Worker Thread模式
工人线程Worker thread会逐个取回工作并进行处理,当所有工作全部完成后,工人线程会等待新的工作到来
5个工人线程从传送带取数据,3个传送工人线程将数据放入传送带
public class Channel { private final static int MAX_REQUEST = ; private final Request[] requestQueue; private int head; private int tail; private int count; private final WorkerThread[] workerPool; public Channel(int workers) {
this.requestQueue = new Request[MAX_REQUEST];
this.head = ;
this.tail = ;
this.count = ;
this.workerPool = new WorkerThread[workers];
this.init();
} private void init() {
for (int i = ; i < workerPool.length; i++) {
workerPool[i] = new WorkerThread("【工人:"+i+"】", this);
}
} /**
* push switch to start all of worker to work.
*/
public void startWorker() {
Arrays.asList(workerPool).forEach(WorkerThread::start);
} public synchronized void put(Request request) {
while (count >= requestQueue.length) {
try {
this.wait();
} catch (Exception e) {
}
} this.requestQueue[tail] = request;
this.tail = (tail + ) % requestQueue.length;
this.count++;
this.notifyAll();
} public synchronized Request take() {
while (count <= ) {
try {
this.wait();
} catch (InterruptedException e) {
e.printStackTrace();
}
} Request request = this.requestQueue[head];
this.head = (this.head + ) % this.requestQueue.length;
this.count--;
this.notifyAll();
return request;
}
}
public class Request { private final String name; private final int number; public Request(final String name, final int number) {
this.name = name;
this.number = number;
} public void execute() {
System.out.println(Thread.currentThread().getName() + " executed " + this);
} @Override
public String toString() {
return " Request=> No." + number + " Name." + name;
}
}
public class TransportThread extends Thread {
private final Channel channel; private static final Random random = new Random(System.currentTimeMillis()); public TransportThread(String name, Channel channel) {
super(name);
this.channel = channel;
} @Override
public void run() {
try {
for (int i = ; true; i++) {
Request request = new Request(getName(), i);
//向channel中放入request对象(谁放的,编号是多少)
this.channel.put(request);
Thread.sleep(random.nextInt(1_000));
}
} catch (Exception e) {
}
}
}
public class WorkerThread extends Thread { private final Channel channel; private static final Random random = new Random(System.currentTimeMillis()); public WorkerThread(String name, Channel channel) {
super(name);
this.channel = channel;
} @Override
public void run() {
while (true) {
//取出request,执行里面的方法
channel.take().execute();
try {
Thread.sleep(random.nextInt(1_000));
} catch (InterruptedException e) {
e.printStackTrace();
}
}
}
}
public class Test {
public static void main(String[] args) { final Channel channel = new Channel();
channel.startWorker(); new TransportThread("Mark", channel).start();
new TransportThread("Jack", channel).start();
new TransportThread("Irish", channel).start();
}
}
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