Example usage for java.util.concurrent.atomic AtomicReference get

Introduction

In this page you can find the example usage for java.util.concurrent.atomic AtomicReference get.

Prototype

public final V get() 

Source Link

Document

Returns the current value, with memory effects as specified by VarHandle#getVolatile .

Usage

From source file:com.microsoft.tfs.client.common.ui.wizard.common.WizardServerSelectionPage.java

private List<TFSConnection> getConfigurationServers(final List<Account> accounts,
        final AtomicReference<JwtCredentials> vstsCredentialsHolder,
        final Action<DeviceFlowResponse> deviceFlowCallback) {
    final List<TFSConnection> configurationServers = new ArrayList<TFSConnection>(100);

    final JwtCredentials vstsCredentials = vstsCredentialsHolder.get();
    for (final Account account : accounts) {
        log.debug("Account name = " + account.getAccountName()); //$NON-NLS-1$
        log.debug("Account URI  = " + account.getAccountUri()); //$NON-NLS-1$

        final String accountURI = "https://" + account.getAccountName() + ".visualstudio.com"; //$NON-NLS-1$ //$NON-NLS-2$

        try {/*from w w w .  j a  v  a 2 s .co  m*/
            final URI uri = URIUtils.newURI(accountURI);
            final TFSConnection configurationServer = openAccount(uri,
                    CredentialsHelper.getOAuthCredentials(uri, vstsCredentials, deviceFlowCallback));
            if (configurationServer != null) {
                configurationServers.add(configurationServer);
            }
        } catch (final Exception e) {
            log.error(e.getMessage(), e);
        }
    }

    return configurationServers;
}

---

From source file:info.archinnov.achilles.it.TestEntityWithStaticColumn.java

@Test
public void should_insert_static_if_not_exist() throws Exception {
    //Given/*from w  w w  .j  a v a  2s.  c o  m*/
    final AtomicReference<LWTResult> lwtResultRef = new AtomicReference<>();
    final long id = RandomUtils.nextLong(0L, Long.MAX_VALUE);
    final EntityWithStaticColumn entity = new EntityWithStaticColumn(id, null, "static_val", null);

    manager.crud().insertStatic(entity).ifNotExists().execute();

    //When
    manager.crud().insertStatic(entity).ifNotExists().withLwtResultListener(lwtResultRef::set).execute();

    //Then
    assertThat(lwtResultRef.get()).isNotNull();
    assertThat(lwtResultRef.get().currentValues().<String>getTyped("static_col")).isEqualTo("static_val");
}

---

From source file:com.netflix.discovery.shared.Applications.java

/**
 * Gets the list of <em>instances</em> associated to a virtual host name.
 *
 * @param virtualHostName//from ww w .  ja  v  a 2 s . c om
 *            the virtual hostname for which the instances need to be
 *            returned.
 * @return list of <em>instances</em>.
 */
public List<InstanceInfo> getInstancesByVirtualHostName(String virtualHostName) {
    AtomicReference<List<InstanceInfo>> ref = this.shuffleVirtualHostNameMap
            .get(virtualHostName.toUpperCase(Locale.ROOT));
    if (ref == null || ref.get() == null) {
        return new ArrayList<InstanceInfo>();
    } else {
        return ref.get();
    }
}

---

From source file:org.apache.batchee.cli.command.SocketCommand.java

protected void sendCommand() {
    if (adminSocket < 0) {
        throw new BatchContainerRuntimeException("specify -socket to be able to run this command");
    }/*w  ww  .ja  v a2  s. c  o  m*/

    Socket socket = null;
    try {
        socket = new Socket("localhost", adminSocket);
        socket.setSoTimeout(timeout);

        final CountDownLatch latch = new CountDownLatch(1);
        final AtomicReference<Integer> answer = new AtomicReference<Integer>();
        new AnswerThread(socket, answer, latch).start();

        final OutputStream outputStream = socket.getOutputStream();
        outputStream.write(command().getBytes());
        outputStream.flush();
        socket.shutdownOutput();

        try {
            latch.await(timeout, TimeUnit.MILLISECONDS);
        } catch (InterruptedException e) {
            info("no answer after " + timeout + "ms");
            return;
        }
        if (answer.get() != 0) {
            info("unexpected answer: " + answer.get());
        }
    } catch (final IOException e) {
        throw new BatchContainerRuntimeException(e);
    } finally {
        IOUtils.closeQuietly(socket);
    }
}

---

From source file:com.netflix.discovery.shared.Applications.java

/**
 * Gets the list of secure <em>instances</em> associated to a virtual host
 * name./*from  www .jav  a 2  s.  c o  m*/
 *
 * @param secureVirtualHostName
 *            the virtual hostname for which the secure instances need to be
 *            returned.
 * @return list of <em>instances</em>.
 */
public List<InstanceInfo> getInstancesBySecureVirtualHostName(String secureVirtualHostName) {
    AtomicReference<List<InstanceInfo>> ref = this.shuffledSecureVirtualHostNameMap
            .get(secureVirtualHostName.toUpperCase(Locale.ROOT));
    if (ref == null || ref.get() == null) {
        return new ArrayList<InstanceInfo>();
    } else {
        return ref.get();
    }
}

---

From source file:de.hybris.platform.test.HJMPTest.java

@Test
public void testHiddenPKLookupWithRetry() {
    final PK nonExistingProductPK = PK.createFixedPK(Constants.TC.Product, System.nanoTime());

    final long TIMEOUT = 30 * 1000;

    final Object token = HJMPUtils.enablePKLookupRetry(TIMEOUT, 500);
    try {//from  w  w  w  .  ja v a  2 s. c  om
        // start lookup in own thread -> must wait since PK doesnt exist yet
        final AtomicReference<Boolean> success = startPKLookupInOtherThread(nonExistingProductPK);

        // wait for 5 seconds to allow a decent amount of turns
        Thread.sleep(5 * 1000);
        assertNull("Result available before end of lookup retry period", success.get()); // still no result

        // now create product with exactly that pk -> now lookup should succeed eventually
        final Product product = ProductManager.getInstance().createProduct(null, nonExistingProductPK, "PPP");
        assertTrue(product.isAlive());
        final PK createdPK = product.getPK();
        assertEquals(createdPK, nonExistingProductPK); // sanity check

        // wait for lookup result for 10 seconds 
        final long maxWait = System.currentTimeMillis() + TIMEOUT;
        while (success.get() == null && System.currentTimeMillis() < maxWait) {
            Thread.sleep(500);
        }
        assertEquals("Wrong retry lookup result", Boolean.TRUE, success.get());
    } catch (final Exception e) {
        fail(e.getMessage());
    } finally {
        HJMPUtils.restorPKLookupRetry(token);
    }
}

---

From source file:com.netflix.config.ConcurrentMapConfigurationTest.java

@Test
public void testListeners() {
    ConcurrentMapConfiguration conf = new ConcurrentMapConfiguration();
    final AtomicReference<ConfigurationEvent> eventRef = new AtomicReference<ConfigurationEvent>();
    conf.addConfigurationListener(new ConfigurationListener() {
        @Override/*from  w  w  w  .ja v  a  2s.  com*/
        public void configurationChanged(ConfigurationEvent arg0) {
            eventRef.set(arg0);
        }

    });
    conf.addProperty("key", "1");
    assertEquals(1, conf.getInt("key"));
    ConfigurationEvent event = eventRef.get();
    assertEquals("key", event.getPropertyName());
    assertEquals("1", event.getPropertyValue());
    assertTrue(conf == event.getSource());
    assertEquals(AbstractConfiguration.EVENT_ADD_PROPERTY, event.getType());
    conf.setProperty("key", "2");
    event = eventRef.get();
    assertEquals("key", event.getPropertyName());
    assertEquals("2", event.getPropertyValue());
    assertTrue(conf == event.getSource());
    assertEquals(AbstractConfiguration.EVENT_SET_PROPERTY, event.getType());
    conf.clearProperty("key");
    event = eventRef.get();
    assertEquals("key", event.getPropertyName());
    assertNull(event.getPropertyValue());
    assertTrue(conf == event.getSource());
    assertEquals(AbstractConfiguration.EVENT_CLEAR_PROPERTY, event.getType());
    conf.clear();
    assertFalse(conf.getKeys().hasNext());
    event = eventRef.get();
    assertTrue(conf == event.getSource());
    assertEquals(AbstractConfiguration.EVENT_CLEAR, event.getType());
}

---

From source file:org.hawkular.listener.cache.InventoryHelperTest.java

@Test
public void shouldListEmptyMetricTypesWhenChunksAreIncomplete() {
    // Data & mocks
    Metric<String> m1 = new Metric<>("inventory.123.mt.m1", null, 7, MetricType.STRING, null);
    long currentTime = System.currentTimeMillis();
    when(metricsService.findMetricsWithFilters(anyString(), anyObject(), anyString()))
            .thenAnswer(invocationOnMock -> Observable.just(m1));
    DataPoint<String> tempDataPoint = buildMetricTypeDatapoint(currentTime - 500, "metricType1",
            "metric type 1");
    DataPoint<String> dataPoint = new DataPoint<>(tempDataPoint.getTimestamp(), tempDataPoint.getValue(),
            ImmutableMap.<String, String>builder().put("chunks", "3").put("size", "1000").build());
    when(metricsService.findStringData(m1.getMetricId(), 0, currentTime, false, 0, Order.DESC))
            .thenReturn(Observable.just(dataPoint));

    // Test & assertions
    AtomicReference<Throwable> refException = new AtomicReference<>();
    InventoryHelper.listMetricTypes(metricsService, "tenant", "feed", currentTime).toList().subscribe(a -> {
    }, refException::set);/*from  w  w w. j  av a  2 s .  c  o m*/
    Assert.assertEquals(InvalidInventoryChunksException.class, refException.get().getCause().getClass());
    Assert.assertTrue("Unexpected message: " + refException.get().getCause().getMessage(),
            refException.get().getCause().getMessage()
                    .contains("Inventory sanity check failure: 3 chunks expected, only 1 are available"));
}

---

From source file:com.netflix.curator.framework.recipes.locks.TestInterProcessSemaphoreCluster.java

@Test
public void testKilledServerWithEnsembleProvider() throws Exception {
    final int CLIENT_QTY = 10;
    final Timing timing = new Timing();
    final String PATH = "/foo/bar/lock";

    ExecutorService executorService = Executors.newFixedThreadPool(CLIENT_QTY);
    ExecutorCompletionService<Void> completionService = new ExecutorCompletionService<Void>(executorService);
    TestingCluster cluster = new TestingCluster(3);
    try {// w w  w .  java 2s  .  c  o  m
        cluster.start();

        final AtomicReference<String> connectionString = new AtomicReference<String>(
                cluster.getConnectString());
        final EnsembleProvider provider = new EnsembleProvider() {
            @Override
            public void start() throws Exception {
            }

            @Override
            public String getConnectionString() {
                return connectionString.get();
            }

            @Override
            public void close() throws IOException {
            }
        };

        final Semaphore acquiredSemaphore = new Semaphore(0);
        final AtomicInteger acquireCount = new AtomicInteger(0);
        final CountDownLatch suspendedLatch = new CountDownLatch(CLIENT_QTY);
        for (int i = 0; i < CLIENT_QTY; ++i) {
            completionService.submit(new Callable<Void>() {
                @Override
                public Void call() throws Exception {
                    CuratorFramework client = CuratorFrameworkFactory.builder().ensembleProvider(provider)
                            .sessionTimeoutMs(timing.session()).connectionTimeoutMs(timing.connection())
                            .retryPolicy(new ExponentialBackoffRetry(100, 3)).build();
                    try {
                        final Semaphore suspendedSemaphore = new Semaphore(0);
                        client.getConnectionStateListenable().addListener(new ConnectionStateListener() {
                            @Override
                            public void stateChanged(CuratorFramework client, ConnectionState newState) {
                                if ((newState == ConnectionState.SUSPENDED)
                                        || (newState == ConnectionState.LOST)) {
                                    suspendedLatch.countDown();
                                    suspendedSemaphore.release();
                                }
                            }
                        });

                        client.start();

                        InterProcessSemaphoreV2 semaphore = new InterProcessSemaphoreV2(client, PATH, 1);

                        while (!Thread.currentThread().isInterrupted()) {
                            Lease lease = null;
                            try {
                                lease = semaphore.acquire();
                                acquiredSemaphore.release();
                                acquireCount.incrementAndGet();
                                suspendedSemaphore.acquire();
                            } catch (Exception e) {
                                // just retry
                            } finally {
                                if (lease != null) {
                                    acquireCount.decrementAndGet();
                                    IOUtils.closeQuietly(lease);
                                }
                            }
                        }
                    } finally {
                        IOUtils.closeQuietly(client);
                    }
                    return null;
                }
            });
        }

        Assert.assertTrue(timing.acquireSemaphore(acquiredSemaphore));
        Assert.assertEquals(1, acquireCount.get());

        cluster.close();
        timing.awaitLatch(suspendedLatch);
        timing.forWaiting().sleepABit();
        Assert.assertEquals(0, acquireCount.get());

        cluster = new TestingCluster(3);
        cluster.start();

        connectionString.set(cluster.getConnectString());
        timing.forWaiting().sleepABit();

        Assert.assertTrue(timing.acquireSemaphore(acquiredSemaphore));
        timing.forWaiting().sleepABit();
        Assert.assertEquals(1, acquireCount.get());
    } finally {
        executorService.shutdown();
        executorService.awaitTermination(10, TimeUnit.SECONDS);
        executorService.shutdownNow();
        IOUtils.closeQuietly(cluster);
    }
}

---

From source file:org.hawkular.listener.cache.InventoryHelperTest.java

@Test
public void shouldFailOnListMetricTypesWhenChunksAreInvalid() {
    // Data & mocks
    Metric<String> m1 = new Metric<>("inventory.123.mt.m1", null, 7, MetricType.STRING, null);
    long currentTime = System.currentTimeMillis();
    when(metricsService.findMetricsWithFilters(anyString(), anyObject(), anyString()))
            .thenAnswer(invocationOnMock -> Observable.just(m1));
    DataPoint<String> tempDataPoint = buildMetricTypeDatapoint(currentTime - 500, "metricType1",
            "metric type 1");
    DataPoint<String> dataPoint = new DataPoint<>(tempDataPoint.getTimestamp(), tempDataPoint.getValue(),
            ImmutableMap.<String, String>builder().put("chunks", "3").put("size", "1000").build());
    when(metricsService.findStringData(m1.getMetricId(), 0, currentTime, false, 0, Order.DESC))
            .thenReturn(Observable.just(dataPoint,
                    buildMetricTypeDatapoint(currentTime - 501, "metricType1", "metric type 1"),
                    buildMetricTypeDatapoint(currentTime - 800, "metricType1", "metric type 1")));

    // Test & assertions
    AtomicReference<Throwable> refException = new AtomicReference<>();
    InventoryHelper.listMetricTypes(metricsService, "tenant", "feed", currentTime).toList().subscribe(a -> {
    }, refException::set);/*from ww w.  j  av  a  2  s  . co  m*/
    Assert.assertEquals(InvalidInventoryChunksException.class, refException.get().getCause().getClass());
    Assert.assertTrue("Unexpected message: " + refException.get().getCause().getMessage(), refException.get()
            .getCause().getMessage().contains("Inventory sanity check failure: chunk n2 timestamp is"));
}

---

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