Package java.util.concurrent.atomic

Examples of java.util.concurrent.atomic.AtomicReference

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        final AsyncHttpClient client = getAsyncHttpClient(new AsyncHttpClientConfig.Builder().setConnectTimeout(1000).setRequestTimeout(5000).setAllowPoolingConnections(true)//
                .setMaxConnections(1).setMaxConnectionsPerHost(1).build());

        final CountDownLatch inThreadsLatch = new CountDownLatch(2);
        final AtomicReference<Integer> failedRank = new AtomicReference(-1);
       
        try {
            for (int i = 0; i < urls.length; i++) {
                final String url = urls[i];
                final int rank = i;
                Thread t = new Thread() {
                    public void run() {
                        client.prepareGet(url).execute(new AsyncCompletionHandlerBase() {
                            @Override
                            public Response onCompleted(Response response) throws Exception {
                                Response r = super.onCompleted(response);
                                inThreadsLatch.countDown();
                                return r;
                            }
                           
                            @Override
                            public void onThrowable(Throwable t) {
                                super.onThrowable(t);
                                failedRank.set(rank);
                                inThreadsLatch.countDown();
                            }
                        });
                    }
                };
                t.start();
            }

            inThreadsLatch.await();

            assertEquals(failedRank.get().intValue(), 1, "Max Connections should have been reached");

            final CountDownLatch notInThreadsLatch = new CountDownLatch(2);
            failedRank.set(-1);
            for (int i = 0; i < urls.length; i++) {
                final String url = urls[i];
                final int rank = i;
                client.prepareGet(url).execute(new AsyncCompletionHandlerBase() {
                    @Override
                    public Response onCompleted(Response response) throws Exception {
                        Response r = super.onCompleted(response);
                        notInThreadsLatch.countDown();
                        return r;
                    }
                   
                    @Override
                    public void onThrowable(Throwable t) {
                        super.onThrowable(t);
                        failedRank.set(rank);
                        notInThreadsLatch.countDown();
                    }
                });
            }
           
            notInThreadsLatch.await();
           
            assertEquals(failedRank.get().intValue(), 1, "Max Connections should have been reached");
        } finally {
            client.close();
        }
    }
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    public JndiNamingObjectFactory(String name, String jndiName, boolean cacheResult) {
        this.name = name;
        this.jndiName = jndiName;
        this.cacheResult = cacheResult;
        this.value = new AtomicReference();      
    }
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        super(admin, orb, poa, conf, taskProcessor, offerManager, subscriptionManager,
                consumerAdmin);

        pushTaskExecutor_ = pushTaskExecutorFactory.newExecutor(this);

        retryStrategyFactory_ = new AtomicReference(newRetryStrategyFactory(conf, taskProcessor));

        eventTypes_.add(NOTIFY_PUSH_FAILED);
    }
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        final AtomicBoolean received = new AtomicBoolean(false);
        final AtomicBoolean delivered = new AtomicBoolean(false);
        final CountDownLatch threadsDone = new CountDownLatch(1);
        final CountDownLatch getPutOrder = new CountDownLatch(1);
        final AtomicReference getException = new AtomicReference(null);
        final AtomicReference putException = new AtomicReference(null);

        final CyclicBarrier barrier = new CyclicBarrier(2, new Runnable()
        {
            public void run()
            {
                threadsDone.countDown();
            }
        });

        Runnable getCommand = new Runnable()
        {
            public void run()
            {
                try
                {
                    synchronized (lock_)
                    {
                        getPutOrder.countDown();
                        objectUnderTest_.getMessageBlocking();
                    }

                    received.set(true);
                } catch (Exception e)
                {
                    getException.set(e);
                }
                finally
                {
                    try
                    {
                        barrier.await();
                    } catch (InterruptedException e)
                    {
                        // ignored
                    } catch (BrokenBarrierException e)
                    {
                        // should not happen
                        e.printStackTrace();
                    }
                }
            }
        };

        Runnable putCommand = new Runnable()
        {
            public void run()
            {
                try
                {
                    getPutOrder.await();

                    objectUnderTest_.enqeue(mesg.getHandle());

                    delivered.set(true);
                } catch (Exception e)
                {
                    putException.set(e);
                }
                finally
                {
                    try
                    {
                        barrier.await();
                    } catch (InterruptedException e)
                    {
                        // ignored
                    } catch (BrokenBarrierException e)
                    {
                        // should not happen
                        e.printStackTrace();
                    }
                }
            }
        };

        Thread getter = new Thread(getCommand);
        getter.setDaemon(true);

        Thread putter = new Thread(putCommand);
        putter.setDaemon(true);

        getter.start();

        putter.start();

        threadsDone.await(1000, TimeUnit.MILLISECONDS);

        assertTrue(delivered.get());
        assertTrue(received.get());

        assertNull(putException.get());
        assertNull(getException.get());

        getter.interrupt();
        putter.interrupt();
    }
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    }

    @Test
    public void should_notify_listener_when_trying_to_insert_with_cas_because_already_exist() throws Exception {
        //Given
        final AtomicReference<CASResult> atomicCASResult = new AtomicReference(null);
        CASResultListener listener = new CASResultListener() {
            @Override
            public void onCASSuccess() {
            }

            @Override
            public void onCASError(CASResult casResult) {
                atomicCASResult.compareAndSet(null, casResult);
            }
        };
        final EntityWithEnum entityWithEnum = new EntityWithEnum(10L, "name", EACH_QUORUM);
        Map<String, Object> expectedCurrentValues = ImmutableMap.<String, Object>of("id", 10L, "[applied]", false, "consistency_level", EACH_QUORUM.name(), "name", "name");
        manager.insert(entityWithEnum);

        manager.insert(entityWithEnum, OptionsBuilder.ifNotExists().casResultListener(listener));

        final CASResult casResult = atomicCASResult.get();
        assertThat(casResult.operation()).isEqualTo(INSERT);
        assertThat(casResult.currentValues()).isEqualTo(expectedCurrentValues);
        assertThat(casResult.toString()).isEqualTo("CAS operation INSERT cannot be applied. Current values are: {[applied]=false, consistency_level=EACH_QUORUM, id=10, name=name}");
    }
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    @Test
    public void should_notify_listener_when_trying_to_insert_with_cas_and_ttl_because_already_exist() throws Exception {
        //Given
        final AtomicReference<CASResult> atomicCASResult = new AtomicReference(null);
        CASResultListener listener = new CASResultListener() {
            @Override
            public void onCASSuccess() {
            }

            @Override
            public void onCASError(CASResult casResult) {
                atomicCASResult.compareAndSet(null, casResult);
            }
        };
        final EntityWithEnum entityWithEnum = new EntityWithEnum(10L, "name", EACH_QUORUM);
        Map<String, Object> expectedCurrentValues = ImmutableMap.<String, Object>of("id", 10L, "[applied]", false, "consistency_level", EACH_QUORUM.name(), "name", "name");
        manager.insert(entityWithEnum);

        manager.insert(entityWithEnum, OptionsBuilder.ifNotExists()
                .withTtl(100).casResultListener(listener));

        final CASResult casResult = atomicCASResult.get();
        assertThat(casResult.operation()).isEqualTo(INSERT);
        assertThat(casResult.currentValues()).isEqualTo(expectedCurrentValues);
        assertThat(casResult.toString()).isEqualTo("CAS operation INSERT cannot be applied. Current values are: {[applied]=false, consistency_level=EACH_QUORUM, id=10, name=name}");
    }
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    }

    @Test
    public void should_notify_listener_when_failing_cas_update() throws Exception {
        //Given
        final AtomicReference<CASResult> atomicCASResult = new AtomicReference(null);
        CASResultListener listener = new CASResultListener() {
            @Override
            public void onCASSuccess() {
            }

            @Override
            public void onCASError(CASResult casResult) {
                atomicCASResult.compareAndSet(null, casResult);
            }
        };

        final EntityWithEnum entityWithEnum = new EntityWithEnum(10L, "John", EACH_QUORUM);
        final EntityWithEnum managed = manager.insert(entityWithEnum);
        Map<String, Object> expectedCurrentValues = ImmutableMap.<String, Object>of("[applied]", false, "consistency_level", EACH_QUORUM.name(), "name", "John");
        managed.setName("Helen");

        //When
        manager.update(managed,
                ifConditions(new CASCondition("name", "name"), new CASCondition("consistency_level", EACH_QUORUM))
                        .casResultListener(listener));

        final CASResult casResult = atomicCASResult.get();
        assertThat(casResult).isNotNull();
        assertThat(casResult.operation()).isEqualTo(UPDATE);
        assertThat(casResult.currentValues()).isEqualTo(expectedCurrentValues);
        assertThat(casResult.toString()).isEqualTo("CAS operation UPDATE cannot be applied. Current values are: {[applied]=false, consistency_level=EACH_QUORUM, name=John}");
    }
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    }

    @Test
    public void should_notify_listener_when_failing_cas_update_with_ttl() throws Exception {
        //Given
        final AtomicReference<CASResult> atomicCASResult = new AtomicReference(null);
        CASResultListener listener = new CASResultListener() {
            @Override
            public void onCASSuccess() {
            }

            @Override
            public void onCASError(CASResult casResult) {
                atomicCASResult.compareAndSet(null, casResult);
            }
        };

        final EntityWithEnum entityWithEnum = new EntityWithEnum(10L, "John", EACH_QUORUM);
        final EntityWithEnum managed = manager.insert(entityWithEnum);
        Map<String, Object> expectedCurrentValues = ImmutableMap.<String, Object>of("[applied]", false, "consistency_level", EACH_QUORUM.name(), "name", "John");
        managed.setName("Helen");

        //When
        manager.update(managed,
                ifConditions(new CASCondition("name", "name"), new CASCondition("consistency_level", EACH_QUORUM))
                        .casResultListener(listener)
                        .withTtl(100));

        final CASResult casResult = atomicCASResult.get();
        assertThat(casResult).isNotNull();
        assertThat(casResult.operation()).isEqualTo(UPDATE);
        assertThat(casResult.currentValues()).isEqualTo(expectedCurrentValues);
        assertThat(casResult.toString()).isEqualTo("CAS operation UPDATE cannot be applied. Current values are: {[applied]=false, consistency_level=EACH_QUORUM, name=John}");
    }
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    }

    @Test
    public void should_notify_listener_on_cas_update_failure() throws Exception {
        //Given
        final AtomicReference<CASResult> atomicCASResult = new AtomicReference(null);
        CASResultListener listener = new CASResultListener() {
            @Override
            public void onCASSuccess() {
            }

            @Override
            public void onCASError(CASResult casResult) {
                atomicCASResult.compareAndSet(null, casResult);
            }
        };
        Map<String, Object> expectedCurrentValues = ImmutableMap.<String, Object>of("[applied]", false, "name", "John");

        CompleteBean entity = builder().randomId().name("John").addFollowers("Paul", "Andrew").buid();
        final CompleteBean managed = manager.insert(entity);
        managed.getFollowers().add("Helen");

        //When
        manager.update(managed, ifConditions(new CASCondition("name", "Helen")).casResultListener(listener));

        //Then
        final CASResult casResult = atomicCASResult.get();
        assertThat(casResult).isNotNull();
        assertThat(casResult.operation()).isEqualTo(UPDATE);
        assertThat(casResult.currentValues()).isEqualTo(expectedCurrentValues);

    }
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    }

    @Test
    public void should_notify_listener_when_cas_error_on_native_query() throws Exception {
        //Given
        final AtomicReference<CASResult> atomicCASResult = new AtomicReference(null);
        CASResultListener listener = new CASResultListener() {
            @Override
            public void onCASSuccess() {
            }

            @Override
            public void onCASError(CASResult casResult) {
                atomicCASResult.compareAndSet(null, casResult);
            }
        };
        Map<String, Object> expectedCurrentValues = ImmutableMap.<String, Object>of("[applied]", false, "name", "John");

        CompleteBean entity = builder().randomId().name("John").buid();
        manager.insert(entity);

        final RegularStatement statement = update("CompleteBean").with(set("name","Helen"))
                .where(eq("id",entity.getId())).onlyIf(eq("name","Andrew"));

        //When
        final NativeQuery nativeQuery = manager.nativeQuery(statement,casResultListener(listener));
        nativeQuery.execute();

        //Then
        final CASResult casResult = atomicCASResult.get();

        assertThat(casResult).isNotNull();
        assertThat(casResult.operation()).isEqualTo(UPDATE);
        assertThat(casResult.currentValues()).isEqualTo(expectedCurrentValues);
    }
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