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.
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.
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(); If you are using guava, it's quite simple:
final ThreadFactory threadFactory = new ThreadFactoryBuilder() .setNameFormat("Fancy-pool-%02d") .build(); Executors.newFixedThreadPool(10, threadFactory); If you are not a happy guava 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; } }; 
