requestqueue.java

来自「多线程与并发处理是程序设计好坏优劣的重要课题」· Java 代码 · 共 23 行

import java.util.LinkedList;

public class RequestQueue {
    private final LinkedList queue = new LinkedList();
    public synchronized Request getRequest() {
        while (queue.size() <= 0) {
            try {
                System.out.println(Thread.currentThread().getName() + ": wait() begins, queue = " + queue);
                wait();
                System.out.println(Thread.currentThread().getName() + ": wait() ends,   queue = " + queue);
            } catch (InterruptedException e) {      
            }                                       
        }                                           
        return (Request)queue.removeFirst();
    }
    public synchronized void putRequest(Request request) {
        queue.addLast(request);
        System.out.println(Thread.currentThread().getName() + ": notifyAll() begins, queue = " + queue);
        notifyAll();
        System.out.println(Thread.currentThread().getName() + ": notifyAll() ends, queue = " + queue);
    }
}