java利用线程池实现处理socket请求的小例子

任务描述，设计一个程序监听本机8790端口，在有socket连接到来时使用线程池创建处理线程，处理完后返回，主程序不参与服务。

 

直接贴代码吧：

 

主控server

 

package com.sdc.callmaxent.socket;import java.io.IOException;import java.net.ServerSocket;import java.net.Socket;import java.util.concurrent.ArrayBlockingQueue;import java.util.concurrent.ThreadPoolExecutor;import java.util.concurrent.TimeUnit;import com.sdc.callmaxent.util.SystemConfig;public class CallMaxentThreadPool {private static int produceTaskSleepTime = 20;private static int produceTaskMaskNumber = 10;private static boolean flag = false;public static void main(String[] args){startServ();//构造线程池System.out.println("Server listening......");int port = SystemConfig.getInstance().getPort();ServerSocket serverSocket = null;try {serverSocket = new ServerSocket(port);} catch (IOException e1) {e1.printStackTrace();}Socket clientSocket = null;ThreadPoolExecutor threadPool = new ThreadPoolExecutor(2,//corePoolSize4, //maximumPoolSize3,//keepAliveTimeTimeUnit.SECONDS, //unitnew ArrayBlockingQueue<Runnable>(3),//workQueuenew ThreadPoolExecutor.DiscardOldestPolicy()//); int i = 0;while(flag){//获得客户端请求try {clientSocket = serverSocket.accept();} catch (IOException e) {e.printStackTrace();}String task = "maxent_task@ " + i;System.out.println("put " + task);threadPool.execute(new CallMaxentThreadPoolTask(clientSocket));i++;}}public static void startServ(){flag = true;}public static void stopServ(){flag = false;}}

 

处理thread程序

 

package com.sdc.callmaxent.socket;import java.io.BufferedReader;import java.io.IOException;import java.io.InputStream;import java.io.InputStreamReader;import java.io.OutputStream;import java.io.PrintWriter;import java.io.Serializable;import java.net.Socket;import com.sdc.callmaxent.util.FileUtil;import com.sdc.callmaxent.util.SocketUtil;import com.sdc.callmaxent.util.SystemConfig;public class CallMaxentThreadPoolTask implements Runnable, Serializable{ private static final long serialVersionUID = 0; private static int consumeTaskSleepTime = 20000; private Socket socket;private InputStream clientInput;private OutputStream clientOutput; CallMaxentThreadPoolTask(Socket socket){this.socket = socket;try{this.clientInput = socket.getInputStream();this.clientOutput = socket.getOutputStream();}catch(IOException e){e.printStackTrace();} } public void run(){ BufferedReader breader = FileUtil.getBufferReader(new InputStreamReader(clientInput));try{//接收到客户端传来信息String strLine = breader.readLine();//参数切分String[] paramlist = strLine.split(",");String maxentPath = SystemConfig.getInstance().getMaxentPath();String cmd = "cmd /c java -mx1024m -jar " + maxentPath + "/maxent.jar";for(int i = 1;i<paramlist.length;i++){cmd += " "+paramlist[i];}System.out.println(Thread.currentThread().getName());System.out.println("Maxent "+paramlist[0]+" is running, please wait!");cmd += " novisible autorun";Process p = Runtime.getRuntime().exec(cmd);p.waitFor();PrintWriter printWriter=new PrintWriter(clientOutput,true); printWriter.println("Finish!");System.out.println("Task "+paramlist[0]+" Finish!");}catch (IOException e) { e.printStackTrace(); }catch(InterruptedException e){ e.printStackTrace(); }finally{FileUtil.close(clientInput);FileUtil.close(clientOutput);SocketUtil.close(socket);} }}

 

测试client端

 

package com.sdc.callmaxent.socket;import java.io.BufferedReader; import java.io.IOException; import java.io.InputStream; import java.io.InputStreamReader; import java.io.OutputStream; import java.io.PrintWriter; import java.net.Socket; import java.net.UnknownHostException; import com.sdc.callmaxent.util.FileUtil;import com.sdc.callmaxent.util.SocketUtil;import com.sdc.callmaxent.util.SystemConfig;public class CallMaxentClient {public static void main(String[] args){try{System.out.println("Start sending......");String ipAddress = SystemConfig.getInstance().getIP();int port = SystemConfig.getInstance().getPort();Socket socket = SocketUtil.getSocket(ipAddress, port);BufferedReader bfReader = FileUtil.getBufferReader(new InputStreamReader(System.in));System.out.println("Waiting....."); String strLine = "1,environmentallayers=F:/test/maxent/testdata/layers,samplesfile=F:/test/maxent/testdata/bradypus.csv,outputdirectory=F:/test/maxent/testdata/outputs,togglelayertype=ecoreg,redoifexists";//String strLine = "environmentallayers=F:/test/maxent/testdata/layers,samplesfile=F:/test/maxent/testdata/bradypus.csv,outputdirectory=F:/test/maxent/testdata/outputs2,togglelayertype=ecoreg,redoifexists";OutputStream outputStream = socket.getOutputStream(); InputStream inputStream = socket.getInputStream();PrintWriter pw = new PrintWriter(outputStream,true); pw.println(strLine);BufferedReader br = new BufferedReader(new InputStreamReader(inputStream)); System.out.println(br.readLine());}catch (UnknownHostException e) { e.printStackTrace(); }catch (IOException e) { e.printStackTrace(); } }}

 

Thread Pool 执行优先级

 

corePoolSize > workQueue > maximumPoolSize -> handler