由于Log4j中的默认行为，避免对同一消息进行多次日志记录

Question

我在Grails应用程序中工作，希望在不同的文件中记录消息。我想在不同的文件中记录异常，正常和API日志。但是根据Log4j的一般角色，如果我们将记录器级别设置为'info'，那么警告和错误消息也将开始登录到这个文件中，而我想在不同的文件中记录错误消息。因此，我的错误信息将被记录在错误文件和信息文件中。虽然我希望“信息”记录器只记录“信息”级别的消息，而不是“错误”级别的消息。而“错误”记录器只记录错误消息。

log4j = {
def layoutPattern = new PatternLayout("[%d{ISO8601}] %m \r\n")
def dailyRollingInfoFile = new DailyRollingFileAppender(
        name:"rollingInfoFileAppender",
        layout: layoutPattern,
        //Path of the Log File
        fileName:"C:\\MS-Logs\\Application\\MSLogs.log",
        datePattern: "'.'dd-MM-yyyy")

def dailyRollingExceptionFile = new DailyRollingFileAppender(
        name:"rollingExceptionFileAppender",
        layout: layoutPattern,
        //Path of the Log File
        fileName:"C:\\MS-Logs\\Exceptions\\ExceptionLogs.log",
        datePattern: "'.'dd-MM-yyyy")

def dailyRollingExceptionAPIFile = new DailyRollingFileAppender(
        name:"rollingAPIFileAppender",
        layout: layoutPattern,
        //Path of the Log File
        fileName:"C:\\MS-Logs\\API\\MS-NotificationsLogs.log",
        datePattern: "'.'dd-MM-yyyy")

 //For logging exceptions stack trace
appenders {
    appender dailyRollingInfoFile
    appender dailyRollingExceptionFile
    appender dailyRollingExceptionAPIFile
   }

root {
    info  'rollingInfoFileAppender', additivity: false
    debug 'rollingAPIFileAppender', additivity: false
    error 'rollingExceptionFileAppender'
}
}

dailyRollingExceptionFile.addFilter(new org.apache.log4j.varia.LevelMatchFilter(levelToMatch:'ERROR', acceptOnMatch: true))
dailyRollingExceptionFile.addFilter(new org.apache.log4j.varia.DenyAllFilter())

//To make it sure that It will just Log, Messages by Info Logger
dailyRollingInfoFile.addFilter(new org.apache.log4j.varia.LevelMatchFilter(levelToMatch:'INFO', acceptOnMatch: true))
dailyRollingInfoFile.addFilter(new org.apache.log4j.varia.DenyAllFilter())

//To make it sure that It will just Log, Messages by API Logger
dailyRollingAPIFile.addFilter(new org.apache.log4j.varia.LevelMatchFilter(levelToMatch:'DEBUG', acceptOnMatch: true))
dailyRollingAPIFile.addFilter(new org.apache.log4j.varia.DenyAllFilter())

如何避免在不同的文件中重复记录相同的消息？我们如何在不同的文件中记录消息而不在其他文件中重复它？

感谢您抽出时间：）

Answer 1

我相信log4j的levelmatchfilter允许您做您想做的事情：

def dailyRollingInfoFile = new DailyRollingFileAppender(...)
dailyRollingInfoFile.addFilter(new org.apache.log4j.varia.LevelMatchFilter(levelToMatch:'INFO', acceptOnMatch: true))
dailyRollingInfoFile.addFilter(new org.apache.log4j.varia.DenyAllFilter())

denyallfilter删除levelmatchfilter不匹配的消息（即除级别信息以外的所有内容）