Question

I have an Responseobject for representing an post response to a web service. Given this code:

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

Since the server is a little slow I’d like to parallelize the petitions in 3 threads. But I’m don’t know how to make the main thread to wait for the result and retrieve the 3 responses.

Answer 1

I guess you could do something like that to launch the calls in 3 threads and wait for their termination:

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) { }
}