import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.net.InetSocketAddress;
import java.net.ServerSocket;
import java.net.Socket;
import java.util.Date;
import java.util.HashMap;
import java.util.Map;
import org.dom4j.Document;
import org.dom4j.DocumentException;
import org.dom4j.DocumentHelper;
import cn.edu.zju.cst.mina.im.server.entity.User;
import cn.edu.zju.cst.mina.im.server.handler.ServerControler;
public class UserStateManage extends Thread {
//在线用户状态列表
static HashMap<Integer, UserState> userStateList = new HashMap<Integer, UserState>();
Object hashLock = new Object();
//当前的连接数和工作线程数
static int workThreadNum = 0;
static int socketConnect = 0;
private ServerSocket serverSocket;
//服务器IP
private String host = "10.82.81.79";
//服务器端口
private int stateReportPort = 60001;
//设置心跳包的结束标记
String endFlag = "</protocol>";
CharSequence csEndFlag = endFlag.subSequence(0, 10);
//扫描间隔
private int scanTime = 1800;
@Override
public void run() {
//绑定端口,并开始侦听用户的心跳包
serverSocket = startListenUserReport(stateReportPort);
if(serverSocket == null){
System.out.println("【创建ServerSocket失败！】");
return;
}
//启动扫描线程
Thread scanThread = new Thread(new scan());
scanThread.start();
//等待用户心跳包请求
while(true){
Socket socket = null;
try {
socketConnect = socketConnect + 1;
//接收客户端的连接
socket = serverSocket.accept();
//为该连接创建一个工作线程
Thread workThread = new Thread(new Handler(socket));
//启动工作线程
workThread.start();
} catch (IOException e) {
e.printStackTrace();
}
}
}
/**
* 创建一个ServerSocket来侦听用户心跳包请求
* @param port 指定的服务器端的端口
* @return 返回ServerSocket
* @author dream
*/
public ServerSocket startListenUserReport(int port){
try {
ServerSocket serverSocket = new ServerSocket();
if(!serverSocket.getReuseAddress()){
serverSocket.setReuseAddress(true);
}
serverSocket.bind(new InetSocketAddress(host,port));
System.out.println("【开始在"+serverSocket.getLocalSocketAddress()+"上侦听用户的心跳包请求！】");
return serverSocket;
} catch (IOException e) {
System.out.println("【端口"+port+"已经被占用！】");
if (serverSocket != null) {
if (!serverSocket.isClosed()) {
try {
serverSocket.close();
} catch (IOException e1) {
e1.printStackTrace();
}
}
}
}
return serverSocket;
}
//工作线程类
class Handler implements Runnable{
private Socket socket;
UserState us = null;
User newUser = null;
private int userId;
private int userState;
/**
* 构造函数，从调用者那里取得socket
* @param socket 指定的socket
* @author dream
*/
public Handler(Socket socket){
this.socket = socket;
}
/**
* 从指定的socket中得到输入流
* @param socket 指定的socket
* @return 返回BufferedReader
* @author dream
*/
private BufferedReader getReader(Socket socket){
InputStream is = null;
BufferedReader br = null;
try {
is = socket.getInputStream();
br = new BufferedReader(new InputStreamReader(is));
} catch (IOException e) {
e.printStackTrace();
}
return br;
}
public void run() {
try{
workThreadNum = workThreadNum +1;
System.out.println("【第"+workThreadNum+"个的连接:"+socket.getInetAddress()+":"+socket.getPort()+"】");
BufferedReader br = getReader(socket);
String meg = null;
StringBuffer report = new StringBuffer();
while ((meg = br.readLine()) != null) {
report.append(meg);
if (meg.contains(csEndFlag)) {
us = getReporterUserState(meg, socket);
synchronized (hashLock) {
userStateList.put(userId, us);
}
}
}
}catch(IOException e){
System.out.println("【客户:"+newUser.getUser_id()+"已经断开连接！】");
userStateList.remove( userId );
announceStateChange( userId , -1);
}finally{
if(socket != null){
try {
//断开连接
socket.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}
}
private UserState getReporterUserState(String meg , Socket socket){
UserState us = new UserState();
try {
Document requestDoc = DocumentHelper.parseText(meg);
newUser = ServerControler.parseXmlToUserState(requestDoc,socket);
userId = newUser.getUser_id();
userState = newUser.getUser_state();
us.setFlag(2);
us.setUser_state( userState );
us.setUser_id( userId );
us.setUser_ip(newUser.getUser_ip());
us.setUser_port(newUser.getUser_port());
} catch (DocumentException e) {
System.out.println("【来自客户端的信息不是一个合法的心跳包协议】");
}
return us;
}
}
//扫描线程
class scan implements Runnable{
public void run() {
while (true) {
System.out.println("*******"+new Date()+"：扫描线程开始扫描"+"*******");
synchronized (hashLock) {
if(!userStateList.isEmpty()){
//遍历在线用户列表
for (Map.Entry<Integer, UserState> entry : userStateList.entrySet()) {
int flag = entry.getValue().getFlag();
if ( (flag - 1) < 0) {
//在这里通知该用户的好友其状态发生改变
// announceStateChange(entry.getKey() , 0);
}else{
entry.getValue().setFlag(flag - 1);
userStateList.put(entry.getKey(), entry.getValue());
}
System.out.println(entry.getKey() + "-->" + entry.getValue().toString());
}
}else{
System.out.println("现在还没有在线用户！");
}
}
//实现定时扫描
try {
sleep(scanTime);
} catch (InterruptedException e) {
e.printStackTrace();
}
}
}
}
private void announceStateChange(int userId , int state){
System.out.println("通知其好友!");
}
/**
* 查询一个用户是否在线
* @param userId 指定要查询状态的用户的ID
* @return true 在线； false 不在线；
* @author dream
*/
public boolean isAlive(int userId){
synchronized (hashLock) {
return userStateList.containsKey(userId);
}
}
/**
* 返回指定用户ID的状态
* @param userId 指定要查询状态的用户的ID
* @return >0 该用户在线; -1 该用户离线
* @author dream
*/
public int getUserState(int userId){
synchronized (hashLock) {
if(userStateList.containsKey(userId)){
return userStateList.get(userId).getUser_state();
}else{
return -1;
}
}
}
public Object getHashLock() {
return hashLock;
}
public void setHashLock(Object hashLock) {
this.hashLock = hashLock;
}
public String getHost() {
return host;
}
public void setHost(String host) {
this.host = host;
}
public int getStateReportPort() {
return stateReportPort;
}
public void setStateReportPort(int stateReportPort) {
this.stateReportPort = stateReportPort;
}
public String getEndFlag() {
return endFlag;
}
public void setEndFlag(String endFlag) {
this.endFlag = endFlag;
}
public int getScanTime() {
return scanTime;
}
public void setScanTime(int scanTime) {
this.scanTime = scanTime;
}
public static HashMap<Integer, UserState> getUserStateList() {
return userStateList;
}
public static int getWorkThreadNum() {
return workThreadNum;
}
public static int getSocketConnect() {
return socketConnect;
}
//测试本函数的main函数
public static void main(String arg[]){
UserStateManage usm = new UserStateManage();
usm.start();
}
}