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refactor: 데이터베이스 락을 통해 중복 참여 방지 (#673)
* test: 동시 참여 시 중복 참여 가능한 상황 테스트 * refactor: 공모 상태 업데이트 로직 이동 * refactor: 사용하지 않는 쿼리 제거 * feat: Offering 테이블 비관적 쓰기 락을 통해 중복 참여 방지 * test: 같은 공모 다른 사용자의 동시 참여 경우 테스트 * refactor: 비관적 쓰기 락 -> 낙관적 락을 통해 중복 참여 방지 * refactor: version 필드 추가로 인한 soft delete 쿼리 수정 * refactor: offeringMember 저장 시 offering의 실 저장 데이터 활용하도록 * refactor: 낙관적 락 -> 비관적 쓰기 락 * test: 동시 실행 코드 ConcurrencyExecutor 클래스로 추출
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116 changes: 116 additions & 0 deletions
116
backend/src/test/java/com/zzang/chongdae/global/helper/ConcurrencyExecutor.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,116 @@ | ||
| package com.zzang.chongdae.global.helper; | ||
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| import java.util.ArrayList; | ||
| import java.util.List; | ||
| import java.util.concurrent.CountDownLatch; | ||
| import java.util.concurrent.ExecutionException; | ||
| import java.util.concurrent.ExecutorService; | ||
| import java.util.concurrent.Executors; | ||
| import java.util.concurrent.Future; | ||
| import java.util.function.Supplier; | ||
|
|
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| public class ConcurrencyExecutor { | ||
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| private static ConcurrencyExecutor INSTANCE; | ||
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|
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| public static ConcurrencyExecutor getInstance() { | ||
| if (INSTANCE == null) { | ||
| INSTANCE = new ConcurrencyExecutor(); | ||
| } | ||
| return INSTANCE; | ||
| } | ||
|
|
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| public void executeWithoutResult(Runnable... tasks) throws InterruptedException { | ||
| int executeCount = tasks.length; | ||
| ExecutorService executorService = Executors.newFixedThreadPool(executeCount); | ||
| CountDownLatch countDownLatch = new CountDownLatch(executeCount); | ||
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| for (Runnable task : tasks) { | ||
| executorService.submit(() -> { | ||
| try { | ||
| task.run(); | ||
| } finally { | ||
| countDownLatch.countDown(); | ||
| } | ||
| }); | ||
| } | ||
|
|
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| countDownLatch.await(); | ||
| executorService.shutdown(); | ||
| } | ||
|
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| public void executeWithoutResult(int repeatCount, Runnable task) throws InterruptedException { | ||
| ExecutorService executorService = Executors.newFixedThreadPool(repeatCount); | ||
| CountDownLatch countDownLatch = new CountDownLatch(repeatCount); | ||
|
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| for (int i = 0; i < repeatCount; i++) { | ||
| executorService.submit(() -> { | ||
| try { | ||
| task.run(); | ||
| } finally { | ||
| countDownLatch.countDown(); | ||
| } | ||
| }); | ||
| } | ||
|
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| countDownLatch.await(); | ||
| executorService.shutdown(); | ||
| } | ||
|
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| public final <T> List<T> execute(Supplier<T>... tasks) throws InterruptedException { | ||
| int executeCount = tasks.length; | ||
| ExecutorService executorService = Executors.newFixedThreadPool(executeCount); | ||
| CountDownLatch countDownLatch = new CountDownLatch(executeCount); | ||
|
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| List<Future<T>> result = new ArrayList<>(); | ||
| for (Supplier<T> task : tasks) { | ||
| Future<T> future = executorService.submit(() -> { | ||
| try { | ||
| return task.get(); | ||
| } finally { | ||
| countDownLatch.countDown(); | ||
| } | ||
| }); | ||
| result.add(future); | ||
| } | ||
|
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| countDownLatch.await(); | ||
| executorService.shutdown(); | ||
|
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| return result.stream() | ||
| .map(this::getWithoutException) | ||
| .toList(); | ||
| } | ||
|
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| public <T> List<T> execute(int repeatCount, Supplier<T> task) throws InterruptedException { | ||
| ExecutorService executorService = Executors.newFixedThreadPool(repeatCount); | ||
| CountDownLatch countDownLatch = new CountDownLatch(repeatCount); | ||
|
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| List<Future<T>> result = new ArrayList<>(); | ||
| for (int i = 0; i < repeatCount; i++) { | ||
| Future<T> future = executorService.submit(() -> { | ||
| try { | ||
| return task.get(); | ||
| } finally { | ||
| countDownLatch.countDown(); | ||
| } | ||
| }); | ||
| result.add(future); | ||
| } | ||
|
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| countDownLatch.await(); | ||
| executorService.shutdown(); | ||
|
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| return result.stream() | ||
| .map(this::getWithoutException) | ||
| .toList(); | ||
| } | ||
|
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| private <T> T getWithoutException(Future<T> future) { | ||
| try { | ||
| return future.get(); | ||
| } catch (InterruptedException | ExecutionException e) { | ||
| throw new RuntimeException("동시 작업 내부 예외 발생: ", e); | ||
| } | ||
| } | ||
| } |
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