How to go about implementing a "fire and forget" behavior with java.util.concurrency? I tried:
ExecutorService executor = Executors.newSingleThreadExecutor();
public void push(Callable<Boolean> task) {
Future<Boolean> future = executor.submit(task);
future.get(timeout, timeoutUnit);
}
but the get()
is blocking until completion. The push()
caller is not interested in the result of the task.
Don't call get()
. submit()
is enough to start the Callable
in a Thread
. You can pass around the Future
and call its get()
when you are ready to get the result (if ever).
The Javadoc states
Submits a value-returning task for execution and returns a Future representing the pending results of the task. The Future's get method will return the task's result upon successful completion.
If you would like to immediately block waiting for a task, you can use constructions of the form result = exec.submit(aCallable).get();
So just don't call get()
.