlombok + lombok + + + + + + org.apache.maven.plugins + maven-compiler-plugin + + + default-compile + compile + + compile + + + + + org.projectlombok + lombok + + + + + + default-testCompile + test-compile + + testCompile + + + + + org.projectlombok + lombok + + + + + + + + + + diff --git a/src/main/java/com/allobank/backend/BackendApplication.java b/src/main/java/com/allobank/backend/BackendApplication.java new file mode 100644 index 00000000..9f1bbbff --- /dev/null +++ b/src/main/java/com/allobank/backend/BackendApplication.java @@ -0,0 +1,13 @@ +package com.allobank.backend; + +import org.springframework.boot.SpringApplication; +import org.springframework.boot.autoconfigure.SpringBootApplication; + +@SpringBootApplication +public class BackendApplication { + + public static void main(String[] args) { + SpringApplication.run(BackendApplication.class, args); + } + +} diff --git a/src/main/java/com/allobank/backend/config/JacksonConfig.java b/src/main/java/com/allobank/backend/config/JacksonConfig.java new file mode 100644 index 00000000..8e526867 --- /dev/null +++ b/src/main/java/com/allobank/backend/config/JacksonConfig.java @@ -0,0 +1,14 @@ +package com.allobank.backend.config; + +import com.fasterxml.jackson.databind.ObjectMapper; +import org.springframework.context.annotation.Bean; +import org.springframework.context.annotation.Configuration; + +@Configuration +public class JacksonConfig { + + @Bean + public ObjectMapper objectMapper() { + return new ObjectMapper(); + } +} \ No newline at end of file diff --git a/src/main/java/com/allobank/backend/config/WebClientFactoryBean.java b/src/main/java/com/allobank/backend/config/WebClientFactoryBean.java new file mode 100644 index 00000000..434d4228 --- /dev/null +++ b/src/main/java/com/allobank/backend/config/WebClientFactoryBean.java @@ -0,0 +1,43 @@ +package com.allobank.backend.config; + +import org.springframework.beans.factory.FactoryBean; +import org.springframework.beans.factory.annotation.Value; +import org.springframework.http.HttpHeaders; +import org.springframework.http.MediaType; +import org.springframework.http.client.reactive.ReactorClientHttpConnector; +import org.springframework.stereotype.Component; +import org.springframework.web.reactive.function.client.WebClient; +import reactor.netty.http.client.HttpClient; + +import java.time.Duration; + +@Component +public class WebClientFactoryBean implements FactoryBean { + + @Value("${frankfurter.api.base-url}") + private String baseUrl; + + @Override + public WebClient getObject() { + HttpClient httpClient = HttpClient.create() + .followRedirect(true) + .responseTimeout(Duration.ofSeconds(10)); + + return WebClient.builder() + .baseUrl(baseUrl) + .clientConnector(new ReactorClientHttpConnector(httpClient)) + .defaultHeader(HttpHeaders.USER_AGENT, "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36") + .defaultHeader(HttpHeaders.ACCEPT, MediaType.APPLICATION_JSON_VALUE) + .build(); + } + + @Override + public Class getObjectType() { + return WebClient.class; + } + + @Override + public boolean isSingleton() { + return true; + } +} \ No newline at end of file diff --git a/src/main/java/com/allobank/backend/controller/FinanceController.java b/src/main/java/com/allobank/backend/controller/FinanceController.java new file mode 100644 index 00000000..bdac6fad --- /dev/null +++ b/src/main/java/com/allobank/backend/controller/FinanceController.java @@ -0,0 +1,34 @@ +package com.allobank.backend.controller; + +import org.springframework.http.MediaType; +import org.springframework.http.ResponseEntity; +import org.springframework.web.bind.annotation.GetMapping; +import org.springframework.web.bind.annotation.PathVariable; +import org.springframework.web.bind.annotation.RequestMapping; +import org.springframework.web.bind.annotation.RestController; + +import com.allobank.backend.store.FinanceDataStore; + +import lombok.RequiredArgsConstructor; + +import com.fasterxml.jackson.databind.JsonNode; + +@RestController +@RequestMapping("/api/finance") +@RequiredArgsConstructor +public class FinanceController { + + private final FinanceDataStore dataStore; + + @GetMapping(value = "/data/{resourceType}", produces = MediaType.APPLICATION_JSON_VALUE) + public ResponseEntity getFinanceData(@PathVariable String resourceType) { + + JsonNode data = dataStore.getData(resourceType); + + String jsonString = data.toPrettyString(); + + return ResponseEntity.ok() + .contentType(MediaType.APPLICATION_JSON) + .body(jsonString); + } +} \ No newline at end of file diff --git a/src/main/java/com/allobank/backend/exception/GlobalExceptionHandler.java b/src/main/java/com/allobank/backend/exception/GlobalExceptionHandler.java new file mode 100644 index 00000000..93d8a926 --- /dev/null +++ b/src/main/java/com/allobank/backend/exception/GlobalExceptionHandler.java @@ -0,0 +1,37 @@ +package com.allobank.backend.exception; + +import java.time.LocalDateTime; +import java.util.HashMap; +import java.util.Map; + +import org.springframework.http.HttpStatus; +import org.springframework.http.ResponseEntity; +import org.springframework.web.bind.annotation.ExceptionHandler; +import org.springframework.web.bind.annotation.RestControllerAdvice; +import org.springframework.web.reactive.function.client.WebClientResponseException; + +@RestControllerAdvice +public class GlobalExceptionHandler { + @ExceptionHandler(IllegalArgumentException.class) + public ResponseEntity> handleIllegalArgumentException(IllegalArgumentException ex) { + Map errorResponse = new HashMap<>(); + errorResponse.put("timestamp", LocalDateTime.now()); + errorResponse.put("status", HttpStatus.BAD_REQUEST.value()); + errorResponse.put("error", "Bad Request"); + errorResponse.put("message", ex.getMessage()); + + return ResponseEntity.status(HttpStatus.BAD_REQUEST).body(errorResponse); + } + + @ExceptionHandler(WebClientResponseException.class) + public ResponseEntity> handleWebClientException(WebClientResponseException ex) { + Map errorResponse = new HashMap<>(); + errorResponse.put("timestamp", LocalDateTime.now()); + errorResponse.put("status", HttpStatus.BAD_GATEWAY.value()); + errorResponse.put("error", "External API Error"); + errorResponse.put("message", "Gagal mengambil data dari Frankfurter API"); + + return ResponseEntity.status(HttpStatus.BAD_GATEWAY).body(errorResponse); + } + +} diff --git a/src/main/java/com/allobank/backend/runner/FinanceDataStartupRunner.java b/src/main/java/com/allobank/backend/runner/FinanceDataStartupRunner.java new file mode 100644 index 00000000..5304960a --- /dev/null +++ b/src/main/java/com/allobank/backend/runner/FinanceDataStartupRunner.java @@ -0,0 +1,45 @@ +package com.allobank.backend.runner; + + +import lombok.RequiredArgsConstructor; +import lombok.extern.slf4j.Slf4j; +import com.fasterxml.jackson.databind.JsonNode; + +import org.springframework.boot.ApplicationArguments; +import org.springframework.boot.ApplicationRunner; +import org.springframework.stereotype.Component; + +import com.allobank.backend.store.FinanceDataStore; +import com.allobank.backend.strategy.FinanceDataStrategy; + +import java.util.Map; +import java.util.concurrent.ConcurrentHashMap; + +@Slf4j +@Component +@RequiredArgsConstructor +public class FinanceDataStartupRunner implements ApplicationRunner { + + private final Map strategies; + private final FinanceDataStore dataStore; + + @Override + public void run(ApplicationArguments args) { + log.info("Starting data fetching process from Frankfurter API..."); + Map fetchedData = new ConcurrentHashMap<>(); + + strategies.forEach((resourceType, strategy) -> { + try { + + JsonNode result = strategy.fetchAndTransformData().block(); + fetchedData.put(resourceType, result); + log.info("Successfully loaded data for: {}", resourceType); + } catch (Exception e) { + log.error("Failed to load data for {}: {}", resourceType, e.getMessage()); + } + }); + + dataStore.initializeStore(fetchedData); + log.info("All data has been loaded into the store and is ready to serve requests."); + } +} diff --git a/src/main/java/com/allobank/backend/store/FinanceDataStore.java b/src/main/java/com/allobank/backend/store/FinanceDataStore.java new file mode 100644 index 00000000..5df8f5c8 --- /dev/null +++ b/src/main/java/com/allobank/backend/store/FinanceDataStore.java @@ -0,0 +1,25 @@ +package com.allobank.backend.store; + + +import org.springframework.stereotype.Service; + +import com.fasterxml.jackson.databind.JsonNode; + +import java.util.Map; + +@Service +public class FinanceDataStore { + + private Map immutableDataStore; + + public void initializeStore(Map data) { + this.immutableDataStore = Map.copyOf(data); + } + + public JsonNode getData(String resourceType) { + if (immutableDataStore == null || !immutableDataStore.containsKey(resourceType)) { + throw new IllegalArgumentException("Data tidak ditemukan atau belum siap: " + resourceType); + } + return immutableDataStore.get(resourceType); + } +} \ No newline at end of file diff --git a/src/main/java/com/allobank/backend/strategy/FinanceDataStrategy.java b/src/main/java/com/allobank/backend/strategy/FinanceDataStrategy.java new file mode 100644 index 00000000..5861356a --- /dev/null +++ b/src/main/java/com/allobank/backend/strategy/FinanceDataStrategy.java @@ -0,0 +1,8 @@ +package com.allobank.backend.strategy; + +import com.fasterxml.jackson.databind.JsonNode; +import reactor.core.publisher.Mono; + +public interface FinanceDataStrategy { + Mono fetchAndTransformData(); +} \ No newline at end of file diff --git a/src/main/java/com/allobank/backend/strategy/HistoricalIdrUsd.java b/src/main/java/com/allobank/backend/strategy/HistoricalIdrUsd.java new file mode 100644 index 00000000..fbc808c2 --- /dev/null +++ b/src/main/java/com/allobank/backend/strategy/HistoricalIdrUsd.java @@ -0,0 +1,32 @@ +package com.allobank.backend.strategy; + +import org.springframework.stereotype.Component; +import org.springframework.web.reactive.function.client.WebClient; + +import lombok.RequiredArgsConstructor; +import reactor.core.publisher.Mono; +import com.fasterxml.jackson.databind.JsonNode; +import com.fasterxml.jackson.databind.ObjectMapper; + +@Component("historical_idr_usd") +@RequiredArgsConstructor +public class HistoricalIdrUsd implements FinanceDataStrategy { + private final WebClient webClient; + private final ObjectMapper objectMapper; + + @Override + public Mono fetchAndTransformData() { + return webClient.get() + .uri("/2024-01-01..2024-01-05?from=IDR&to=USD") + .retrieve() + .bodyToMono(String.class) + .map(jsonString -> { + try { + return objectMapper.readTree(jsonString); + } catch (Exception e) { + throw new RuntimeException("Gagal membaca JSON histori", e); + } + }); + } + +} diff --git a/src/main/java/com/allobank/backend/strategy/LatestIdrRatesStrategy.java b/src/main/java/com/allobank/backend/strategy/LatestIdrRatesStrategy.java new file mode 100644 index 00000000..fe5c0576 --- /dev/null +++ b/src/main/java/com/allobank/backend/strategy/LatestIdrRatesStrategy.java @@ -0,0 +1,55 @@ +package com.allobank.backend.strategy; + +import lombok.RequiredArgsConstructor; +import org.springframework.stereotype.Component; +import org.springframework.web.reactive.function.client.WebClient; +import reactor.core.publisher.Mono; +import com.fasterxml.jackson.databind.JsonNode; +import com.fasterxml.jackson.databind.ObjectMapper; +import com.fasterxml.jackson.databind.node.ObjectNode; + + + +@Component("latest_idr_rates") +@RequiredArgsConstructor +public class LatestIdrRatesStrategy implements FinanceDataStrategy { + private final WebClient webClient; + private final ObjectMapper objectMapper; + private final String GITHUB_USERNAME = "asyifa-zahwa"; + + @Override + public Mono fetchAndTransformData() { + return webClient.get() + .uri("/latest?from=IDR") + .retrieve() + .bodyToMono(String.class) + .map(jsonString -> { + try { + return objectMapper.readTree(jsonString); + } catch (Exception e) { + throw new RuntimeException("Failed to read JSON from Frankfurter", e); + } + }) + .map(this::applyBuySpreadTransformation); + } + + private JsonNode applyBuySpreadTransformation(JsonNode rootNode) { + if (rootNode.isObject() && rootNode.has("rates")) { + ObjectNode rootObject = (ObjectNode) rootNode; + JsonNode ratesNode = rootObject.get("rates"); + + if (ratesNode.has("USD")) { + double rateUsd = ratesNode.get("USD").asDouble(); + int sum = GITHUB_USERNAME.toLowerCase().chars().sum(); + double spreadFactor = (sum % 1000) / 100000.0; + double usdBuySpreadIdr = (1 / rateUsd) * (1 + spreadFactor); + rootObject.put("USD_BuySpread_IDR", usdBuySpreadIdr); + }else { + throw new IllegalStateException("Calculation failed: Currency USD not found in Frankfurter API response!"); + } + } else { + throw new IllegalStateException("Format JSON from Frankfurter is invalid!"); + } + return rootNode; + } +} \ No newline at end of file diff --git a/src/main/java/com/allobank/backend/strategy/SupportedCurrencies.java b/src/main/java/com/allobank/backend/strategy/SupportedCurrencies.java new file mode 100644 index 00000000..c3ada917 --- /dev/null +++ b/src/main/java/com/allobank/backend/strategy/SupportedCurrencies.java @@ -0,0 +1,31 @@ +package com.allobank.backend.strategy; + +import org.springframework.stereotype.Component; +import org.springframework.web.reactive.function.client.WebClient; + +import lombok.RequiredArgsConstructor; +import reactor.core.publisher.Mono; +import com.fasterxml.jackson.databind.JsonNode; +import com.fasterxml.jackson.databind.ObjectMapper; + +@Component("supported_currencies") +@RequiredArgsConstructor +public class SupportedCurrencies implements FinanceDataStrategy { + private final WebClient webClient; + private final ObjectMapper objectMapper; + @Override + public Mono fetchAndTransformData() { + return webClient.get() + .uri("/currencies") + .retrieve() + .bodyToMono(String.class) + .map(jsonString -> { + try { + return objectMapper.readTree(jsonString); + } catch (Exception e) { + throw new RuntimeException("Gagal membaca JSON supported currencies", e); + } + }); + } + +} diff --git a/src/main/resources/application.properties b/src/main/resources/application.properties new file mode 100644 index 00000000..43f19b84 --- /dev/null +++ b/src/main/resources/application.properties @@ -0,0 +1,2 @@ +spring.application.name=backend +frankfurter.api.base-url=https://api.frankfurter.app/ \ No newline at end of file diff --git a/src/test/java/com/allobank/backend/BackendApplicationTests.java b/src/test/java/com/allobank/backend/BackendApplicationTests.java new file mode 100644 index 00000000..a4c103ad --- /dev/null +++ b/src/test/java/com/allobank/backend/BackendApplicationTests.java @@ -0,0 +1,13 @@ +package com.allobank.backend; + +import org.junit.jupiter.api.Test; +import org.springframework.boot.test.context.SpringBootTest; + +@SpringBootTest +class BackendApplicationTests { + + @Test + void contextLoads() { + } + +} diff --git a/src/test/java/com/allobank/backend/runner/FinanceDataStartupRunnerTest.java b/src/test/java/com/allobank/backend/runner/FinanceDataStartupRunnerTest.java new file mode 100644 index 00000000..7c41a60b --- /dev/null +++ b/src/test/java/com/allobank/backend/runner/FinanceDataStartupRunnerTest.java @@ -0,0 +1,24 @@ +package com.allobank.backend.runner; + +import com.allobank.backend.store.FinanceDataStore; +import org.junit.jupiter.api.Test; +import org.springframework.beans.factory.annotation.Autowired; +import org.springframework.boot.test.context.SpringBootTest; + +import static org.junit.jupiter.api.Assertions.assertNotNull; + +@SpringBootTest +class FinanceDataStartupRunnerTest { + + @Autowired + private FinanceDataStore dataStore; + + @Test + void testApplicationRunnerPopulatesStoreOnStartup() { + + + assertNotNull(dataStore.getData("latest_idr_rates"), "Data latest_idr_rates harusnya sudah ada di memori"); + assertNotNull(dataStore.getData("historical_idr_usd"), "Data historical_idr_usd harusnya sudah ada di memori"); + assertNotNull(dataStore.getData("supported_currencies"), "Data supported_currencies harusnya sudah ada di memori"); + } +} \ No newline at end of file diff --git a/src/test/java/com/allobank/backend/strategy/LatestIdrRatesStrategyTest.Java b/src/test/java/com/allobank/backend/strategy/LatestIdrRatesStrategyTest.Java new file mode 100644 index 00000000..73263021 --- /dev/null +++ b/src/test/java/com/allobank/backend/strategy/LatestIdrRatesStrategyTest.Java @@ -0,0 +1,57 @@ +package com.allobank.backend.strategy; + +import com.fasterxml.jackson.databind.JsonNode; +import com.fasterxml.jackson.databind.ObjectMapper; +import okhttp3.mockwebserver.MockResponse; +import okhttp3.mockwebserver.MockWebServer; +import org.junit.jupiter.api.AfterAll; +import org.junit.jupiter.api.BeforeAll; +import org.junit.jupiter.api.Test; +import org.springframework.web.reactive.function.client.WebClient; +import reactor.test.StepVerifier; + +import java.io.IOException; + +import static org.junit.jupiter.api.Assertions.*; + +class LatestIdrRatesStrategyTest { + + private static MockWebServer mockBackEnd; + private LatestIdrRatesStrategy strategy; + private ObjectMapper objectMapper = new ObjectMapper(); + + @BeforeAll + static void setUp() throws IOException { + mockBackEnd = new MockWebServer(); + mockBackEnd.start(); + } + + @AfterAll + static void tearDown() throws IOException { + mockBackEnd.shutdown(); + } + + @Test + void testFetchAndTransformData_Success() { + + String baseUrl = mockBackEnd.url("/").toString(); + WebClient mockWebClient = WebClient.builder().baseUrl(baseUrl).build(); + + strategy = new LatestIdrRatesStrategy(mockWebClient, objectMapper); + + String mockJsonResponse = "{\"amount\": 1.0, \"base\": \"IDR\", \"date\": \"2024-04-23\", \"rates\": {\"USD\": 0.000062}}"; + mockBackEnd.enqueue(new MockResponse() + .setBody(mockJsonResponse) + .addHeader("Content-Type", "application/json")); + + StepVerifier.create(strategy.fetchAndTransformData()) + .assertNext(jsonNode -> { + assertTrue(jsonNode.has("rates")); + assertTrue(jsonNode.get("rates").has("USD_BuySpread_IDR")); + + double calculatedSpread = jsonNode.get("rates").get("USD_BuySpread_IDR").asDouble(); + assertNotNull(calculatedSpread); + }) + .verifyComplete(); + } +} \ No newline at end of file From b7a8ed610354af359dca8cf6f8aaadd3bd202040 Mon Sep 17 00:00:00 2001 From: asyifa zahwa Date: Fri, 24 Apr 2026 10:53:37 +0700 Subject: [PATCH 2/3] docs: update README --- README.md | 13 +++++++------ 1 file changed, 7 insertions(+), 6 deletions(-) diff --git a/README.md b/README.md index 906eddc9..7ded250f 100644 --- a/README.md +++ b/README.md @@ -1,13 +1,13 @@ # Finance Data Aggregator API -A production-ready Spring Boot Reactive API that aggregates and transforms currency exchange data from the public Frankfurter API. Built with high performance, thread-safety, and clean architecture in mind. +A production-ready Spring Boot Reactive API that aggregates and transforms currency exchange data from the public Frankfurter API. ## Setup & Run Instructions **Prerequisites:** - Java 17 or higher -- Maven 3.8+ +- Maven 3.9.9 or higher **1. Clone the repository:** ```bash @@ -32,19 +32,20 @@ The application exposes a single endpoint serving data from the in-memory store. ```bash Base URL: http://localhost:8080/api/finance/data/{resourceType} ``` -Example cURL Commands: -Latest IDR Rates (with custom spread calculation): +**3 cURL Commands:** + + - Latest IDR Rates (with custom spread calculation): ```bash curl -X GET http://localhost:8080/api/finance/data/latest_idr_rates ``` -Historical IDR to USD: + - Historical IDR to USD: ```bash curl -X GET http://localhost:8080/api/finance/data/historical_idr_usd ``` -Supported Currencies: + - Supported Currencies: ```bash curl -X GET http://localhost:8080/api/finance/data/supported_currencies ``` From e21fddb5cbd8d7c9d37d038590653266360e53ea Mon Sep 17 00:00:00 2001 From: asyifa zahwa Date: Fri, 24 Apr 2026 11:04:48 +0700 Subject: [PATCH 3/3] docs: update README --- README.md | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/README.md b/README.md index 7ded250f..cae4a33d 100644 --- a/README.md +++ b/README.md @@ -1,4 +1,4 @@ -# Finance Data Aggregator API +# Frankfurter Data Aggregator API A production-ready Spring Boot Reactive API that aggregates and transforms currency exchange data from the public Frankfurter API.