?? usermessagequeue.java
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package com.andowson.onlineuser;
import java.io.Serializable;
import java.util.Map;
import java.util.Queue;
import java.util.Set;
import java.util.concurrent.ConcurrentLinkedQueue;
import java.util.concurrent.ConcurrentMap;
import java.util.concurrent.ConcurrentHashMap;
/**
* UserMessageQueue
* a singleton class
*
* @version 0.0.1 2004/12/22
* @author Andowson Chang
*/
public class UserMessageQueue implements Serializable {
private static final long serialVersionUID = 42L;
private ConcurrentMap<String, ConcurrentLinkedQueue<UserMessage>> container =
new ConcurrentHashMap<String, ConcurrentLinkedQueue<UserMessage>>();
// UserMessageQueue 衡琌
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