java - 在java中并行化网络请愿

Question

我有一个 Response 对象，用于表示对 Web 服务的发布响应。鉴于此代码:

Response resp1= Server.request(a);
Response resp2= Server.request(b);
Response resp3= Server.request(c);
if (resp1.isOk() && resp2.isOk() && resp3.isOk()){
    // Do stuff
}

由于服务器有点慢，我想在 3 个线程中并行处理请求。但我不知道如何让主线程等待结果并检索 3 个响应。

Answer 1

我想你可以做类似的事情来在 3 个线程中启动调用并等待它们终止:

private Response resp1, resp2, resp3;

protected void doRequests() {
    Thread thread1 = new Thread() {
        public void run() {
            resp1= Server.request(a);           
        }
    };
    Thread thread2 = new Thread() {
        public void run() {
            resp1= Server.request(a);           
        }
    };
    Thread thread3 = new Thread() {
        public void run() {
            resp1= Server.request(a);           
        }
    };

    thread1.start();
    thread2.start();
    thread3.start();

    try { thread1.join(); } catch(InterruptedException e) { }
    try { thread2.join(); } catch(InterruptedException e) { }
    try { thread3.join(); } catch(InterruptedException e) { }
}