CODEWITHSUNDEEP
javamultithreadingexecutorservice
dublintech
dublintech

Reputation: 17785

Adding more information to Thread Executors?

It is possible to create various type of Thread Executors in Java, singleThreadedExecutor, fixedThreadedExecutor etc. Is there any way I can add something so that when I invoke getThreadName() and getThreadID() on an executing thread, I can see what Thread executor it has come from?

Thanks.

Upvotes: 1

Views: 238

Answers (3)

Tomasz Nurkiewicz
Tomasz Nurkiewicz

Reputation: 340763

If you are using , it's quite simple:

final ThreadFactory threadFactory = new ThreadFactoryBuilder()
        .setNameFormat("Fancy-pool-%02d")
        .build();
Executors.newFixedThreadPool(10, threadFactory);

If you are not a happy user, you can implement it yourself:

final ThreadFactory threadFactory = new ThreadFactory() {
    final AtomicInteger id = new AtomicInteger();

    @Override
    public Thread newThread(Runnable r) {
        final Thread thread = new Thread(r);
        thread.setName("Fancy-pool-" + id.incrementAndGet());
        return thread;
    }
};

See also:

Upvotes: 1

Gray
Gray

Reputation: 116888

If you are taking about the names of the threads when the submitted tasks are running then I'd recommend using a ThreadGroup. You could also use a ThreadLocal but that sounds more like a hack.

To use the ThreadGroup you would need to inject your own ThreadFactory to the executor.

final ThreadGroup threadGroup = new ThreadGroup("someThreadPoolName");
threadPool = Executors.newFixedThreadPool(10, new ThreadFactory() {
    public Thread newThread(Runnable r) {
        Thread thread = new Thread(threadGroup, r);
        return thread;
    }
});

Then a thread could do:

String myThreadPollName = Thread.currentThread().getThreadGroup().getName();

Upvotes: 1

Sean Owen
Sean Owen

Reputation: 66886

Yes. You supply these factory methods with a ThreadFactory implementation. This is a thing that makes a Thread from a Runnable. So you can do whatever you like in the method, such as set its name, priority or daemon status -- even employ a custom Thread subclass.

Upvotes: 1

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