Java 5.0 多线程编程实践
作者： 来源： 添加时间：2006-5-21 20:54:30服务器端的完整实现代码如下：
package com.andrew;
import java.io.DataOutputStream;
import java.io.IOException;
import java.io.Serializable;
import java.net.ServerSocket;
import java.net.Socket;
import java.util.concurrent.ArrayBlockingQueue;
import java.util.concurrent.BlockingQueue;
import java.util.concurrent.Callable;
import java.util.concurrent.ExecutionException;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
import java.util.concurrent.Future;
import java.util.concurrent.RejectedExecutionHandler;
import java.util.concurrent.ThreadPoolExecutor;
import java.util.concurrent.TimeUnit;
import java.util.concurrent.locks.ReentrantLock;
public class Server {
private static int produceTaskSleepTime = 100;
private static int consumeTaskSleepTime = 1200;
private static int produceTaskMaxNumber = 100;
private static final int CORE_POOL_SIZE = 2;
private static final int MAX_POOL_SIZE = 100;
private static final int KEEPALIVE_TIME = 3;
private static final int QUEUE_CAPACITY = (CORE_POOL_SIZE + MAX_POOL_SIZE) / 2;
private static final TimeUnit TIME_UNIT = TimeUnit.SECONDS;
private static final String HOST = "127.0.0.1";
private static final int PORT = 19527;
private BlockingQueue
//private ThreadPoolExecutor serverThreadPool = null;
private ExecutorService pool = null;
private RejectedExecutionHandler rejectedExecutionHandler = new ThreadPoolExecutor.DiscardOldestPolicy();
private ServerSocket serverListenSocket = null;
private int times = 5;
public void start() {
// You can also init thread pool in this way.
/*serverThreadPool = new ThreadPoolExecutor(CORE_POOL_SIZE,
MAX_POOL_SIZE, KEEPALIVE_TIME, TIME_UNIT, workQueue,
rejectedExecutionHandler);*/
pool = Executors.newFixedThreadPool(10);
try {
serverListenSocket = new ServerSocket(PORT);
serverListenSocket.setReuseAddress(true);
System.out.println("I'm listening");
while (times-- >0) {
Socket socket = serverListenSocket.accept();
String welcomeString = "hello";
//serverThreadPool.execute(new ServiceThread(socket, welcomeString));
pool.execute(new ServiceThread(socket));
}
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
cleanup();
}
public void cleanup() {
if (null != serverListenSocket) {
try {
serverListenSocket.close();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
//serverThreadPool.shutdown();
pool.shutdown();
}
public static void main(String args[]) {
Server server = new Server();
server.start();
}
}
class ServiceThread implements Runnable, Serializable {
private static final long serialVersionUID = 0;
private Socket connectedSocket = null;
private String helloString = null;
private static int count = 0;
private static ReentrantLock lock = new ReentrantLock();
ServiceThread(Socket socket) {
connectedSocket = socket;
}
public void run() {
increaseCount();
int curCount = getCount();
helloString = "hello, id = " + curCount + "\r\n";
ExecutorService executor = Executors.newSingleThreadExecutor();
Future
DataOutputStream dos = null;
try {
dos = new DataOutputStream(connectedSocket.getOutputStream());
dos.write(helloString.getBytes());
try {
dos.write("let's do soemthing other.\r\n".getBytes());
String result = future.get();
dos.write(result.getBytes());
} catch (InterruptedException e) {
e.printStackTrace();
} catch (ExecutionException e) {
e.printStackTrace();
}
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} finally {
if (null != connectedSocket) {
try {
connectedSocket.close();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
if (null != dos) {
try {
dos.close();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
executor.shutdown();
}
}
private int getCount() {
int ret = 0;
try {
lock.lock();
ret = count;
} finally {
lock.unlock();
}
return ret;
}
private void increaseCount() {
try {
lock.lock();
++count;
} finally {
lock.unlock();
}
}
}
class TimeConsumingTask implements Callable
public String call() throws Exception {
System.out.println("It's a time-consuming task, you'd better retrieve your result in the furture");
return "ok, here's the result: It takes me lots of time to produce this result";
}
}
运行程序
运行服务端，客户端只需使用telnet 127.0.0.1 19527 即可看到信息如下：
第 2 页，共 2 页 [1] [2]
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