java socketio server 端 笔记

项目需要做web端实时推送 引用了socketio来实现，今天做下笔记
需要的jar
socketio.jar
以下是socketio.jar依赖的jar包
[img]http://dl2.iteye.com/upload/attachment/0108/8120/c4a885d4-16fb-3eda-820f-2fe1a24addff.jpg[/img]

import java.util.HashMap;
import java.util.LinkedList;
import java.util.List;
import java.util.UUID;

import org.apache.commons.lang.StringUtils;

import com.corundumstudio.socketio.AckRequest;
import com.corundumstudio.socketio.Configuration;
import com.corundumstudio.socketio.SocketIOClient;
import com.corundumstudio.socketio.SocketIOServer;
import com.corundumstudio.socketio.listener.ConnectListener;
import com.corundumstudio.socketio.listener.DataListener;
import com.corundumstudio.socketio.listener.DisconnectListener;
import com.wafer.cloud.task.model.RegInfo;
import com.wafer.cloud.task.model.SocketDataObj;

/**
 * 
 * @author Chunf
 *
 * @Time 2015年5月22日
 */
public class SocketioServer implements Runnable {

	//静态消息列表，SocketDataObj实体类 userid，message  getter&setter
	private static LinkedList<SocketDataObj> msgList = new LinkedList<SocketDataObj>();
	//server配置容器
	private static Configuration conf = null;
	//server已配置标识
	private static boolean conf_flag = false;
	//server已启动标识
	private static boolean server_flag = false;
	//server
	private static SocketIOServer server = null;
	//客户端暂存
	private static HashMap<String, SocketIOClient> client_cache = new HashMap<String, SocketIOClient>();
	//用户客户端关系暂存
	private static HashMap<UUID,String> user_client_cache = new HashMap<UUID,String>();

	//构造器
	public SocketioServer(List<SocketDataObj> list) {
		if (!list.isEmpty()) {
			synchronized (msgList) {
				for (SocketDataObj s : list) {
					SocketioServer.msgList.add(s);
					msgList.notify();   //当有新的数据放入时，释放锁
				}
			}
		}
	}

	//线程执行器
	@Override
	public void run() {
		// TODO Auto-generated method stub
		while (true) {//打开线程
			synchronized (msgList) {  //获取锁
				if (!server_flag) {
					this.getConfig();
					server = new SocketIOServer(conf);
					this.startServer();
				}
				if (!msgList.isEmpty()) { //如果消息列表有数据，则需要推送
					SocketDataObj sdo = msgList.getFirst();
					String userid = sdo.getUserid();
					SocketIOClient client = client_cache.get(userid);
					if (client != null) {
						client.sendEvent("msg", sdo.getMessage());
						msgList.removeFirst();
					}
				} else {
					try {
						msgList.wait();     //如果消息列表无数据则wait 保持线程
					} catch (InterruptedException e) {
						// TODO Auto-generated catch block
						e.printStackTrace();
					}
				}
			}
		}
	}

	//生成配置容器
	private void getConfig() {
		if (!conf_flag) {
			conf = new Configuration();
			try {
				String hostName = PropertiesReader.getValByKey("socketioIp");
				String port = PropertiesReader.getValByKey("socketPort");
				if (hostName != null && !StringUtils.isEmpty(hostName)
						&& port != null && !StringUtils.isEmpty(port)) {
					conf.setHostname(hostName);
					conf.setPort(Integer.parseInt(port));
					conf_flag = true;
				}
			} catch (Exception e) {
				try {
					throw new Exception("获取配置信息出错！");
				} catch (Exception e1) {
					// TODO Auto-generated catch block
					e1.printStackTrace();
				}
			}
		}
	}

	//启动server增加监听器
	private void startServer() {
		if (!server_flag) {
			this.getConfig();
			server.start();
			server_flag = true;
			server.addConnectListener(new ConnectListener() {
				@Override
				public void onConnect(SocketIOClient client) {
					// TODO Auto-generated method stub
				}
			});

			server.addDisconnectListener(new DisconnectListener() {
				@Override
				public void onDisconnect(SocketIOClient client) {
					// TODO Auto-generated method stub
					//根据客户端sessionID获取用户与client缓存中的信息
					String userid = user_client_cache.get(client.getSessionId());
					if(userid!=null){
						if (client_cache.get(userid).getSessionId().equals(client.getSessionId())){ //如果当前缓存中的client就是断开的client 
							//清除当前信息
							client_cache.remove(userid);
						}
						//清除关系缓存中的信息
						user_client_cache.remove(client.getSessionId());
					}
				}
			});

			//增加regId监听,regId是与前台监听名对应一致的。当前台客户端连接上server后，向后台发送一个regId值，后台将这个值作为该客户端的唯一标识，并与client绑定存储
			//regInfo实体类中只有一个属性就是userid + getter&setter 
			server.addEventListener("regId", RegInfo.class,
					new DataListener<RegInfo>() {
						//实现dataListener的回调
						@Override
						public void onData(SocketIOClient client, RegInfo data,
								AckRequest ackSender) throws Exception {
							// TODO Auto-generated method stub
							//userid即为前台传到后台的regId
							String userid = data.getUserID();
							if (userid != null
									&& StringUtils.isNotEmpty(userid)) {
								//由于一个客户端是外部轮询的，所以一直在变化
								//在客户端缓存中清除原有属于该userid的客户端
								client_cache.remove(userid);
								//增加新的客户端
								client_cache.put(userid, client);
								//向用户与客户端存储中存入新的client
								user_client_cache.put(client.getSessionId(), userid);
								client.sendEvent("regOK", data);
								System.out.println("注册成功！key=" + userid);
							}
						}

					});
		}
	}

	@SuppressWarnings("unused")
	private void stopServer() {
		if (server_flag) {
			server.stop();
			server_flag = false;
		}
	}
}

如果用cache作为暂存 效果更佳！