db.java

留言板模块源码

package com.ibm.guestbook.model;

import java.util.HashMap;

public class DB {
	private static HashMap<Integer, Message> db = new HashMap<Integer, Message>();
	public static int currentNumber = 0;

	public static void insert(Message message) {
		db.put(message.getId(), message);
	}
	
	public static Message getMessage(int key){
		return db.get(key);
	}

	public static HashMap<Integer, Message> getMessages() {
		return db;
	}
	
	public static synchronized int getId(){
		return currentNumber++;
	}
	
	public static void delete(int key){
		db.remove(key);
	}
}