最近因项目需要，需要使用socket长连接服务器，但是在网上查资料发现都是服务器的连接池，于是自己动手写了个客户端socket连接池，记之，仅供参考，里面的意义变量请自行替换，废话少说，上代码。
1. socet信息类
package cn.richinfo.cloudp.dm.common.util;
import java.net.Socket;
/**
* @Crop 深圳市xxx科技有限公司
* @author liuxingmi
* @QQ 63972012
* @DateTime 2014-8-25 下午3:21:19
* @Desc 名字服务器连接信息
*/
public class SocketInfo {
/**
* socket
*/
private Socket socket;
/**
* 是否空闲 （是：true 否：false）
*/
private boolean isFree;
/**
* socket id
*/
private Integer socketId;
/**
* 是否为可关闭链接 （是：true 否：false）
*/
private boolean isClosed;
public Socket getSocket() {
return socket;
}
public void setSocket(Socket socket) {
this.socket = socket;
}
public boolean isFree() {
return isFree;
}
public void setFree(boolean isFree) {
this.isFree = isFree;
}
public Integer getSocketId() {
return socketId;
}
public void setSocketId(Integer socketId) {
this.socketId = socketId;
}
public boolean isClosed() {
return isClosed;
}
public void setClosed(boolean isClosed) {
this.isClosed = isClosed;
}
}
2. 链接池工具
package cn.richinfo.cloudp.dm.common.util;
import java.io.IOException;
import java.net.Socket;
import java.util.Map;
import java.util.concurrent.ConcurrentHashMap;
import cn.richinfo.cloudp.common.config.CloudpConfigUtil;
import cn.richinfo.cloudp.common.constant.ConfigConst;
import cn.richinfo.cloudp.common.log.DMLogger;
/**
* @Crop 深圳市xxxx有限公司
* @author liuxingmi
* @QQ 63972012
* @DateTime 2014-8-25 下午3:18:18
* @Desc 分布式名字服务器socket链接池
*/
public class SocketPool {
private static DMLogger logger = DMLogger.getInstance();//日志类
/**
* socketMap
*/
public static ConcurrentHashMap<Integer, SocketInfo> socketMap = new ConcurrentHashMap<Integer, SocketInfo>();
private static SocketPool instance = new SocketPool();
private SocketPool(){}
public static SocketPool getInstance(){
if(instance == null){
synchronized (SocketPool.class) {
if(instance == null){
instance = new SocketPool();
}
}
}
return instance;
}
static {
instance.initSocket(true);
}
/**
* @DateTime 2014-8-25 下午3:18:52
* @User liuxingmi
* @Desc 初始化链接池
* @param isAllReInit 是否全部重新初始化
* @return void
*/
public void initSocket(boolean isAllReInit){
int defaultCount = Integer.parseInt(ConfigConst.SOCKET_DEFAULT_COUNT);
logger.info("nameserver:initSocket", DMLogger.RESULT_OK, "开始初始化分布式名字服务器连接数：" + defaultCount);
for (int i = 0; i < defaultCount; i++) {
if(isAllReInit){
socketMap.put(i, setSocketInfo( i, true, false));
} else {
if(socketMap.get(i) == null || socketMap.get(i).isClosed()){
socketMap.put(i, setSocketInfo( i, true, false));
}
}
}
logger.info("nameserver:initSocket", DMLogger.RESULT_OK, "完成初始化分布式名字服务器连接数");
new CheckSocketThread().start();
}
/**
* @DateTime 2014-8-26 上午10:06:13
* @User liuxingmi
* @Desc 设置socketInfo值
* @param socket
* @param key
* @param isFree
* @param isClosed
* @return SocketInfo
*/
private static SocketInfo setSocketInfo(Integer key, boolean isFree, boolean isClosed){
SocketInfo socketInfo = new SocketInfo();
Socket socket = createSocket();
socketInfo.setFree(isFree);
socketInfo.setSocket(socket);
socketInfo.setSocketId(key);
socketInfo.setClosed(isClosed);
return socketInfo;
}
/**
* @DateTime 2014-8-25 下午3:19:06
* @User liuxingmi
* @Desc 获取名字服务器链接
* @return
* SocketInfo
*/
public SocketInfo getSocketInfo(){
SocketInfo socketInfo = null;
if(socketMap.size() < Integer.parseInt(ConfigConst.SOCKET_DEFAULT_COUNT)){
initSocket(false);
}
if(socketMap.size() > 0){
for (Map.Entry<Integer, SocketInfo> entry : socketMap.entrySet()) {
socketInfo = entry.getValue();
if(socketInfo.isFree() && ! socketInfo.getSocket().isClosed()){
socketInfo.setFree(false);
return socketInfo;
}
}
} else {
logger.info("nameserver:socketInfo", DMLogger.RESULT_FAIL, "名字服务器socket连接池数量为零。");
return null;
}
logger.info("nameserver:socketInfo", DMLogger.RESULT_OK, "所有名字服务器socket链接都忙，创建临时链接。");
socketInfo = setSocketInfo(-1, true, true);
logger.info("nameserver:socketInfo", DMLogger.RESULT_OK, "成功创建服务器socket临时链接。");
return socketInfo;
}
/**
* 释放socket
* @param socketId
*/
public static void distorySocket(Integer socketId){
logger.debug("nameserver:distorySocket", DMLogger.RESULT_OK, "释放名字服务器socket链接。");
SocketInfo socketInfo = socketMap.get(socketId);
socketInfo.setFree(true);
}
/**
* @DateTime 2014-8-25 下午3:19:42
* @User liuxingmi
* @Desc 释放socket
* @param socketInfo
* void
*/
public static void distorySocket(SocketInfo socketInfo){
if(socketInfo == null) return;
if( ! socketInfo.isClosed()){
logger.debug("nameserver:distorySocket", DMLogger.RESULT_OK, "链接池socket，释放资源。");
distorySocket(socketInfo.getSocketId());
return;
}
logger.debug("nameserver:distorySocket", DMLogger.RESULT_OK, "可关闭临时链接，关闭socket");
try {
if(socketInfo.getSocket() != null){
socketInfo.getSocket().close();
}
} catch (IOException e) {
logger.error("nameserver:distorySocket", DMLogger.RESULT_FAIL, "关闭名字服务器socket链接失败", e);
}
socketInfo = null;
}
/**
* @DateTime 2014-8-25 下午3:19:51
* @User liuxingmi
* @Desc 创建socket
* @return
* Socket
*/
public static Socket createSocket(){
String nameServerip1 = CloudpConfigUtil.DM_CONFIG.getNameSerIP1();
int namServerport1 = CloudpConfigUtil.DM_CONFIG.getNameSerPort1();
String nameServerip2 = CloudpConfigUtil.DM_CONFIG.getNameSerIP2();
int namServerport2 = CloudpConfigUtil.DM_CONFIG.getNameSerPort2();
Socket socket = null;
try {// 尝试通过ip1第一次建立连接
socket = new Socket(nameServerip1, namServerport1);
logger.info("nameserver:login", DMLogger.RESULT_OK, "nameServerip1:" + nameServerip1 + ", namServerport1:" + namServerport1);
} catch (IOException e) {
logger.error("nameserver:login", DMLogger.RESULT_FAIL, "first link fail nameServerip1:" + nameServerip1 + ", namServerport1:" + namServerport1, e);
try {
// 如果第一次通过ip1建立连接失败，则进行第二次连接
socket = new Socket(nameServerip2, namServerport2);
logger.info("nameserver:login", DMLogger.RESULT_OK, "nameServerip2:" + nameServerip2 + ", namServerport2:" + namServerport2);
} catch (IOException e1) {
logger.error("nameserver:login", DMLogger.RESULT_FAIL, "second link fail nameServerip2:" + nameServerip2 + ", namServerport2:" + namServerport2, e);
return null;
}
}
return socket;
}
class CheckSocketThread extends Thread{
@Override
public void run() {
while (true) {
logger.debug("nameserver:checkSocket", DMLogger.RESULT_OK, "开始检测分布式链接状态。");
if(socketMap.size() < Integer.parseInt(ConfigConst.SOCKET_DEFAULT_COUNT)){
logger.info("nameserver:checkSocket", DMLogger.RESULT_OK, "分布式名字服务器socket链接小于默认链接数，增加socket链接。");
initSocket(false);
}
for (Map.Entry<Integer, SocketInfo> entry : socketMap.entrySet() ) {
SocketInfo socketInfo = entry.getValue();
if(socketInfo.getSocket() == null || socketInfo.isClosed()){
logger.error("nameserver:checkSocket", DMLogger.RESULT_FAIL, "第"+ entry.getKey()+"个socket链接已关闭，重新连接分布式。",null);
socketInfo.setSocket(createSocket());
} else {
if(socketInfo.isFree()){
boolean flag = NameServerUtils.getInstance().checkHeartbeat(socketInfo);
if( ! flag ){
logger.error("nameserver:checkSocket", DMLogger.RESULT_FAIL, "第"+ entry.getKey()+"个socket链接失败，重新连接分布式。",null);
socketInfo.setSocket(createSocket());
continue;
}
}
logger.debug("nameserver:checkSocket", DMLogger.RESULT_OK, "第"+ entry.getKey()+"个socket链接正常。");
}
}
try {
sleep(Long.valueOf(ConfigConst.SOCKET_CHECK_TIME));
} catch (Exception e) {
}
}
}
}
}
原文地址：http://blog.csdn.net/lxm63972012/article/details/38924533
