如何使用Log4j中的AsyncAppender将日志消息写入Web服务?我应该创建扩展AsyncAppender的自定义Appender还是只需将自定义Appender附加到AsyncAppender?如果选择后者,则应在哪里获取AsyncAppender对象?是否有示例可供参考?
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE log4j:configuration SYSTEM "log4j.dtd" >
<log4j:configuration>
<appender name="console" class="org.apache.log4j.ConsoleAppender">
<layout class="org.apache.log4j.PatternLayout">
<param name="ConversionPattern" value="[%p] %d{dd MMM hh:mm:ss aa} %t [%l] %m%n"/>
</layout>
</appender>
<appender name="async" class="org.apache.log4j.AsyncAppender">
<param name="BufferSize" value="500"/>
<appender-ref ref="console"/>
</appender>
<root>
<priority value="all"></priority>
<appender-ref ref="async"/>
</root>
</log4j:configuration>
log4j.logger.com.noPath=DEBUG,fileAppender
log4j.appender.fileAppender=org.apache.log4j.RollingFileAppender
log4j.appender.fileAppender.File=c:/test.log
定义业务所需的日志记录器,'com.business',将上一步的文件附加器 'fileAppender' 链接到log4j AsyncAppender中,通过一个自定义类 com.log.AsyncAppenderHelper 来扩展log4j AsyncAppender。
log4j.logger.com.business=DEBUG,asyncLog
log4j.appender.asyncLog=com.log.AsyncAppenderHelper
log4j.appender.asyncLog.appenderFromLogger=com.noPath
在类路径中可用的java类com.log.AsyncAppenderHelper扩展了log4j.AsyncAppender。
package com.log
import java.util.Enumeration;
import org.apache.log4j.Appender;
import org.apache.log4j.AsyncAppender;
import org.apache.log4j.Logger;
/*
* This class helps configure to AsyncAppender from log4j as part of log4j.properties
* You can inject other appenders to AsyncAppender using the AsyncAppenderHelper
* This would free up the main program thread to be independent of log4j's logging operation
* @Author http://www.linkedin.com/in/jobypgeorge
*/
public class AsyncAppenderHelper extends AsyncAppender{
public AsyncAppenderHelper(){
super();
}
public void setAppenderFromLogger(String name){
Logger l = Logger.getLogger(name);
Enumeration<Appender> e = l.getAllAppenders();
while(e.hasMoreElements()){
Appender a = e.nextElement();
this.addAppender(a);
System.out.println("The newAppender "+a.getName() +" attach status "+this.isAttached(a));
}
}
}
回答自己的问题。
在log4j配置文件中(通常是log4j.xml或log4j.properties),我们应该定义AsyncAppender,它将引用一个真实的appender(它可以是我们自己定义的类,就像在我的情况下一样)。
因此,我编写了一个WebServiceAppender类,它扩展了AppenderSkeleton并实现了3个抽象方法。主要方法是“append”,它连接到Web服务并将所有信息发送到它。就这样。