Spring WebApp-在应用程序停止时关闭线程

小编典典

Spring WebApp-在应用程序停止时关闭线程

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并显示以下消息时，Tomcat无法彻底关闭：

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

这似乎是因为我尚未编写代码来停止ScheduledExecutorService。

我的问题是：在这种环境下应如何正确完成？

我注意到存在一个ContextStoppedEvent，因此，我为其实现了一个侦听器：

@Component
public class ExecutorsStop implements ApplicationListener<ContextStoppedEvent> {

@Autowired
ExecutorsStart executorsStart;

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

但是似乎在关闭Tomcat时未调用此事件处理程序。

我执行不正确吗，还是我完全想办法？

阅读 452

2020-06-16

共1个答案

小编典典

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，它要求contextDestroyed(..)在它的各种ServletContextListener和destroy()它的Servlet实例。在ContextLoaderListener和DispatcherServlet每个呼叫close()他们ApplicationContext。

2020-06-16