package com.slcf.filter;

import java.util.HashMap;

import javax.servlet.http.HttpSession;

public class MySessionContext {
	private static MySessionContext instance;
	private HashMap<Object, Object> mymap;
	
	private MySessionContext() {
		mymap=new HashMap();
	}
	
	public static MySessionContext getInstance(){
		if(instance == null){
			instance = new MySessionContext();
		}
		return instance;
	}
	
	public synchronized void AddSession(HttpSession session){
		if(session != null){
			mymap.put(session.getId(), session);
		}
	}
	
	public synchronized void DelSession(HttpSession session){
		if(session != null){
			mymap.remove(session.getId());
		}
	} 
	
	public synchronized HttpSession getSession(String sessionId){
		if(sessionId == null){
			return null;
		}
		return (HttpSession) mymap.get(sessionId);
	}	
}