From 0d78b8e0f1a3bd29be09d978e4c9fabbc0244d7e Mon Sep 17 00:00:00 2001 From: NicolasSancho Date: Wed, 23 Jul 2025 11:35:08 +0200 Subject: [PATCH 1/2] Solution by Nicolas Sancho --- similar-products/.gitattributes | 2 + .../.gitattributes:Zone.Identifier | 0 similar-products/.gitignore | 33 +++ similar-products/.gitignore:Zone.Identifier | 0 .../.mvn/wrapper/maven-wrapper.properties | 19 ++ .../maven-wrapper.properties:Zone.Identifier | 0 similar-products/HELP.md:Zone.Identifier | 0 similar-products/mvnw | 259 ++++++++++++++++++ similar-products/mvnw.cmd | 149 ++++++++++ similar-products/mvnw.cmd:Zone.Identifier | 0 similar-products/mvnw:Zone.Identifier | 0 similar-products/pom.xml | 103 +++++++ similar-products/pom.xml:Zone.Identifier | 0 .../SimilarProductsApplication.java | 14 + ...arProductsApplication.java:Zone.Identifier | 0 .../client/ProductApiClient.java | 10 + .../client/ProductApiClientImpl.java | 59 ++++ .../similar_products/config/CacheConfig.java | 28 ++ .../config/ExecutorConfig.java | 16 ++ .../config/RestTemplateConfig.java | 14 + .../controller/ProductController.java | 23 ++ .../similar_products/dto/ApiErrorDTO.java | 11 + .../dto/ProductDetailDTO.java | 21 ++ .../exception/GlobalExceptionHandler.java | 46 ++++ .../exception/NotFoundException.java | 11 + .../service/ProductService.java | 9 + .../service/ProductServiceImpl.java | 34 +++ .../src/main/resources/application.properties | 12 + .../application.properties:Zone.Identifier | 0 .../src/main/resources/application.yml | 12 + .../SimilarProductsApplicationTests.java | 13 + ...ductsApplicationTests.java:Zone.Identifier | 0 32 files changed, 898 insertions(+) create mode 100644 similar-products/.gitattributes create mode 100644 similar-products/.gitattributes:Zone.Identifier create mode 100644 similar-products/.gitignore create mode 100644 similar-products/.gitignore:Zone.Identifier create mode 100644 similar-products/.mvn/wrapper/maven-wrapper.properties create mode 100644 similar-products/.mvn/wrapper/maven-wrapper.properties:Zone.Identifier create mode 100644 similar-products/HELP.md:Zone.Identifier create mode 100755 similar-products/mvnw create mode 100644 similar-products/mvnw.cmd create mode 100644 similar-products/mvnw.cmd:Zone.Identifier create mode 100644 similar-products/mvnw:Zone.Identifier create mode 100644 similar-products/pom.xml create mode 100644 similar-products/pom.xml:Zone.Identifier create mode 100644 similar-products/src/main/java/com/nicolas_sancho/similar_products/SimilarProductsApplication.java create mode 100644 similar-products/src/main/java/com/nicolas_sancho/similar_products/SimilarProductsApplication.java:Zone.Identifier create mode 100644 similar-products/src/main/java/com/nicolas_sancho/similar_products/client/ProductApiClient.java create mode 100644 similar-products/src/main/java/com/nicolas_sancho/similar_products/client/ProductApiClientImpl.java create mode 100644 similar-products/src/main/java/com/nicolas_sancho/similar_products/config/CacheConfig.java create mode 100644 similar-products/src/main/java/com/nicolas_sancho/similar_products/config/ExecutorConfig.java create mode 100644 similar-products/src/main/java/com/nicolas_sancho/similar_products/config/RestTemplateConfig.java create mode 100644 similar-products/src/main/java/com/nicolas_sancho/similar_products/controller/ProductController.java create mode 100644 similar-products/src/main/java/com/nicolas_sancho/similar_products/dto/ApiErrorDTO.java create mode 100644 similar-products/src/main/java/com/nicolas_sancho/similar_products/dto/ProductDetailDTO.java create mode 100644 similar-products/src/main/java/com/nicolas_sancho/similar_products/exception/GlobalExceptionHandler.java create mode 100644 similar-products/src/main/java/com/nicolas_sancho/similar_products/exception/NotFoundException.java create mode 100644 similar-products/src/main/java/com/nicolas_sancho/similar_products/service/ProductService.java create mode 100644 similar-products/src/main/java/com/nicolas_sancho/similar_products/service/ProductServiceImpl.java create mode 100644 similar-products/src/main/resources/application.properties create mode 100644 similar-products/src/main/resources/application.properties:Zone.Identifier create mode 100644 similar-products/src/main/resources/application.yml create mode 100644 similar-products/src/test/java/com/nicolas_sancho/similar_products/SimilarProductsApplicationTests.java create mode 100644 similar-products/src/test/java/com/nicolas_sancho/similar_products/SimilarProductsApplicationTests.java:Zone.Identifier diff --git a/similar-products/.gitattributes b/similar-products/.gitattributes new file mode 100644 index 00000000..3b41682a --- /dev/null +++ b/similar-products/.gitattributes @@ -0,0 +1,2 @@ +/mvnw text eol=lf +*.cmd text eol=crlf diff --git a/similar-products/.gitattributes:Zone.Identifier b/similar-products/.gitattributes:Zone.Identifier new file mode 100644 index 00000000..e69de29b diff --git a/similar-products/.gitignore b/similar-products/.gitignore new file mode 100644 index 00000000..667aaef0 --- /dev/null +++ b/similar-products/.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/similar-products/.gitignore:Zone.Identifier b/similar-products/.gitignore:Zone.Identifier new file mode 100644 index 00000000..e69de29b diff --git a/similar-products/.mvn/wrapper/maven-wrapper.properties b/similar-products/.mvn/wrapper/maven-wrapper.properties new file mode 100644 index 00000000..2f94e616 --- /dev/null +++ b/similar-products/.mvn/wrapper/maven-wrapper.properties @@ -0,0 +1,19 @@ +# 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. +wrapperVersion=3.3.2 +distributionType=only-script +distributionUrl=https://repo.maven.apache.org/maven2/org/apache/maven/apache-maven/3.9.10/apache-maven-3.9.10-bin.zip diff --git a/similar-products/.mvn/wrapper/maven-wrapper.properties:Zone.Identifier b/similar-products/.mvn/wrapper/maven-wrapper.properties:Zone.Identifier new file mode 100644 index 00000000..e69de29b diff --git a/similar-products/HELP.md:Zone.Identifier b/similar-products/HELP.md:Zone.Identifier new file mode 100644 index 00000000..e69de29b diff --git a/similar-products/mvnw b/similar-products/mvnw new file mode 100755 index 00000000..19529ddf --- /dev/null +++ b/similar-products/mvnw @@ -0,0 +1,259 @@ +#!/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 3.3.2 +# +# 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:]' +} + +# 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 "${value-}") ;; + esac +done <"${0%/*}/.mvn/wrapper/maven-wrapper.properties" +[ -n "${distributionUrl-}" ] || die "cannot read distributionUrl property in ${0%/*}/.mvn/wrapper/maven-wrapper.properties" + +case "${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${0##*/mvnw}" _MVNW_REPO_PATTERN=/org/apache/maven/ ;; +esac + +# apply MVNW_REPOURL and calculate MAVEN_HOME +# maven home pattern: ~/.m2/wrapper/dists/{apache-maven-,maven-mvnd--}/ +[ -z "${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 +printf %s\\n "$distributionUrl" >"$TMP_DOWNLOAD_DIR/$distributionUrlNameMain/mvnw.url" +mv -- "$TMP_DOWNLOAD_DIR/$distributionUrlNameMain" "$MAVEN_HOME" || [ -d "$MAVEN_HOME" ] || die "fail to move MAVEN_HOME" + +clean || : +exec_maven "$@" diff --git a/similar-products/mvnw.cmd b/similar-products/mvnw.cmd new file mode 100644 index 00000000..249bdf38 --- /dev/null +++ b/similar-products/mvnw.cmd @@ -0,0 +1,149 @@ +<# : 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 3.3.2 +@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) { "/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_HOME_PARENT = "$HOME/.m2/wrapper/dists/$distributionUrlNameMain" +if ($env:MAVEN_USER_HOME) { + $MAVEN_HOME_PARENT = "$env:MAVEN_USER_HOME/wrapper/dists/$distributionUrlNameMain" +} +$MAVEN_HOME_NAME = ([System.Security.Cryptography.MD5]::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 +Rename-Item -Path "$TMP_DOWNLOAD_DIR/$distributionUrlNameMain" -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/similar-products/mvnw.cmd:Zone.Identifier b/similar-products/mvnw.cmd:Zone.Identifier new file mode 100644 index 00000000..e69de29b diff --git a/similar-products/mvnw:Zone.Identifier b/similar-products/mvnw:Zone.Identifier new file mode 100644 index 00000000..e69de29b diff --git a/similar-products/pom.xml b/similar-products/pom.xml new file mode 100644 index 00000000..55814998 --- /dev/null +++ b/similar-products/pom.xml @@ -0,0 +1,103 @@ + + + 4.0.0 + + org.springframework.boot + spring-boot-starter-parent + 3.5.3 + + + com.nicolas-sancho + similar-products + 0.0.1-SNAPSHOT + similar-products + Demo project for Spring Boot + + + + + + + + + + + + + + + 21 + + + + org.springframework.boot + spring-boot-starter-actuator + + + org.springframework.boot + spring-boot-starter-web + + + + org.springframework.boot + spring-boot-devtools + runtime + true + + + org.projectlombok + lombok + true + + + io.github.resilience4j + resilience4j-spring-boot3 + 2.1.0 + + + org.springframework.boot + spring-boot-starter-cache + + + com.github.ben-manes.caffeine + caffeine + 3.1.8 + + + org.springframework.boot + spring-boot-starter-test + test + + + + + + + org.apache.maven.plugins + maven-compiler-plugin + + + + org.projectlombok + lombok + + + + + + org.springframework.boot + spring-boot-maven-plugin + + + + org.projectlombok + lombok + + + + + + + + diff --git a/similar-products/pom.xml:Zone.Identifier b/similar-products/pom.xml:Zone.Identifier new file mode 100644 index 00000000..e69de29b diff --git a/similar-products/src/main/java/com/nicolas_sancho/similar_products/SimilarProductsApplication.java b/similar-products/src/main/java/com/nicolas_sancho/similar_products/SimilarProductsApplication.java new file mode 100644 index 00000000..2350c9e4 --- /dev/null +++ b/similar-products/src/main/java/com/nicolas_sancho/similar_products/SimilarProductsApplication.java @@ -0,0 +1,14 @@ +package com.nicolas_sancho.similar_products; + +import org.springframework.boot.SpringApplication; +import org.springframework.boot.autoconfigure.SpringBootApplication; +import org.springframework.cache.annotation.EnableCaching; + +@SpringBootApplication +@EnableCaching +public class SimilarProductsApplication { + + public static void main(String[] args) { + SpringApplication.run(SimilarProductsApplication.class, args); + } +} diff --git a/similar-products/src/main/java/com/nicolas_sancho/similar_products/SimilarProductsApplication.java:Zone.Identifier b/similar-products/src/main/java/com/nicolas_sancho/similar_products/SimilarProductsApplication.java:Zone.Identifier new file mode 100644 index 00000000..e69de29b diff --git a/similar-products/src/main/java/com/nicolas_sancho/similar_products/client/ProductApiClient.java b/similar-products/src/main/java/com/nicolas_sancho/similar_products/client/ProductApiClient.java new file mode 100644 index 00000000..51caa042 --- /dev/null +++ b/similar-products/src/main/java/com/nicolas_sancho/similar_products/client/ProductApiClient.java @@ -0,0 +1,10 @@ +package com.nicolas_sancho.similar_products.client; + +import com.nicolas_sancho.similar_products.dto.ProductDetailDTO; + +import java.util.List; + +public interface ProductApiClient { + List getSimilarIds(String productId); + ProductDetailDTO getProductDetail(String productId); +} diff --git a/similar-products/src/main/java/com/nicolas_sancho/similar_products/client/ProductApiClientImpl.java b/similar-products/src/main/java/com/nicolas_sancho/similar_products/client/ProductApiClientImpl.java new file mode 100644 index 00000000..7c52baa7 --- /dev/null +++ b/similar-products/src/main/java/com/nicolas_sancho/similar_products/client/ProductApiClientImpl.java @@ -0,0 +1,59 @@ +package com.nicolas_sancho.similar_products.client; + +import com.nicolas_sancho.similar_products.dto.ProductDetailDTO; +import org.springframework.beans.factory.annotation.Value; +import com.nicolas_sancho.similar_products.exception.NotFoundException; +import io.github.resilience4j.retry.annotation.Retry; +import lombok.RequiredArgsConstructor; +import org.springframework.cache.annotation.Cacheable; +import org.springframework.stereotype.Service; +import org.springframework.web.client.HttpClientErrorException; +import org.springframework.web.client.RestTemplate; + +import java.util.Arrays; +import java.util.List; + +@Service +@RequiredArgsConstructor +public class ProductApiClientImpl implements ProductApiClient { + + private final RestTemplate restTemplate; + + @Value("${external.api.base-url}") + private String baseUrl; + + @Cacheable(value = "similar-ids-cache", key = "#productId") + @Override + @Retry(name = "similarIds", fallbackMethod = "getSimilarIdsFallback") + public List getSimilarIds(String productId) { + try { + String[] ids = restTemplate.getForObject( + baseUrl + "/product/" + productId + "/similarids", + String[].class); + return Arrays.asList(ids); + } catch (HttpClientErrorException.NotFound e) { + throw new NotFoundException("Product " + productId + " not found"); + } + } + + public List getSimilarIdsFallback(String productId, Exception ex) { + throw new NotFoundException("Failed to retrieve similar products for " + productId + " after retries"); + } + + @Cacheable(value = "product-details-cache", key = "#productId") + @Override + @Retry(name = "productDetail", fallbackMethod = "getProductDetailFallback") + public ProductDetailDTO getProductDetail(String productId) { + try { + return restTemplate.getForObject( + baseUrl + "/product/" + productId, + ProductDetailDTO.class); + } catch (HttpClientErrorException.NotFound e) { + throw new NotFoundException("Product " + productId + " not found"); + } + } + + public ProductDetailDTO getProductDetailFallback(String productId, Exception ex) { + throw new NotFoundException("Failed to retrieve product details for " + productId + " after retries"); + } +} diff --git a/similar-products/src/main/java/com/nicolas_sancho/similar_products/config/CacheConfig.java b/similar-products/src/main/java/com/nicolas_sancho/similar_products/config/CacheConfig.java new file mode 100644 index 00000000..52b9680a --- /dev/null +++ b/similar-products/src/main/java/com/nicolas_sancho/similar_products/config/CacheConfig.java @@ -0,0 +1,28 @@ +package com.nicolas_sancho.similar_products.config; + +import com.github.benmanes.caffeine.cache.Caffeine; +import org.springframework.cache.CacheManager; +import org.springframework.cache.annotation.EnableCaching; +import org.springframework.cache.caffeine.CaffeineCacheManager; +import org.springframework.context.annotation.Bean; +import org.springframework.context.annotation.Configuration; + +import java.util.concurrent.TimeUnit; + +@Configuration +@EnableCaching +public class CacheConfig { + + @Bean + public CacheManager cacheManager() { + CaffeineCacheManager cacheManager = new CaffeineCacheManager( + "product-details-cache", "similar-ids-cache" + ); + cacheManager.setCaffeine( + Caffeine.newBuilder() + .expireAfterWrite(5, TimeUnit.MINUTES) + .maximumSize(1000) + ); + return cacheManager; + } +} diff --git a/similar-products/src/main/java/com/nicolas_sancho/similar_products/config/ExecutorConfig.java b/similar-products/src/main/java/com/nicolas_sancho/similar_products/config/ExecutorConfig.java new file mode 100644 index 00000000..5ed23a84 --- /dev/null +++ b/similar-products/src/main/java/com/nicolas_sancho/similar_products/config/ExecutorConfig.java @@ -0,0 +1,16 @@ +package com.nicolas_sancho.similar_products.config; + +import org.springframework.context.annotation.Bean; +import org.springframework.context.annotation.Configuration; + +import java.util.concurrent.ExecutorService; +import java.util.concurrent.Executors; + +@Configuration +public class ExecutorConfig { + + @Bean + public ExecutorService executorService() { + return Executors.newFixedThreadPool(50); + } +} diff --git a/similar-products/src/main/java/com/nicolas_sancho/similar_products/config/RestTemplateConfig.java b/similar-products/src/main/java/com/nicolas_sancho/similar_products/config/RestTemplateConfig.java new file mode 100644 index 00000000..daf68311 --- /dev/null +++ b/similar-products/src/main/java/com/nicolas_sancho/similar_products/config/RestTemplateConfig.java @@ -0,0 +1,14 @@ +package com.nicolas_sancho.similar_products.config; + +import org.springframework.context.annotation.Bean; +import org.springframework.context.annotation.Configuration; +import org.springframework.web.client.RestTemplate; + +@Configuration +public class RestTemplateConfig { + + @Bean + public RestTemplate restTemplate() { + return new RestTemplate(); + } +} diff --git a/similar-products/src/main/java/com/nicolas_sancho/similar_products/controller/ProductController.java b/similar-products/src/main/java/com/nicolas_sancho/similar_products/controller/ProductController.java new file mode 100644 index 00000000..bb3cc3a6 --- /dev/null +++ b/similar-products/src/main/java/com/nicolas_sancho/similar_products/controller/ProductController.java @@ -0,0 +1,23 @@ +package com.nicolas_sancho.similar_products.controller; + +import com.nicolas_sancho.similar_products.dto.ProductDetailDTO; +import com.nicolas_sancho.similar_products.service.ProductService; +import lombok.RequiredArgsConstructor; +import org.springframework.http.ResponseEntity; +import org.springframework.web.bind.annotation.*; + +import java.util.List; + +@RestController +@RequestMapping("/product") +@RequiredArgsConstructor +public class ProductController { + + private final ProductService productService; + + @GetMapping("/{productId}/similar") + public ResponseEntity> getSimilarProducts(@PathVariable String productId) { + List similarProducts = productService.getSimilarProducts(productId); + return ResponseEntity.ok(similarProducts); + } +} diff --git a/similar-products/src/main/java/com/nicolas_sancho/similar_products/dto/ApiErrorDTO.java b/similar-products/src/main/java/com/nicolas_sancho/similar_products/dto/ApiErrorDTO.java new file mode 100644 index 00000000..451a4b68 --- /dev/null +++ b/similar-products/src/main/java/com/nicolas_sancho/similar_products/dto/ApiErrorDTO.java @@ -0,0 +1,11 @@ +package com.nicolas_sancho.similar_products.dto; + +import java.time.ZonedDateTime; + +public record ApiErrorDTO( + ZonedDateTime timestamp, + int status, + String error, + String message, + String path +) {} diff --git a/similar-products/src/main/java/com/nicolas_sancho/similar_products/dto/ProductDetailDTO.java b/similar-products/src/main/java/com/nicolas_sancho/similar_products/dto/ProductDetailDTO.java new file mode 100644 index 00000000..3e805b63 --- /dev/null +++ b/similar-products/src/main/java/com/nicolas_sancho/similar_products/dto/ProductDetailDTO.java @@ -0,0 +1,21 @@ +package com.nicolas_sancho.similar_products.dto; + +import lombok.AllArgsConstructor; +import lombok.Builder; +import lombok.Data; +import lombok.NoArgsConstructor; + +/** + * Represents a single product detail. + */ +@Data +@Builder +@NoArgsConstructor +@AllArgsConstructor +public class ProductDetailDTO { + + private String id; // required + private String name; // required + private Double price; // required + private Boolean availability; // required +} diff --git a/similar-products/src/main/java/com/nicolas_sancho/similar_products/exception/GlobalExceptionHandler.java b/similar-products/src/main/java/com/nicolas_sancho/similar_products/exception/GlobalExceptionHandler.java new file mode 100644 index 00000000..a60aa6fb --- /dev/null +++ b/similar-products/src/main/java/com/nicolas_sancho/similar_products/exception/GlobalExceptionHandler.java @@ -0,0 +1,46 @@ +package com.nicolas_sancho.similar_products.exception; + +import com.nicolas_sancho.similar_products.dto.ApiErrorDTO; +import jakarta.servlet.http.HttpServletRequest; +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 java.time.ZonedDateTime; + +@RestControllerAdvice +public class GlobalExceptionHandler { + + @ExceptionHandler(NotFoundException.class) + public ResponseEntity handleNotFound( + NotFoundException ex, + HttpServletRequest request) { + + ApiErrorDTO error = new ApiErrorDTO( + ZonedDateTime.now(), + HttpStatus.NOT_FOUND.value(), + HttpStatus.NOT_FOUND.getReasonPhrase(), + ex.getMessage(), + request.getRequestURI() + ); + + return ResponseEntity.status(HttpStatus.NOT_FOUND).body(error); + } + + @ExceptionHandler(Exception.class) + public ResponseEntity handleGeneric( + Exception ex, + HttpServletRequest request) { + + ApiErrorDTO error = new ApiErrorDTO( + ZonedDateTime.now(), + HttpStatus.INTERNAL_SERVER_ERROR.value(), + HttpStatus.INTERNAL_SERVER_ERROR.getReasonPhrase(), + ex.getMessage(), + request.getRequestURI() + ); + + return ResponseEntity.status(HttpStatus.INTERNAL_SERVER_ERROR).body(error); + } +} diff --git a/similar-products/src/main/java/com/nicolas_sancho/similar_products/exception/NotFoundException.java b/similar-products/src/main/java/com/nicolas_sancho/similar_products/exception/NotFoundException.java new file mode 100644 index 00000000..7e22d18d --- /dev/null +++ b/similar-products/src/main/java/com/nicolas_sancho/similar_products/exception/NotFoundException.java @@ -0,0 +1,11 @@ +package com.nicolas_sancho.similar_products.exception; + +import org.springframework.http.HttpStatus; +import org.springframework.web.bind.annotation.ResponseStatus; + +@ResponseStatus(HttpStatus.NOT_FOUND) +public class NotFoundException extends RuntimeException { + public NotFoundException(String message) { + super(message); + } +} diff --git a/similar-products/src/main/java/com/nicolas_sancho/similar_products/service/ProductService.java b/similar-products/src/main/java/com/nicolas_sancho/similar_products/service/ProductService.java new file mode 100644 index 00000000..5379b747 --- /dev/null +++ b/similar-products/src/main/java/com/nicolas_sancho/similar_products/service/ProductService.java @@ -0,0 +1,9 @@ +package com.nicolas_sancho.similar_products.service; + +import com.nicolas_sancho.similar_products.dto.ProductDetailDTO; + +import java.util.List; + +public interface ProductService { + List getSimilarProducts(String productId); +} diff --git a/similar-products/src/main/java/com/nicolas_sancho/similar_products/service/ProductServiceImpl.java b/similar-products/src/main/java/com/nicolas_sancho/similar_products/service/ProductServiceImpl.java new file mode 100644 index 00000000..8b4434f6 --- /dev/null +++ b/similar-products/src/main/java/com/nicolas_sancho/similar_products/service/ProductServiceImpl.java @@ -0,0 +1,34 @@ +package com.nicolas_sancho.similar_products.service; + +import com.nicolas_sancho.similar_products.client.ProductApiClient; +import com.nicolas_sancho.similar_products.dto.ProductDetailDTO; +import lombok.RequiredArgsConstructor; +import org.springframework.stereotype.Service; + +import java.util.List; +import java.util.concurrent.CompletableFuture; +import java.util.concurrent.ExecutorService; +import java.util.stream.Collectors; + +@Service +@RequiredArgsConstructor +public class ProductServiceImpl implements ProductService { + + private final ProductApiClient productApiClient; + private final ExecutorService executorService; + + @Override + public List getSimilarProducts(String productId) { + List similarIds = productApiClient.getSimilarIds(productId); + + List> futures = similarIds.stream() + .map(id -> CompletableFuture.supplyAsync( + () -> productApiClient.getProductDetail(id), + executorService)) + .toList(); + + return futures.stream() + .map(CompletableFuture::join) + .collect(Collectors.toList()); + } +} diff --git a/similar-products/src/main/resources/application.properties b/similar-products/src/main/resources/application.properties new file mode 100644 index 00000000..76c89ffe --- /dev/null +++ b/similar-products/src/main/resources/application.properties @@ -0,0 +1,12 @@ +spring.application.name=similar-products + +# === Server === +server.port=5000 + +# === External API === +external.api.base-url=http://localhost:3001 + +spring.cache.type=caffeine + +# Cache eviction interval in milliseconds (e.g., 1 minute) +cache.product-detail.ttl=60000 \ No newline at end of file diff --git a/similar-products/src/main/resources/application.properties:Zone.Identifier b/similar-products/src/main/resources/application.properties:Zone.Identifier new file mode 100644 index 00000000..e69de29b diff --git a/similar-products/src/main/resources/application.yml b/similar-products/src/main/resources/application.yml new file mode 100644 index 00000000..c88c50a6 --- /dev/null +++ b/similar-products/src/main/resources/application.yml @@ -0,0 +1,12 @@ +server: + port: 5000 + +resilience4j: + retry: + instances: + similarIds: + max-attempts: 3 + wait-duration: 500ms + productDetail: + max-attempts: 3 + wait-duration: 500ms diff --git a/similar-products/src/test/java/com/nicolas_sancho/similar_products/SimilarProductsApplicationTests.java b/similar-products/src/test/java/com/nicolas_sancho/similar_products/SimilarProductsApplicationTests.java new file mode 100644 index 00000000..62979526 --- /dev/null +++ b/similar-products/src/test/java/com/nicolas_sancho/similar_products/SimilarProductsApplicationTests.java @@ -0,0 +1,13 @@ +package com.nicolas_sancho.similar_products; + +import org.junit.jupiter.api.Test; +import org.springframework.boot.test.context.SpringBootTest; + +@SpringBootTest +class SimilarProductsApplicationTests { + + @Test + void contextLoads() { + } + +} diff --git a/similar-products/src/test/java/com/nicolas_sancho/similar_products/SimilarProductsApplicationTests.java:Zone.Identifier b/similar-products/src/test/java/com/nicolas_sancho/similar_products/SimilarProductsApplicationTests.java:Zone.Identifier new file mode 100644 index 00000000..e69de29b From bfa0c81140758ee05905d4cd94e296929e13a4d3 Mon Sep 17 00:00:00 2001 From: NicolasSancho Date: Wed, 23 Jul 2025 14:51:09 +0200 Subject: [PATCH 2/2] Adding readme file --- similar-products/readme.md | 52 ++++++++++++++++++++++++++++++++++++++ 1 file changed, 52 insertions(+) create mode 100644 similar-products/readme.md diff --git a/similar-products/readme.md b/similar-products/readme.md new file mode 100644 index 00000000..cfd3a770 --- /dev/null +++ b/similar-products/readme.md @@ -0,0 +1,52 @@ +# πŸ“¦ Similar Products API + +A Spring Boot backend service that provides a single endpoint to retrieve similar products for a given product ID. Designed as part of the ITX Backend Test. + +## πŸš€ Features + +- REST API exposing: + - Fetching a list of similar products +- In-memory caching layer with **1 hour TTL** +- Custom thread pool executor to avoid blocking the main thread on I/O +- Resiliency with [Resilience4j](https://resilience4j.readme.io/) (e.g., timeouts, circuit breakers) + +--- + +## πŸ“š Why these decisions? + +### 🧠 Why not Reactive Programming? + +Although Spring WebFlux is a good option, in this specific use case: +- The data source is not truly reactive. +- The complexity of reactive flows was unnecessary for such a small and predictable workload. +- A well-configured thread pool and caching already cover the performance needs. + +### πŸ—‚ Caching with Caffeine + +We used **Caffeine** (`spring-boot-starter-cache` + `caffeine`) for: +- Client-side caching with a **1-hour expiration policy**. +- Avoiding unnecessary calls to the upstream API. +- Very efficient memory footprint. + +### πŸ”— Custom Thread Pool + +To avoid blocking `@Async` or scheduled tasks on the common pool, we created a dedicated **ExecutorConfig** to fine-tune: +- Core/maximum pool size +- Queue capacity +- Rejection policy + +This ensures that spikes in load won’t starve other processes and improves throughput predictability. + +--- + +## πŸ§ͺ How to run + +### Prerequisites + +- Java 21+ +- Maven 3.8+ + +### Run locally + +```bash +mvn clean spring-boot:run