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.parse.FileObjectStore.java

@Override
public Task<Boolean> existsAsync() {
    return Task.call(new Callable<Boolean>() {
        @Override//from   w  ww .  jav  a  2  s .c o  m
        public Boolean call() throws Exception {
            return file.exists();
        }
    }, ParseExecutors.io());
}

From source file:net.eusashead.hateoas.response.argumentresolver.AsyncEntityController.java

@RequestMapping(method = RequestMethod.DELETE)
public Callable<ResponseEntity<Void>> delete(@PathVariable final String name,
        final DeleteResponseBuilder builder) {

    return new Callable<ResponseEntity<Void>>() {

        @Override//w w w.j a v  a2  s.c o  m
        public ResponseEntity<Void> call() throws Exception {
            service.delete(name);
            return builder.build();
        }
    };
}

From source file:pt.webdetails.cpf.messaging.BeanyPluginCall.java

Callable<String> asCallable(final Map<String, String[]> parameters) {
    return new Callable<String>() {
        public String call() throws Exception {
            return BeanyPluginCall.this.call(parameters);
        }//from   w  w w  .  ja  v  a2 s .  c o  m
    };
}

From source file:com.googlecode.concurrentlinkedhashmap.MultiThreadedTest.java

@Test(dataProvider = "builder")
public void concurrency(Builder<Integer, Integer> builder) {
    List<Integer> keys = newArrayList();
    Random random = new Random();
    for (int i = 0; i < iterations; i++) {
        keys.add(random.nextInt(iterations / 100));
    }/*from  www . j a  va 2  s  . c  o  m*/
    final List<List<Integer>> sets = shuffle(threads, keys);
    final ConcurrentLinkedHashMap<Integer, Integer> map = builder.maximumWeightedCapacity(capacity())
            .concurrencyLevel(threads).build();
    executeWithTimeOut(map, new Callable<Long>() {
        @Override
        public Long call() throws Exception {
            return timeTasks(threads, new Thrasher(map, sets));
        }
    });
}

From source file:com.linkedin.pinot.common.http.MultiGetRequest.java

/**
 * GET urls in parallel using the executor service.
 * @param urls absolute URLs to GET//  w  w w  . j  a  v a 2  s. co  m
 * @param timeoutMs timeout in milliseconds for each GET request
 * @return instance of CompletionService. Completion service will provide
 *   results as they arrive. The order is NOT same as the order of URLs
 */
public CompletionService<GetMethod> execute(@Nonnull List<String> urls, final int timeoutMs) {
    Preconditions.checkNotNull(urls);
    Preconditions.checkArgument(timeoutMs > 0, "Timeout value for multi-get must be greater than 0");

    CompletionService<GetMethod> completionService = new ExecutorCompletionService<>(executor);
    for (final String url : urls) {
        completionService.submit(new Callable<GetMethod>() {
            @Override
            public GetMethod call() throws Exception {
                HttpClient client = new HttpClient(connectionManager);
                GetMethod getMethod = new GetMethod(url);
                getMethod.getParams().setSoTimeout(timeoutMs);
                // if all connections in the connection manager are busy this will wait to retrieve a connection
                // set time to wait to retrieve a connection from connection manager
                client.getParams().setConnectionManagerTimeout(timeoutMs);
                client.executeMethod(getMethod);
                return getMethod;
            }
        });
    }
    return completionService;
}

From source file:com.microsoft.azure.management.sql.ServiceObjectiveOperationsImpl.java

/**
* Returns information about an Azure SQL Database Server Service Objectives.
*
* @param resourceGroupName Required. The name of the Resource Group to
* which the server belongs./*  w w w. j  a va2  s.  c om*/
* @param serverName Required. The name of the Server.
* @param serviceObjectiveName Required. The name of the service objective
* to retrieve.
* @return Represents the response to a Get Azure Sql Database Service
* Objective request.
*/
@Override
public Future<ServiceObjectiveGetResponse> getAsync(final String resourceGroupName, final String serverName,
        final String serviceObjectiveName) {
    return this.getClient().getExecutorService().submit(new Callable<ServiceObjectiveGetResponse>() {
        @Override
        public ServiceObjectiveGetResponse call() throws Exception {
            return get(resourceGroupName, serverName, serviceObjectiveName);
        }
    });
}

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

/**
 * get basic info about image./*w  w w. ja  va 2s . c  o m*/
 *
 * @param documentId cache id
 * @return height, width, pixel size, transparency
 * , @RequestPart("meta-data") Object metadata
 * <p/>
 * , @RequestParam MultipartFile file
 */
@ApiOperation(value = "Get the height and width for the image", response = Map.class)
@RequestMapping(value = "/info/{documentId}/size", method = { RequestMethod.GET })
public WebAsyncTask<ResponseEntity<Map>> imageInfoByImageAsync(
        @ApiParam(name = "documentId", required = true, defaultValue = "8D981024-A297-4169-8603-E503CC38EEDA") @PathVariable(value = "documentId") String documentId)
        throws ExecutionException, TimeoutException, InterruptedException {
    final String _documentId = documentId;

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

            Future<Map> imageFuture = gateway.imageSize(args);
            Map payload = imageFuture.get(defaultTimeout, TimeUnit.MILLISECONDS);

            HttpHeaders headers = new HttpHeaders();
            headers.setContentType(MediaType.APPLICATION_JSON);
            ResponseEntity<Map> result = new ResponseEntity<Map>(payload, headers, HttpStatus.OK);
            return result;
        }
    };

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

From source file:edu.cornell.med.icb.R.RUtils.java

/**
 * Can be used to start a rserve instance.
 * @param threadPool The ExecutorService used to start the Rserve process
 * @param rServeCommand Full path to command used to start Rserve process
 * @param host Host where the command should be sent
 * @param port Port number where the command should be sent
 * @param username Username to send to the server if authentication is required
 * @param password Password to send to the server if authentication is required
 * @return The return value from the Rserve instance
 *//*from  w w w .j  a  va2 s  .  c  om*/
static Future<Integer> startup(final ExecutorService threadPool, final String rServeCommand, final String host,
        final int port, final String username, final String password) {
    if (LOG.isInfoEnabled()) {
        LOG.info("Attempting to start Rserve on " + host + ":" + port);
    }

    return threadPool.submit(new Callable<Integer>() {
        public Integer call() throws IOException {
            final List<String> commands = new ArrayList<String>();

            // if the host is not local, use ssh to exec the command
            if (!"localhost".equals(host) && !"127.0.0.1".equals(host)
                    && !InetAddress.getLocalHost().equals(InetAddress.getByName(host))) {
                commands.add("ssh");
                commands.add(host);
            }

            // TODO - this will fail when spaces are in the the path to the executable
            CollectionUtils.addAll(commands, rServeCommand.split(" "));
            commands.add("--RS-port");
            commands.add(Integer.toString(port));

            final String[] command = commands.toArray(new String[commands.size()]);
            LOG.debug(ArrayUtils.toString(commands));

            final ProcessBuilder builder = new ProcessBuilder(command);
            builder.redirectErrorStream(true);
            final Process process = builder.start();
            BufferedReader br = null;
            try {
                final InputStream is = process.getInputStream();
                final InputStreamReader isr = new InputStreamReader(is);
                br = new BufferedReader(isr);
                String line;
                while ((line = br.readLine()) != null) {
                    if (LOG.isDebugEnabled()) {
                        LOG.debug(host + ":" + port + "> " + line);
                    }
                }

                process.waitFor();
                if (LOG.isInfoEnabled()) {
                    LOG.info("Rserve on " + host + ":" + port + " terminated");
                }
            } catch (InterruptedException e) {
                LOG.error("Interrupted!", e);
                process.destroy();
                Thread.currentThread().interrupt();
            } finally {
                IOUtils.closeQuietly(br);
            }

            final int exitValue = process.exitValue();
            if (LOG.isInfoEnabled()) {
                LOG.info("Rserve on " + host + ":" + port + " returned " + exitValue);
            }
            return exitValue;
        }
    });
}

From source file:com.microsoft.windowsazure.management.sql.ServiceObjectiveOperationsImpl.java

/**
* Returns information about a certain Service Objective with a specific Id.
*
* @param serverName Required. The name of the Azure SQL Database Server to
* be queried./* ww  w. j a va  2 s  .co  m*/
* @param serviceObjectiveId Required. The Id of the Service Objective to be
* obtained.
* @return Response containing the service objective for a given Azure SQL
* Database Server with matching service objective Id.
*/
@Override
public Future<ServiceObjectiveGetResponse> getAsync(final String serverName, final String serviceObjectiveId) {
    return this.getClient().getExecutorService().submit(new Callable<ServiceObjectiveGetResponse>() {
        @Override
        public ServiceObjectiveGetResponse call() throws Exception {
            return get(serverName, serviceObjectiveId);
        }
    });
}

From source file:io.druid.metadata.SQLMetadataConnector.java

public <T> T retryWithHandle(final HandleCallback<T> callback) {
    final Callable<T> call = new Callable<T>() {
        @Override/*ww  w .  jav a2s  .  c o m*/
        public T call() throws Exception {
            return getDBI().withHandle(callback);
        }
    };
    final int maxTries = 10;
    try {
        return RetryUtils.retry(call, shouldRetry, maxTries);
    } catch (Exception e) {
        throw Throwables.propagate(e);
    }
}