Java AtomicInteger.set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 testOfferInStealQueueFromShouldUnblock() throws InterruptedException {
  final AtomicInteger taken = new AtomicInteger();
  Thread consumer = new Thread() {
    @Override
    public void run() {
      try {
        Integer n = stealJobQueue.take();
        taken.set(n);
      } catch (InterruptedException e) {
        e.printStackTrace();
      }
    }
  };
  consumer.start();
  stealFromQueue.offer(3);
  consumer.join(1000);
  assertEquals(3, taken.get());
  consumer.interrupt(); //Ensure the consumer thread will stop.
}
 

import java.util.concurrent.atomic.AtomicInteger; //導入方法依賴的package包/類
@Test
public void respondSuccess() throws CheckedFutureException {
  Promise<Integer> p = Promise.apply();
  AtomicInteger result = new AtomicInteger(-1);
  AtomicBoolean failure = new AtomicBoolean(false);
  Responder<Integer> r = new Responder<Integer>() {
    @Override
    public void onException(Throwable ex) {
      failure.set(true);
    }

    @Override
    public void onValue(Integer value) {
      result.set(value);
    }
  };
  Future<Integer> f = p.respond(r);
  p.setValue(1);
  assertEquals(1, result.get());
  assertFalse(failure.get());
  assertEquals(new Integer(1), get(p));
  assertEquals(new Integer(1), get(f));
}
 

import java.util.concurrent.atomic.AtomicInteger; //導入方法依賴的package包/類
/**
 * Decrement the counter if this tag returns true from {@link #isStampingTag()}. Allows the code
 * to check if we are outside of all stamping component tags.
 *
 * @see #_checkStartingStampingTag(Map)
 */
private void _checkEndingStampingTag()
{
  if (isStampingTag())
  {
    Map<Object, Object> facesContextAttributes = getFacesContext().getAttributes();
    AtomicInteger count = (AtomicInteger)facesContextAttributes.get(_STAMPING_COUNT_KEY);
    if (count.get() == 1)
    {
      facesContextAttributes.remove(_STAMPING_COUNT_KEY);
    }
    else
    {
      count.set(count.get() - 1);
    }
  }
}
 

import java.util.concurrent.atomic.AtomicInteger; //導入方法依賴的package包/類
/**
 * intValue returns current value.
 */
public void testIntValue() {
    AtomicInteger ai = new AtomicInteger();
    assertEquals(0, ai.intValue());
    for (int x : VALUES) {
        ai.set(x);
        assertEquals(x, ai.intValue());
    }
}
 

import java.util.concurrent.atomic.AtomicInteger; //導入方法依賴的package包/類
public static BooleanSupplier conditionTrueForNIterations(BooleanSupplier condition, int iters) {
	final AtomicInteger ai = new AtomicInteger(0);

	return () -> {
		if (condition.getAsBoolean()) {
			int i = ai.incrementAndGet();
			return i >= iters;
		} else {
			ai.set(0);
			return false;
		}
	};
}
 

import java.util.concurrent.atomic.AtomicInteger; //導入方法依賴的package包/類
/** Confirm that Retrofit encodes parameters when the call is executed, and not earlier. */
@Test public void argumentCapture() throws Exception {
  AtomicInteger i = new AtomicInteger();

  server.enqueue(new MockResponse().setBody("a"));
  server.enqueue(new MockResponse().setBody("b"));

  Retrofit retrofit = new Retrofit.Builder()
      .baseUrl(server.url("/"))
      .addConverterFactory(new ToStringConverterFactory())
      .build();
  MutableParameters mutableParameters = retrofit.create(MutableParameters.class);

  i.set(100);
  Call<String> call1 = mutableParameters.method(i);

  i.set(101);
  Response<String> response1 = call1.execute();

  i.set(102);
  assertEquals("a", response1.body());
  assertEquals("/?i=101", server.takeRequest().getPath());

  i.set(200);
  Call<String> call2 = call1.clone();

  i.set(201);
  Response<String> response2 = call2.execute();

  i.set(202);
  assertEquals("b", response2.body());

  assertEquals("/?i=201", server.takeRequest().getPath());
}
 

import java.util.concurrent.atomic.AtomicInteger; //導入方法依賴的package包/類
@Test
public void pipeResource() throws IOException, InterruptedException {
    BytesBiChannel<Pipe> pipe = IoStream.pipe();
    
    final OutputStreamOf<Pipe> output = pipe.outputStream();
    final InputStreamOf<Pipe> input = output.get().inputStream();
    final AtomicInteger ai = new AtomicInteger();
    
    Thread t = new Thread(() -> {
        try {
            int i;
            while ((i = input.read()) != -1) {
                ai.set(i);
            }
        } catch (IOException e) {
            e.printStackTrace();
        }
    });
    t.start();
    
    output.write(58);
    t.join(50);
    
    output.close();
    
    Assertions.assertThat(ai.get()).isEqualTo(58);
}
 

import java.util.concurrent.atomic.AtomicInteger; //導入方法依賴的package包/類
public void testBatchNodeRecreation() throws Exception { // #211847
    final List<Integer> nodesCreated = new ArrayList<Integer>();
    final AtomicInteger size = new AtomicInteger(3);
    class F extends ChildFactory<Integer> {
        @Override protected boolean createKeys(List<Integer> keys) {
            List<Integer> arr = new ArrayList<Integer>();
            for (int i = 1; i <= size.get(); i++) {
                arr.add(i);
            }
            keys.addAll(arr);
            return true;
        }
        @Override protected Node createNodeForKey(Integer key) {
            nodesCreated.add(key);
            Node n = new AbstractNode(Children.LEAF);
            n.setName(key.toString());
            return n;
        }
        void refresh() {
            refresh(false);
        }
    }
    F f = new F();
    Children c = Children.create(f, true);
    Node root = new AbstractNode(c);
    
    // must keep reference to nodes => each node keeps ref to ChildrenArray (its parent ChildrenArray)
    // so it cannot be GCed
    Node[] nodes = root.getChildren().getNodes(true);
    assertEquals(3, nodes.length);
    assertEquals("[1, 2, 3]", nodesCreated.toString());
    LOG.info("Three elements in there!");
    size.set(4);
    f.refresh();
    LOG.info("After refresh");
    nodes = root.getChildren().getNodes(true);
    assertEquals(4, nodes.length);
    assertEquals("[1, 2, 3, 4]", nodesCreated.toString());
}
 

import java.util.concurrent.atomic.AtomicInteger; //導入方法依賴的package包/類
/**
 * getAndIncrement returns previous value and increments
 */
public void testGetAndIncrement() {
    AtomicInteger ai = new AtomicInteger(1);
    assertEquals(1, ai.getAndIncrement());
    assertEquals(2, ai.get());
    ai.set(-2);
    assertEquals(-2, ai.getAndIncrement());
    assertEquals(-1, ai.getAndIncrement());
    assertEquals(0, ai.getAndIncrement());
    assertEquals(1, ai.get());
}
 

import java.util.concurrent.atomic.AtomicInteger; //導入方法依賴的package包/類
public static void refreshCacheTest(AbstractCacheBuilder builder, long refresh, long stopRefreshAfterLastAccess) throws Exception {
    AtomicInteger count = new AtomicInteger(0);
    builder.loader((key) -> key + "_V" + count.getAndIncrement());
    RefreshPolicy policy = RefreshPolicy.newPolicy(refresh, TimeUnit.MILLISECONDS);
    builder.refreshPolicy(policy);
    Cache cache = builder.buildCache();
    refreshCacheTest1(cache);
    cache.close();

    count.set(0);
    builder.getConfig().getRefreshPolicy().setStopRefreshAfterLastAccessMillis(stopRefreshAfterLastAccess);
    cache = builder.buildCache();
    refreshCacheTest2(cache);
    cache.close();
}
 

import java.util.concurrent.atomic.AtomicInteger; //導入方法依賴的package包/類
public void testReloadAfterFailure() throws ExecutionException {
  final AtomicInteger count = new AtomicInteger();
  final Exception e = new IllegalStateException("exception to trigger failure on first load()");
  CacheLoader<Integer, String> failOnceFunction = new CacheLoader<Integer, String>() {

    @Override
    public String load(Integer key) throws Exception {
      if (count.getAndIncrement() == 0) {
        throw e;
      }
      return key.toString();
    }
  };
  CountingRemovalListener<Integer, String> removalListener = countingRemovalListener();
  LoadingCache<Integer, String> cache = CacheBuilder.newBuilder()
      .removalListener(removalListener)
      .build(failOnceFunction);

  try {
    cache.getUnchecked(1);
    fail();
  } catch (UncheckedExecutionException ue) {
    assertSame(e, ue.getCause());
  }

  assertEquals("1", cache.getUnchecked(1));
  assertEquals(0, removalListener.getCount());

  count.set(0);
  cache.refresh(2);
  checkLoggedCause(e);

  assertEquals("2", cache.getUnchecked(2));
  assertEquals(0, removalListener.getCount());

}
 

import java.util.concurrent.atomic.AtomicInteger; //導入方法依賴的package包/類
public void testFlagsEvents() throws Exception {
    InstanceContent ic = new InstanceContent();
    Lookup lookup = new AbstractLookup(ic);
    final URL root1 = FileUtil.urlForArchiveOrDir(FileUtil.normalizeFile(new File(getWorkDir(),"root1")));
    final URL root2 = FileUtil.urlForArchiveOrDir(FileUtil.normalizeFile(new File(getWorkDir(),"root2")));

    ProviderImpl defaultCP = new ProviderImpl();
    final MutableCPImpl cpImpl = new MutableCPImpl(root1);
    defaultCP.paths.put(ClassPath.COMPILE, ClassPathFactory.createClassPath(cpImpl));
    ClassPathProviderMerger instance = new ClassPathProviderMerger(defaultCP);
    ClassPathProvider result = instance.merge(lookup);

    ClassPath compile = result.findClassPath(null, ClassPath.COMPILE);
    assertNotNull(compile);

    final AtomicInteger count = new AtomicInteger();
    compile.addPropertyChangeListener((evt) -> {
        if (ClassPath.PROP_FLAGS.equals(evt.getPropertyName())) {
            count.incrementAndGet();
        }
    });
    final ProviderImpl additional = new ProviderImpl();
    final MutableCPImpl addCpImpl = new MutableCPImpl(root2);
    addCpImpl.add(ClassPath.Flag.INCOMPLETE);
    additional.paths.put(ClassPath.COMPILE, ClassPathFactory.createClassPath(addCpImpl));
    ic.add(additional);
    assertEquals(1, count.get());
    count.set(0);
    addCpImpl.remove(ClassPath.Flag.INCOMPLETE);
    assertEquals(1, count.get());
    count.set(0);
    addCpImpl.add(ClassPath.Flag.INCOMPLETE);
    assertEquals(1, count.get());
    count.set(0);
}
 

import java.util.concurrent.atomic.AtomicInteger; //導入方法依賴的package包/類
public static void main(String[] args) throws Exception {
    CountDownLatch prepareLatch = new CountDownLatch(2);
    AtomicInteger goLatch = new AtomicInteger(1);
    Task taskA = new Task(prepareLatch, goLatch, AnnA.class);
    Task taskB = new Task(prepareLatch, goLatch, AnnB.class);
    taskA.start();
    taskB.start();
    // wait until both threads start-up
    prepareLatch.await();
    // let them go
    goLatch.set(0);
    // obtain ThreadMXBean
    ThreadMXBean threadBean = ManagementFactory.getThreadMXBean();
    // wait for threads to finish or dead-lock
    while (taskA.isAlive() || taskB.isAlive()) {
        // attempt to join threads
        taskA.join(500L);
        taskB.join(500L);
        // detect dead-lock
        long[] deadlockedIds = threadBean.findMonitorDeadlockedThreads();
        if (deadlockedIds != null && deadlockedIds.length > 0) {
            StringBuilder sb = new StringBuilder("deadlock detected:\n\n");
            for (ThreadInfo ti : threadBean.getThreadInfo(deadlockedIds, Integer.MAX_VALUE)) {
                sb.append(ti);
            }
            throw new IllegalStateException(sb.toString());
        }
    }
}
 

import java.util.concurrent.atomic.AtomicInteger; //導入方法依賴的package包/類
@POST
@Path("conversations")
@Secure
public Response sendMessage(Message message) throws InterruptedException {
    final SmsManager sms = SmsManager.getDefault();
    final ArrayList<String> parts = sms.divideMessage(message.getBody());
    final CountDownLatch sentLatch = new CountDownLatch(parts.size());
    final AtomicInteger statusCode =
            new AtomicInteger(Response.Status.CREATED.getStatusCode());
    final BroadcastReceiver receiver = new BroadcastReceiver() {
        @Override
        public void onReceive(Context context, Intent intent) {
            if (getResultCode() != Activity.RESULT_OK) {
                statusCode.set(Response.Status.INTERNAL_SERVER_ERROR.getStatusCode());
            }
            sentLatch.countDown();
        }
    };
    deskDroidService.registerReceiver(receiver, new IntentFilter("com.steeplesoft.deskdroid.SMS_SENT"));
    ArrayList<PendingIntent> sentPIs = new ArrayList<>();
    for (int i = 0; i < parts.size(); i++) {
        sentPIs.add(PendingIntent.getBroadcast(deskDroidService.getApplicationContext(), 0,
                new Intent("com.steeplesoft.deskdroid.SMS_SENT"), 0));
    }
    sms.sendMultipartTextMessage(message.getAddress(), null, parts, sentPIs, null);

    sentLatch.await(5, TimeUnit.SECONDS);
    deskDroidService.unregisterReceiver(receiver);
    return Response.status(statusCode.get()).build();

}
 

import java.util.concurrent.atomic.AtomicInteger; //導入方法依賴的package包/類
@Test
public void test() {
    AtomicInteger ai = new AtomicInteger();
    for (int i=0; i < 10000; i++) {
        try {
            SecureRandom random = SecureRandom.getInstance("NativePRNGNonBlocking");
            ai.set(random.nextInt());
        } catch (NoSuchAlgorithmException e) {
            throw new UnreachableException(e);
        }
    }
}