调用LogManager.shutdown()后如何重新启动log4j2?

问题描述

我有一种方法可以像这样重新配置log4j2:

I have a method to reconfig log4j2 like this:

LogManager.shutdown(); // SHUTDOWN log4j2
    InputStream in = getClass().getResourceAsStream("/my2ndLog4j2.xml");
    ConfigurationSource source = new ConfigurationSource(in);
    Configurator.initialize(null, source);
    LoggerContext context = (LoggerContext) LogManager.getContext(false);
    context.reconfigure();
    context.start(); // NOT WORK, no log appear anymore...

因此，我可以在运行时在生产日志配置和开发配置之间重新配置log4j2，但是当我调用LogManager.shutdown()时，它将永远关机，永不返回，context.start()不起作用，实际上我这样做长时间在log4j1.x中使用，在log4j1.x中使用:

So I can reconfig log4j2 between production log config and development config at runtime, but when I call LogManager.shutdown(), it really SHUTDOWN forever, never get back, context.start() is not work, infact I do this in log4j1.x for long time, in log4j1.x, use:

org.apache.log4j.PropertyConfigurator.configure(cfgPath);

然后又回来了，但是log4j2怎么回事?

then it get back, but how log4j2?

推荐答案

如果要在运行时更改log4j2配置文件，则下面的代码足以完成此操作-

If you want to change log4j2 configuration file at runtime, then below code is sufficient to do so -

Configurator.initialize(null, "my2ndLog4j2.properties");

无需关闭LogManager，然后再重新启动.

There is no need to shutdown LogManager and then starting it again.

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