java.util.concurrent.FutureTask Java Examples

public void setDelegator(Delegator delegator) {
    this.delegator = delegator;
    this.delegatorName = delegator.getDelegatorName();
    this.entityEcaReaderName = EntityEcaUtil.getEntityEcaReaderName(delegator.getDelegatorBaseName());

    Callable<DispatchContext> creator = new Callable<DispatchContext>() {
        public DispatchContext call() {
            return EntityServiceFactory.getDispatchContext(DelegatorEcaHandler.this.delegator);
        }
    };
    FutureTask<DispatchContext> futureTask = new FutureTask<DispatchContext>(creator);
    if (this.dctx.compareAndSet(null, futureTask)) {
        ExecutionPool.GLOBAL_BATCH.submit(futureTask);
    }

    //preload the cache
    EntityEcaUtil.getEntityEcaCache(this.entityEcaReaderName);
}
 

public Future<Collection<Future<Content>>> addContent(final Collection<Content> col) {

		final FutureTask<Collection<Future<Content>>> fu = new FutureTask<Collection<Future<Content>>>(new Callable<Collection<Future<Content>>>() {
			@Override
			public Collection<Future<Content>> call() {
				Thread.currentThread().setPriority(Thread.NORM_PRIORITY);
				try {
					return universe.addContentLater(col);
				} catch (final Throwable e) {
					IJError.print(e);
					return null;
				}
		}});

		launchers.submit(new Runnable() { @Override
		public void run() {
			executors.submit(fu);
		}});

		return fu;
	}
 

@Override
public Future<?> submit(Runnable task) {
	try {
		if (this.concurrentExecutor instanceof ExecutorService) {
			return ((ExecutorService) this.concurrentExecutor).submit(task);
		}
		else {
			FutureTask<Object> future = new FutureTask<Object>(task, null);
			this.concurrentExecutor.execute(future);
			return future;
		}
	}
	catch (RejectedExecutionException ex) {
		throw new TaskRejectedException(
				"Executor [" + this.concurrentExecutor + "] did not accept task: " + task, ex);
	}
}
 

/**
 * Generates the authentication encryption key in a background thread (if necessary).
 */
private static void triggerMacKeyGeneration() {
    synchronized (sLock) {
        if (sKey != null || sMacKeyGenerator != null) {
            return;
        }

        sMacKeyGenerator = new FutureTask<SecretKey>(new Callable<SecretKey>() {
            // SecureRandomInitializer addresses the bug in SecureRandom that "TrulyRandom"
            // warns about, so this lint warning can safely be suppressed.
            @SuppressLint("TrulyRandom")
            @Override
            public SecretKey call() throws Exception {
                KeyGenerator generator = KeyGenerator.getInstance(MAC_ALGORITHM_NAME);
                SecureRandom random = new SecureRandom();
                SecureRandomInitializer.initialize(random);
                generator.init(MAC_KEY_BYTE_COUNT * 8, random);
                return generator.generateKey();
            }
        });
        AsyncTask.THREAD_POOL_EXECUTOR.execute(sMacKeyGenerator);
    }
}
 

public void testMemoryLimit() throws Exception {
  LOG.info("Starting testMemoryLimit");
  JobConf conf = new JobConf();
  conf.setInt(CoronaConf.NODE_RESERVED_MEMORY_MB, Integer.MAX_VALUE);
  corona = new MiniCoronaCluster.Builder().conf(conf).numTaskTrackers(2).build();
  final JobConf jobConf = corona.createJobConf();
  long start = System.currentTimeMillis();
  FutureTask<Boolean> task = submitSleepJobFutureTask(jobConf);
  checkTaskNotDone(task, 10);
  NodeManager nm =  corona.getClusterManager().getNodeManager();
  nm.getResourceLimit().setNodeReservedMemoryMB(0);
  Assert.assertTrue(task.get());
  long end = System.currentTimeMillis();
  LOG.info("Task Done. Verifying");
  new ClusterManagerMetricsVerifier(corona.getClusterManager(),
      1, 1, 1, 1, 1, 1, 0, 0).verifyAll();
  LOG.info("Time spent for testMemoryLimit:" +
      (end - start));
}
 

@Test
public void testFuture() throws Exception {
    JexlScript e = JEXL.createScript("while(true);");
    FutureTask<Object> future = new FutureTask<Object>(e.callable(null));

    ExecutorService executor = Executors.newFixedThreadPool(1);
    executor.submit(future);
    Object t = 42;
    try {
        t = future.get(100, TimeUnit.MILLISECONDS);
        Assert.fail("should have timed out");
    } catch (TimeoutException xtimeout) {
        // ok, ignore
        future.cancel(true);
    } finally {
        executor.shutdown();
    }

    Assert.assertTrue(future.isCancelled());
    Assert.assertEquals(42, t);
}
 

public static PsiDirectory writeDirectory(PsiDirectory dir, DirectoryWrapper dirWrapper, Project project) {
    if (dir == null) {
        //todo print error
        return null;
    }

    RunnableFuture<PsiDirectory> runnableFuture = new FutureTask<>(() ->
            ApplicationManager.getApplication().runWriteAction(new Computable<PsiDirectory>() {
                @Override
                public PsiDirectory compute() {
                    return writeDirectoryAction(dir, dirWrapper, project);
                }
            }));

    ApplicationManager.getApplication().invokeLater(runnableFuture);

    try {
        return runnableFuture.get();
    } catch (InterruptedException | ExecutionException e) {
        Logger.log("runnableFuture  " + e.getMessage());
        Logger.printStack(e);
    }

    return null;
}
 

@Override
public Future<ModelNode> deploy(final ModelNode operation, final ExecutorService executorService) {
    try {
        deploymentOperation.set(operation);
        final FutureTask<ModelNode> task = new FutureTask<ModelNode>(new Callable<ModelNode>() {
            @Override
            public ModelNode call() throws Exception {
                deploymentDoneLatch.await();
                return deploymentResults.get();
            }
        });
        executorService.submit(task);
        return task;
    } finally {
        scanDoneLatch.countDown();
    }
}
 

/**
 * Blocks until the given condition evaluates to true. The condition is evaluated every @code{frequency}
 * milliseconds, so, the given condition should be an idempotent operation.
 * If the condition is not met within the given timeout, an exception is thrown.
 *
 * @param condition the condition to wait for
 * @param timeout the timeout value
 * @param timeUnit the unit for the timeout
 * @param frequency the frequency of the condition's evaluation in milliseconds
 */
public static void until(Callable<Boolean> condition, long timeout, TimeUnit timeUnit, long frequency) {
    FutureTask<Void> futureTask = new FutureTask<Void>(() -> {
        while (!condition.call()) {
            Thread.sleep(frequency);
        }
        return null;
    });

    ExecutorService executor = Executors.newFixedThreadPool(1);
    executor.submit(futureTask);
    try {
        futureTask.get(timeout, timeUnit);
    } catch (InterruptedException | ExecutionException | TimeoutException e) {
        futureTask.cancel(true);
        e.printStackTrace();
        Assert.fail(e.getMessage());
    }
}
 

private void _test(EchoServer server) throws Exception {

        int port =  new Random().nextInt(60000) + 1000;
        server.start(port);

        int threadCount = 100;
        Future[] futures = new Future[threadCount];
        for (int i = 0; i < threadCount; i++) {
            final String msg = "task-" + i;
            FutureTask<Boolean> task = new FutureTask<>(() -> {
                String result = EchoClient.sendAndReceive(port, msg);
                return result.equals(msg);
            });
            futures[i] = task;

            new Thread(task).start();
        }

        for (Future<Boolean> f : futures) {
            Assert.assertTrue(f.get());
        }
    }
 

@Override
@NotNull
public FutureTask<Boolean> preprocessFile(@NotNull PsiFile file, boolean processChangedTextOnly) throws IncorrectOperationException {
    final FutureTask<Boolean> reformatTask = myReformatCodeProcessor.preprocessFile(file, processChangedTextOnly);
    final FutureTask<Boolean> optimizeImportsTask = myOptimizeImportsProcessor.preprocessFile(file, false);
    return new FutureTask<Boolean>(new Callable<Boolean>() {
        @Override
        public Boolean call() throws Exception {
            reformatTask.run();
            if (!reformatTask.get() || reformatTask.isCancelled()) {
                return false;
            }

            CodeStyleManagerImpl.setSequentialProcessingAllowed(false);
            try {
                optimizeImportsTask.run();
                return optimizeImportsTask.get() && !optimizeImportsTask.isCancelled();
            }
            finally {
                CodeStyleManagerImpl.setSequentialProcessingAllowed(true);
            }
        }
    });
}
 

/**
 * Warmup the indicated namespaces.
 * 
 * @param namespaces
 *           A list of zero or more namespaces to be warmed up (optional).
 *           When <code>null</code> or empty, all namespaces will be warmed
 *           up.
 * 
 * @return A future for the task that is warming up the indices associated
 *         with those namespace(s). The future evaluates to a map from the
 *         name of the index to the statistics collected for that index
 *         during the warmup procedure.
 * 
 * @see <a href="http://trac.bigdata.com/ticket/1050" > pre-heat the journal
 *      on startup </a>
 * 
 * @see WarmUpTask
 */
public Future<Map<String, BaseIndexStats>> warmUp(
      final List<String> namespaces) {

   /*
    * The indices will be scanned with one thread per index. This parameter
    * determines the #of such scans that will execute in parallel. Since the
    * thread will block on any IO, you need a modestly large number of
    * threads here to enqueue enough disk reads to drive enough IOPs for an
    * efficient disk scan.
    */
   final int nparallel = 20;
   
   final FutureTask<Map<String, BaseIndexStats>> ft = new FutureTask<Map<String, BaseIndexStats>>(
         new WarmUpTask(this, namespaces, ITx.READ_COMMITTED/* timestamp */,
               nparallel, false/* visitLeaves */));

   getExecutorService().submit(ft);

   return ft;

}
 

private void executeFoiTasks(Map<String, FutureTask<OperationResult>> getFoiAccessTasks, SOSMetadata metadata) throws InterruptedException,
        ExecutionException,
        XmlException,
        IOException,
        OXFException {
    int counter;
    counter = getFoiAccessTasks.size();
    LOGGER.debug("Sending {} GetFeatureOfInterest requests", counter);
    for (String procedureID : getFoiAccessTasks.keySet()) {
        LOGGER.debug("Sending #{} GetFeatureOfInterest request for procedure '{}'", counter--, procedureID);
        FutureTask<OperationResult> futureTask = getFoiAccessTasks.get(procedureID);
        AccessorThreadPool.execute(futureTask);
        try {
            OperationResult opRes = futureTask.get(metadata.getTimeout(), MILLISECONDS);
            GetFeatureOfInterestParser getFoiParser = new GetFeatureOfInterestParser(opRes, metadata);
            getFoiParser.createFeatures();
        }
        catch (TimeoutException e) {
            LOGGER.error("Timeout occured.", e);
        }
    }
}
 

/**
 * Try to discover what is hidden under a FutureTask (hack)
 */
public static Object extractUnderlyingCallable(FutureTask<?> futureTask) {
    try {
        Field syncField = FutureTask.class.getDeclaredField("sync");
        syncField.setAccessible(true);
        Object sync = syncField.get(futureTask);
        Field callableField = sync.getClass().getDeclaredField("callable");
        callableField.setAccessible(true);
        Object callable = callableField.get(sync);
        if (callable.getClass().getSimpleName().equals("RunnableAdapter")) {
            Field taskField = callable.getClass().getDeclaredField("task");
            taskField.setAccessible(true);
            return taskField.get(callable);
        }
        return callable;
    } catch (Exception e) {
        throw new RuntimeException(e);
    }
}
 

@Test
public void runFuture() {
    for (int i = 0; i < 500; i++) {
        CompositeDisposable set = new CompositeDisposable();
        final ScheduledRunnable run = new ScheduledRunnable(Functions.EMPTY_RUNNABLE, set);
        set.add(run);

        final FutureTask<Void> ft = new FutureTask<Void>(Functions.EMPTY_RUNNABLE, null);

        Runnable r1 = new Runnable() {
            @Override
            public void run() {
                run.call();
            }
        };

        Runnable r2 = new Runnable() {
            @Override
            public void run() {
                run.setFuture(ft);
            }
        };

        TestCommonHelper.race(r1, r2);
    }
}
 

/**
 * Constructs this {@code SwingWorker}.
 */
public SwingWorker() {
    Callable<T> callable =
            new Callable<T>() {
                public T call() throws Exception {
                    setState(StateValue.STARTED);
                    return doInBackground();
                }
            };

    future = new FutureTask<T>(callable) {
                   @Override
                   protected void done() {
                       doneEDT();
                       setState(StateValue.DONE);
                   }
               };

   state = StateValue.PENDING;
   propertyChangeSupport = new SwingWorkerPropertyChangeSupport(this);
   doProcess = null;
   doNotifyProgressChange = null;
}
 

private boolean checkThreadCompletion(final List<FutureTask> taskList)
{
    try
    {
        for (FutureTask futureTask : taskList)
        {
            futureTask.get();
        }
    }
    catch (Exception e)
    {
        ISF_LOGGER.error("task execution error: {}", e.toString());
        e.printStackTrace();
        return false;
    }

    return true;
}
 

private FutureTask<Void> getTask(final ClassFile cf) {
    FutureTask<Void> task = new FutureTask<Void>(new Callable<Void>() {
        public Void call() throws Exception {
            finder.parse(cf);
            return null;
        }
    });
    tasks.add(task);
    return task;
}
 

public Message write(final Message message, final Collection<Chunk> chunks) throws ArangoDBException {
    final FutureTask<Message> task = new FutureTask<>(() -> messageStore.get(message.getId()));
    messageStore.storeMessage(message.getId(), task);
    super.writeIntern(message, chunks);
    try {
        return timeout == null || timeout == 0L ? task.get() : task.get(timeout, TimeUnit.MILLISECONDS);
    } catch (final Exception e) {
        throw new ArangoDBException(e);
    }
}
 

@Override
public OperatorStateBackend createOperatorStateBackend(
	Environment env,
	String operatorIdentifier,
	@Nonnull Collection<OperatorStateHandle> stateHandles,
	CloseableRegistry cancelStreamRegistry) throws Exception {
	return new DefaultOperatorStateBackendBuilder(
		env.getUserClassLoader(),
		env.getExecutionConfig(),
		true,
		stateHandles,
		cancelStreamRegistry) {
		@Override
		@SuppressWarnings("unchecked")
		public DefaultOperatorStateBackend build() {
			return new DefaultOperatorStateBackend(
				executionConfig,
				cancelStreamRegistry,
				new HashMap<>(),
				new HashMap<>(),
				new HashMap<>(),
				new HashMap<>(),
				mock(AbstractSnapshotStrategy.class)
			) {
				@Nonnull
				@Override
				public RunnableFuture<SnapshotResult<OperatorStateHandle>> snapshot(
					long checkpointId,
					long timestamp,
					@Nonnull CheckpointStreamFactory streamFactory,
					@Nonnull CheckpointOptions checkpointOptions) throws Exception {

					return new FutureTask<>(() -> {
						throw new Exception("Async part snapshot exception.");
					});
				}
			};
		}
	}.build();
}
 

public void check() throws Exception {
    final FutureTask<Exception> futureTask = new FutureTask<>(this);
    executor.submit(futureTask);
    Exception x = futureTask.get();
    if ( x != null) {
        throw new RuntimeException("Check failed: "+x,x);
    }
}
 

@Test
public void testAbsolutePathOneAndTwo() throws Exception {

    final String requestURI = "http://localhost:" + PORT + "/one/bookstore/request?delay";

    Callable<String> callable = new Callable<String>() {
        public String call() {
            WebClient wc = WebClient.create(requestURI);
            return wc.accept("text/plain").get(String.class);

        }
    };
    FutureTask<String> task = new FutureTask<>(callable);
    ExecutorService executor = Executors.newFixedThreadPool(1);
    executor.execute(task);
    Thread.sleep(1000);

    Runnable runnable = new Runnable() {
        public void run() {
            try {
                testAbsolutePathTwo();
            } catch (Exception ex) {
                throw new RuntimeException("Concurrent testAbsolutePathTwo failed");
            }
        }
    };
    new Thread(runnable).start();
    Thread.sleep(2000);

    String path = task.get();
    assertEquals("Absolute RequestURI is wrong", requestURI, path);


}
 

private List<FutureTask<Boolean>> processOperationsInFuture(int count) {
    List<FutureTask<Boolean>> futureTaskList = new ArrayList<FutureTask<Boolean>>(count);
    this.opCounts = new CopyOnWriteArrayList<Pair<String, Integer>>();

    for (int i = 0; i < count; i++) {
        Callable<Boolean> callable = new MongoCompositeTest(i, size, chunkSize, da, dataRecord, this.opCounts, this.operationsEnabled, this.profiledCollectionName);
        FutureTask<Boolean> futureTask = MongoExecutor.execute(callable);
        futureTaskList.add(futureTask);
    }

    return futureTaskList;
}
 

@NbBundle.Messages({"LBL_ResolveFXJDK=Choose FX-enabled Java Platform - \"{0}\" Project"})
@Override
public Future<Result> resolve() {
    final ChooseOtherPlatformPanel choosePlatform = new ChooseOtherPlatformPanel(type);
    final DialogDescriptor dd = new DialogDescriptor(choosePlatform, Bundle.LBL_ResolveFXJDK(ProjectUtils.getInformation(project).getDisplayName()));
    if (DialogDisplayer.getDefault().notify(dd) == DialogDescriptor.OK_OPTION) {
        final Callable<ProjectProblemsProvider.Result> resultFnc =
                new Callable<Result>() {
            @Override
            public Result call() throws Exception {
                final JavaPlatform jp = choosePlatform.getSelectedPlatform();
                if(jp != null) {
                    try {
                        ProjectManager.mutex().writeAccess(new Mutex.ExceptionAction<Void>() {
                            @Override
                            public Void run() throws IOException {
                                platformSetter.setProjectPlatform(jp);
                                JFXProjectUtils.updateClassPathExtension(project);
                                return null;
                            }
                        });
                    } catch (MutexException e) {
                        throw (IOException) e.getCause();
                    }
                    LOGGER.info("Set " + PLATFORM_ACTIVE + " to platform " + jp);
                    return ProjectProblemsProvider.Result.create(ProjectProblemsProvider.Status.RESOLVED);
                }
                return ProjectProblemsProvider.Result.create(ProjectProblemsProvider.Status.UNRESOLVED);
            }
        };
        final RunnableFuture<Result> result = new FutureTask<Result>(resultFnc);
        RP.post(result);
        return result;
    }
    return new JFXProjectProblems.Done(
            Result.create(ProjectProblemsProvider.Status.UNRESOLVED));
}
 

/**
 * Creates a new asynchronous task. This constructor must be invoked on the UI thread.
 */
public AsyncTask() {
    mWorker = new WorkerRunnable<Params, Result>() {
        public Result call() throws Exception {
            mTaskInvoked.set(true);

            Process.setThreadPriority(Process.THREAD_PRIORITY_BACKGROUND);
            //noinspection unchecked
            return postResult(doInBackground(mParams));
        }
    };

    mFuture = new FutureTask<Result>(mWorker) {
        @Override
        protected void done() {
            try {
                postResultIfNotInvoked(get());
            } catch (InterruptedException e) {
                android.util.Log.w(LOG_TAG, e);
            } catch (ExecutionException e) {
                throw new RuntimeException("An error occured while executing doInBackground()",
                        e.getCause());
            } catch (CancellationException e) {
                postResultIfNotInvoked(null);
            }
        }
    };
}
 

protected void reportStats(ContainerStats.OperatorStats stats, long windowId)
{
  stats.outputPorts = new ArrayList<>();
  for (Entry<String, Sink<Object>> e : outputs.entrySet()) {
    ContainerStats.OperatorStats.PortStats portStats = new ContainerStats.OperatorStats.PortStats(e.getKey());
    portStats.tupleCount = e.getValue().getCount(true) - controlTupleCount;
    portStats.endWindowTimestamp = endWindowEmitTime;
    stats.outputPorts.add(portStats);
  }
  controlTupleCount = 0;

  long currentCpuTime = tmb.getCurrentThreadCpuTime();
  stats.cpuTimeUsed = currentCpuTime - lastSampleCpuTime;
  lastSampleCpuTime = currentCpuTime;

  if (checkpoint != null) {
    stats.checkpoint = checkpoint;
    stats.checkpointStats = checkpointStats;
    checkpointStats = null;
    checkpoint = null;
  } else {
    Pair<FutureTask<Stats.CheckpointStats>, CheckpointWindowInfo> pair = taskQueue.peek();
    if (pair != null && pair.getFirst().isDone()) {
      taskQueue.poll();
      try {
        CheckpointWindowInfo checkpointWindowInfo = pair.getSecond();
        stats.checkpointStats = pair.getFirst().get();
        stats.checkpoint = new Checkpoint(checkpointWindowInfo.windowId, checkpointWindowInfo.applicationWindowCount,
            checkpointWindowInfo.checkpointWindowCount);
        if (operator instanceof Operator.CheckpointListener) {
          ((Operator.CheckpointListener)operator).checkpointed(checkpointWindowInfo.windowId);
        }
      } catch (Exception ex) {
        throw Throwables.propagate(ex);
      }
    }
  }

  context.report(stats, windowId);
}
 

/**
 * Creates a new asynchronous task. This constructor must be invoked on the UI thread.
 */
public AsyncTask() {
    mWorker = new WorkerRunnable<Params, Result>() {
        public Result call() throws Exception {
            mTaskInvoked.set(true);

            Process.setThreadPriority(Process.THREAD_PRIORITY_BACKGROUND);
            //noinspection unchecked
            return postResult(doInBackground(mParams));
        }
    };

    mFuture = new FutureTask<Result>(mWorker) {
        @Override
        protected void done() {
            try {
                postResultIfNotInvoked(get());
            } catch (InterruptedException e) {
                android.util.Log.w(LOG_TAG, e);
            } catch (ExecutionException e) {
                throw new RuntimeException("An error occured while executing doInBackground()",
                        e.getCause());
            } catch (CancellationException e) {
                postResultIfNotInvoked(null);
            }
        }
    };
}
 

/**
 * Submits a value-returning task for execution on the EDT and
 * returns a Future representing the pending results of the task.
 *
 * @param task the task to submit
 * @return a Future representing pending completion of the task
 * @throws NullPointerException if the task is null
 */
public static <V> Future<V> submit(Callable<V> task) {
    if (task == null) {
        throw new NullPointerException();
    }
    FutureTask<V> future = new FutureTask<V>(task);
    execute(future);
    return future;
}
 

/**
 * Creates a new asynchronous task. This constructor must be invoked on the UI thread.
 */
public AsyncTask() {
    mWorker = new WorkerRunnable<Params, Result>() {
        public Result call() throws Exception {
            mTaskInvoked.set(true);

            android.os.Process.setThreadPriority(Process.THREAD_PRIORITY_BACKGROUND);
            //noinspection unchecked
            return postResult(doInBackground(mParams));
        }
    };

    mFuture = new FutureTask<Result>(mWorker) {
        @Override
        protected void done() {
            try {
                postResultIfNotInvoked(get());
            } catch (InterruptedException e) {
                android.util.Log.w(LOG_TAG, e);
            } catch (ExecutionException e) {
                throw new RuntimeException("An error occured while executing doInBackground()",
                        e.getCause());
            } catch (CancellationException e) {
                postResultIfNotInvoked(null);
            }
        }
    };
}
 

@Override
protected Future<Channel<byte[]>> connectByProtocol(SocketAddress remoteAddress, SocketAddress localAddress) throws IOException {
	SocketChannel sc = null;
	boolean success = false;
	try {
           sc = newSocketChannel(localAddress);
           if (sc.connect(remoteAddress)) {
               // return true immediately, as established a local connection,
           	Future<Channel<byte[]>> future = executorService.submit(new ConnectionCall(sc));
           	success = true;
           	LOG.debug("[CRAFT-ATOM-NIO] Established local connection");
               return future;
           }
           success = true;
       } finally {
           if (!success && sc != null) {
               try {
                   close(sc);
               } catch (IOException e) {
               	LOG.warn("[CRAFT-ATOM-NIO] Close exception", e);
               }
           }
       }
       
       ConnectionCall cc = new ConnectionCall(sc);
       FutureTask<Channel<byte[]>> futureTask = new FutureTask<Channel<byte[]>>(cc);
       cc.setFutureTask(futureTask);
       connectQueue.add(cc);
       
       startup();
       selector.wakeup();
	return futureTask;
}