framework.java

来自「JAVA实现的一个类库」· Java 代码 · 共 113 行

package cn.edu.nju.software.sd.cll;
 
import java.util.Hashtable;
/**
 * FrameWork class ,some like the class of 'Hiererchy' in the Log4j project. 
 * @author SuSE
 *
 */
public class FrameWork {
    
 
	private static  DefaultRootLogger root;
	
    private static Hashtable<String,Logger> RecordLogger=new Hashtable<String,Logger>();
        
        //Hashtable to store the loggers;
    
	 
    
     private static  FrameWork framework;
     private FrameWork(){}
    /**
     *     Singleton pattern
     * @return
     */
     public static FrameWork getframework(){
   
         if (framework==null){
         framework=new FrameWork();
      }
       return framework;
     }

        
	@SuppressWarnings("static-access")
	/**
	 * Default construct
	 */
	public FrameWork(DefaultRootLogger root) {
	    this.root = root;
	    RecordLogger.put("", root);
            // as the root shows no name;
	 }
 


  /**
   * initLog, complete the getLogger process.
   * Something is hidden.
   * return void;
   * 
   * @param Name
   * @return
   */
public static Logger initLog(String Name) {
		
		
	RecordLogger.put(Name, new Logger(Name));
                
		configure(Name);
            
		return RecordLogger.get(Name);
	}
	

   
  
	private static   void configure(String Name) {
           
            if  (RecordLogger.get(Name).readConfig()!=true){
            	
           // System.out.println("No configuration file read in.");
               String temp=Name;
               String parent=temp;
           
			for(int i=temp.lastIndexOf(".");i>-1;i=temp.lastIndexOf("."))
			
			{
				parent=temp.substring(0,i);
				
				if(RecordLogger.get(parent)!=null)
				
				{
					RecordLogger.get(Name).copy(RecordLogger.get(parent));
					return;
				}
				temp=parent;
			}
			RecordLogger.get(Name).copy(root);
		} 
	}
        
	/**
	 * getLogger function,which is called by getLogger method in the LoggerFactory class
	 * the  final realization of the factory pattern.
	 * @param name
	 * @return
	 */
  
    	public static Logger getLogger(String name) {
    		Logger logger =RecordLogger.get(name);
    		 if (logger!=null) 
    		   
    		      return logger;
    		 else 
                     return initLog(name);
    	}
  
 
	
}