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批量发送请求后立即返回线程的处理结果(不阻塞)

news 2026/5/12 11:32:58

基于Spring Boot的CompletableFuture与Consumer批量处理方案

方案概述：

异步结果获取：通过CompletableFuture获取线程处理结果
结果回调：使用Consumer模式处理完成后的结果

核心实现分析：

1. 线程池配置

package org.completablefuture.consumer;import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.scheduling.concurrent.ThreadPoolTaskExecutor;import java.util.concurrent.Executor;@Configuration
public class AsyncConfig {@Bean("taskExecutor")public Executor taskExecutor() {ThreadPoolTaskExecutor executor = new ThreadPoolTaskExecutor();executor.setCorePoolSize(10);executor.setMaxPoolSize(20);executor.setQueueCapacity(100);executor.setThreadNamePrefix("BatchProcessing-");executor.setRejectedExecutionHandler(new java.util.concurrent.ThreadPoolExecutor.CallerRunsPolicy());executor.initialize();return executor;}
}

配置专用线程池处理批量任务
核心线程5个，最大线程10个，队列容量20

2.批量处理服务

List<CompletableFuture<ProcessResult>> futures = requests.stream().map(request -> {CompletableFuture<ProcessResult> future = new CompletableFuture<>();batchProcessingService.process(request, result -> {}, future);log.info("batch处理返回的future: {}", future);return future;}).collect(Collectors.toList());

/*** 单个处理请求，请求处理完成后立即回调** @param request* @param callback* @param completableFuture*/public void process(BatchRequest request,Consumer<ProcessResult> callback,CompletableFuture<ProcessResult> completableFuture) {log.info("进入process request: {}", request);CompletableFuture.supplyAsync(() -> businessService.dealBusiness(request), taskExecutor).whenComplete((result, throwable) -> {if (throwable != null) {ProcessResult errorResult = new ProcessResult(request.getId(),false,"处理失败: " + throwable.getMessage(),null,0,null);callback.accept(errorResult);completableFuture.completeExceptionally(throwable);} else {callback.accept(result);completableFuture.complete(result);}});}

控制层循环处理请求
BatchProcessingService类中处理每一个请求，并从线程中获取处理结果，并回调返回

3.业务处理

public ProcessResult dealBusiness(BatchRequest request) {// 模拟处理逻辑String id = request.getId();Integer idInt = Integer.valueOf(id) == null ? 0 : Integer.valueOf(id);if (StringUtils.isNoneBlank(id) && idInt == 3){try {// 模拟随机异常if (new Random().nextBoolean()) {throw new RuntimeException("Simulated business exception");}} catch (IllegalArgumentException exception) {// 处理特定异常return new ProcessResult(request.getId(),false,"处理失败",null,-1,exception);}/*new ProcessResult(request.getId(),false,"处理失败",null,-1,new Exception("处理出现异常"));*/}if (StringUtils.isNoneBlank(id) && idInt % 2 == 0){return new ProcessResult(request.getId(),false,"处理失败",null,-1,null);} else {return new ProcessResult(request.getId(),true,"处理成功",request.getData(),-1,null);}}

4.对处理结果进行合并

return CompletableFuture.allOf(futures.toArray(new CompletableFuture[0])).thenApply(v -> futures.stream().map(CompletableFuture::join).collect(Collectors.toList()));

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