多个log4j实例配置 [英] multiple log4j instance configuration
问题描述
我想使用log4j Logger的多个实例。我需要将不同的Properties对象附加到每个log4j Logger实例。
I want to use multiple instances of the log4j Logger. I need to attach different Properties objects to each of these log4j Logger instances.
以下是为一个实例配置的代码：
Here is the code to configure for one instance:
LOG4J = org.apache.log4j.Logger.getLogger(Logger.class);
Properties log4jProps = new Properties();
...
PropertyConfigurator.configure(log4jProps);
如果我想要两个log4j实例并且每个实例都有不同的属性怎么办？
What if I want to have two log4j instance and each of them has different properties?
推荐答案
你能解释为什么你想要更详细的多个记录器吗？我认为不可能有多个log4j实例。
Can you explain why you want multiple loggers in more detail? I don't think it's possible to have multiple log4j instances.
如果你只想要多个appender，请看这里：
If you just want multiple appenders, look here:
- http://www.velocityreviews.com/forums/t721794-log4j-different-logger-instances.html
以下是上述链接中的log4j.properties：
Here's the log4j.properties from the above link:
# logj4.properties
log4j.rootCategory = WARN, A
log4j.category.com.lewscanon = WARN, F
log4j.category.com.lewscanon.mouser = DEBUG, X
log4j.appender.A = org.apache.log4j.ConsoleAppender
log4j.appender.A.layout = org.apache.log4j.PatternLayout
log4j.appender.F = org.apache.log4j.RollingFileAppender
log4j.appender.F.layout = org.apache.log4j.PatternLayout
log4j.appender.F.File = /projects/mouser/logs/lewscanon.log
log4j.appender.F.MaxFileSize = 512KB
log4j.appender.F.MaxBackupIndex = 2
log4j.appender.X = org.apache.log4j.RollingFileAppender
log4j.appender.X.layout = org.apache.log4j.PatternLayout
log4j.appender.X.File = /projects/mouser/logs/mouser.log
log4j.appender.X.MaxFileSize = 512KB
log4j.appender.X.MaxBackupIndex = 2
log4j.appender.A.layout.ConversionPattern= %d %-16c{1}:%-39m %-t %x%n
log4j.appender.F.layout.ConversionPattern= %d %-16c{1}:%-39m %-t %x%n
log4j.appender.X.layout.ConversionPattern= %d %-16c{1}:%-39m %-t %x%n
这些行：
log4j.rootCategory = WARN, A
log4j.category.com.lewscanon = WARN, F
log4j.category.com.lewscanon.mouser = DEBUG, X
说如下：
- 将所有内容记录到appender A（这是控制台）。仅记录警告及以上
- 将所有内容从com.lewscanon包记录到appender F（转到文件lewscanon.log）。仅记录警告及以上
- 将所有内容从com.lewscannon.mouser包记录到appender X（转到文件mouser.log）。只记录调试及以上
还可以提供完整的班级名称：
It's also possible to supply full class names:
log4j.category.com.lewscanon.SomeClass = WARN, F
表示从 com.lewscanon.SomeClass 类到appender F，级别警告及以上的所有内容。
means log everything from com.lewscanon.SomeClass class to appender F, level warn and above.
我认为上面的内容足够精细，但是如果你绝对需要它更精细（我认为这不够实用），每个：
I suppose the above is granular enough, but if you absolutely need it more granular (I don't think that's practical enough, though), per:
- http://logging.apache.org/log4j/1.2/apidocs/org/apache/log4j/Logger.html
记录器。 getLogger（String name）接受名称。所以你可以这样做：
Logger.getLogger(String name) accepts names. So you can do something like:
log4j.category.myFancyLogger = INFO, F
并使用 Logger.getLogger（myFancyLogger）来获取记录到appender的记录器F带有关卡信息。
and use Logger.getLogger("myFancyLogger") to get the logger that logs to appender F with level info.
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