log4j를 사용하여 서로 다른 콘텐츠의 여러 로그 파일 만들기

log4j를 사용하여 서로 다른 콘텐츠의 여러 로그 파일 만들기

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다른 어 펜더에 다른 수준의 로깅을 출력하도록 log4j를 구성하는 방법이 있습니까?

여러 로그 파일을 설정하려고합니다. 기본 로그 파일은 모든 클래스에 대한 모든 INFO 및 위 메시지를 포착합니다. (개발 중에는 모든 DEBUG 이상 메시지와 특정 클래스에 대한 TRACE를 포착합니다.)

그런 다음 별도의 로그 파일을 갖고 싶습니다. 해당 로그 파일은 특정 클래스 하위 집합에 대한 모든 DEBUG 메시지를 포착하고 다른 클래스에 대한 모든 메시지를 무시합니다.

내가 원하는 것을 얻을 수있는 방법이 있습니까?

고마워, 댄

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시작해야합니다.

log4j.rootLogger=QuietAppender, LoudAppender, TRACE
# setup A1
log4j.appender.QuietAppender=org.apache.log4j.RollingFileAppender
log4j.appender.QuietAppender.Threshold=INFO
log4j.appender.QuietAppender.File=quiet.log
...


# setup A2
log4j.appender.LoudAppender=org.apache.log4j.RollingFileAppender
log4j.appender.LoudAppender.Threshold=DEBUG
log4j.appender.LoudAppender.File=loud.log
...

log4j.logger.com.yourpackage.yourclazz=TRACE

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아마도 이런 건가요?

<!DOCTYPE log4j:configuration SYSTEM "log4j.dtd">
<log4j:configuration xmlns:log4j="http://jakarta.apache.org/log4j/">
 <!-- general application log -->
 <appender name="MainLogFile" class="org.apache.log4j.FileAppender">
  <param name="File" value="server.log" />
  <param name="Threshold" value="INFO" />
  <layout class="org.apache.log4j.PatternLayout">
   <param name="ConversionPattern" value="%-5p %t [%-40.40c] %x - %m%n"/>
  </layout>
 </appender> 
 <!-- additional fooSystem logging -->
 <appender name="FooLogFile" class="org.apache.log4j.FileAppender">
  <param name="File" value="foo.log" />
  <layout class="org.apache.log4j.PatternLayout">
   <param name="ConversionPattern" value="%-5p %t [%-40.40c] %x - %m%n"/>
  </layout>
 </appender>
 <!-- foo logging -->
 <logger name="com.example.foo">
  <level value="DEBUG"/>
  <appender-ref ref="FooLogFile"/>
 </logger>
 <!-- default logging -->
 <root>
  <level value="INFO"/>
  <appender-ref ref="MainLogFile"/>
 </root>
</log4j:configuration>

따라서 모든 정보 메시지는 server.log에 기록됩니다. 반대로 foo.log에는 디버그 수준 메시지를 포함하여 com.example.foo 메시지 만 포함됩니다.

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I had this question, but with a twist - I was trying to log different content to different files. I had information for a LowLevel debug log, and a HighLevel user log. I wanted the LowLevel to go to only one file, and the HighLevel to go to both a file, and a syslogd.

My solution was to configure the 3 appenders, and then setup the logging like this:

log4j.threshold=ALL
log4j.rootLogger=,LowLogger

log4j.logger.HighLevel=ALL,Syslog,HighLogger
log4j.additivity.HighLevel=false

The part that was difficult for me to figure out was that the 'log4j.logger' could have multiple appenders listed. I was trying to do it one line at a time.

Hope this helps someone at some point!

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For the main logfile/appender, set up a .Threshold = INFO to limit what is actually logged in the appender to INFO and above, regardless of whether or not the loggers have DEBUG, TRACE, etc, enabled.

As for catching DEBUG and nothing above that... you'd probably have to write a custom appender.

However I'd recommend not doing this, as it sounds like it would make troubleshooting and analysis pretty hard:

1. If your goal is to have a single file where you can look to troubleshoot something, then spanning your log data across different files will be annoying - unless you have a very regimented logging policy, you'll likely need content from both DEBUG and INFO to be able to trace execution of the problematic code effectively.
2. By still logging all of your debug messages, you are losing any performance gains you usually get in a production system by turning the logging (way) down.

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Demo link: https://github.com/RazvanSebastian/spring_multiple_log_files_demo.git

My solution is based on XML configuration using spring-boot-starter-log4j. The example is a basic example using spring-boot-starter and the two Loggers writes into different log files.

참고URL : https://stackoverflow.com/questions/728295/creating-multiple-log-files-of-different-content-with-log4j