Spring webapp - 在应用程序停止时关闭线程

时间:2014-03-26 02:47:21

标签: java spring tomcat

我使用Spring的ApplicationListener接口实例化ScheduledExecutorService,如下所示:

@Component
public class ExecutorsStart implements ApplicationListener<ContextRefreshedEvent> {

    private ScheduledExecutorService executor;

@Autowired
Scheduler scheduler;

@Override
public void onApplicationEvent(final ContextRefreshedEvent event) {
    executor = Executors.newSingleThreadScheduledExecutor();
    scheduler.init();
    int delay = 10;
    int period = 60;// repeat every 1 minutes.
    executor.scheduleAtFixedRate(scheduler, delay, period, TimeUnit.SECONDS);
}

目前,当我运行./shutdown.sh时,Tomcat不会干净地关闭,并带有消息:

The web application [/foo] appears to have started a thread named [pool-1-thread-1] but has failed to stop it

这似乎是因为我还没有编写代码来停止ScheduledExecutorService。

我的问题是:在这种环境下如何正确地完成这项工作?

我注意到存在ContextStoppedEvent,因此,我实现了一个监听器:

@Component
public class ExecutorsStop implements ApplicationListener<ContextStoppedEvent> {

@Autowired
ExecutorsStart executorsStart;

@Override
public void onApplicationEvent(final ContextStoppedEvent event) {
    executorsStart.executor.shutdownNow();
}

但是当Tomcat关闭时,似乎没有调用此事件处理程序。

我是否错误地实施了这项措施,还是我完全采用了这种方式?

1 个答案:

答案 0 :(得分:6)

您正在寻找ContextClosedEvent

@Component
public class ExecutorsStop implements ApplicationListener<ContextClosedEvent> {

    @Autowired
    ExecutorsStart executorsStart;

    @Override
    public void onApplicationEvent(final ContextClosedEvent event) {
        System.out.println("Stopped: " + event);
    }
}

当Servlet容器关闭时,它会在其contextDestroyed(..)个实例上的ServletContextListenerdestroy()上调用ServletContextLoaderListener上的DispatcherServletApplicationContext每次致电close()