consoleappender.java

JAVA实现的一个类库

package cn.edu.nju.software.sd.cll;
 /**
  * ConsoleAppender, implements appender
  * something like the realization of the observer in the observer pattern
  * @author SuSE
  *
  */
 

public class ConsoleAppender implements Appender {

 
    private Layout layout;
  
    
    /**
     * construct of ConsoleAppender.
     * @param layout
     */
	public ConsoleAppender(Layout layout) {
	   
	    this.layout=layout;
	}    
   /**
    * the real function to deal with the 'update' in the observer pattern.
    * @param message
    * @param logger
    */
	public void doLog(String message,Logger logger){
		System.out.println(layout.format(message,logger));
	}
        public void setLayout(Layout layout)  {
                    this.layout=layout;
        }
 
/**
 * realize of the method in the interface 'Appender' 
 */

 
    public void update(Logger logger,String message) {
         doLog(message,logger);
    }

}