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Home > Exception Handling > Error In Executor Futuretask

Error In Executor Futuretask


void showSearch(final String target) throws InterruptedException { Future future = executor.submit(new Callable() { public String call() { return; }}); displayOtherThings(); // do other things while searching try { displayText(future.get()); // You can simply counteract those scenarios by passing a timeout: ExecutorService executor = Executors.newFixedThreadPool(1); Future<Integer> future (){ public Result call() throws Exception { mTaskInvoked.set(true); Process.setThreadPriority(Process.THREAD_PRIORITY_BACKGROUND); return postResult(doInBackground(mParams)); } } ; mFuture=new FutureTask(mWorker){ @Override protected I've subclassed ThreadPoolExecutor and I've overridden the "afterExecute" method which is supposed to provide any uncaught exceptions encountered while running a task.

How to create a plot with inclined axes? Source file: 7 private T executeAndWait(Callable callable){ FutureTask task=new FutureTask(callable); mMainHandler.sendMessage(mMainHandler.obtainMessage(MSG_RUN_OBJECT,task)); try { return task.get(); } catch ( InterruptedException e) { return null; } catch ( ExecutionException e) { throw Source file: 7 /** * @param client - a [emailprotected] RawClient} to be used to fetch the bucket properties * @param retrier - the [emailprotected] Retrier} to use * @param How to solve the old 'gun on a spaceship' problem?

Executorservice Futuretask

An ExecutorService is an asynchronous execution mechanism which is capable of executing tasks in the background. Source file: 7 @Test public void testAddInSamePageHavingReadPastWithoutReadTransaction() throws Exception { final ArrayList nodes=createNodes(4); final UnrolledLinkedList list=new UnrolledLinkedList(graphDb(),new IdComparator(),4); final StateSynchronizer sync=new StateSynchronizer(States.class); FutureTask reader=new ThrowingFutureTask(new Callable(){ @Override public Boolean call() Source file: 7 /** * C'tor. * @param executor The executor which should be handled asynchronously. */ public AsynchronousToolExecutor(final IToolExecutor executor){ this.executor=executor; countdownLatch=new CountDownLatch(1); invokeAlreadyCalled=new AtomicBoolean(false); futureTask=new FutureTask(new Callable(){ @Override

Completion may be due to normal termination, an exception, or cancellation -- in all of these cases, this method will return true. The method will block * only if the current thread is the main thread. * * @param task The FutureTask to run * @return The queried task (to aid inline construction) Join them; it only takes a minute: Sign up Handling exceptions from Java ExecutorService tasks up vote 129 down vote favorite 56 I'm trying to use Java's ThreadPoolExecutor class to run Java Future Exception Handling This is likely to be much preferable to subclassing ThreadPoolExecutor.

Example 1 From project PIE, under directory /R2/pie-runtime/src/main/java/com/pieframework/runtime/execution/. Executorservice Futuretask Example Future future = executor.submit(task); try { future.get(); } catch (ExecutionException ex) { ex.getCause().printStackTrace(); } If throws an exception, this will be wrapped in an ExecutionException and thrown by Future.get(). Your afterExecute should be something like this: protected void afterExecute(Runnable r, Throwable t) { super.afterExecute(r, t); if (t == null && r instanceof Future) { try { Future future = (Future) Method Detail cancel booleancancel(booleanmayInterruptIfRunning) Attempts to cancel execution of this task.

The initial delay is zero and the tasks duration is two seconds. Java Executor Unhandled Exception These tasks will not terminate themselves, instead they will wait() to be interrupted by the pool during shutdown. For example, the above construction with submit could be replaced by: FutureTask future = new FutureTask(new Callable() { public String call() { return; }}); executor.execute(future); Memory consistency effects: Actions taken Java supports Threads since JDK 1.0.

  • Source file: 7 /** * Executes a shell command and returns output as a String.
  • In order to periodically run common tasks multiple times, we can utilize scheduled thread pools.
  • InvokeAll Executors support batch submitting of multiple callables at once via invokeAll().
  • Now let's take a deeper look at one of the most important parts of the Concurrency API - the executor services.
  • share|improve this answer answered Jul 31 at 13:23 Cristian Botiza 17017 add a comment| up vote -5 down vote Instead of subclassing ThreadPoolExecutor, I would provide it with a ThreadFactory instance
  • Source file: 7 /** * Wrap callable into future task. * @param callable the callable * @return future task */ public static Future wrap(Callable callable){ final FutureTask task=new FutureTask(callable); final
  • final void runWorker(Worker w) { Thread wt = Thread.currentThread(); Runnable task = w.firstTask; w.firstTask = null; w.unlock(); // allow interrupts boolean completedAbruptly = true; try { while (task != null
  • The method returns a callable that sleeps for a certain amount of time until returning the given result: Callable<String> callable(String result,
  • Is it unreasonable to push back on this?
  • What was the purpose of mentioning the soft hands in Ocean's Eleven?

Executorservice Futuretask Example

How to approach senior colleague who overwrote my work files? 15 Balls Sorting How to make substitute() use another magic mode? Source file: 7 /** * Fire the specified event asynchronously. * @param < T > the result type * @param event the specified event * @return future result * @throws Executorservice Futuretask So it seams like the javadoc is not correct (or very hard to understand...). Executorservice Exception Handling All rights reserved.

This is equivalent to newSingleThreadExecutor() but we could later increase the pool size by simply passing a value larger than one. Inverse permutation index more hot questions question feed lang-java about us tour help blog chat data legal privacy policy work here advertising info mobile contact us feedback Technology Life / Arts You need to implement the UncaughtExceptionHandler interface. TimeUnit is a useful enum for working with units of time. Executorservice Uncaughtexceptionhandler

If successful, and this task has not started when cancel is called, this task should never run. extends Serializable,?>>(cacheMap_.size()); for ( FutureTask

Returns:true if this task was cancelled before it completed isDone booleanisDone() Returns true if this task completed. Java Callable Exception Handling extends Serializable,?>> task : cacheMap_.values()) { ExoCacheExecutorService executor = Executors.newWorkStealingPoolYou can vote up the examples you like and your votes will be used in our system to product more good examples. → Go to Official Java Doc + Save this

This should be the accepted answer. –Joeblackdev Dec 10 '13 at 16:01 3 > is permitted to throw checked exceptions, and these get propagated back to the calling thread: Returns:the computed result Throws: CancellationException - if the computation was cancelled ExecutionException - if the computation threw an exception CancellationException - if the computation was cancelled

The method will block only if the current * thread is the main thread. * * @param task The FutureTask to run * @return The queried task (to aid inline construction) For example: ScheduledExecutorService executor = Executors.newScheduledThreadPool(1); Runnable task = () -> { try { Executors The Concurrency API introduces the concept of an ExecutorService as a higher level replacement for working with threads directly. The first method is capable of executing tasks with a fixed time rate, e.g.

boolean isDone() Returns true if this task completed. Replacing dots in file name with underscores except the extension Physically locating the server Find all matrices that commute with a given square matrix Why don't you connect unused hot and Source file: 7 private Runnable doSubmit(final Runnable task){ try { semaphore.acquire(); count.incrementAndGet(); } catch ( InterruptedException e) { Thread.currentThread().interrupt(); throw new TaskRejectedException("Task could not be submitted because of a thread Methods are provided to check if the computation is complete, to wait for its completion, and to retrieve the result of the computation.

current community chat Stack Overflow Meta Stack Overflow your communities Sign up or log in to customize your list. Executors are capable of running asynchronous tasks and typically manage a pool of threads, so we don't have to create new threads manually. Source file: 7 /** * Creates a new asynchronous task. Reproduced with both client and server.

FutureTask futureTask = new FutureTask(task);; preloads.add(futureTask); } else { preloads.add(executor.submit(task)); } } return preloads; } Example 21 Project: idea-android-studio-plugin File: View source code 6 votes @Override @NotNull public FutureTask