Example usage for java.util.concurrent Callable Callable

List of usage examples for java.util.concurrent Callable Callable

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Introduction

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

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Callable

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Usage

From source file:com.google.wave.api.robot.HttpRobotConnection.java

@Override
public ListenableFuture<String> asyncPostJson(final String url, final String body) {
    return JdkFutureAdapters.listenInPoolThread(executor.submit(new Callable<String>() {
        @Override/*from w  w w  . j  a  v a  2s.co m*/
        public String call() throws RobotConnectionException {
            return postJson(url, body);
        }
    }));
}

From source file:com.microsoft.azure.management.resources.ResourceProviderOperationDetailsOperationsImpl.java

/**
* Gets a list of resource providers./*  www  .j  a  v a  2 s.  com*/
*
* @param identity Required. Resource identity.
* @return List of resource provider operations.
*/
@Override
public Future<ResourceProviderOperationDetailListResult> listAsync(final ResourceIdentity identity) {
    return this.getClient().getExecutorService()
            .submit(new Callable<ResourceProviderOperationDetailListResult>() {
                @Override
                public ResourceProviderOperationDetailListResult call() throws Exception {
                    return list(identity);
                }
            });
}

From source file:org.apache.brooklyn.entity.brooklynnode.SelectMasterEffectorTest.java

@BeforeMethod(alwaysRun = true)
public void setUp() throws Exception {
    super.setUp();

    // because the effector calls wait for a state change, use a separate thread to drive that 
    poller = new Poller<Void>((EntityLocal) app, false);
    poller.scheduleAtFixedRate(new Callable<Void>() {
        @Override/*from w ww.j  av  a  2s .  c o m*/
        public Void call() throws Exception {
            masterFailoverIfNeeded();
            return null;
        }
    }, new DelegatingPollHandler<Void>(Collections.<AttributePollHandler<? super Void>>emptyList()),
            Duration.millis(20));
    poller.start();
}

From source file:cherry.foundation.mail.SendMailBatchTest.java

@Test
public void testMailSendException() throws Exception {

    final File shutdownTrigger = new File("./shutdownTrigger.txt");
    shutdownTrigger.deleteOnExit();//  w w w .ja  v  a2s.  com
    Callable<Boolean> callable = new Callable<Boolean>() {
        @Override
        public Boolean call() {
            try (FileOutputStream os = new FileOutputStream(shutdownTrigger)) {
                return true;
            } catch (IOException ex) {
                return false;
            }
        }
    };

    ScheduledExecutorService service = Executors.newScheduledThreadPool(1);
    ScheduledFuture<Boolean> future = service.schedule(callable, 5L, TimeUnit.SECONDS);

    SendMailBatch batch = create(1000L, shutdownTrigger, true);
    ExitStatus status = batch.execute();

    assertEquals(ExitStatus.NORMAL, status);
    assertTrue(future.get().booleanValue());
    assertFalse(shutdownTrigger.exists());

    verify(bizDateTime, atLeastOnce()).now();
    verify(mailSendHandler, atLeastOnce()).listMessage((LocalDateTime) eq(null));
    verify(mailSendHandler, atLeastOnce()).sendMessage(eq(1L));
    verify(mailSendHandler, never()).sendMessage(eq(2L));
    verify(mailSendHandler, never()).sendMessage(eq(3L));
}

From source file:aos.camel.JavaFutureTest.java

@Test
public void testFutureWithoutDone() throws Exception {
    // this is the task we want to execute async
    // usually the task is something that takes
    // some time to do
    Callable<String> task = new Callable<String>() {
        public String call() throws Exception {
            // do something that takes some time
            LOG.info("Starting to process task");
            Thread.sleep(5000);//  w w w. j a v  a2 s .  c o m
            LOG.info("Task is now done");
            return "Camel rocks";
        }
    };

    // this is the thread pool we will use
    ExecutorService executor = Executors.newCachedThreadPool();

    // now submit the task to the thread pool
    // and get the Future handle back so we can later get the result
    LOG.info("Submitting task to ExecutorService");
    Future<String> future = executor.submit(task);
    LOG.info("Task submitted and we got a Future handle");

    // instead of testing when we are done we can just get
    // the result and it will automatic wait until the task is done
    String answer = future.get();
    LOG.info("The answer is: " + answer);
}

From source file:com.laudandjolynn.mytv.proxy.MyTvProxyManager.java

public void prepareProxies(ProxyProvider... providers) {
    int length = providers == null ? 0 : providers.length;
    if (length > 0) {
        int maxThreadNum = Constant.CPU_PROCESSOR_NUM;
        ThreadFactory threadFactory = new BasicThreadFactory.Builder().namingPattern("MyTv_Find_Proxies_%d")
                .build();//from w  ww  . java 2  s  .c  o m
        ExecutorService executorService = Executors
                .newFixedThreadPool(length > maxThreadNum ? maxThreadNum : length, threadFactory);
        CompletionService<List<Proxy>> completionService = new ExecutorCompletionService<List<Proxy>>(
                executorService);
        providerList.clear();
        for (int i = 0; i < length; i++) {
            final ProxyProvider provider = providers[i];
            providerList.add(provider);
            completionService.submit(new Callable<List<Proxy>>() {

                @Override
                public List<Proxy> call() throws Exception {
                    return provider.getProxies();
                }
            });
        }
        executorService.shutdown();

        int count = 0;
        List<Proxy> resultList = new ArrayList<Proxy>();
        while (count < length) {
            try {
                Future<List<Proxy>> future = completionService.take();
                List<Proxy> proxies = future.get();
                if (proxies != null) {
                    resultList.addAll(proxies);
                }
            } catch (InterruptedException e) {
                logger.error("get proxies thread has interrupted.", e);
            } catch (ExecutionException e) {
                logger.error("get proxies thread has execution fail.", e);
            }
            count++;
        }
        resultList.add(LOCALHOST_PROXY);
        PROXY_QUEUE.clear();
        PROXY_QUEUE.addAll(resultList);
    }
}

From source file:org.apache.brooklyn.entity.brooklynnode.BrooklynEntityMirrorImpl.java

protected void connectSensorsAsync() {
    Callable<Void> asyncTask = new Callable<Void>() {
        @Override//from w  ww . j av  a 2s.c  om
        public Void call() throws Exception {
            //blocks until available (could be a task)
            String mirroredEntityUrl = getConfig(MIRRORED_ENTITY_URL);
            Preconditions.checkNotNull(mirroredEntityUrl, "Required config: " + MIRRORED_ENTITY_URL);

            connectSensors(mirroredEntityUrl);
            return null;
        }
    };

    DynamicTasks
            .queueIfPossible(
                    Tasks.<Void>builder().displayName("Start entity mirror feed").body(asyncTask).build())
            .orSubmitAsync(this);
}

From source file:com.ibm.stocator.fs.swift.SwiftOutputStream.java

/**
 * Default constructor/*from   ww  w.j a v a  2 s .  c o  m*/
 *
 * @param account JOSS account object
 * @param url URL connection
 * @param contentType content type
 * @param metadata input metadata
 * @param connectionManager SwiftConnectionManager
 * @throws IOException if error
 */
public SwiftOutputStream(JossAccount account, URL url, final String contentType, Map<String, String> metadata,
        SwiftConnectionManager connectionManager) throws IOException {
    mUrl = url;
    totalWritten = 0;
    mAccount = account;
    client = connectionManager.createHttpConnection();
    request = new HttpPut(mUrl.toString());
    request.addHeader("X-Auth-Token", account.getAuthToken());
    if (metadata != null && !metadata.isEmpty()) {
        for (Map.Entry<String, String> entry : metadata.entrySet()) {
            request.addHeader("X-Object-Meta-" + entry.getKey(), entry.getValue());
        }
    }

    PipedOutputStream out = new PipedOutputStream();
    final PipedInputStream in = new PipedInputStream();
    out.connect(in);
    execService = Executors.newFixedThreadPool(Runtime.getRuntime().availableProcessors());
    mOutputStream = out;
    Callable<Void> task = new Callable<Void>() {
        @Override
        public Void call() throws Exception {
            InputStreamEntity entity = new InputStreamEntity(in, -1);
            entity.setChunked(true);
            entity.setContentType(contentType);
            request.setEntity(entity);

            LOG.debug("HTTP PUT request {}", mUrl.toString());
            HttpResponse response = client.execute(request);
            int responseCode = response.getStatusLine().getStatusCode();
            LOG.debug("HTTP PUT response {}. Response code {}", mUrl.toString(), responseCode);
            if (responseCode == 401) { // Unauthorized error
                mAccount.authenticate();
                request.removeHeaders("X-Auth-Token");
                request.addHeader("X-Auth-Token", mAccount.getAuthToken());
                LOG.warn("Token recreated for {}.  Retry request", mUrl.toString());
                response = client.execute(request);
                responseCode = response.getStatusLine().getStatusCode();
            }
            if (responseCode >= 400) { // Code may have changed from retrying
                throw new IOException("HTTP Error: " + responseCode + " Reason: "
                        + response.getStatusLine().getReasonPhrase());
            }

            return null;
        }
    };
    futureTask = execService.submit(task);
}

From source file:com.btoddb.chronicle.plunkers.FilePlunkerImpl.java

PrintWriter retrievePrintWriter(final String fn) {
    try {/*from  www  .j  a  va  2 s. c o  m*/
        return printWriterCache.get(fn, new Callable<PrintWriter>() {
            @Override
            public PrintWriter call() throws IOException {
                File f = new File(fn);
                FileUtils.forceMkdir(f.getParentFile());
                return new PrintWriter(new FileWriter(f));
            }
        });
    } catch (ExecutionException e) {
        Utils.logAndThrow(logger, "exception while trying to retrieve PrintWriter from cache", e);
        return null;
    }
}

From source file:apiserver.services.images.controllers.info.MetadataController.java

/**
 * get embedded metadata//  w  w w  .  j  a va 2 s .co  m
 *
 * @param documentId
 * @return height, width
 */
@ApiOperation(value = "Get the embedded metadata", response = Map.class)
@RequestMapping(value = "/info/{documentId}/metadata", method = { RequestMethod.GET })
public WebAsyncTask<Map> imageMetadataByImage(
        @ApiParam(name = "documentId", required = true, defaultValue = "8D981024-A297-4169-8603-E503CC38EEDA") @PathVariable(value = "documentId") String documentId) {
    final String _documentId = documentId;

    Callable<Map> callable = new Callable<Map>() {
        @Override
        public Map call() throws Exception {
            FileMetadataJob args = new FileMetadataJob();
            args.setDocumentId(_documentId);

            Future<Map> imageFuture = imageMetadataGateway.getMetadata(args);
            FileMetadataJob payload = (FileMetadataJob) imageFuture.get(defaultTimeout, TimeUnit.MILLISECONDS);

            return payload.getMetadata();
        }
    };

    return new WebAsyncTask<Map>(defaultTimeout, callable);
}