Question

我怎么能够创造出一份每秒6秒的工作,而这项工作在提出申请时就自动开始?

目前,我有这一类人使用时间,但这一进程在开始部署时不会自动启动。

所有这一切,只有EJBs, 在JBos4.3和没有WAR的欧洲复兴开发银行,只有EJBs

@Stateless
public class MyJobBean implements MyJob {
private static final long EJECUTION_INTERVAL=6000;
@Resource
private TimerService ts;
@PostConstruct // This not work in deploy, only when somebody calls the EJB
public void init() { 
    System.out.println("Post Constructor Method init() Invoked"); 
    ts.createTimer(EJECUTION_INTERVAL, null);
}
@Timeout // Fired by the timer 
public void myJOBProcess(Timer timer) {
    System.out.println("the job was invoked");

    ts.createTimer(EJECUTION_INTERVAL, null); //create another future ejecution
}
@PreDestroy
public void tidyUp() {
    System.out.println("Canceling scheduled Timers");
    for (Object obj : ts.getTimers()) {
        Timer timer = (Timer)obj;
        timer.cancel();
        System.out.println("Timer Canceled");
    }   
}
}

预支

Answer 1

在JBoss,你可以使用以@service为定义的甲基溴。如果有<代码>的开端()方法,在申请启动时将采用这一方法。

Answer 2

Servlet listeners or load-on-startup servlets were the only javaee-portable way to autorun some code on deploy until EJB 3.1 with @Schedule annotation.

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