ExecutorService, how to wait for all tasks to finish

Question

What is the simplest way to to wait for all tasks of ExecutorService to finish? My task is primarily computational, so I just want to run a large number of jobs

Answer 1

I will just wait for the executor to terminate with a specified timeout that you think it is suitable for the tasks to complete.

 try {  
         //do stuff here 
         exe.execute(thread);
    } finally {
        exe.shutdown();
    }
    boolean result = exe.awaitTermination(4, TimeUnit.HOURS);
    if (!result)

    {
        LOGGER.error("It took more than 4 hour for the executor to stop, this shouldn't be the normal behaviour.");
    }