java 按需重新加载 log4j2 配置
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Reload log4j2 configuration on demand
提问by jamp
I have my log4j2.xml config file set to be checked every 30 seconds:
我将 log4j2.xml 配置文件设置为每 30 秒检查一次：
<Configuration status="WARN" monitorInterval="30">
...
</Configuration>
Is it possible to programmatically tell log4j2 to check for changes in the configuration instead of having a timeout?
是否可以以编程方式告诉 log4j2 检查配置中的更改而不是超时？
N.B.I don't want to programmatically load the configuration specifying the config file, I just want to tell log4j2 to check the config file that has been loaded before as if the monitorInterval expired.
NB我不想以编程方式加载指定配置文件的配置，我只想告诉log4j2检查之前加载的配置文件，就好像monitorInterval过期一样。
Thanks!
谢谢！
回答by jamp
It looks like I've found the solution:
看起来我已经找到了解决方案：
((org.apache.logging.log4j.core.LoggerContext) LogManager.getContext(false)).reconfigure();
Does anyone see anything wrong/side-effects with this?
有没有人看到任何错误/副作用？
回答by Remko Popma
There is currently no clean way to do this. It can be done with reflection. (Of course this may break if the implementation changes.)
目前没有干净的方法来做到这一点。它可以通过反射来完成。（当然，如果实现发生变化，这可能会中断。）
UPDATE: this is wrong. There isa clean way, see jamp's answer below.
更新：这是错误的。这里是一个干净的方式，请参见下面JAMP的答案。
org.apache.logging.log4j.core.LoggerContext ctx = (org.apache.logging.log4j.core.LoggerContext) LogManager.getContext(false);
org.apache.logging.log4j.core.config.FileConfigurationMonitor mon = (org.apache.logging.log4j.core.config.FileConfigurationMonitor) ctx.getConfiguration().getConfigurationMonitor();
// use reflection to get monitor's "nextCheck" field.
// set field accessible
// set field value to zero
mon.checkConfiguration();
