从servlet上下文记录销毁事件 [英] Logging from servlet context destroyed event

问题描述

在我基于Servlet的应用程序中，我想记录启动和关闭的事件。

Within my Servlet-based application, I would like to log events for startup and shutdown.

我试图实现 ServletContextListener 这样做的接口：

I've tried to implement the ServletContextListener interface to do this:

public class DiagnosticListener
    implements ServletContextListener {

    private static final Logger LOG = LogManager.getLogger(DiagnosticListener.class);

    @Override
    public void contextInitialized( final ServletContextEvent sce ) {
        LOG.info("Context initialized.");
    }

    @Override
    public void contextDestroyed( final ServletContextEvent sce ) {
        LOG.info("Context destroyed.");
    }
}

初始化事件按预期记录，但已销毁事件永远不会出现我假设这与log4j2如何使用类似的侦听器管理其生命周期有关，在此事件期间，日志记录基础结构不再可用。

The initialized event is logged as expected, but the destroyed event never appears. I am assuming this is to do with how log4j2 manages its lifecycle using a similar listener, that logging infrastructure is no longer available during this event.

有没有办法记录应用程序被关闭的事件？

Is there a way to log an event for the application being shut down?

推荐答案

我们与Logback的类似问题发生冲突。
您必须编写自己的web.xml来解决这个问题，因为没有其他选择来定义侦听器顺序。

We clashed against a similar issue with Logback. You have to write your own web.xml to fix that, because there's no alternatives to define listeners order.

我们使用以下命令禁用了LogbackServletContextListener：

We disabled the LogbackServletContextListener with:

<context-param>
    <param-name>logbackDisableServletContainerInitializer</param-name>
    <param-value>true</param-value>
</context-param>

然后手动添加LogbackServletContextListener作为第一个监听器：

then add the LogbackServletContextListener by hand as the first listener:

<listener>
    <listener-class>ch.qos.logback.classic.servlet.LogbackServletContextListener</listener-class>
</listener>

然后是所有其他听众。

不知道log4j，但我认为有类似的东西...

No idea about log4j, but I think there's something similar...

编辑：是的，有：

<context-param>
    <param-name>isLog4jAutoInitializationDisabled</param-name>
    <param-value>true</param-value>
</context-param>

来源： https://logging.apache.org/log4j/2.x/manual/webapp.html

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