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.netflix.curator.framework.recipes.shared.TestSharedCount.java

@Test
public void testMultiClients() throws Exception {
    final int CLIENT_QTY = 5;

    List<Future<List<Integer>>> futures = Lists.newArrayList();
    final List<CuratorFramework> clients = new CopyOnWriteArrayList<CuratorFramework>();
    try {//from  w  ww  . ja v a 2s.  c  o m
        final CountDownLatch startLatch = new CountDownLatch(CLIENT_QTY);
        final Semaphore semaphore = new Semaphore(0);
        ExecutorService service = Executors
                .newCachedThreadPool(new ThreadFactoryBuilder().setNameFormat("Test-%d").build());
        for (int i = 0; i < CLIENT_QTY; ++i) {
            Future<List<Integer>> future = service.submit(new Callable<List<Integer>>() {
                @Override
                public List<Integer> call() throws Exception {
                    final List<Integer> countList = Lists.newArrayList();
                    CuratorFramework client = CuratorFrameworkFactory.newClient(server.getConnectString(),
                            new RetryOneTime(1));
                    clients.add(client);
                    client.start();

                    SharedCount count = new SharedCount(client, "/count", 10);

                    final CountDownLatch latch = new CountDownLatch(1);
                    count.addListener(new SharedCountListener() {
                        @Override
                        public void countHasChanged(SharedCountReader sharedCount, int newCount)
                                throws Exception {
                            if (newCount < 0) {
                                latch.countDown();
                            } else {
                                countList.add(newCount);
                            }

                            semaphore.release();
                        }

                        @Override
                        public void stateChanged(CuratorFramework client, ConnectionState newState) {
                        }
                    });
                    count.start();
                    startLatch.countDown();
                    latch.await();
                    return countList;
                }
            });
            futures.add(future);
        }

        CuratorFramework client = CuratorFrameworkFactory.newClient(server.getConnectString(),
                new RetryOneTime(1));
        clients.add(client);
        client.start();

        Assert.assertTrue(startLatch.await(10, TimeUnit.SECONDS));

        SharedCount count = new SharedCount(client, "/count", 10);
        count.start();

        List<Integer> countList = Lists.newArrayList();
        Random random = new Random();
        for (int i = 0; i < 100; ++i) {
            Thread.sleep(random.nextInt(10));

            int next = random.nextInt(100);
            countList.add(next);
            count.setCount(next);

            Assert.assertTrue(semaphore.tryAcquire(CLIENT_QTY, 10, TimeUnit.SECONDS));
        }
        count.setCount(-1);

        for (Future<List<Integer>> future : futures) {
            List<Integer> thisCountList = future.get();
            Assert.assertEquals(thisCountList, countList);
        }
    } finally {
        for (CuratorFramework client : clients) {
            IOUtils.closeQuietly(client);
        }
    }
}

From source file:com.alibaba.cobar.client.merger.ConcurrentSortMerger.java

public List<E> merge(List<List<E>> entities) {
    List<E> resultList = new ArrayList<E>();
    if (CollectionUtils.isNotEmpty(entities)) {
        if (entities.size() == 1) {
            resultList.addAll(entities.get(0));
        } else {/*from  w ww.  java 2  s  .  c  o  m*/
            List<List<E>> partialResult = new ArrayList<List<E>>();
            int pairs = entities.size() / 2;
            List<Future<List<E>>> futures = new ArrayList<Future<List<E>>>();

            for (int i = 0; i < pairs; i++) {
                final List<E> llst = entities.get(i * 2);
                final List<E> rlst = entities.get(i * 2 + 1);
                futures.add(getExecutor().submit(new Callable<List<E>>() {
                    public List<E> call() throws Exception {
                        return partialSortMerge(llst, rlst);
                    }
                }));
            }

            for (Future<List<E>> f : futures) {
                try {
                    partialResult.add(f.get());
                } catch (InterruptedException e) {
                    e.printStackTrace();
                } catch (ExecutionException e) {
                    e.printStackTrace();
                }
            }

            if (entities.size() % 2 == 1) {
                partialResult.add(entities.get(pairs * 2));
            }

            resultList.addAll(merge(partialResult));
        }
    }
    return resultList;
}

From source file:com.simplymeasured.prognosticator.HiveWriterImpl.java

@Override
public void writeRow(final String tableName, Map<String, Object> entity) throws Exception {
    HCatTable table = tableHandleCache.get(tableName, new Callable<HCatTable>() {
        @Override/*from w w w.  j  a v a 2s.  c  om*/
        public HCatTable call() throws Exception {
            return hcatClient.getTable("default", tableName);
        }
    });

    String hbaseTableName = HiveUtils.getTableName(table);

    HTableInterface tableInterface = new HTable(hbaseConfiguration, tableName);
    tableInterface.setAutoFlush(true);

    Serializer serializer = new Serializer(table);

    try {
        List<HCatFieldSchema> columns = table.getCols();

        HCatFieldSchema keyColumn = columns.get(0);

        Put put;

        final byte[] rowkey;

        final List<String> keyRequiredColumns = Lists.newArrayList();

        if (keyColumn.getType() == HCatFieldSchema.Type.STRUCT) {
            HCatSchema keySchema = keyColumn.getStructSubSchema();

            for (HCatFieldSchema fieldSchema : keySchema.getFields()) {
                keyRequiredColumns.add(fieldSchema.getName());
            }

            rowkey = serializer.serializeHiveType(keyColumn, null, entity, 1);
        } else {
            keyRequiredColumns.add(keyColumn.getName());

            rowkey = serializer.serializeHiveType(keyColumn, null, entity.get(keyColumn.getName()), 1);
        }

        if (rowkey == null || rowkey.length == 0) {
            throw new IllegalArgumentException(
                    String.format("Rowkey is null, required key fields missing: %s", keyRequiredColumns));
        }

        put = new Put(rowkey);

        for (int i = 1; i < columns.size(); i++) {
            HCatFieldSchema columnSchema = columns.get(i);

            serializer.serialize(columnSchema, i, put, entity.get(columnSchema.getName()), 1);
        }

        tableInterface.put(put);
    } finally {
        tableInterface.close();
    }
}

From source file:com.fengduo.bee.service.impl.message.MailServiceImpl.java

/**
 * curl -d 'appid=10490&to=zxc<zhangxiongcai337@163.com> &subject=testing
 * Subject&text=testing text/*w w  w  .  jav a  2s .c  o  m*/
 * body&from=zhangxiongcai@fengduo.co&signature=85817
 * b65c1443263c31bf1215fac7c1a' https://api.submail.cn/mail/send.json
 */
@Override
public boolean sendTxtMail(final String toMember, final String subject, final String text) {
    if (StringUtils.isEmpty(toMember)) {
        logger.error("?!??");
        return false;
    }
    if (StringUtils.isEmpty(subject)) {
        logger.error("!??");
        return false;
    }
    if (StringUtils.isEmpty(text)) {
        logger.error("!??");
        return false;
    }
    Future<Boolean> future = executor.submit(new Callable<Boolean>() {

        @Override
        public Boolean call() throws Exception {
            return sendMail(toMember, subject, text);
        }

    });
    try {
        return future.get();
    } catch (InterruptedException | ExecutionException e) {
        e.printStackTrace();
    }
    return false;
}

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

@RequestMapping(method = RequestMethod.OPTIONS)
public Callable<ResponseEntity<Entity>> options(final OptionsResponseBuilder<Entity> builder) {

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

        @Override/*from  ww  w .j a v a 2s.com*/
        public ResponseEntity<Entity> call() throws Exception {
            return builder.allow(HttpMethod.GET, HttpMethod.HEAD).entity(new Entity("foo")).build();
        }
    };
}

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

public Future<String> asStringAsync() throws IOException {
    return ctx.threadPool.submit(new Callable<String>() {
        @Override/*from  w  w  w  .j  a va  2s  .co  m*/
        public String call() throws Exception {
            return asString();
        }
    });
}

From source file:at.beris.virtualfile.client.ftp.FtpClient.java

@Override
public void disconnect() throws IOException {
    LOGGER.info("Disconnecting from " + username() + "@" + host() + ":" + String.valueOf(port()));
    executionHandler(new Callable<Void>() {
        @Override/*w ww  . j  av a 2s.  com*/
        public Void call() throws Exception {
            reconnect = false;
            if (ftpClient.isConnected()) {
                ftpClient.logout();
                ftpClient.disconnect();
            }
            return null;
        }
    });
}

From source file:no.uis.fsws.proxy.StudinfoProxyImpl.java

@Override
public List<Studieprogram> getStudieprogrammerForOrgenhet(final XMLGregorianCalendar arstall,
        final Terminkode terminkode, final Sprakkode sprak, final int institusjonsnr, final Integer fakultetsnr,
        final Integer instituttnr, final Integer gruppenr, final boolean medUPinfo) {
    final StudInfoImport svc = getServiceForPrincipal();

    try {/*from  w ww . j  a  v  a  2  s  . c  om*/
        Future<List<Studieprogram>> future = executor.submit(new Callable<List<Studieprogram>>() {

            @Override
            public List<Studieprogram> call() throws Exception {
                final FsStudieinfo sinfo = svc.fetchStudyPrograms(institusjonsnr,
                        fakultetsnr != null ? fakultetsnr : -1, arstall.getYear(), terminkode.toString(),
                        medUPinfo, sprak.toString());
                return sinfo.getStudieprogram();
            }
        });

        return future.get(timeoutMinutes, TimeUnit.MINUTES);
    } catch (ExecutionException | InterruptedException | TimeoutException e) {
        throw new RuntimeException(e);
    }
}

From source file:edu.scripps.fl.pubchem.EUtilsFactory.java

public Callable<InputStream> getInputStream(final String url, final Object... params) throws IOException {
    return new Callable<InputStream>() {
        public InputStream call() throws Exception {
            StringBuffer sb = new StringBuffer();
            sb.append(url).append("?");
            PostMethod post = new PostMethod(url);
            List<NameValuePair> data = new ArrayList<NameValuePair>();
            data.add(new NameValuePair("tool", EUtilsFactory.this.tool));
            data.add(new NameValuePair("email", EUtilsFactory.this.email));
            for (int ii = 0; ii < params.length; ii += 2) {
                String name = params[ii].toString();
                String value = "";
                if ((ii + 1) < params.length)
                    value = params[ii + 1].toString();
                data.add(new NameValuePair(name, value));
                sb.append(name).append("=").append(value).append("&");
            }/*from  www.  jav a 2  s . c  o m*/
            post.setRequestBody(data.toArray(new NameValuePair[0]));
            HttpClient httpclient = new HttpClient();
            int result = httpclient.executeMethod(post);
            //            log.debug("Fetching from: " + url + StringUtils.join(params, " "));
            log.debug("Fetching from: " + sb);
            InputStream in = post.getResponseBodyAsStream();
            return in;
        }
    };
}

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

@Override
public ListenableFuture<String> asyncGet(final String url) {
    return JdkFutureAdapters.listenInPoolThread(executor.submit(new Callable<String>() {
        @Override//w w  w.  j  a va2s. c o m
        public String call() throws RobotConnectionException {
            return get(url);
        }
    }));
}