logback系列之七：继承RollingFileAppender，保存自定义文件名的日志

继承类：

package com.hk3t.air.system.log;

import ch.qos.logback.classic.spi.ILoggingEvent;
import ch.qos.logback.core.rolling.RollingFileAppender;

import com.hk3t.air.utils.MyConstants;

/**
 * @author Sunny 
 *
 * 2016-8-23
 */
public class UserFileAppender extends RollingFileAppender {
	
	private String currentlyActiveFile;
	
	@Override
	protected void subAppend(ILoggingEvent event){
		
		if(currentlyActiveFile == null){
			currentlyActiveFile = getFile();
		}
		
		String activeFile = currentlyActiveFile;
		if(event.getMdc() != null){
			if(event.getMdc().get(MyConstants.LOG_USER_KEY) != null && event.getMdc().get(MyConstants.LOG_FILEPATH_KEY) != null){
				activeFile = event.getMdc().get(MyConstants.LOG_FILEPATH_KEY);
			}else{
				if(event.getMdc().get(MyConstants.LOG_USER_KEY) != null){
					activeFile = activeFile.replace("{LOG_USER}", event.getMdc().get(MyConstants.LOG_USER_KEY));
				}
				if(event.getMdc().get(MyConstants.LOG_IP_KEY) != null){
					activeFile = activeFile.replace("{LOG_IP}", event.getMdc().get(MyConstants.LOG_IP_KEY));
				}
			}
		}
		
		setFile(activeFile);
		start();
		super.subAppend(event);
	}
}

XML配置

	
	
	    
			INFO
	    
	    
            
		
            ${log.base}/user/user_{LOG_USER}_{LOG_IP}.log 
        
          
        
            %date [%contextName] [%marker] [%thread] [%X{LOG_IP}] [%X{LOG_USER}] %-5level %logger{80} - %msg%n  
        
        true  
    	false