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..72158ab9 100644 --- a/README.md +++ b/README.md @@ -1,139 +1,73 @@ -# Allo Bank Backend Developer Take-Home Test - -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. - -## 📝 Objective - -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. - -## I. Core Task: The Polymorphic API - -### 1. External API Integration (Frankfurter API) - -* **Base URL (Public):** `https://api.frankfurter.app/`. - -* You must integrate with three distinct data resources to enforce the architectural pattern: - - 1. `/latest?base=IDR` (The latest rates relative to IDR) - - 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.* - - 3. `/currencies` (The list of all supported currency symbols) - -### 2. Internal API Endpoint - -You must expose **one single endpoint** in your application: ```GET /api/finance/data/{resourceType}``` - -Where `{resourceType}` can be one of the three strings: `latest_idr_rates`, `historical_idr_usd`, or `supported_currencies`. - -### 3. Required Functionality & Business Logic - -* **Resource Handling:** Your service must correctly map the three incoming `resourceType` values to the correct data fetching strategies. - -* **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! +== OVERVIEW == +This application integrates with the Frankfurter API to provide: +1. Latest IDR exchange rates (with custom spread calculation) +2. Historical IDR to USD data +3. Supported currency list +All data is fetched at startup and served via a REST API. + +== Setup & Run Instructions == +1. Clone Repository +git clone +cd api_finance_data + +2. Build Project +mvn clean install + +3. Run Application +mvn spring-boot:run + +Application will start at: +http://localhost:8080 + +4. Run Tests +mvn test + +== Endpoint Usage == +1. Get Latest IDR Rates +curl http://localhost:8080/api/finance/data/latest_idr_rates + +2. Get Historical IDR → USD +curl http://localhost:8080/api/finance/data/historical_idr_usd + +3. Get Supported Currencies +curl http://localhost:8080/api/finance/data/supported_currencies + +== Personalization Note == +GitHub Username: nisaulchaira14 + +Spread Factor Calculation +1. Convert username to lowercase +2. Sum ASCII values +3. Apply formula: +Spread Factor = (sum % 1000) / 100000.0 + +Result: +Spread Factor = 0.00369 + +For latest_idr_rates, a custom field is added: +USD_BuySpread_IDR = (1 / Rate_USD) * (1 + Spread Factor) + +== Architectural Rationale == +1. Polymorphism Justification (Strategy Pattern) + +The Strategy Pattern is used to handle multiple resource types (latest, historical, currencies) instead of using conditional logic (if-else or switch-case). +Benefits: +- Extensibility: New resource types can be added by simply implementing a new IDRDataFetcher without modifying existing code. +- Maintainability: Each fetcher encapsulates its own logic, making the code easier to read and debug. +- Single Responsibility: Each class handles only one type of data retrieval. + +2. Client Factory (FactoryBean) +A custom FactoryBean is used to construct the external API client. +Purpose: +Centralize HTTP client configuration (timeouts, headers) +Ensure consistent client creation across the application + +3. Startup Runner Choice (ApplicationRunner) +ApplicationRunner is used to load all external data at application startup. +Benefits of ApplicationRunner: +- Executes after Spring context is fully ready +- Ensures all beans are available +- More reliable for external API calls +- Better suited for production initialization tasks + +Thank you for reviewing this submission :) \ No newline at end of file diff --git a/mvnw b/mvnw new file mode 100644 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..03a02355 --- /dev/null +++ b/pom.xml @@ -0,0 +1,118 @@ + + + 4.0.0 + + org.springframework.boot + spring-boot-starter-parent + 2.7.18 + + + com.example.finance + api_finance_data + 0.0.1-SNAPSHOT + api_finance_data + + + + + + + + + + + + + + + + 1.8 + + + + org.springframework.boot + spring-boot-starter-web + + + + org.springframework.boot + spring-boot-devtools + runtime + true + + + org.projectlombok + lombok + true + + + org.springframework.boot + spring-boot-starter-test + test + + + org.springframework.boot + spring-boot-starter-webflux + + + org.springframework.boot + spring-boot-configuration-processor + true + + + + + + + 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/example/finance/ApiFinanceDataApplication.java b/src/main/java/com/example/finance/ApiFinanceDataApplication.java new file mode 100644 index 00000000..69219464 --- /dev/null +++ b/src/main/java/com/example/finance/ApiFinanceDataApplication.java @@ -0,0 +1,13 @@ +package com.example.finance; + +import org.springframework.boot.SpringApplication; +import org.springframework.boot.autoconfigure.SpringBootApplication; + +@SpringBootApplication +public class ApiFinanceDataApplication { + + public static void main(String[] args) { + SpringApplication.run(ApiFinanceDataApplication.class, args); + } + +} diff --git a/src/main/java/com/example/finance/client/RestTemplateFactoryBean.java b/src/main/java/com/example/finance/client/RestTemplateFactoryBean.java new file mode 100644 index 00000000..4ea1eb17 --- /dev/null +++ b/src/main/java/com/example/finance/client/RestTemplateFactoryBean.java @@ -0,0 +1,37 @@ +package com.example.finance.client; + +import org.springframework.beans.factory.FactoryBean; +import org.springframework.http.client.SimpleClientHttpRequestFactory; +import org.springframework.stereotype.Component; +import org.springframework.web.client.RestTemplate; + +@Component("frankfurterRestTemplate") +public class RestTemplateFactoryBean implements FactoryBean { + + private RestTemplate restTemplate; + + @Override + public RestTemplate getObject() { + + if (restTemplate == null) { + + SimpleClientHttpRequestFactory factory = new SimpleClientHttpRequestFactory(); + factory.setConnectTimeout(5000); + factory.setReadTimeout(5000); + + restTemplate = new RestTemplate(factory); + } + + return restTemplate; + } + + @Override + public Class getObjectType() { + return RestTemplate.class; + } + + @Override + public boolean isSingleton() { + return true; + } +} \ No newline at end of file diff --git a/src/main/java/com/example/finance/config/FrankfurterProperties.java b/src/main/java/com/example/finance/config/FrankfurterProperties.java new file mode 100644 index 00000000..e36173f6 --- /dev/null +++ b/src/main/java/com/example/finance/config/FrankfurterProperties.java @@ -0,0 +1,47 @@ +package com.example.finance.config; + +import org.springframework.boot.context.properties.ConfigurationProperties; +import org.springframework.context.annotation.Configuration; + +import lombok.Getter; +import lombok.Setter; + +@Configuration +@Getter +@Setter +@ConfigurationProperties(prefix = "frankfurter") +public class FrankfurterProperties { + + private String baseUrl; + private Endpoints endpoints; + + public static class Endpoints { + private String currencies; + private String latest; + private String historical; + + public String getCurrencies() { + return currencies; + } + + public void setCurrencies(String currencies) { + this.currencies = currencies; + } + + public String getLatest() { + return latest; + } + + public void setLatest(String latest) { + this.latest = latest; + } + + public String getHistorical() { + return historical; + } + + public void setHistorical(String historical) { + this.historical = historical; + } + } +} \ No newline at end of file diff --git a/src/main/java/com/example/finance/controller/FinanceDataController.java b/src/main/java/com/example/finance/controller/FinanceDataController.java new file mode 100644 index 00000000..c19f5542 --- /dev/null +++ b/src/main/java/com/example/finance/controller/FinanceDataController.java @@ -0,0 +1,46 @@ +package com.example.finance.controller; + +import org.slf4j.Logger; +import org.slf4j.LoggerFactory; +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.example.finance.service.FinanceDataService; + +@RestController +@RequestMapping("/api/finance") +public class FinanceDataController { + + private static final Logger log = LoggerFactory.getLogger(FinanceDataController.class); + + private final FinanceDataService financeDataService; + + public FinanceDataController(FinanceDataService financeDataService) { + this.financeDataService = financeDataService; + } + + @GetMapping("/data/{resourceType}") + public Object getData(@PathVariable String resourceType) { + log.info("Incoming request for resourceType={}", resourceType); + + try { + + Object result = financeDataService.getData(resourceType); + + log.info("Response={}", result); + + return result; + + } catch (IllegalArgumentException e) { + log.error("Invalid resourceType={}", resourceType, e); + return "Invalid resourceType"; + + } catch (Exception e) { + log.error("Error processing request ", e); + return "Error processing request"; + } + + } +} diff --git a/src/main/java/com/example/finance/runner/DataLoaderRunner.java b/src/main/java/com/example/finance/runner/DataLoaderRunner.java new file mode 100644 index 00000000..84f404e8 --- /dev/null +++ b/src/main/java/com/example/finance/runner/DataLoaderRunner.java @@ -0,0 +1,51 @@ +package com.example.finance.runner; + +import org.slf4j.Logger; +import org.slf4j.LoggerFactory; +import org.springframework.boot.ApplicationRunner; +import org.springframework.context.annotation.Bean; +import org.springframework.context.annotation.Configuration; + +import com.example.finance.service.IDRDataFetcher; +import com.example.finance.storage.InMemoryDataStore; + +import java.util.HashMap; +import java.util.List; +import java.util.Map; + +@Configuration +public class DataLoaderRunner { + + private static final Logger log = LoggerFactory.getLogger(DataLoaderRunner.class); + + @Bean + public ApplicationRunner loadData(List fetchers, InMemoryDataStore store) { + + return args -> { + + log.info("Starting data loading at application startup..."); + + Map loadedData = new HashMap<>(); + + for (IDRDataFetcher fetcher : fetchers) { + + String type = fetcher.getType(); + + try { + Object data = fetcher.fetchData(); + + loadedData.put(type, data); + + log.info("Successfully loaded data for type: {}", type); + + } catch (Exception e) { + log.error("Failed to load data for type: {}", type, e); + } + } + + store.setData(loadedData); + + log.info("All data loaded successfully and stored in memory : {}", loadedData); + }; + } +} \ No newline at end of file diff --git a/src/main/java/com/example/finance/service/CurrencyFetcher.java b/src/main/java/com/example/finance/service/CurrencyFetcher.java new file mode 100644 index 00000000..996ef67e --- /dev/null +++ b/src/main/java/com/example/finance/service/CurrencyFetcher.java @@ -0,0 +1,48 @@ +package com.example.finance.service; + +import org.slf4j.Logger; +import org.slf4j.LoggerFactory; + +import org.springframework.stereotype.Component; +import java.util.Map; + +@Component +public class CurrencyFetcher implements IDRDataFetcher { + + private static final Logger log = LoggerFactory.getLogger(CurrencyFetcher.class); + + private final HitExternalApiService apiService; + + public CurrencyFetcher(HitExternalApiService apiService) { + this.apiService = apiService; + } + + @Override + public String getType() { + return "supported_currencies"; + } + + @SuppressWarnings("unchecked") + @Override + public Object fetchData() { + + log.info("Start fetching supported currencies"); + + try { + Map response = apiService.get(apiService.endpoints().getCurrencies(), null, Map.class); + + if (response == null || response.isEmpty()) { + log.error("Currencies response is empty"); + throw new RuntimeException("Currencies response is empty"); + } + + log.info("Finish fetching supported currencies, Response data: {}", response); + + return response; + + } catch (Exception e) { + log.error("Failed to fetch currencies", e); + throw new RuntimeException("Failed to fetch currencies", e); + } + } +} \ No newline at end of file diff --git a/src/main/java/com/example/finance/service/FinanceDataService.java b/src/main/java/com/example/finance/service/FinanceDataService.java new file mode 100644 index 00000000..887e3d79 --- /dev/null +++ b/src/main/java/com/example/finance/service/FinanceDataService.java @@ -0,0 +1,25 @@ +package com.example.finance.service; + +import org.springframework.stereotype.Service; + +import com.example.finance.storage.InMemoryDataStore; + +@Service +public class FinanceDataService { + + private final InMemoryDataStore store; + + public FinanceDataService(InMemoryDataStore store) { + this.store = store; + } + + public Object getData(String resourceType) { + Object data = store.getData(resourceType); + + if (data == null) { + throw new IllegalArgumentException("Invalid resource type: " + resourceType); + } + + return data; + } +} diff --git a/src/main/java/com/example/finance/service/HistoricalFetcher.java b/src/main/java/com/example/finance/service/HistoricalFetcher.java new file mode 100644 index 00000000..e3405228 --- /dev/null +++ b/src/main/java/com/example/finance/service/HistoricalFetcher.java @@ -0,0 +1,49 @@ +package com.example.finance.service; + +import org.slf4j.Logger; +import org.slf4j.LoggerFactory; +import org.springframework.stereotype.Component; + +import java.util.Map; + +@Component +public class HistoricalFetcher implements IDRDataFetcher { + + private static final Logger log = LoggerFactory.getLogger(HistoricalFetcher.class); + + private final HitExternalApiService apiService; + + public HistoricalFetcher(HitExternalApiService apiService) { + this.apiService = apiService; + } + + @Override + public String getType() { + return "historical_idr_usd"; + } + + @SuppressWarnings("unchecked") + @Override + public Object fetchData() { + + log.info("Start fetching historical"); + + try { + Map response = apiService.get(apiService.endpoints().getHistorical(), "?from=IDR&to=USD", + Map.class); + + if (response == null || response.isEmpty()) { + log.error("Historical response is empty"); + throw new RuntimeException("Historical response is empty"); + } + + log.info("Finish fetching Historical, Response data: {}", response); + + return response; + + } catch (Exception e) { + log.error("Failed to fetch Historical", e); + throw new RuntimeException("Failed to fetch Historical", e); + } + } +} \ No newline at end of file diff --git a/src/main/java/com/example/finance/service/HitExternalApiService.java b/src/main/java/com/example/finance/service/HitExternalApiService.java new file mode 100644 index 00000000..30c14e1c --- /dev/null +++ b/src/main/java/com/example/finance/service/HitExternalApiService.java @@ -0,0 +1,60 @@ +package com.example.finance.service; + +import com.example.finance.config.FrankfurterProperties; + +import org.slf4j.Logger; +import org.slf4j.LoggerFactory; +import org.springframework.beans.factory.annotation.Qualifier; +import org.springframework.http.*; +import org.springframework.stereotype.Service; +import org.springframework.web.client.RestTemplate; + +@Service +public class HitExternalApiService { + + private static final Logger log = LoggerFactory.getLogger(HitExternalApiService.class); + + private final RestTemplate restTemplate; + private final FrankfurterProperties properties; + + public HitExternalApiService(@Qualifier("frankfurterRestTemplate") RestTemplate restTemplate, + FrankfurterProperties properties) { + this.restTemplate = restTemplate; + this.properties = properties; + } + + private HttpEntity createEntity() { + HttpHeaders headers = new HttpHeaders(); + headers.set("User-Agent", "Mozilla/5.0"); + headers.setContentType(MediaType.APPLICATION_JSON); + return new HttpEntity<>(headers); + } + + public T get(String endpoint, String query, Class clazz) { + + String url = properties.getBaseUrl() + endpoint; + + try { + + if (query != null) { + url += query; + } + + ResponseEntity response = restTemplate.exchange(url, HttpMethod.GET, createEntity(), clazz); + + if (!response.getStatusCode().is2xxSuccessful()) { + throw new RuntimeException("External API error: " + response.getStatusCode()); + } + + return response.getBody(); + + } catch (Exception e) { + log.error("Failed calling API: {}", url, e); + throw new RuntimeException("Failed calling API", e); + } + } + + public FrankfurterProperties.Endpoints endpoints() { + return properties.getEndpoints(); + } +} diff --git a/src/main/java/com/example/finance/service/IDRDataFetcher.java b/src/main/java/com/example/finance/service/IDRDataFetcher.java new file mode 100644 index 00000000..5e514508 --- /dev/null +++ b/src/main/java/com/example/finance/service/IDRDataFetcher.java @@ -0,0 +1,8 @@ +package com.example.finance.service; + +public interface IDRDataFetcher { + + String getType(); + + Object fetchData(); +} diff --git a/src/main/java/com/example/finance/service/LatestRatesFetcher.java b/src/main/java/com/example/finance/service/LatestRatesFetcher.java new file mode 100644 index 00000000..f402d696 --- /dev/null +++ b/src/main/java/com/example/finance/service/LatestRatesFetcher.java @@ -0,0 +1,52 @@ +package com.example.finance.service; + +import java.util.Map; + +import org.slf4j.Logger; +import org.slf4j.LoggerFactory; +import org.springframework.stereotype.Component; + +import com.example.finance.util.SpreadCalculator; + +@Component +public class LatestRatesFetcher implements IDRDataFetcher { + + private static final Logger log = LoggerFactory.getLogger(LatestRatesFetcher.class); + + private final HitExternalApiService apiService; + + private static final String Username = "nisaulchaira14"; + + public LatestRatesFetcher(HitExternalApiService apiService) { + this.apiService = apiService; + } + + @Override + public String getType() { + return "latest_idr_rates"; + } + + @SuppressWarnings("unchecked") + @Override + public Object fetchData() { + log.info("Start fetching Latest IDR Rates"); + + try { + Map response = apiService.get(apiService.endpoints().getLatest(), "?base=IDR", Map.class); + + Map rates = (Map) response.get("rates"); + + double usdRate = rates.get("USD"); + + double spread = SpreadCalculator.calculateUsdBuySpread(usdRate, Username); + + response.put("USD_BuySpread_IDR", spread); + log.info("Finish fetching Latest IDR Rates, Response data: {}", response); + + return response; + } catch (Exception e) { + log.error("Failed to fetch Latest IDR Rates", e); + throw new RuntimeException("Failed to fetch Latest IDR Rates", e); + } + } +} \ No newline at end of file diff --git a/src/main/java/com/example/finance/storage/InMemoryDataStore.java b/src/main/java/com/example/finance/storage/InMemoryDataStore.java new file mode 100644 index 00000000..30aa4e44 --- /dev/null +++ b/src/main/java/com/example/finance/storage/InMemoryDataStore.java @@ -0,0 +1,24 @@ +package com.example.finance.storage; + +import java.util.Collections; +import java.util.Map; + +import org.springframework.stereotype.Component; + +@Component +public class InMemoryDataStore { + + private Map data; + + public void setData(Map data) { + this.data = Collections.unmodifiableMap(data); + } + + public Map getAllData() { + return data; + } + + public Object getData(String key) { + return data.get(key); + } +} diff --git a/src/main/java/com/example/finance/util/SpreadCalculator.java b/src/main/java/com/example/finance/util/SpreadCalculator.java new file mode 100644 index 00000000..afa3e88f --- /dev/null +++ b/src/main/java/com/example/finance/util/SpreadCalculator.java @@ -0,0 +1,34 @@ +package com.example.finance.util; + +import java.math.BigDecimal; +import java.math.RoundingMode; + +import org.slf4j.Logger; +import org.slf4j.LoggerFactory; + +public class SpreadCalculator { + + private static final Logger log = LoggerFactory.getLogger(SpreadCalculator.class); + + + private SpreadCalculator() { + } + + public static double calculateSpreadFactor(String username) { + + int sum = username.chars().sum(); + + return (sum % 1000) / 100000.0; + } + + public static double calculateUsdBuySpread(double rateUsd, String username) { + + double spreadFactor = calculateSpreadFactor(username); + log.info("Spread Factor : " + spreadFactor); + + double result = (1 / rateUsd) * (1 + spreadFactor); + + return BigDecimal.valueOf(result).setScale(5, RoundingMode.HALF_UP) // 5 digit decimal + .doubleValue(); + } +} diff --git a/src/main/resources/META-INF/additional-spring-configuration-metadata.json b/src/main/resources/META-INF/additional-spring-configuration-metadata.json new file mode 100644 index 00000000..97726267 --- /dev/null +++ b/src/main/resources/META-INF/additional-spring-configuration-metadata.json @@ -0,0 +1,5 @@ +{"properties": [{ + "name": "frankfurter.base-url", + "type": "java.lang.String", + "description": "A description for 'frankfurter.base-url'" +}]} \ 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 00000000..c27620b8 --- /dev/null +++ b/src/main/resources/application.yml @@ -0,0 +1,10 @@ +spring: + application: + name: api_finance_data + +frankfurter: + base-url: https://api.frankfurter.app + endpoints: + currencies: /currencies + latest: /latest + historical: /2024-01-01..2024-01-05 diff --git a/src/test/java/com/example/finance/ApiFinanceDataApplicationTests.java b/src/test/java/com/example/finance/ApiFinanceDataApplicationTests.java new file mode 100644 index 00000000..1adf6e77 --- /dev/null +++ b/src/test/java/com/example/finance/ApiFinanceDataApplicationTests.java @@ -0,0 +1,13 @@ +package com.example.finance; + +import org.junit.jupiter.api.Test; +import org.springframework.boot.test.context.SpringBootTest; + +@SpringBootTest +class ApiFinanceDataApplicationTests { + + @Test + void contextLoads() { + } + +} diff --git a/src/test/java/com/example/finance/runner/DataLoaderRunnerTest.java b/src/test/java/com/example/finance/runner/DataLoaderRunnerTest.java new file mode 100644 index 00000000..c568d549 --- /dev/null +++ b/src/test/java/com/example/finance/runner/DataLoaderRunnerTest.java @@ -0,0 +1,29 @@ +package com.example.finance.runner; + +import com.example.finance.storage.InMemoryDataStore; +import org.junit.jupiter.api.Test; +import org.springframework.beans.factory.annotation.Autowired; +import org.springframework.boot.test.context.SpringBootTest; + +import java.util.Map; + +import static org.junit.jupiter.api.Assertions.*; + +@SpringBootTest +class DataLoaderRunnerTest { + + @Autowired + private InMemoryDataStore store; + + @Test + void shouldLoadAllDataOnStartup() { + + Map data = store.getAllData(); + + assertNotNull(data); + + assertNotNull(data.get("latest_idr_rates")); + assertNotNull(data.get("historical_idr_usd")); + assertNotNull(data.get("supported_currencies")); + } +} \ No newline at end of file diff --git a/src/test/java/com/example/finance/service/CurrencyFetcherTest.java b/src/test/java/com/example/finance/service/CurrencyFetcherTest.java new file mode 100644 index 00000000..4537d8b0 --- /dev/null +++ b/src/test/java/com/example/finance/service/CurrencyFetcherTest.java @@ -0,0 +1,46 @@ +package com.example.finance.service; + +import org.junit.jupiter.api.Test; +import org.junit.jupiter.api.extension.ExtendWith; +import org.mockito.InjectMocks; +import org.mockito.Mock; +import org.mockito.junit.jupiter.MockitoExtension; + +import com.example.finance.config.FrankfurterProperties; + +import java.util.HashMap; +import java.util.Map; + +import static org.junit.jupiter.api.Assertions.*; +import static org.mockito.Mockito.*; + +@ExtendWith(MockitoExtension.class) +class CurrencyFetcherTest { + + @Mock + private HitExternalApiService apiService; + + @InjectMocks + private CurrencyFetcher fetcher; + + @Mock + private FrankfurterProperties.Endpoints endpoints; + + @Test + void shouldReturnCurrencies() { + + when(apiService.endpoints()).thenReturn(endpoints); + when(endpoints.getCurrencies()).thenReturn("/currencies"); + + Map mock = new HashMap<>(); + mock.put("USD", "United States Dollar"); + + when(apiService.get(any(), any(), eq(Map.class))) + .thenReturn(mock); + + Object result = fetcher.fetchData(); + + assertNotNull(result); + assertFalse(((Map) result).isEmpty()); + } +} \ No newline at end of file diff --git a/src/test/java/com/example/finance/service/HistoricalFetcherTest.java b/src/test/java/com/example/finance/service/HistoricalFetcherTest.java new file mode 100644 index 00000000..937a7bf5 --- /dev/null +++ b/src/test/java/com/example/finance/service/HistoricalFetcherTest.java @@ -0,0 +1,49 @@ +package com.example.finance.service; + +import org.junit.jupiter.api.Test; +import org.junit.jupiter.api.extension.ExtendWith; +import org.mockito.InjectMocks; +import org.mockito.Mock; +import org.mockito.junit.jupiter.MockitoExtension; + +import com.example.finance.config.FrankfurterProperties; + +import java.util.HashMap; +import java.util.Map; + +import static org.junit.jupiter.api.Assertions.*; +import static org.mockito.Mockito.*; + +@ExtendWith(MockitoExtension.class) +class HistoricalFetcherTest { + + @Mock + private HitExternalApiService apiService; + + @InjectMocks + private HistoricalFetcher fetcher; + + @Mock + private FrankfurterProperties.Endpoints endpoints; + + @Test + void shouldReturnHistoricalData() { + + when(apiService.endpoints()).thenReturn(endpoints); + when(endpoints.getHistorical()).thenReturn("/2024-01-01..2024-01-05"); + + Map rates = new HashMap<>(); + Map usd = new HashMap<>(); + Map mock = new HashMap<>(); + usd.put("USD", 0.000064); + rates.put("2024-01-01", usd); + mock.put("rates", rates); + + when(apiService.get(any(), any(), eq(Map.class))) + .thenReturn(mock); + + Object result = fetcher.fetchData(); + + assertNotNull(result); + } +} \ No newline at end of file diff --git a/src/test/java/com/example/finance/service/LatestRatesFetcherTest.java b/src/test/java/com/example/finance/service/LatestRatesFetcherTest.java new file mode 100644 index 00000000..15991422 --- /dev/null +++ b/src/test/java/com/example/finance/service/LatestRatesFetcherTest.java @@ -0,0 +1,53 @@ +package com.example.finance.service; + +import org.junit.jupiter.api.Test; +import org.junit.jupiter.api.extension.ExtendWith; +import org.mockito.InjectMocks; +import org.mockito.Mock; +import org.mockito.junit.jupiter.MockitoExtension; + +import com.example.finance.config.FrankfurterProperties; + +import java.util.HashMap; +import java.util.Map; + +import static org.junit.jupiter.api.Assertions.*; +import static org.mockito.Mockito.*; + +@ExtendWith(MockitoExtension.class) +class LatestRatesFetcherTest { + + @Mock + private HitExternalApiService apiService; + + @InjectMocks + private LatestRatesFetcher fetcher; + + @Mock + private FrankfurterProperties.Endpoints endpoints; + + @Test + void shouldCalculateSpreadCorrectly() { + + // mock chain + when(apiService.endpoints()).thenReturn(endpoints); + when(endpoints.getLatest()).thenReturn("/latest"); + + // mock response API + Map mockResponse = new HashMap<>(); + Map rates = new HashMap<>(); + rates.put("USD", 0.000064); + + mockResponse.put("rates", rates); + + when(apiService.get(any(), any(), eq(Map.class))).thenReturn(mockResponse); + + // execute + Object result = fetcher.fetchData(); + + Map res = (Map) result; + + // verify + assertNotNull(res.get("USD_BuySpread_IDR")); + } +} \ No newline at end of file