java版tcp proxy

package com.xiaomi.dbproxy.action;import java.net.ServerSocket;import java.net.Socket;import java.util.Date;import java.util.List;import java.util.Random;import com.xiaomi.dbproxy.model.proxyServer;import com.xiaomi.dbproxy.model.proxyService;import com.xiaomi.dbproxy.tools.Log;public class tcpProxy implements Runnable {proxyServer server;Random rand = new Random(new Date().getTime());public tcpProxy(){}public tcpProxy(proxyServer server) {this.server = server;}public static Socket getSocket(List<proxyService> list){Socket outgoing = null;for(proxyService item : list){try{if(item.cantry()){outgoing = new Socket(item.getHost(), item.getPort());}else{continue;}return outgoing;}catch(Exception e){item.setEcount();continue;}}return null;}@Overridepublic void run() {ServerSocket ss = null;Socket incoming, outgoing = null;try {ss = new ServerSocket(this.server.getPort());} catch (Exception e) {Log.logError(e);}int index = 0;int len = this.server.getList().size();while (true) {try {incoming = ss.accept();proxyService ps = this.server.getList().get(index);try{if(ps.cantry()){outgoing = new Socket(ps.getHost(), ps.getPort());}else{outgoing = tcpProxy.getSocket(this.server.getList());}}catch(Exception ex){ps.setEcount();outgoing = tcpProxy.getSocket(this.server.getList());}if(outgoing==null||!outgoing.isConnected()){throw new Exception("server: "+this.server.getPort()+" can't connect service");}proxyThread thread1 = new proxyThread(incoming, outgoing);proxyThread thread2 = new proxyThread(outgoing, incoming);thread1.start();thread2.start();} catch (Exception e) {Log.logError(e);}finally{index++;if(index>=len){index=0;}}}}public proxyServer getServer() {return server;}public void setServer(proxyServer server) {this.server = server;}}

package com.xiaomi.dbproxy.action;import java.io.InputStream;import java.io.OutputStream;import java.net.Socket;import com.xiaomi.dbproxy.tools.Log;import com.xiaomi.dbproxy.tools.proxyConfig;public class proxyThread extends Thread {Socket incoming, outgoing;public proxyThread(Socket in, Socket out) {incoming = in;outgoing = out;}public void run() {byte[] buffer = new byte[proxyConfig.IO_BUFFER];int numberRead = 0;OutputStream ToClient;InputStream FromClient;try {ToClient = outgoing.getOutputStream();FromClient = incoming.getInputStream();while (true) {numberRead = FromClient.read(buffer, 0, proxyConfig.IO_BUFFER);if (numberRead == -1) {incoming.close();outgoing.close();}ToClient.write(buffer, 0, numberRead);}} catch (Exception e) {Log.logError(e);}}}