异步编排多任务异步执行

参考: https://blog.csdn.net/teachy/article/details/104971814

创建线程池:

/**
     * 自定义线程池
     * int corePoolSize, 核心线程数 = CPU核数
     * int maximumPoolSize,最大线程数 = CPU核数 * 2
     * long keepAliveTime, 等待时间,线程池线程 > 核心线程数,没有新任务等待keepAliveTime之后销毁
     * TimeUnit unit,
     * BlockingQueue<Runnable> workQueue, 任务队列使用ArrayBlockingQueue,固定40长度
     * RejectedExecutionHandler handler,饱和策略: CallerRunsPolicy: 不抛弃任务,也不抛异常,调用执行自己的线程运行任务
     */
    public static ExecutorService executor = new ThreadPoolExecutor(Runtime.getRuntime().availableProcessors(),
            Runtime.getRuntime().availableProcessors() * 2,
            10L, TimeUnit.SECONDS,
            new ArrayBlockingQueue<>(40),new ThreadPoolExecutor.CallerRunsPolicy());

具体多任务:

public Map<String, Object> routeVehicles(LogisticsTransportBillInfoInDTO billInfoInDTO) {
        long startTime = System.currentTimeMillis();
        Map<String, Object> result = new HashMap<>();
        MapTrack mapTrack = new MapTrack();
        List list = new ArrayList();
        CompletableFuture<String>[] completableFutures = new CompletableFuture[billInfoInDTO.getVersion()];
        for (int i = 0; i < billInfoInDTO.getVersion(); i++) {
            final String vno = "陕YH0008" ;
            // 异步执行任务
            CompletableFuture<String> future = CompletableFuture.supplyAsync(() -> {
                // 车牌号码
                mapTrack.setVno(vno);
                mapTrack.setVco(2);
                mapTrack.setStartAreaCode("431102");
                mapTrack.setEndAreaCode("450324");
                //多个任务
                return sinoiovRemote.transTimeManage(mapTrack);
            },executor);
            completableFutures[i] = future;
        }
        try {
            CompletableFuture<Void> allOf = CompletableFuture.allOf(completableFutures);
            //等待所有结果完成
            allOf.get();
            for (int i = 0; i < completableFutures.length; i++) {
                if (completableFutures[i] != null){
                    // 拿到结果
                    String res = completableFutures[i].get();
                    if (ObjectUtil.isNotEmpty(res)){
                        list.add(JSONUtil.toJsonStr(res));
                    }else {
                        list.add(mapTrack);
                    }
                }
            }
        }catch (Exception e){
            e.printStackTrace();
        }finally {
            //executor.shutdown();
        }
        result.put("sinoiovList",list);
        long timeout = System.currentTimeMillis() - startTime;
        System.out.println(timeout);
        logger.info("程序耗时: " + timeout);
        return result;
    }

　代码解释:

CompletableFuture.supplyAsync()
Async 异步执行方法

CompletableFuture<Void> allOf = CompletableFuture.allOf(completableFutures);
//同时执行多个任务

CompletableFuture.allOf()

//等待所有结果完成
allOf.get();