java 并发学习笔记（二）生产者消费者队列

消费者是LiftOffRunner，他将每个LiftOff对象从BlockingQueue中推出并直接运行，即通过显示的调用run（），使用自己的线程来运行，而不是为每个任务启动一个新线程

package producer_consumer_Queue;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.concurrent.ArrayBlockingQueue;
import java.util.concurrent.BlockingQueue;
import java.util.concurrent.LinkedBlockingDeque;
import java.util.concurrent.SynchronousQueue;


public class TestBlockingQueues {

	/**
	 * @param args
	 */
	public static void main(String[] args) {
		//unlimited size
		test("LinkedBlockingQueue",new LinkedBlockingDeque<LiftOff>());
		//fixed size
		//test("ArrayBlockingQueue",new ArrayBlockingQueue<LiftOff>(6));
		//size of 1
		//test("SynchronousQueue",new SynchronousQueue<LiftOff>());
	}
	static void getKey()
	{
		try {
			new BufferedReader(new InputStreamReader(System.in)).readLine();
		} catch (IOException e) {
			// TODO Auto-generated catch block
			//e.printStackTrace();
			throw new RuntimeException(e);
		}
	}
	static void getKey(String message)
	{
		System.out.println(message);
		getKey();
	}
	static void test(String message,BlockingQueue<LiftOff> queue)
	{
		System.out.println(message);
		LiftOffRunner runner=new LiftOffRunner(queue);
		Thread t=new Thread(runner);
		t.start();
		for(int i=0;i<5;i++)
		{
			runner.add(new LiftOff(i));
		}
		getKey("Press 'Enter' ("+message+")");
		t.interrupt();
		System.out.println("Finished "+message+" test");
	}
}

//消费者
class LiftOffRunner implements Runnable
{
	private BlockingQueue<LiftOff> rockets;
	public LiftOffRunner(BlockingQueue<LiftOff> queue)
	{
		rockets=queue;
	}
	public void add(LiftOff lo)
	{
		rockets.add(lo);
	}
	public void run() {
		try {
			while(!Thread.interrupted())
			{
				LiftOff rocket=rockets.take();
				rocket.run();   //use this thread
			}
		} catch (InterruptedException e) {
			//e.printStackTrace();
			System.out.println("Waking from taken()");
		}
		System.out.println("Exiting LiftOffRunner");
	}
}

class LiftOff implements Runnable
{
	private int count;
	public LiftOff(int i) {
		this.count=i;
	}
	public void run() {
		System.out.println("wawa:"+count);
	}

}

各个任务由main（）放置到了BlockingQueue中，并且由LiftOffRunner从BlockingQueue中取出，LiftOffRunner可以忽略同步问题，由BlockingQueue解决了。