您如何有效地每隔X分钟重复一次操作? [英] How do you efficiently repeat an action every x minutes?

问题描述

我有一个在JBoss中运行的应用程序.我有一个传入的Web服务请求，该请求将更新ArrayList.我想每60秒从另一个班级轮询一次此列表.最有效的方法是什么?

I have an application that runs in JBoss. I have an incoming web service request that will update an ArrayList. I want to poll this list from another class every 60 seconds. What would be the most efficient way of doing this?

有人能给我指出一个好榜样吗?

Could anyone point me to a good example?

推荐答案

我还建议

I would also recommend ScheduledExecutorService, which offers increased flexibility over Timer and TimerTask including the ability to configure the service with multiple threads. This means that if a specific task takes a long time to run it will not prevent other tasks from commencing.

// Create a service with 3 threads.
ScheduledExecutorService execService = Executors.newScheduledThreadPool(3);

// Schedule a task to run every 5 seconds with no initial delay.
execService.scheduleAtFixedRate(new Runnable() {
  public void run() {
    System.err.println("Hello, World");
  }
}, 0L, 5L, TimeUnit.SECONDS);

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