Example usage for java.util.concurrent Callable Callable

Introduction

In this page you can find the example usage for java.util.concurrent Callable Callable.

Prototype

Callable

Source Link

Usage

From source file:de.appsolve.padelcampus.utils.HtmlResourceUtil.java

public void updateCss(final ServletContext context) throws Exception {
    List<Customer> customers = customerDAO.findAll();
    if (customers.isEmpty()) {
        applyCustomerCss(context, getDefaultCssAttributes(), "");
    } else {//  w w  w .  ja v a  2  s  .co m
        lessCompiler = new LessCompiler();
        lessCompiler.init();
        int availableProcessors = Runtime.getRuntime().availableProcessors();
        LOG.info(String.format("Compiling lesscss with %s cores", availableProcessors));
        ExecutorService executor = Executors.newFixedThreadPool(availableProcessors);
        List<FutureTask<Void>> taskList = new ArrayList<>();

        for (final Customer customer : customers) {
            FutureTask<Void> futureTask = new FutureTask<>(new Callable<Void>() {
                @Override
                public Void call() throws Exception {
                    try {
                        updateCss(context, customer);
                    } catch (Exception ex) {
                        LOG.error(ex, ex);
                    }
                    return null;
                }
            });
            taskList.add(futureTask);
            executor.execute(futureTask);
        }
        for (FutureTask task : taskList) {
            task.get();
        }
        executor.shutdown();
    }
}

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From source file:org.soyatec.windowsazure.table.internal.TableStorageRest.java

/**
 * Lists the table within the account//from   w  ww  .  java 2 s .c o  m
 *
 * @param nextTableName
 *            Table prefix
 * @return List of table names
 */
private ListTableResult listTablesImpl(final String nextTableName) {

    final OutParameter<ListTableResult> result = new OutParameter<ListTableResult>();
    getRetryPolicy().execute(new Callable<Object>() {
        public Object call() throws Exception {
            NameValueCollection queryParams = new NameValueCollection();
            if (!Utilities.isNullOrEmpty(nextTableName)) {
                queryParams.put(QueryParams.QueryParamTableNextName, nextTableName);
            }
            ResourceUriComponents uriComponents = new ResourceUriComponents(getAccountName(),
                    TableStorageConstants.TablesQuery, null);
            URI uri = HttpUtilities.createRequestUri(getBaseUri(), isUsePathStyleUris(), getAccountName(),
                    TableStorageConstants.TablesQuery, null, getTimeout(), queryParams, uriComponents);

            HttpRequest request = HttpUtilities.createHttpRequest(uri, HttpMethod.Get);

            getCredentials().signRequestForSharedKeyLite(request, uriComponents);

            HttpWebResponse response = HttpUtilities.getResponse(request);
            if (response.getStatusCode() == HttpStatus.SC_OK) {
                ListTableResult tablesResult = getTableResultFromResponse(response.getStream());
                result.setValue(tablesResult);
                String nextTableNameHeader = response.getHeader(HeaderNames.TableStorageNextTableName);
                if (!Utilities.isNullOrEmpty(nextTableNameHeader)) {
                    tablesResult.setNextTableName(nextTableNameHeader);
                }
                response.close();
            } else {
                HttpUtilities.processUnexpectedStatusCode(response);
            }
            return null;
        }
    });
    return result.getValue();
}

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From source file:com.vsct.dt.hesperides.indexation.ElasticSearchIndexationExecutor.java

public <T> Future<Void> index(final ElasticSearchIndexationCommand task) {
    return singleThreadPool.submit(new Callable<Void>() {
        @Override/*from   www  .  j  ava  2 s.  com*/
        public Void call() {
            withMaxRetry(nRetries, waitBeforeRetryMs, t -> t.index(elasticSearchClient));
            return null;
        }

        private void withMaxRetry(final int maxRetry, final int wait,
                final Consumer<ElasticSearchIndexationCommand> consumer) {
            int count = 1;
            for (;;) {
                try {
                    consumer.accept(task);
                    return;
                } catch (Exception e) {
                    if (count < maxRetry) {
                        LOGGER.warn("Indexation task failed. Retry in {} milliseconds", wait);
                        try {
                            Thread.sleep(wait);
                        } catch (final InterruptedException ie) {
                            ie.printStackTrace();
                        }
                        count++;
                    } else {
                        LOGGER.error(
                                "Indexation task failed after {} attempts. Index might be broken. Reason: {} {}",
                                nRetries, e, e.getMessage());
                        return;
                    }
                }
            }
        }

    });
}

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From source file:com.glaf.core.resource.ResourceFactory.java

public static byte[] getData(final String region, final String key) {
    if (conf.getBoolean(DISTRIBUTED_ENABLED, false)) {
        String regionName = Environment.getCurrentSystemName() + "_res_" + region;
        String complexKey = Environment.getCurrentSystemName() + "_res_" + key;
        if (SystemProperties.getDeploymentSystemName() != null) {
            regionName = SystemProperties.getDeploymentSystemName() + "_" + Environment.getCurrentSystemName()
                    + "_res_" + region;
        }/*from   www . jav  a  2  s. c om*/
        if (SystemProperties.getDeploymentSystemName() != null) {
            complexKey = SystemProperties.getDeploymentSystemName() + "_" + Environment.getCurrentSystemName()
                    + "_res_" + key;
        }
        final String regionName2 = regionName;
        final String complexKey2 = complexKey;

        boolean waitFor = true;
        Callable<byte[]> task = new Callable<byte[]>() {
            @Override
            public byte[] call() throws Exception {
                return channel.getData(regionName2, complexKey2);
            }
        };
        try {
            Future<byte[]> result = pool.submit(task);
            long start = System.currentTimeMillis();
            // ?
            if (waitFor) {
                while (true) {
                    if (System.currentTimeMillis() - start > 2000) {
                        break;
                    }
                    if (result.isDone()) {
                        return result.get();
                    }
                }
            }
        } catch (Exception ex) {
            ex.printStackTrace();
            logger.error(ex);
        }
    }
    return null;
}

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From source file:io.fabric8.elasticsearch.plugin.PluginClient.java

public void deleteDocument(String index, String type, String id) {
    execute(new Callable<Object>() {

        @Override//  ww  w .  j av a 2  s .  co m
        public Object call() throws Exception {
            LOGGER.debug("Deleted document: '{}/{}/{}'", index, type, id);
            DeleteResponse response = client.prepareDelete(index, type, id).get();
            if (LOGGER.isDebugEnabled()) {
                LOGGER.debug("Document deleted: '{}'", response.status());
            }
            return null;
        }

    });
}

---

From source file:com.netflix.curator.framework.recipes.atomic.TestDistributedAtomicLong.java

@Test
public void testForceSet() throws Exception {
    CuratorFramework client = CuratorFrameworkFactory.newClient(server.getConnectString(), new RetryOneTime(1));
    client.start();//  www .  j a  v  a2 s  . c  o m
    try {
        final DistributedAtomicLong dal = new DistributedAtomicLong(client, "/counter", new RetryOneTime(1));

        ExecutorService executorService = Executors.newFixedThreadPool(2);
        executorService.submit(new Callable<Object>() {
            @Override
            public Object call() throws Exception {
                for (int i = 0; i < 1000; ++i) {
                    dal.increment();
                    Thread.sleep(10);
                }
                return null;
            }
        });
        executorService.submit(new Callable<Object>() {
            @Override
            public Object call() throws Exception {
                for (int i = 0; i < 1000; ++i) {
                    dal.forceSet(0L);
                    Thread.sleep(10);
                }
                return null;
            }
        });

        Assert.assertTrue(dal.get().preValue() < 10);
    } finally {
        client.close();
    }
}

---

From source file:com.rogiel.httpchannel.http.Request.java

public Future<Object> asJsonAsync() throws IOException {
    return ctx.threadPool.submit(new Callable<Object>() {
        @Override/*from w  ww. j av a 2s .  c  o m*/
        public Object call() throws Exception {
            return asJson();
        }
    });
}

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From source file:com.blacklocus.qs.worker.util.log.SamplingQSLogServiceTest.java

@Test
public void testSampledLifeCycle() throws InterruptedException {

    // With these parameters, by far most logger interactions should be filtered out, very few sampled in.
    final int numThreads = 64, iterations = 200, processingJitterMaxMs = 16, noSoonerThanMs = 100;

    final Set<String> sampledTaskIds = Collections.newSetFromMap(new ConcurrentHashMap<String, Boolean>());

    final QSLogService logService = Mockito.mock(QSLogService.class);
    // track which logging interactions were allowed through (sampled in)
    Mockito.doAnswer(new Answer() {
        @Override/*w w w  .java  2s  .  com*/
        public Object answer(InvocationOnMock invocation) throws Throwable {
            sampledTaskIds.add(((QSTaskModel) invocation.getArguments()[0]).taskId);
            return null;
        }
    }).when(logService).startedTask(Matchers.any(QSTaskModel.class));
    Mockito.doAnswer(new Answer() {
        @Override
        public Object answer(InvocationOnMock invocation) throws Throwable {
            sampledTaskIds.add(((QSLogModel) invocation.getArguments()[0]).taskId);
            return null; //TODO jason
        }
    }).when(logService).log(Matchers.any(QSLogModel.class));
    Mockito.doAnswer(new Answer() {
        @Override
        public Object answer(InvocationOnMock invocation) throws Throwable {
            sampledTaskIds.add(((QSTaskModel) invocation.getArguments()[0]).taskId);
            return null; //TODO jason
        }
    }).when(logService).completedTask(Matchers.any(QSTaskModel.class));

    Predicate<QSTaskModel> taskPredicate = SamplingPredicates.noSoonerThan(noSoonerThanMs,
            TimeUnit.MILLISECONDS);
    final QSLogService sampledLogService = new SamplingQSLogService(logService, taskPredicate);

    long startNs = System.nanoTime();
    ExecutorService threads = Executors.newFixedThreadPool(numThreads);
    for (int i = 0; i < numThreads; i++) {
        threads.submit(new Callable<Void>() {
            @Override
            public Void call() throws Exception {
                LOG.debug("Thread start {}", Thread.currentThread().getName());
                for (int i = 0; i < iterations; i++) {

                    String taskId = UUID.randomUUID().toString();

                    // simulate task processing, some have logs, some don't, processing time varies between each step
                    QSTaskModel task = new QSTaskModel();
                    task.taskId = taskId;
                    Thread.sleep(RandomUtils.nextInt(processingJitterMaxMs));

                    sampledLogService.startedTask(task);
                    Thread.sleep(RandomUtils.nextInt(processingJitterMaxMs));

                    // random number of associated logs [0, 2]
                    for (int j = RandomUtils.nextInt(2); j > 0; j--) {
                        QSLogModel log = new QSLogModel();
                        log.taskId = taskId;
                        sampledLogService.log(log);
                        Thread.sleep(RandomUtils.nextInt(processingJitterMaxMs));
                    }

                    sampledLogService.completedTask(task);
                }
                LOG.debug("Thread end {}", Thread.currentThread().getName());
                return null;

            }
        });
    }
    threads.shutdown();
    threads.awaitTermination(1, TimeUnit.MINUTES);
    long endNs = System.nanoTime();

    // Theoretical maximum number of sampled in task logging
    long durationMs = TimeUnit.NANOSECONDS.toMillis(endNs - startNs);
    long expectedMax = durationMs / noSoonerThanMs + 1; // +1 for time@0: sampled in
    LOG.debug("Run duration: {}ms  no sooner than: {}ms", durationMs, noSoonerThanMs);
    LOG.debug("Expected max sampled in: {}  Actually sampled: {}", expectedMax, sampledTaskIds.size());
    Assert.assertTrue(expectedMax >= sampledTaskIds.size());
}

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From source file:org.jasig.portlet.blackboardvcportlet.dao.impl.ConferenceUserDaoImplTest.java

@Test
public void testCreateAndSearch() throws Exception {
    this.execute(new Callable<Object>() {
        @Override/*from  w  w w  . j a va 2 s.  com*/
        public Object call() {
            final ConferenceUser user1 = conferenceUserDao.createInternalUser("user@example.com");
            user1.setEmail("user@dept.example.com");
            conferenceUserDao.updateUser(user1);

            final ConferenceUser user2 = conferenceUserDao.createInternalUser("admin@example.com");
            user2.setEmail("admin@dept.example.com");
            user2.getAdditionalEmails().add("admin@external.example.com");
            conferenceUserDao.updateUser(user2);

            conferenceUserDao.createExternalUser("New User", "admin@external.example.com");

            return null;
        }
    });
    this.execute(new Callable<Object>() {
        @Override
        public Object call() {
            Set<ConferenceUser> users = conferenceUserDao.getUsersByPrimaryEmail("user@dept.example.com");
            assertNotNull(users);
            assertEquals(1, users.size());

            users = conferenceUserDao.getUsersByAnyEmail("admin@external.example.com");
            assertNotNull(users);
            assertEquals(2, users.size());

            return null;
        }
    });
}

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From source file:com.thinkbiganalytics.spark.repl.SparkScriptEngine.java

@Nonnull
@Override//  w  w w  .j  a v a 2 s  .  c  o  m
protected SparkContext createSparkContext() {
    // Allow interpreter to modify Thread context for Spark
    getInterpreter().setContextClassLoader();

    // The SparkContext ClassLoader is needed during initialization (only for YARN master)
    return executeWithSparkClassLoader(new Callable<SparkContext>() {
        @Override
        public SparkContext call() throws Exception {
            log.info("Creating spark context with spark conf {}", conf);
            return new SparkContext(conf);
        }
    });
}

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