How2 react when mutliple threads finish

[Tom Hughes]

Hi,
I am writing a java client. On startup, it does the following for three different
sets of data (templates, pages and facts).
Send request to server.
Decode reply.
It currently does this serially and I want to multi-thread it.
I know how to spawn 3 threads (one for each set of data).
What I want to do is,
Spawn my three threads.
Wait until they're all finished.
Do something else.
What is the best way to do the "Wait until they're all finished." bit ?
thanks,
Tom

[Peter den Haan]

Look into Thread.join(Thread). This will cause the calling thread to wait until the indicated other thread finishes.
- Peter

[Tom Hughes]

Cheers Peter,
This is the code I came up with. Is it optimal ?

 
    private void loadAllDataConcurrently() {
        //Load pages, templates and products concurrently
        Thread prodLoader = new Thread() {
            public void run() {
                loadProducts();
            }
        };
        prodLoader.start(); // By far the slowest so start first
        
        Thread templateLoader = new Thread() {
            public void run() {
                loadTemplates();
            }
        };
        templateLoader.start();
        
        loadPages();
        try {
            prodLoader.join();
            templateLoader.join();
        } catch (InterruptedException e) {} //Should never happen
    }

[Peter den Haan]

Yep, that's the idea
- Peter