diff --git a/.classpath b/.classpath new file mode 100644 index 0000000..3f3893a --- /dev/null +++ b/.classpath @@ -0,0 +1,6 @@ + + + + + + diff --git a/.idea/material_theme_project_new.xml b/.idea/material_theme_project_new.xml new file mode 100644 index 0000000..1bd0f62 --- /dev/null +++ b/.idea/material_theme_project_new.xml @@ -0,0 +1,12 @@ + + + + + + \ No newline at end of file diff --git a/.idea/misc.xml b/.idea/misc.xml new file mode 100644 index 0000000..cefb937 --- /dev/null +++ b/.idea/misc.xml @@ -0,0 +1,6 @@ + + + + + + \ No newline at end of file diff --git a/.idea/vcs.xml b/.idea/vcs.xml new file mode 100644 index 0000000..35eb1dd --- /dev/null +++ b/.idea/vcs.xml @@ -0,0 +1,6 @@ + + + + + + \ No newline at end of file diff --git a/.idea/workspace.xml b/.idea/workspace.xml new file mode 100644 index 0000000..1365bbc --- /dev/null +++ b/.idea/workspace.xml @@ -0,0 +1,66 @@ + + + + + + + + + + + + + + + + + + + + { + "associatedIndex": 4 +} + + + + + + + + + + + + + + + + + + + 1735741589911 + + + + \ No newline at end of file diff --git a/.project b/.project new file mode 100644 index 0000000..1d3b5b4 --- /dev/null +++ b/.project @@ -0,0 +1,17 @@ + + + redis_1st_pre + + + + + + org.eclipse.jdt.core.javabuilder + + + + + + org.eclipse.jdt.core.javanature + + diff --git a/test2/.gitignore b/test2/.gitignore new file mode 100644 index 0000000..b63da45 --- /dev/null +++ b/test2/.gitignore @@ -0,0 +1,42 @@ +.gradle +build/ +!gradle/wrapper/gradle-wrapper.jar +!**/src/main/**/build/ +!**/src/test/**/build/ + +### IntelliJ IDEA ### +.idea/modules.xml +.idea/jarRepositories.xml +.idea/compiler.xml +.idea/libraries/ +*.iws +*.iml +*.ipr +out/ +!**/src/main/**/out/ +!**/src/test/**/out/ + +### Eclipse ### +.apt_generated +.classpath +.factorypath +.project +.settings +.springBeans +.sts4-cache +bin/ +!**/src/main/**/bin/ +!**/src/test/**/bin/ + +### NetBeans ### +/nbproject/private/ +/nbbuild/ +/dist/ +/nbdist/ +/.nb-gradle/ + +### VS Code ### +.vscode/ + +### Mac OS ### +.DS_Store \ No newline at end of file diff --git a/test2/.idea/.gitignore b/test2/.idea/.gitignore new file mode 100644 index 0000000..26d3352 --- /dev/null +++ b/test2/.idea/.gitignore @@ -0,0 +1,3 @@ +# Default ignored files +/shelf/ +/workspace.xml diff --git a/test2/.idea/gradle.xml b/test2/.idea/gradle.xml new file mode 100644 index 0000000..2a65317 --- /dev/null +++ b/test2/.idea/gradle.xml @@ -0,0 +1,17 @@ + + + + + + + \ No newline at end of file diff --git a/test2/.idea/material_theme_project_new.xml b/test2/.idea/material_theme_project_new.xml new file mode 100644 index 0000000..1bd0f62 --- /dev/null +++ b/test2/.idea/material_theme_project_new.xml @@ -0,0 +1,12 @@ + + + + + + \ No newline at end of file diff --git a/test2/.idea/misc.xml b/test2/.idea/misc.xml new file mode 100644 index 0000000..acdb18a --- /dev/null +++ b/test2/.idea/misc.xml @@ -0,0 +1,7 @@ + + + + + + + \ No newline at end of file diff --git a/test2/.idea/vcs.xml b/test2/.idea/vcs.xml new file mode 100644 index 0000000..6c0b863 --- /dev/null +++ b/test2/.idea/vcs.xml @@ -0,0 +1,6 @@ + + + + + + \ No newline at end of file diff --git a/test2/build.gradle b/test2/build.gradle new file mode 100644 index 0000000..906201d --- /dev/null +++ b/test2/build.gradle @@ -0,0 +1,24 @@ +plugins { + id 'java' +} + +group = 'org.example' +version = '1.0-SNAPSHOT' + +repositories { + mavenCentral() +} + +dependencies { + testImplementation platform('org.junit:junit-bom:5.10.0') + testImplementation 'org.junit.jupiter:junit-jupiter' + testImplementation 'org.junit.jupiter:junit-jupiter-api:5.6.0' + testRuntimeOnly 'org.junit.jupiter:junit-jupiter-engine' + compileOnly 'org.projectlombok:lombok:1.18.30' + annotationProcessor 'org.projectlombok:lombok:1.18.30' + implementation 'ch.qos.logback:logback-classic:1.4.11' +} + +test { + useJUnitPlatform() +} \ No newline at end of file diff --git a/test2/gradle/wrapper/gradle-wrapper.jar b/test2/gradle/wrapper/gradle-wrapper.jar new file mode 100644 index 0000000..249e583 Binary files /dev/null and b/test2/gradle/wrapper/gradle-wrapper.jar differ diff --git a/test2/gradle/wrapper/gradle-wrapper.properties b/test2/gradle/wrapper/gradle-wrapper.properties new file mode 100644 index 0000000..2c16cb2 --- /dev/null +++ b/test2/gradle/wrapper/gradle-wrapper.properties @@ -0,0 +1,6 @@ +#Wed Jan 01 23:47:45 KST 2025 +distributionBase=GRADLE_USER_HOME +distributionPath=wrapper/dists +distributionUrl=https\://services.gradle.org/distributions/gradle-8.10-bin.zip +zipStoreBase=GRADLE_USER_HOME +zipStorePath=wrapper/dists diff --git a/test2/gradlew b/test2/gradlew new file mode 100644 index 0000000..1b6c787 --- /dev/null +++ b/test2/gradlew @@ -0,0 +1,234 @@ +#!/bin/sh + +# +# Copyright © 2015-2021 the original authors. +# +# Licensed under the Apache License, Version 2.0 (the "License"); +# you may not use this file except in compliance with the License. +# You may obtain a copy of the License at +# +# https://www.apache.org/licenses/LICENSE-2.0 +# +# Unless required by applicable law or agreed to in writing, software +# distributed under the License is distributed on an "AS IS" BASIS, +# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +# See the License for the specific language governing permissions and +# limitations under the License. +# + +############################################################################## +# +# Gradle start up script for POSIX generated by Gradle. +# +# Important for running: +# +# (1) You need a POSIX-compliant shell to run this script. If your /bin/sh is +# noncompliant, but you have some other compliant shell such as ksh or +# bash, then to run this script, type that shell name before the whole +# command line, like: +# +# ksh Gradle +# +# Busybox and similar reduced shells will NOT work, because this script +# requires all of these POSIX shell features: +# * functions; +# * expansions «$var», «${var}», «${var:-default}», «${var+SET}», +# «${var#prefix}», «${var%suffix}», and «$( cmd )»; +# * compound commands having a testable exit status, especially «case»; +# * various built-in commands including «command», «set», and «ulimit». +# +# Important for patching: +# +# (2) This script targets any POSIX shell, so it avoids extensions provided +# by Bash, Ksh, etc; in particular arrays are avoided. +# +# The "traditional" practice of packing multiple parameters into a +# space-separated string is a well documented source of bugs and security +# problems, so this is (mostly) avoided, by progressively accumulating +# options in "$@", and eventually passing that to Java. +# +# Where the inherited environment variables (DEFAULT_JVM_OPTS, JAVA_OPTS, +# and GRADLE_OPTS) rely on word-splitting, this is performed explicitly; +# see the in-line comments for details. +# +# There are tweaks for specific operating systems such as AIX, CygWin, +# Darwin, MinGW, and NonStop. +# +# (3) This script is generated from the Groovy template +# https://github.com/gradle/gradle/blob/master/subprojects/plugins/src/main/resources/org/gradle/api/internal/plugins/unixStartScript.txt +# within the Gradle project. +# +# You can find Gradle at https://github.com/gradle/gradle/. +# +############################################################################## + +# Attempt to set APP_HOME + +# Resolve links: $0 may be a link +app_path=$0 + +# Need this for daisy-chained symlinks. +while + APP_HOME=${app_path%"${app_path##*/}"} # leaves a trailing /; empty if no leading path + [ -h "$app_path" ] +do + ls=$( ls -ld "$app_path" ) + link=${ls#*' -> '} + case $link in #( + /*) app_path=$link ;; #( + *) app_path=$APP_HOME$link ;; + esac +done + +APP_HOME=$( cd "${APP_HOME:-./}" && pwd -P ) || exit + +APP_NAME="Gradle" +APP_BASE_NAME=${0##*/} + +# Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script. +DEFAULT_JVM_OPTS='"-Xmx64m" "-Xms64m"' + +# Use the maximum available, or set MAX_FD != -1 to use that value. +MAX_FD=maximum + +warn () { + echo "$*" +} >&2 + +die () { + echo + echo "$*" + echo + exit 1 +} >&2 + +# OS specific support (must be 'true' or 'false'). +cygwin=false +msys=false +darwin=false +nonstop=false +case "$( uname )" in #( + CYGWIN* ) cygwin=true ;; #( + Darwin* ) darwin=true ;; #( + MSYS* | MINGW* ) msys=true ;; #( + NONSTOP* ) nonstop=true ;; +esac + +CLASSPATH=$APP_HOME/gradle/wrapper/gradle-wrapper.jar + + +# Determine the Java command to use to start the JVM. +if [ -n "$JAVA_HOME" ] ; then + if [ -x "$JAVA_HOME/jre/sh/java" ] ; then + # IBM's JDK on AIX uses strange locations for the executables + JAVACMD=$JAVA_HOME/jre/sh/java + else + JAVACMD=$JAVA_HOME/bin/java + fi + if [ ! -x "$JAVACMD" ] ; then + die "ERROR: JAVA_HOME is set to an invalid directory: $JAVA_HOME + +Please set the JAVA_HOME variable in your environment to match the +location of your Java installation." + fi +else + JAVACMD=java + which java >/dev/null 2>&1 || die "ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH. + +Please set the JAVA_HOME variable in your environment to match the +location of your Java installation." +fi + +# Increase the maximum file descriptors if we can. +if ! "$cygwin" && ! "$darwin" && ! "$nonstop" ; then + case $MAX_FD in #( + max*) + MAX_FD=$( ulimit -H -n ) || + warn "Could not query maximum file descriptor limit" + esac + case $MAX_FD in #( + '' | soft) :;; #( + *) + ulimit -n "$MAX_FD" || + warn "Could not set maximum file descriptor limit to $MAX_FD" + esac +fi + +# Collect all arguments for the java command, stacking in reverse order: +# * args from the command line +# * the main class name +# * -classpath +# * -D...appname settings +# * --module-path (only if needed) +# * DEFAULT_JVM_OPTS, JAVA_OPTS, and GRADLE_OPTS environment variables. + +# For Cygwin or MSYS, switch paths to Windows format before running java +if "$cygwin" || "$msys" ; then + APP_HOME=$( cygpath --path --mixed "$APP_HOME" ) + CLASSPATH=$( cygpath --path --mixed "$CLASSPATH" ) + + JAVACMD=$( cygpath --unix "$JAVACMD" ) + + # Now convert the arguments - kludge to limit ourselves to /bin/sh + for arg do + if + case $arg in #( + -*) false ;; # don't mess with options #( + /?*) t=${arg#/} t=/${t%%/*} # looks like a POSIX filepath + [ -e "$t" ] ;; #( + *) false ;; + esac + then + arg=$( cygpath --path --ignore --mixed "$arg" ) + fi + # Roll the args list around exactly as many times as the number of + # args, so each arg winds up back in the position where it started, but + # possibly modified. + # + # NB: a `for` loop captures its iteration list before it begins, so + # changing the positional parameters here affects neither the number of + # iterations, nor the values presented in `arg`. + shift # remove old arg + set -- "$@" "$arg" # push replacement arg + done +fi + +# Collect all arguments for the java command; +# * $DEFAULT_JVM_OPTS, $JAVA_OPTS, and $GRADLE_OPTS can contain fragments of +# shell script including quotes and variable substitutions, so put them in +# double quotes to make sure that they get re-expanded; and +# * put everything else in single quotes, so that it's not re-expanded. + +set -- \ + "-Dorg.gradle.appname=$APP_BASE_NAME" \ + -classpath "$CLASSPATH" \ + org.gradle.wrapper.GradleWrapperMain \ + "$@" + +# Use "xargs" to parse quoted args. +# +# With -n1 it outputs one arg per line, with the quotes and backslashes removed. +# +# In Bash we could simply go: +# +# readarray ARGS < <( xargs -n1 <<<"$var" ) && +# set -- "${ARGS[@]}" "$@" +# +# but POSIX shell has neither arrays nor command substitution, so instead we +# post-process each arg (as a line of input to sed) to backslash-escape any +# character that might be a shell metacharacter, then use eval to reverse +# that process (while maintaining the separation between arguments), and wrap +# the whole thing up as a single "set" statement. +# +# This will of course break if any of these variables contains a newline or +# an unmatched quote. +# + +eval "set -- $( + printf '%s\n' "$DEFAULT_JVM_OPTS $JAVA_OPTS $GRADLE_OPTS" | + xargs -n1 | + sed ' s~[^-[:alnum:]+,./:=@_]~\\&~g; ' | + tr '\n' ' ' + )" '"$@"' + +exec "$JAVACMD" "$@" diff --git a/test2/gradlew.bat b/test2/gradlew.bat new file mode 100644 index 0000000..107acd3 --- /dev/null +++ b/test2/gradlew.bat @@ -0,0 +1,89 @@ +@rem +@rem Copyright 2015 the original author or authors. +@rem +@rem Licensed under the Apache License, Version 2.0 (the "License"); +@rem you may not use this file except in compliance with the License. +@rem You may obtain a copy of the License at +@rem +@rem https://www.apache.org/licenses/LICENSE-2.0 +@rem +@rem Unless required by applicable law or agreed to in writing, software +@rem distributed under the License is distributed on an "AS IS" BASIS, +@rem WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +@rem See the License for the specific language governing permissions and +@rem limitations under the License. +@rem + +@if "%DEBUG%" == "" @echo off +@rem ########################################################################## +@rem +@rem Gradle startup script for Windows +@rem +@rem ########################################################################## + +@rem Set local scope for the variables with windows NT shell +if "%OS%"=="Windows_NT" setlocal + +set DIRNAME=%~dp0 +if "%DIRNAME%" == "" set DIRNAME=. +set APP_BASE_NAME=%~n0 +set APP_HOME=%DIRNAME% + +@rem Resolve any "." and ".." in APP_HOME to make it shorter. +for %%i in ("%APP_HOME%") do set APP_HOME=%%~fi + +@rem Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script. +set DEFAULT_JVM_OPTS="-Xmx64m" "-Xms64m" + +@rem Find java.exe +if defined JAVA_HOME goto findJavaFromJavaHome + +set JAVA_EXE=java.exe +%JAVA_EXE% -version >NUL 2>&1 +if "%ERRORLEVEL%" == "0" goto execute + +echo. +echo ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH. +echo. +echo Please set the JAVA_HOME variable in your environment to match the +echo location of your Java installation. + +goto fail + +:findJavaFromJavaHome +set JAVA_HOME=%JAVA_HOME:"=% +set JAVA_EXE=%JAVA_HOME%/bin/java.exe + +if exist "%JAVA_EXE%" goto execute + +echo. +echo ERROR: JAVA_HOME is set to an invalid directory: %JAVA_HOME% +echo. +echo Please set the JAVA_HOME variable in your environment to match the +echo location of your Java installation. + +goto fail + +:execute +@rem Setup the command line + +set CLASSPATH=%APP_HOME%\gradle\wrapper\gradle-wrapper.jar + + +@rem Execute Gradle +"%JAVA_EXE%" %DEFAULT_JVM_OPTS% %JAVA_OPTS% %GRADLE_OPTS% "-Dorg.gradle.appname=%APP_BASE_NAME%" -classpath "%CLASSPATH%" org.gradle.wrapper.GradleWrapperMain %* + +:end +@rem End local scope for the variables with windows NT shell +if "%ERRORLEVEL%"=="0" goto mainEnd + +:fail +rem Set variable GRADLE_EXIT_CONSOLE if you need the _script_ return code instead of +rem the _cmd.exe /c_ return code! +if not "" == "%GRADLE_EXIT_CONSOLE%" exit 1 +exit /b 1 + +:mainEnd +if "%OS%"=="Windows_NT" endlocal + +:omega diff --git a/test2/settings.gradle b/test2/settings.gradle new file mode 100644 index 0000000..54ff240 --- /dev/null +++ b/test2/settings.gradle @@ -0,0 +1,2 @@ +rootProject.name = 'test2' + diff --git a/test2/src/main/java/org/example/BeforeOrderServiceJava.java b/test2/src/main/java/org/example/BeforeOrderServiceJava.java new file mode 100644 index 0000000..33795c9 --- /dev/null +++ b/test2/src/main/java/org/example/BeforeOrderServiceJava.java @@ -0,0 +1,59 @@ +package org.example; + +import lombok.extern.slf4j.Slf4j; + +import java.util.HashMap; +import java.util.Map; +import java.util.concurrent.ConcurrentHashMap; +import java.util.concurrent.locks.Lock; +import java.util.concurrent.locks.ReentrantLock; + +@Slf4j +public class BeforeOrderServiceJava { + + // 상품 DB + private final Map productDatabase = new ConcurrentHashMap<>(); + // 가장 최근 주문 정보를 저장하는 DB + private final Map latestOrderDatabase = new HashMap<>(); + + private final Lock lock = new ReentrantLock(); + + public BeforeOrderServiceJava() { + // 초기 상품 데이터 + productDatabase.put("apple", 100); + productDatabase.put("banana", 50); + productDatabase.put("orange", 75); + } + + // 주문 처리 메서드 + public void order(String customer, String productName, int amount) throws IllegalArgumentException { + lock.lock(); + Integer currentStock = productDatabase.getOrDefault(productName, 0); + + try { + Thread.sleep(1); // 동시성 이슈 유발을 위한 인위적 지연 + } catch (InterruptedException e) { + Thread.currentThread().interrupt(); + throw new RuntimeException(e); + } + + if (currentStock >= amount) { +// System.out.println("Current Thread : " + Thread.currentThread().getName() + +// " - CurrentStock : " + currentStock + " - Order : " + amount); + log.info("Thread {} 주문자 : {} 주문정보 : {} 1 건 ([{}])", Thread.currentThread().getName(), customer, productName, amount); + productDatabase.put(productName, currentStock - amount); + latestOrderDatabase.put(customer, new OrderInfo(productName, amount, System.currentTimeMillis())); + } + lock.unlock(); + } + + // 재고 조회 + public int getStock(String productName) { + return productDatabase.getOrDefault(productName, 0); + } + + public OrderInfo getLastOrder(String customer) { + return latestOrderDatabase.get(customer); + } +} + diff --git a/test2/src/main/java/org/example/Main.java b/test2/src/main/java/org/example/Main.java new file mode 100644 index 0000000..a318343 --- /dev/null +++ b/test2/src/main/java/org/example/Main.java @@ -0,0 +1,7 @@ +package org.example; + +public class Main { + public static void main(String[] args) { + BeforeOrderServiceJava Service = new BeforeOrderServiceJava(); + } +} \ No newline at end of file diff --git a/test2/src/main/java/org/example/OrderInfo.java b/test2/src/main/java/org/example/OrderInfo.java new file mode 100644 index 0000000..1689c33 --- /dev/null +++ b/test2/src/main/java/org/example/OrderInfo.java @@ -0,0 +1,17 @@ +package org.example; + +import lombok.Getter; + +@Getter +public class OrderInfo { + private String productName; + private Integer amount; + private long Time; + + public OrderInfo(String productName, int amount, long l) { + this.productName = productName; + this.amount = amount; + this.Time = l; + } + +} diff --git a/test2/src/test/java/BeforeOrderServiceJavaTest.java b/test2/src/test/java/BeforeOrderServiceJavaTest.java new file mode 100644 index 0000000..2cced0c --- /dev/null +++ b/test2/src/test/java/BeforeOrderServiceJavaTest.java @@ -0,0 +1,106 @@ +import org.example.BeforeOrderServiceJava; +import org.example.OrderInfo; +import org.junit.jupiter.api.Test; + +import java.util.HashMap; +import java.util.concurrent.CountDownLatch; +import java.util.concurrent.ExecutorService; +import java.util.concurrent.Executors; +import java.util.concurrent.locks.Lock; +import java.util.concurrent.locks.ReentrantLock; + +import static org.junit.jupiter.api.Assertions.*; + +class BeforeOrderServiceJavaTest { + + private final BeforeOrderServiceJava service = new BeforeOrderServiceJava(); + + + @Test + void testConcurrentOrdersCauseStockMismatch() throws InterruptedException { + String productName = "apple"; + int initialStock = service.getStock(productName); + //손님 5명 + String[] customers = {"April", "May","June", "July","December"}; + + int orderAmount = 8; + int threadCount = 100; + + ExecutorService executor = Executors.newFixedThreadPool(threadCount); + CountDownLatch latch = new CountDownLatch(threadCount); + + // 각 스레드에서 주문을 수행하는 작업 생성 + for (int i = 0; i < threadCount; i++) { + executor.execute(() -> { + + try { + service.order(customers[(int) (Math.random() * 5)],productName, orderAmount); + } finally { + latch.countDown(); // 작업 완료 후 카운트 감소 + + } + }); + } + + // 모든 스레드가 작업을 완료할 때까지 대기 + latch.await(); + executor.shutdown(); + + + + // 최종 재고 값 확인 + int expectedStock = initialStock % orderAmount; + int actualStock = service.getStock(productName); + + System.out.println("Expected Stock: " + expectedStock + ", Actual Stock: " + actualStock); + + // 동시성 이슈로 인해 재고가 맞지 않는 경우를 확인 + assertEquals(expectedStock, actualStock, "재고 불일치 발생!"); + } + + @Test + //각 손님의 마지막 주문 내역이 latestOrderDatabase에 제대로 들어갔는지 확인 + void testLatestOrder() throws InterruptedException { + String[] products = {"apple","banana", "orange"}; + String[] customers = {"April", "May","June", "July","December"}; + HashMap lastOrder = new HashMap<>(); + boolean result = true; + + int threadCount = 20; + + ExecutorService executor = Executors.newFixedThreadPool(threadCount); + CountDownLatch latch = new CountDownLatch(threadCount); + + // 각 스레드에서 주문을 수행하는 작업 생성 + for (int i = 0; i < threadCount; i++) { + executor.execute(() -> { + try { + String customer = customers[(int) (Math.random() * 5)]; + String product = products[(int) (Math.random() * 3)]; + int amount = (int) (Math.random() * 10)+1; + service.order(customer,product,amount); + lastOrder.put(customer, product+amount); + } finally { + latch.countDown(); // 작업 완료 후 카운트 감소 + } + }); + } + + // 모든 스레드가 작업을 완료할 때까지 대기 + latch.await(); + executor.shutdown(); + + + + for(String customer: customers) { + OrderInfo order = service.getLastOrder(customer); + System.out.println("주문자 : "+customer + "마지막 주문 내역 : " +order.getProductName()+" "+order.getAmount()+" 개"); + //실제 서비스속의 마지막 주문과 test를 위해 만든 lastOrder의 주문을 비교 + result = (order.getProductName() + order.getAmount()).equals(lastOrder.get(customer)) && result; + } + //모든 주문이 같다면 result는 true, 하나라도 틀리면 false + assertTrue(result); + } +} + +