在Java中并发执行计划任务 [英] Concurrent execution of scheduled tasks in Java

问题描述

我有一个 TimerTask ，用于在特定时间间隔收集指标。但是，任务执行的时间段可能少于任务执行的时间（有时如果某些事件超时并被延迟）。

I have a TimerTask that is designed to gather metrics at a specific interval. However it is possible that the period of the task execution is less than the time of task execution (occasionally if something times out and gets delayed).

有办法

我知道Timer使用单个线程，并且 ScheduledThreadPoolExecutor

I know that Timer uses a single thread, and the ScheduledThreadPoolExecutor will delay execution regardless of the rate.

推荐答案

我建议你使用 Executors.newCachedThreadPool（）或 newCachedThreadPool（ThreadFactory threadFactory）工厂，结合计时器。所以代码应该像这样

I would recommend you using Executors.newCachedThreadPool() or newCachedThreadPool(ThreadFactory threadFactory) with your own thread factory, in conjuction with Timer. So the code should look like this

Executor executor = Executors.newCachedThreadPool();
Timer time = new Timer();
timer.scheduleAtFixedRate(new TimerTask() {

    public void run() {
        executor.execute(new Runnable() {

             public void run() {
                  //your business logic
             }
        });
    }
}, delay, period);

这样，您可以安排某些时间段的任务，并且它们都会同时运行。

This way you would schedule tasks with some period and they would all run concurrently.

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