Java AtomicInteger.getAndIncrement方法代碼示例

import java.util.concurrent.atomic.AtomicInteger; //導入方法依賴的package包/類
@Test
public void testGetItemsIsCalledIncreasing() {
  final AtomicBoolean called = new AtomicBoolean(false);
  final AtomicInteger calledCount = new AtomicInteger();

  ListPreloaderAdapter preloaderAdapter = new ListPreloaderAdapter() {
    @Override
    public List<Object> getPreloadItems(int position) {
      called.set(true);
      final int count = calledCount.getAndIncrement();
      assertEquals(11 + count, position);
      return super.getPreloadItems(position);
    }
  };
  ListPreloader<Object> preloader = new ListPreloader<>(requestManager,
      preloaderAdapter, preloaderAdapter, 10);
  preloader.onScroll(null, 1, 10, 30);
  assertEquals(10, calledCount.get());
}
 

import java.util.concurrent.atomic.AtomicInteger; //導入方法依賴的package包/類
@Test
public void testGetItemsIsNeverCalledWithEndGreaterThanTotalItems() {
  final AtomicBoolean called = new AtomicBoolean(false);
  final AtomicInteger calledCount = new AtomicInteger();
  ListPreloaderAdapter preloaderAdapter = new ListPreloaderAdapter() {
    @Override
    public List<Object> getPreloadItems(int position) {
      called.set(true);
      final int count = calledCount.getAndIncrement();
      assertEquals(26 + count, position);
      return super.getPreloadItems(position);
    }
  };
  ListPreloader<Object> preloader = new ListPreloader<>(requestManager,
      preloaderAdapter, preloaderAdapter, 10);
  preloader.onScroll(null, 16, 10, 30);
  assertTrue(called.get());
}
 

import java.util.concurrent.atomic.AtomicInteger; //導入方法依賴的package包/類
@Test
public void testGetItemsIsCalledDecreasing() {
  final AtomicBoolean called = new AtomicBoolean(false);
  final AtomicInteger calledCount = new AtomicInteger();
  ListPreloaderAdapter preloaderAdapter = new ListPreloaderAdapter() {
    @NonNull
    @Override
    public List<Object> getPreloadItems(int position) {
      // Ignore the preload caused from us starting at the end
      if (position >= 40) {
        return Collections.emptyList();
      }
      final int count = calledCount.getAndIncrement();
      called.set(true);
      assertEquals(28 - count, position);
      return super.getPreloadItems(position);
    }
  };
  ListPreloader<Object> preloader = new ListPreloader<>(requestManager,
      preloaderAdapter, preloaderAdapter, 10);
  preloader.onScroll(null, 30, 10, 40);
  preloader.onScroll(null, 29, 10, 40);
  assertTrue(called.get());
}
 

import java.util.concurrent.atomic.AtomicInteger; //導入方法依賴的package包/類
@Test
public void testGetItemsIsNeverCalledWithEndGreaterThanTotalItems() {
  final AtomicBoolean called = new AtomicBoolean(false);
  final AtomicInteger calledCount = new AtomicInteger();
  ListPreloaderAdapter preloaderAdapter = new ListPreloaderAdapter() {
    @NonNull
    @Override
    public List<Object> getPreloadItems(int position) {
      called.set(true);
      final int count = calledCount.getAndIncrement();
      assertEquals(26 + count, position);
      return super.getPreloadItems(position);
    }
  };
  ListPreloader<Object> preloader = new ListPreloader<>(requestManager,
      preloaderAdapter, preloaderAdapter, 10);
  preloader.onScroll(null, 16, 10, 30);
  assertTrue(called.get());
}
 

import java.util.concurrent.atomic.AtomicInteger; //導入方法依賴的package包/類
@Test
public void normal() {
    final AtomicInteger count = new AtomicInteger();

    Cancellable c = new Cancellable() {
        @Override
        public void cancel() throws Exception {
            count.getAndIncrement();
        }
    };

    CancellableDisposable cd = new CancellableDisposable(c);

    assertFalse(cd.isDisposed());

    cd.dispose();
    cd.dispose();

    assertTrue(cd.isDisposed());

    assertEquals(1, count.get());
}
 

import java.util.concurrent.atomic.AtomicInteger; //導入方法依賴的package包/類
@Test
public void testDontPreloadItemsRepeatedlyWhileDecreasing() {
  final AtomicInteger called = new AtomicInteger();
  ListPreloaderAdapter preloaderAdapter = new ListPreloaderAdapter() {
    @NonNull
    @Override
    public List<Object> getPreloadItems(int position) {
      if (position >= 20) {
        return Collections.emptyList();
      }
      final int current = called.getAndIncrement();
      assertEquals(19 - current, position);
      return super.getPreloadItems(position);
    }
  };

  ListPreloader<Object> preloader = new ListPreloader<>(requestManager,
      preloaderAdapter, preloaderAdapter, 10);
  preloader.onScroll(null, 21, 10, 30);
  preloader.onScroll(null, 20, 10, 30);
  preloader.onScroll(null, 17, 10, 30);
  assertEquals(13, called.get());
}
 

import java.util.concurrent.atomic.AtomicInteger; //導入方法依賴的package包/類
@Override
protected FilterResult filter(AbstractTraceElement<? extends CatalogType> element) {
    FilterResult result = FilterResult.ALLOW;
    if (element instanceof TransactionTrace) {
        final boolean trace = LOG.isTraceEnabled();
        final String proc_name = element.getCatalogItemName();
        final AtomicInteger proc_counter = this.proc_counters.get(proc_name);
        
        if (proc_counter == null) {
            if (trace) LOG.trace("Procedure " + proc_name + " is not included in whitelist. Skipping...");
            result = FilterResult.SKIP;
        } else {
            int proc_idx = proc_counter.getAndIncrement();
            int proc_rate = this.proc_rates.get(proc_name);
            result = (proc_rate != 0 && proc_idx % proc_rate == 0 ? FilterResult.ALLOW : FilterResult.SKIP);
        }
    }
    return (result);
}
 

import java.util.concurrent.atomic.AtomicInteger; //導入方法依賴的package包/類
private static void withPool() throws Exception {
    GenericObjectPoolConfig poolConfig = new GenericObjectPoolConfig();
    // poolConfig.setMinIdle(0);
    // poolConfig.setMaxIdle(5);
    // poolConfig.setMaxTotal(5);
    final JedisPool pool = new JedisPool(poolConfig, "127.0.0.1", 6379, 2000, "weimob123", 0);
    List<Thread> tds = new ArrayList<Thread>();

    final AtomicInteger ind = new AtomicInteger();
    for (int i = 0; i < 50; i++) {
        Thread hj = new Thread(new Runnable() {
            public void run() {
                for (; ind.getAndIncrement() < TOTAL_OPERATIONS; ) {
                    try {
                        Jedis j = pool.getResource();
                        // final String key = "foo" + i;
                        // j.setRedisData(key, key);
                        // j.getRedisData(key);
                        j.get("foo1");
                        j.close();
                    } catch (Exception e) {
                        e.printStackTrace();
                    }
                }
            }
        });
        tds.add(hj);
        hj.start();
    }

    for (Thread t : tds)
        t.join();

    pool.destroy();

}
 

import java.util.concurrent.atomic.AtomicInteger; //導入方法依賴的package包/類
@SuppressWarnings("unchecked")
@Test
public void shouldRetryWhenTimeoutExceptionOccursOnSend() throws Exception {
    final AtomicInteger attempt = new AtomicInteger(0);
    final RecordCollectorImpl collector = new RecordCollectorImpl(
            new MockProducer(cluster, true, new DefaultPartitioner(), byteArraySerializer, byteArraySerializer) {
                @Override
                public synchronized Future<RecordMetadata> send(final ProducerRecord record, final Callback callback) {
                    if (attempt.getAndIncrement() == 0) {
                        throw new TimeoutException();
                    }
                    return super.send(record, callback);
                }
            },
            "test");

    collector.send("topic1", "3", "0", null, stringSerializer, stringSerializer, streamPartitioner);
    final Long offset = collector.offsets().get(new TopicPartition("topic1", 0));
    assertEquals(Long.valueOf(0L), offset);
}
 

import java.util.concurrent.atomic.AtomicInteger; //導入方法依賴的package包/類
@Test
public void newBoundaryCalledAfterWindowClosed() {
    final AtomicInteger calls = new AtomicInteger();
    PublishProcessor<Integer> source = PublishProcessor.create();
    final PublishProcessor<Integer> boundary = PublishProcessor.create();
    Callable<Flowable<Integer>> boundaryFunc = new Callable<Flowable<Integer>>() {
        @Override
        public Flowable<Integer> call() {
            calls.getAndIncrement();
            return boundary;
        }
    };

    TestSubscriber<Flowable<Integer>> ts = new TestSubscriber<Flowable<Integer>>();
    source.window(boundaryFunc).subscribe(ts);

    source.onNext(1);
    boundary.onNext(1);
    assertTrue(boundary.hasSubscribers());

    source.onNext(2);
    boundary.onNext(2);
    assertTrue(boundary.hasSubscribers());

    source.onNext(3);
    boundary.onNext(3);
    assertTrue(boundary.hasSubscribers());

    source.onNext(4);
    source.onComplete();

    ts.assertNoErrors();
    ts.assertValueCount(4);
    ts.assertComplete();

    assertFalse(source.hasSubscribers());
    assertFalse(boundary.hasSubscribers());
}
 

import java.util.concurrent.atomic.AtomicInteger; //導入方法依賴的package包/類
@Test
public void testAddTokenChangeListener() throws IOException {
  final AtomicInteger counter = new AtomicInteger(0);
  MockGoogleCredentials credentials = new MockGoogleCredentials() {
    @Override
    public AccessToken refreshAccessToken() throws IOException {
      Date expiry = new Date(System.currentTimeMillis() + TimeUnit.HOURS.toMillis(1));
      return new AccessToken("token-" + counter.getAndIncrement(), expiry);
    }
  };

  FirebaseOptions options = new FirebaseOptions.Builder()
      .setCredentials(credentials)
      .build();
  FirebaseApp app = FirebaseApp.initializeApp(options);

  // Disable proactive token refresh, so only explicit refresh events are in play.
  JvmAuthTokenProvider provider = new JvmAuthTokenProvider(app, DIRECT_EXECUTOR, false);
  final List<String> tokens = new ArrayList<>();
  provider.addTokenChangeListener(new AuthTokenProvider.TokenChangeListener() {
    @Override
    public void onTokenChange(String token) {
      tokens.add(token);
    }
  });

  for (int i = 0; i < 10; i++) {
    // Each refresh event should notify the TokenChangeListener. And since we are using a
    // direct executor, the notification fires on the same thread in a blocking manner.
    credentials.refresh();
    assertEquals(i + 1, tokens.size());
    assertToken(tokens.get(i), "token-" + i, ImmutableMap.<String, Object>of());
  }
}
 

import java.util.concurrent.atomic.AtomicInteger; //導入方法依賴的package包/類
/**
 * shutdownNow returns a list containing tasks that were not run,
 * and those tasks are drained from the queue
 */
public void testShutdownNow() throws InterruptedException {
    final int poolSize = 2;
    final int count = 5;
    final AtomicInteger ran = new AtomicInteger(0);
    final CustomExecutor p = new CustomExecutor(poolSize);
    final CountDownLatch threadsStarted = new CountDownLatch(poolSize);
    Runnable waiter = new CheckedRunnable() { public void realRun() {
        threadsStarted.countDown();
        try {
            MILLISECONDS.sleep(2 * LONG_DELAY_MS);
        } catch (InterruptedException success) {}
        ran.getAndIncrement();
    }};
    for (int i = 0; i < count; i++)
        p.execute(waiter);
    await(threadsStarted);
    assertEquals(poolSize, p.getActiveCount());
    assertEquals(0, p.getCompletedTaskCount());
    final List<Runnable> queuedTasks;
    try {
        queuedTasks = p.shutdownNow();
    } catch (SecurityException ok) {
        return; // Allowed in case test doesn't have privs
    }
    assertTrue(p.isShutdown());
    assertTrue(p.getQueue().isEmpty());
    assertEquals(count - poolSize, queuedTasks.size());
    assertTrue(p.awaitTermination(LONG_DELAY_MS, MILLISECONDS));
    assertTrue(p.isTerminated());
    assertEquals(poolSize, ran.get());
    assertEquals(poolSize, p.getCompletedTaskCount());
}
 

import java.util.concurrent.atomic.AtomicInteger; //導入方法依賴的package包/類
/**
 * The supplied barrier action is run at barrier
 */
public void testBarrierAction() throws Exception {
    final AtomicInteger count = new AtomicInteger(0);
    final Runnable incCount = new Runnable() { public void run() {
        count.getAndIncrement(); }};
    CyclicBarrier b = new CyclicBarrier(1, incCount);
    assertEquals(1, b.getParties());
    assertEquals(0, b.getNumberWaiting());
    b.await();
    b.await();
    assertEquals(0, b.getNumberWaiting());
    assertEquals(2, count.get());
}
 

import java.util.concurrent.atomic.AtomicInteger; //導入方法依賴的package包/類
/**
 * Inserts the specified element at the tail of this queue, waiting if
 * necessary up to the specified wait time for space to become available.
 *
 * @return {@code true} if successful, or {@code false} if
 *         the specified waiting time elapses before space is available
 * @throws InterruptedException {@inheritDoc}
 * @throws NullPointerException {@inheritDoc}
 */
public boolean offer(E e, long timeout, TimeUnit unit)
    throws InterruptedException {

    if (e == null) throw new NullPointerException();
    long nanos = unit.toNanos(timeout);
    int c = -1;
    final ReentrantLock putLock = this.putLock;
    final AtomicInteger count = this.count;
    putLock.lockInterruptibly();
    try {
        while (count.get() == capacity) {
            if (nanos <= 0)
                return false;
            nanos = notFull.awaitNanos(nanos);
        }
        enqueue(new Node<E>(e));
        c = count.getAndIncrement();
        if (c + 1 < capacity)
            notFull.signal();
    } finally {
        putLock.unlock();
    }
    if (c == 0)
        signalNotEmpty();
    return true;
}
 

import java.util.concurrent.atomic.AtomicInteger; //導入方法依賴的package包/類
private static void testBasicRetriesToSuccess(int expectedRetries, boolean wrapWithApplicationException)
        throws Exception
{
    RetryPolicy retryPolicy = new RetryPolicy(
            new DriftClientConfig()
                    .setMaxRetries(expectedRetries + 10)
                    .setMinBackoffDelay(new Duration(1, SECONDS))
                    .setMaxBackoffDelay(new Duration(1, DAYS))
                    .setBackoffScaleFactor(2.0),
            new TestingExceptionClassifier());

    TestingMethodInvocationStat stat = new TestingMethodInvocationStat();
    AtomicInteger attempts = new AtomicInteger();
    MockMethodInvoker invoker = new MockMethodInvoker(() -> {
        int currentAttempts = attempts.getAndIncrement();
        if (currentAttempts < expectedRetries) {
            return immediateFailedFuture(createClassifiedException(true, NORMAL, wrapWithApplicationException));
        }
        return immediateFuture(SUCCESS);
    });
    DriftMethodInvocation<?> methodInvocation = createDriftMethodInvocation(retryPolicy, stat, invoker, new TestingAddressSelector(100), systemTicker());

    assertEquals(methodInvocation.get(), SUCCESS);
    assertEquals(attempts.get(), expectedRetries + 1);
    stat.assertSuccess(expectedRetries);
    assertDelays(invoker, retryPolicy, expectedRetries);
}