public NonBlockingIdentityHashMap<Long, TestKey> getMapMultithreaded()
        throws InterruptedException, ExecutionException {
      final int threadCount = _items.keySet().size();
      final NonBlockingIdentityHashMap<Long, TestKey> map =
          new NonBlockingIdentityHashMap<Long, TestKey>();

      // use a barrier to open the gate for all threads at once to avoid rolling start and no actual
      // concurrency
      final CyclicBarrier barrier = new CyclicBarrier(threadCount);
      final ExecutorService ex = Executors.newFixedThreadPool(threadCount);
      final CompletionService<Integer> co = new ExecutorCompletionService<Integer>(ex);
      for (Integer type : _items.keySet()) {
        // A linked-list of things to insert
        List<TestKey> items = _items.get(type);
        TestKeyFeederThread feeder = new TestKeyFeederThread(type, items, map, barrier);
        co.submit(feeder);
      }

      // wait for all threads to return
      int itemCount = 0;
      for (int retCount = 0; retCount < threadCount; retCount++) {
        final Future<Integer> result = co.take();
        itemCount += result.get();
      }
      ex.shutdown();
      return map;
    }
  public static void shutdown() {
    logger_.info("Shutting down ...");
    synchronized (MessagingService.class) {
      /* Stop listening on any socket */
      for (SelectionKey skey : listenSockets_.values()) {
        SelectorManager.getSelectorManager().cancel(skey);
      }
      listenSockets_.clear();

      /* Shutdown the threads in the EventQueue's */
      messageDeserializationExecutor_.shutdownNow();
      messageSerializerExecutor_.shutdownNow();
      messageDeserializerExecutor_.shutdownNow();
      streamExecutor_.shutdownNow();

      /* shut down the cachetables */
      taskCompletionMap_.shutdown();
      callbackMap_.shutdown();

      /* Interrupt the selector manager thread */
      SelectorManager.getSelectorManager().interrupt();

      poolTable_.clear();
      verbHandlers_.clear();
      bShutdown_ = true;
    }
    logger_.debug("Shutdown invocation complete.");
  }
  @Override
  public Boolean call() throws Exception {

    long timeoutMillis = 5000;

    try {
      getServersFile();
      getZkRunning();

      while (true) {
        while (!restartQueue.isEmpty()) {
          LOG.debug("Restart queue size [" + restartQueue.size() + "]");
          RestartHandler handler = restartQueue.poll();
          Future<ScriptContext> runner = pool.submit(handler);
          ScriptContext scriptContext = runner.get(); // blocking call
          if (scriptContext.getExitCode() != 0) restartQueue.add(handler);
        }

        try {
          Thread.sleep(timeoutMillis);
        } catch (InterruptedException e) {
        }
      }

    } catch (Exception e) {
      e.printStackTrace();
      LOG.error(e);
      pool.shutdown();
      throw e;
    }
  }
 /** Run a basic task */
 @Test
 public void testBasicTask() throws Exception {
   Callable<String> task = new BasicTestTask();
   ExecutorService executor = createSingleNodeExecutorService("testBasicTask");
   Future future = executor.submit(task);
   assertEquals(future.get(), BasicTestTask.RESULT);
 }
  // Concurrent insertion & then iterator test.
  public static void testNonBlockingIdentityHashMapIterator() throws InterruptedException {
    final int ITEM_COUNT1 = 1000;
    final int THREAD_COUNT = 5;
    final int PER_CNT = ITEM_COUNT1 / THREAD_COUNT;
    final int ITEM_COUNT = PER_CNT * THREAD_COUNT; // fix roundoff for odd thread counts

    NonBlockingIdentityHashMap<Long, TestKey> nbhml =
        new NonBlockingIdentityHashMap<Long, TestKey>();
    // use a barrier to open the gate for all threads at once to avoid rolling
    // start and no actual concurrency
    final CyclicBarrier barrier = new CyclicBarrier(THREAD_COUNT);
    final ExecutorService ex = Executors.newFixedThreadPool(THREAD_COUNT);
    final CompletionService<Object> co = new ExecutorCompletionService<Object>(ex);
    for (int i = 0; i < THREAD_COUNT; i++) {
      co.submit(new NBHMLFeeder(nbhml, PER_CNT, barrier, i * PER_CNT));
    }
    for (int retCount = 0; retCount < THREAD_COUNT; retCount++) {
      co.take();
    }
    ex.shutdown();

    assertEquals("values().size()", ITEM_COUNT, nbhml.values().size());
    assertEquals("entrySet().size()", ITEM_COUNT, nbhml.entrySet().size());
    int itemCount = 0;
    for (TestKey K : nbhml.values()) itemCount++;
    assertEquals("values().iterator() count", ITEM_COUNT, itemCount);
  }
  public static void main(String[] args) throws Exception {
    ExecutorService exec = Executors.newCachedThreadPool();
    for (int i = 0; i < 5; i++) exec.execute(new Task());
    exec.execute(new Task2());
    Timer timer = new Timer();
    timer.scheduleAtFixedRate(
        new TimerTask() {
          boolean prod = true;

          public void run() {
            if (prod) {
              System.out.print("\nnotify() ");
              Task.blocker.prod();
              prod = false;
            } else {
              System.out.print("\nnotifyAll() ");
              Task.blocker.prodAll();
              prod = true;
            }
          }
        },
        400,
        400); // Run every .4 second
    TimeUnit.SECONDS.sleep(5); // Run for a while...
    timer.cancel();
    System.out.println("\nTimer canceled");
    TimeUnit.MILLISECONDS.sleep(500);
    System.out.print("Task2.blocker.prodAll() ");
    Task2.blocker.prodAll();
    TimeUnit.MILLISECONDS.sleep(500);
    System.out.println("\nShutting down");
    exec.shutdownNow(); // Interrupt all tasks
  }
 /** Execute a task that is executing something else inside. Nested Execution. */
 @Test(timeout = 10000)
 public void testNestedExecution() throws Exception {
   Callable<String> task = new NestedExecutorTask();
   ExecutorService executor = createSingleNodeExecutorService("testNestedExecution");
   Future future = executor.submit(task);
   future.get();
 }
Beispiel #8
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  public static <T> List<T> executeAndGetResult(
      Collection<? extends Callable<T>> tasks, long waitingTimeInMillis) {
    ExecutorService executor = Executors.newFixedThreadPool(tasks.size());
    List<T> finalResults = new ArrayList<T>(tasks.size());
    List<Future<T>> temporaryResults = new ArrayList<Future<T>>(tasks.size());

    try {
      for (Callable<T> task : tasks) {
        Future<T> future = executor.submit(task);
        temporaryResults.add(future);
      }
      executor.awaitTermination(waitingTimeInMillis, TimeUnit.MILLISECONDS);
    } catch (InterruptedException e) {
      throw new RuntimeException(e);
    } finally {
      executor.shutdown();
    }

    finalResults = new ArrayList<T>(temporaryResults.size());

    for (Future<T> result : temporaryResults) {
      try {
        finalResults.add(result.get());
      } catch (InterruptedException e) {
        throw new RuntimeException(e);
      } catch (ExecutionException e) {
        throw new RuntimeException(e);
      }
    }

    return finalResults;
  }
 @Test
 public void testInvokeAllTimeoutCancelled() throws Exception {
   ExecutorService executor = createSingleNodeExecutorService("testInvokeAll");
   assertFalse(executor.isShutdown());
   // Only one task
   ArrayList<Callable<Boolean>> tasks = new ArrayList<Callable<Boolean>>();
   tasks.add(new CancellationAwareTask(0));
   List<Future<Boolean>> futures = executor.invokeAll(tasks, 5, TimeUnit.SECONDS);
   assertEquals(futures.size(), 1);
   assertEquals(futures.get(0).get(), Boolean.TRUE);
   // More tasks
   tasks.clear();
   for (int i = 0; i < COUNT; i++) {
     tasks.add(new CancellationAwareTask(i < 2 ? 0 : 20000));
   }
   futures = executor.invokeAll(tasks, 5, TimeUnit.SECONDS);
   assertEquals(futures.size(), COUNT);
   for (int i = 0; i < COUNT; i++) {
     if (i < 2) {
       assertEquals(futures.get(i).get(), Boolean.TRUE);
     } else {
       boolean excepted = false;
       try {
         futures.get(i).get();
       } catch (CancellationException e) {
         excepted = true;
       }
       assertTrue(excepted);
     }
   }
 }
  public static void main(String[] args) {
    ExecutorService pool = Executors.newFixedThreadPool(2);

    final Vector[] vecs = {
      new Vector(), new Vector(),
    };
    vecs[0].add(vecs[1]);
    vecs[1].add(vecs[0]);

    for (int i = 0; i < 2; i++) {
      final int threadNumber = i;
      pool.submit(
          new Callable() {
            public Object call() throws Exception {
              for (int i = 0; i < 1000 * 1000; i++) {
                ObjectOutputStream out = new ObjectOutputStream(new NullOutputStream());
                out.writeObject(vecs[threadNumber]);
                out.close();
              }
              System.out.println("done");
              return null;
            }
          });
    }
  }
  private int[] computeClusterNumberRange(int min, int max, int hop, Optimizer optimizer)
      throws ExecutionException, InterruptedException {
    ExecutorService executor;
    if (parallelWorkers > 1) {
      executor = Executors.newFixedThreadPool(2);
    } else {
      executor = Executors.newFixedThreadPool(1);
    }
    ConcurrentMap<Integer, Double> sharedScores = new ConcurrentHashMap<>();
    SearchSpaceBoundaryFinder_old upperBoundFinder =
        new SearchSpaceUpperBoundaryFinder_old(min, max, hop, optimizer, sharedScores);
    Future<Integer> futureUpperBound = executor.submit(upperBoundFinder);
    SearchSpaceBoundaryFinder_old lowerBoundFinder =
        new SearchSpaceLowerBoundaryFinder_old(min, max, hop, optimizer, sharedScores);
    Future<Integer> futureLowerBound = executor.submit(lowerBoundFinder);
    executor.shutdown();
    int[] r = new int[2];
    Integer realMin = futureLowerBound.get();
    Integer realMax = futureUpperBound.get();
    r[0] = realMin == null ? -1 : realMin;
    r[1] = realMax == null ? -1 : realMax;

    scores.putAll(lowerBoundFinder.getSplitsAndScores());
    // scores.putAll(upperBoundFinder.getSplitsAndScores());
    return r;
  }
 public <T> Collection<T> getParallelResults(List<Node<T>> nodes) throws InterruptedException {
   ExecutorService exec = Executors.newCachedThreadPool();
   Queue<T> resultQueue = new ConcurrentLinkedQueue<T>();
   parallelRecursive(exec, nodes, resultQueue);
   exec.shutdown();
   exec.awaitTermination(Long.MAX_VALUE, TimeUnit.SECONDS);
   return resultQueue;
 }
 public static void main(String[] args) throws Exception {
   ExecutorService exec = Executors.newCachedThreadPool();
   for (int i = 0; i < N_ELEMENTS; i++)
     for (int j = 0; j < N_GENES; j++) GRID[i][j] = new AtomicInteger(rand.nextInt(1000));
   for (int i = 0; i < N_EVOLVERS; i++) exec.execute(new Evolver());
   TimeUnit.SECONDS.sleep(5);
   exec.shutdownNow();
 }
  @Test
  public void testPostregisteredExecutionCallbackCompletableFuture() throws Exception {
    HazelcastInstanceProxy proxy = (HazelcastInstanceProxy) createHazelcastInstance();
    Field originalField = HazelcastInstanceProxy.class.getDeclaredField("original");
    originalField.setAccessible(true);
    HazelcastInstanceImpl hz = (HazelcastInstanceImpl) originalField.get(proxy);
    NodeEngine nodeEngine = hz.node.nodeEngine;
    ExecutionService es = nodeEngine.getExecutionService();

    final CountDownLatch latch1 = new CountDownLatch(1);
    final CountDownLatch latch2 = new CountDownLatch(1);
    final ExecutorService executorService = Executors.newSingleThreadExecutor();
    try {
      Future future =
          executorService.submit(
              new Callable<String>() {
                @Override
                public String call() {
                  try {
                    return "success";
                  } finally {
                    latch1.countDown();
                  }
                }
              });

      final ICompletableFuture completableFuture = es.asCompletableFuture(future);
      latch1.await(30, TimeUnit.SECONDS);

      final AtomicReference reference = new AtomicReference();
      completableFuture.andThen(
          new ExecutionCallback() {
            @Override
            public void onResponse(Object response) {
              reference.set(response);
              latch2.countDown();
            }

            @Override
            public void onFailure(Throwable t) {
              reference.set(t);
              latch2.countDown();
            }
          });

      latch2.await(30, TimeUnit.SECONDS);
      if (reference.get() instanceof Throwable) {
        ((Throwable) reference.get()).printStackTrace();
      }

      assertEquals("success", reference.get());

    } finally {
      executorService.shutdown();
    }
  }
Beispiel #15
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 public static void main(String[] args) {
   Random rand = new Random(47);
   ExecutorService exec = Executors.newCachedThreadPool();
   DelayQueue<DelayedTask> queue = new DelayQueue<DelayedTask>();
   // Fill with tasks that have random delays:
   for (int i = 0; i < 20; i++) queue.put(new DelayedTask(rand.nextInt(5000)));
   // Set the stopping point
   queue.add(new DelayedTask.EndSentinel(5000, exec));
   exec.execute(new DelayedTaskConsumer(queue));
 }
  private void executeConcurrentRandomReadAndWriteOperations()
      throws InterruptedException, ExecutionException {
    for (int i = 0; i < THREAD_COUNT; i++) {
      futures.add(executorService.submit(new Writer()));
    }
    for (int i = 0; i < THREAD_COUNT; i++) {
      futures.add(executorService.submit(new Reader()));
    }

    for (Future<Void> future : futures) future.get();
  }
 public static void main(String[] args) throws Exception {
   if (args.length > 0) size = new Integer(args[0]);
   if (args.length > 1) delay = new Integer(args[1]);
   ExecutorService exec = Executors.newCachedThreadPool();
   Exchanger<List<Fat>> xc = new Exchanger<List<Fat>>();
   List<Fat> producerList = new CopyOnWriteArrayList<Fat>(),
       consumerList = new CopyOnWriteArrayList<Fat>();
   exec.execute(new ExchangerProducer<Fat>(xc, BasicGenerator.create(Fat.class), producerList));
   exec.execute(new ExchangerConsumer<Fat>(xc, consumerList));
   TimeUnit.SECONDS.sleep(delay);
   exec.shutdownNow();
 }
 public static void main(String[] args) throws Exception {
   ExecutorService exec = Executors.newCachedThreadPool();
   Restaurant restaurant = new Restaurant(exec, 5, 2);
   exec.execute(restaurant);
   if (args.length > 0) // Optional argument
   TimeUnit.SECONDS.sleep(new Integer(args[0]));
   else {
     print("Press ‘Enter’ to quit");
     System.in.read();
   }
   exec.shutdownNow();
 }
Beispiel #19
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 private synchronized void shutdown() {
   if (!exe.isShutdown()) {
     freeCUObjectsMemory();
   }
   exe.shutdown();
   try {
     System.err.println(
         "cuda device " + Id + " freed ? " + exe.awaitTermination(10, TimeUnit.SECONDS));
   } catch (InterruptedException e) {
     e.printStackTrace();
   }
 }
 public Restaurant(ExecutorService e, int nWaitPersons, int nChefs) {
   exec = e;
   for (int i = 0; i < nWaitPersons; i++) {
     WaitPerson waitPerson = new WaitPerson(this);
     waitPersons.add(waitPerson);
     exec.execute(waitPerson);
   }
   for (int i = 0; i < nChefs; i++) {
     Chef chef = new Chef(this);
     chefs.add(chef);
     exec.execute(chef);
   }
 }
 /** Test for the issue 129. Repeatedly runs tasks and check for isDone() status after get(). */
 @Test
 public void testIsDoneMethod2() throws Exception {
   ExecutorService executor = createSingleNodeExecutorService("isDoneMethod2");
   for (int i = 0; i < COUNT; i++) {
     Callable<String> task1 = new BasicTestTask();
     Callable<String> task2 = new BasicTestTask();
     Future future1 = executor.submit(task1);
     Future future2 = executor.submit(task2);
     assertEquals(future2.get(), BasicTestTask.RESULT);
     assertTrue(future2.isDone());
     assertEquals(future1.get(), BasicTestTask.RESULT);
     assertTrue(future1.isDone());
   }
 }
Beispiel #22
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 public static boolean init() {
   synchronized (cudaEngines) {
     System.err.println("---------Initializing Cuda----------------");
     try {
       extractAndLoadNativeLibs();
       JCudaDriver.setExceptionsEnabled(true);
       JCudaDriver.cuInit(0);
       compileKernelsPtx();
       // Obtain the number of devices
       int deviceCountArray[] = {0};
       JCudaDriver.cuDeviceGetCount(deviceCountArray);
       availableDevicesNb = deviceCountArray[0];
       if (availableDevicesNb == 0) return false;
       availableDevicesNb = NB_OF_DEVICE_TO_USE; // TODO
       initialization = Executors.newCachedThreadPool();
       System.out.println("Found " + availableDevicesNb + " GPU devices");
       for (int i = 0 /*-NB_OF_DEVICE_TO_USE*/; i < availableDevicesNb; i++) {
         final int index = i;
         Future<?> initJob =
             initialization.submit(
                 new Runnable() {
                   public void run() {
                     System.err.println("Initializing device n°" + index);
                     cudaEngines.put(index, new CudaEngine(index));
                   }
                 });
         initJob.get();
         initialization.shutdown();
       }
     } catch (InterruptedException
         | ExecutionException
         | IOException
         | CudaException
         | UnsatisfiedLinkError e) {
       e.printStackTrace();
       System.err.println("---------Cannot initialize Cuda !!! ----------------");
       return false;
     }
     Runtime.getRuntime()
         .addShutdownHook(
             new Thread() {
               @Override
               public void run() {
                 CudaEngine.stop();
               }
             });
     System.out.println("---------Cuda Initialized----------------");
     return true;
   }
 }
  /** Shutting down the cluster should act as the ExecutorService shutdown */
  @Test(expected = RejectedExecutionException.class)
  public void testClusterShutdown() throws Exception {
    ExecutorService executor = createSingleNodeExecutorService("testClusterShutdown");
    shutdownNodeFactory();
    Thread.sleep(2000);

    assertNotNull(executor);
    assertTrue(executor.isShutdown());
    assertTrue(executor.isTerminated());

    // New tasks must be rejected
    Callable<String> task = new BasicTestTask();
    executor.submit(task);
  }
Beispiel #24
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 @Override
 public Board solve(Board in) {
   if (useBacktracking) {
     return solve_mdfs(in);
   } else {
     if (nThreads == 1) {
       return solve_ldfs(in);
     } else {
       ExecutorService pool = Executors.newFixedThreadPool(nThreads);
       Board ret = solve_pndfs(in, pool);
       pool.shutdown();
       return ret;
     }
   }
 }
 public static void main(String[] args) throws Exception {
   ExecutorService exec = Executors.newCachedThreadPool();
   // If line is too long, customers will leave:
   CustomerLine customers = new CustomerLine(MAX_LINE_SIZE);
   exec.execute(new CustomerGenerator(customers));
   // Manager will add and remove tellers as necessary:
   exec.execute(new TellerManager(exec, customers, ADJUSTMENT_PERIOD));
   if (args.length > 0) // Optional argument
   TimeUnit.SECONDS.sleep(new Integer(args[0]));
   else {
     System.out.println("Press ‘Enter’ to quit");
     System.in.read();
   }
   exec.shutdownNow();
 }
Beispiel #26
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  public static void execute(Collection<? extends Runnable> tasks, long waitingTimeInMillis) {
    ExecutorService executor = Executors.newFixedThreadPool(tasks.size());

    for (Runnable task : tasks) {
      executor.execute(task);
    }

    try {
      executor.awaitTermination(waitingTimeInMillis, TimeUnit.MILLISECONDS);
    } catch (InterruptedException e) {
      throw new RuntimeException(e);
    } finally {
      executor.shutdown();
    }
  }
  /** {@inheritDoc} */
  @Override
  public void loadCache(GridBiInClosure<K, V> c, @Nullable Object... args) throws GridException {
    ExecutorService exec =
        new ThreadPoolExecutor(
            threadsCnt,
            threadsCnt,
            0L,
            MILLISECONDS,
            new ArrayBlockingQueue<Runnable>(batchQueueSize),
            new BlockingRejectedExecutionHandler());

    Iterator<I> iter = inputIterator(args);

    Collection<I> buf = new ArrayList<>(batchSize);

    try {
      while (iter.hasNext()) {
        if (Thread.currentThread().isInterrupted()) {
          U.warn(log, "Working thread was interrupted while loading data.");

          break;
        }

        buf.add(iter.next());

        if (buf.size() == batchSize) {
          exec.submit(new Worker(c, buf, args));

          buf = new ArrayList<>(batchSize);
        }
      }

      if (!buf.isEmpty()) exec.submit(new Worker(c, buf, args));
    } catch (RejectedExecutionException ignored) {
      // Because of custom RejectedExecutionHandler.
      assert false : "RejectedExecutionException was thrown while it shouldn't.";
    } finally {
      exec.shutdown();

      try {
        exec.awaitTermination(Long.MAX_VALUE, MILLISECONDS);
      } catch (InterruptedException ignored) {
        U.warn(log, "Working thread was interrupted while waiting for put operations to complete.");

        Thread.currentThread().interrupt();
      }
    }
  }
Beispiel #28
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  /**
   * Somewhat multi-threaded depth-first search. Performs a DFS of the subtrees from the current
   * node in parallel.
   *
   * @param s The tile sequence
   * @param b The board to search
   * @param pool The thread pool in which to submit jobs to.
   * @return The board with the highest evaluation or null if no board can continue.
   */
  private Board solve_pdfs(Board b, ExecutorService pool) {
    List<Future<Board>> rets = new ArrayList<>(BOARD_WIDTH);
    Board best = null;
    int best_score = -1;

    for (Direction d : directions) {
      Board n = new Board(b);
      if (n.move(tileSequence, d)) {
        rets.add(pool.submit(new ParallelDFS(n)));
      }
    }

    for (Future<Board> ret : rets) {
      try {
        Board c = ret.get();
        if (c != null) {
          int score = evaluate(c);
          if (score > best_score) {
            best = c;
            best_score = score;
          }
        }
      } catch (InterruptedException | ExecutionException e) {
        System.err.println("Error: " + e.getMessage());
      }
    }

    return best;
  }
  /** {@inheritDoc} */
  @Override
  protected void maybeStartStream() throws IOException {
    // connector
    final StreamConnector connector = getStreamConnector();

    if (connector == null) return;

    synchronized (this) {
      if (started) return;

      threadPool.execute(
          new Runnable() {
            @Override
            public void run() {
              try {
                Sctp.init();

                runOnDtlsTransport(connector);
              } catch (IOException e) {
                logger.error(e, e);
              } finally {
                try {
                  Sctp.finish();
                } catch (IOException e) {
                  logger.error("Failed to shutdown SCTP stack", e);
                }
              }
            }
          });

      started = true;
    }
  }
 /**
  * Executes the specified runnable on the worker thread of the view. Execution is performed
  * sequentially in the same sequence as the runnables have been passed to this method.
  */
 @Override
 public void execute(Runnable worker) {
   if (executor == null) {
     executor = Executors.newSingleThreadExecutor();
   }
   executor.execute(worker);
 }