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:io.druid.tests.indexer.AbstractIndexerTest.java

protected void unloadAndKillData(final String dataSource) throws Exception {
    Interval interval = new Interval("2013-01-01T00:00:00.000Z/2013-12-01T00:00:00.000Z");
    coordinator.unloadSegmentsForDataSource(dataSource, interval);
    RetryUtil.retryUntilFalse(new Callable<Boolean>() {
        @Override/*from   ww  w  .  j  a  v  a 2 s .co m*/
        public Boolean call() throws Exception {
            return coordinator.areSegmentsLoaded(dataSource);
        }
    }, "Segment Unloading");
    coordinator.deleteSegmentsDataSource(dataSource, interval);
    RetryUtil.retryUntilTrue(new Callable<Boolean>() {
        @Override
        public Boolean call() throws Exception {
            return (indexer.getPendingTasks().size() + indexer.getRunningTasks().size()
                    + indexer.getWaitingTasks().size()) == 0;
        }
    }, "Waiting for Tasks Completion");
}

---

From source file:Main.java

public TimedFutureTask(final Callable<Object> callable, final int timeoutMS) {
    timedCallable = (new Callable<Object>() {
        @Override/*from   w w  w.  j a v a 2  s . co  m*/
        public Object call() throws Exception {
            cancelTimer = new Timer();
            cancelTimer.schedule(new TimerTask() {
                @Override
                public void run() {
                    f.cancel(true);
                }
            }, timeoutMS);
            final Object res = callable.call();
            cancelTimer.cancel();
            return res;
        }
    });
}

---

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

@Test
public void testEmptyQueries() throws Exception {
    this.execute(new Callable<Object>() {
        @Override//from  www. j  ava2  s. c om
        public Object call() {
            final ServerConfiguration serverConfiguration = serverConfigurationDao.getServerConfiguration();
            assertNull(serverConfiguration);

            return null;
        }
    });
    this.execute(new Callable<Object>() {
        @Override
        public Object call() {
            serverConfigurationDao.deleteServerConfiguration();
            return null;
        }
    });
}

---

From source file:br.com.caelum.vraptor.ioc.spring.SpringProviderRegisteringComponentsTest.java

@Override
protected <T> T executeInsideRequest(final WhatToDo<T> execution) {
    Callable<T> task = new Callable<T>() {
        public T call() throws Exception {
            T result = null;//ww w . j  a  v a2s .c  om
            HttpSessionMock session = new HttpSessionMock(context, "session" + ++counter);
            HttpServletRequestMock httpRequest = new HttpServletRequestMock(session,
                    mock(MutableRequest.class, "request" + counter));
            MutableResponse response = mock(MutableResponse.class, "response" + counter);

            RequestInfo request = new RequestInfo(context, null, httpRequest, response);
            VRaptorRequestHolder.setRequestForCurrentThread(request);

            RequestContextListener contextListener = new RequestContextListener();
            contextListener.requestInitialized(new ServletRequestEvent(context, httpRequest));
            result = execution.execute(request, counter);
            contextListener.requestDestroyed(new ServletRequestEvent(context, httpRequest));

            VRaptorRequestHolder.resetRequestForCurrentThread();
            return result;
        }
    };

    Future<T> future = Executors.newSingleThreadExecutor().submit(task);

    try {
        return future.get(60, TimeUnit.SECONDS);
    } catch (Exception e) {
        throw new RuntimeException(e);
    }
}

---

From source file:com.tesora.dve.mysqlapi.repl.MyReplicationVisitorDispatch.java

public static void executeLDB(ServerDBConnection dbCon, final ChannelHandlerContext channelHandlerContext,
        final byte[] readData) throws SQLException {
    try {/*from w w  w  .  j ava 2  s  .  c o  m*/
        final SSConnection ssCon1 = dbCon.getSSConn();
        Throwable t = ssCon1.executeInContext(new Callable<Throwable>() {
            public Throwable call() {
                try {
                    LoadDataBlockExecutor.executeInsert(channelHandlerContext, ssCon1,
                            LoadDataBlockExecutor.processDataBlock(channelHandlerContext, ssCon1, readData));
                } catch (Throwable e) {
                    return e;
                }
                return null;
            }
        });
        if (t != null && t.getCause() != null) {
            throw new PEException(t);
        }
    } catch (Throwable t) {
        throw new SQLException(t);
    }
}

---

From source file:org.jboss.spring3_2.example.AsyncRequestMapping.mvc.MemberRestController.java

@RequestMapping(value = "/{id}", method = RequestMethod.GET, produces = "application/json")
public @ResponseBody Callable<Member> lookupMemberById(@PathVariable("id") final Long id) {
    return new Callable<Member>() {
        public Member call() {
            try {
                Thread.sleep(2000);
                System.out.println("Returning from AsyncCall");
            } catch (InterruptedException e) {
                e.printStackTrace();/*from   w ww.j  ava 2s. co  m*/
            }
            return memberDao.findById(id);
        }

    };
}

---

From source file:com.bbytes.jfilesync.sync.ftp.FTPClientFactory.java

/**
 * Get {@link FTPClient} with initialized connects to server given in properties file
 * @return/*w  w  w.  ja  va  2  s .c  o  m*/
 */
public FTPClient getClientInstance() {

    ExecutorService ftpclientConnThreadPool = Executors.newSingleThreadExecutor();
    Future<FTPClient> future = ftpclientConnThreadPool.submit(new Callable<FTPClient>() {

        FTPClient ftpClient = new FTPClient();

        boolean connected;

        public FTPClient call() throws Exception {

            try {
                while (!connected) {
                    try {
                        ftpClient.connect(host, port);
                        if (!ftpClient.login(username, password)) {
                            ftpClient.logout();
                        }
                        connected = true;
                        return ftpClient;
                    } catch (Exception e) {
                        connected = false;
                    }

                }

                int reply = ftpClient.getReplyCode();
                // FTPReply stores a set of constants for FTP reply codes.
                if (!FTPReply.isPositiveCompletion(reply)) {
                    ftpClient.disconnect();
                }

                ftpClient.setFileType(FTP.BINARY_FILE_TYPE);

            } catch (Exception e) {
                log.error(e.getMessage(), e);
            }
            return ftpClient;
        }
    });

    FTPClient ftpClient = new FTPClient();
    try {
        // wait for 100 secs for acquiring conn else terminate
        ftpClient = future.get(100, TimeUnit.SECONDS);
    } catch (TimeoutException e) {
        log.info("FTP client Conn wait thread terminated!");
    } catch (InterruptedException e) {
        log.error(e.getMessage(), e);
    } catch (ExecutionException e) {
        log.error(e.getMessage(), e);
    }

    ftpclientConnThreadPool.shutdownNow();
    return ftpClient;

}

---

From source file:com.google.code.jconfig.factory.ConfigurationPluginFactory.java

/**
 * <p>/*  w  ww . java  2 s  .c o  m*/
 *    Returns a plugin instance of type <em>classname</em>.
 * </p>
 * 
 * <p>
 *    If the implementation class use the {@link Cacheable} annotation, it
 *    will be cached for future reuse otherwise a new instance will be
 *    created at every request.
 * </p>
 * 
 * @param classname the full name of an instance of
 *                  {@link IConfigurationPlugin}.
 * @return the plugin instance.
 * @throws PluginInstantiationException
 */
public static IConfigurationPlugin<?> getPlugin(final String classname) throws PluginInstantiationException {

    try {
        if (ClassUtils.getClass(classname).getAnnotation(Cacheable.class) == null) {
            logger.debug("Plugin <" + classname + "> is not cacheable. Creating a new one.");
            return (IConfigurationPlugin<?>) Class.forName(classname).newInstance();
        }
    } catch (Exception e) {
        throw new PluginInstantiationException(e.getMessage(), e);
    }

    // cacheable plugin
    FutureTask<IConfigurationPlugin<?>> theTask = cache.get(classname);
    if (theTask == null) {
        logger.debug("No plugin of class <" + classname + "> available. Creatine a new one.");
        Callable<IConfigurationPlugin<?>> eval = new Callable<IConfigurationPlugin<?>>() {

            public IConfigurationPlugin<?> call() throws Exception {
                IConfigurationPlugin<?> plugin = (IConfigurationPlugin<?>) Class.forName(classname)
                        .newInstance();
                return plugin;
            }
        };

        FutureTask<IConfigurationPlugin<?>> thePluginExec = new FutureTask<IConfigurationPlugin<?>>(eval);
        theTask = cache.putIfAbsent(classname, thePluginExec);
        if (theTask == null) {
            theTask = thePluginExec;
            theTask.run();
        }
        logger.debug("New plugin of class <" + classname + "> ready to be used and cached.");
    } else {
        logger.debug("Plugin of class <" + classname + "> available in cache. Using the cached one.");
    }

    try {
        return theTask.get();
    } catch (Exception e) {
        throw new PluginInstantiationException(e.getMessage(), e);
    } finally {
        logger.debug("plugin cache size: " + cache.size() + " - cache detail: " + cache);
    }
}

---

From source file:com.echopf.ECHOQuery.java

/**
 * Does Find objects from the remote server.
 * @param sync : if set TRUE, then the main (UI) thread is waited for complete the finding in a background thread. 
 *              (a synchronous communication)
 * @param listKey the key associated with the object list
 * @param clazz the object class/*from www  .  j av a 2 s. co m*/
 * @param callback invoked after the finding is completed
 * @param instanceId the reference ID of the finding target instance
 * @param resourceType the type of this object
 * @param params to control the output objects
 * @throws ECHOException
 */
public static <T extends ECHODataObject<T>> ECHOList<T> doFind(final boolean sync, final String listKey,
        final String resourceType, final FindCallback<T> callback, final String instanceId,
        final JSONObject fParams, final ECHODataObjectFactory<T> factory) throws ECHOException {

    // Get ready a background thread
    final Handler handler = new Handler();
    ExecutorService executor = Executors.newSingleThreadExecutor();
    Callable<ECHOList<T>> communicator = new Callable<ECHOList<T>>() {
        @Override
        public ECHOList<T> call() throws ECHOException {
            ECHOException exception = null;
            ECHOList<T> objList = null;

            try {
                JSONObject response = getRequest(instanceId + "/" + resourceType, fParams);

                /* begin copying data */
                objList = new ECHOList<T>(response.optJSONObject("paginate"));

                JSONArray items = response.optJSONArray(listKey);
                if (items == null)
                    throw new ECHOException(0, "Invalid data type for response-field `" + listKey + "`.");

                for (int i = 0; i < items.length(); i++) {
                    JSONObject item = items.optJSONObject(i);
                    if (item == null)
                        throw new ECHOException(0, "Invalid data type for response-field `" + listKey + "`.");

                    String refid = item.optString("refid");
                    if (refid.isEmpty())
                        continue;

                    T obj = factory.create(instanceId, refid, item);
                    objList.add(obj);
                }
                /* end copying data */

            } catch (ECHOException e) {
                exception = e;
            } catch (Exception e) {
                exception = new ECHOException(e);
            }

            if (sync == false) {
                // Execute a callback method in the main (UI) thread.
                if (callback != null) {
                    final ECHOException fException = exception;
                    final ECHOList<T> fObjList = objList;

                    handler.post(new Runnable() {
                        @Override
                        public void run() {
                            callback.done(fObjList, fException);
                        }
                    });
                }

                return null;

            } else {

                if (exception == null)
                    return objList;
                throw exception;

            }
        }
    };

    Future<ECHOList<T>> future = executor.submit(communicator);

    if (sync) {
        try {
            return future.get();
        } catch (InterruptedException e) {
            Thread.currentThread().interrupt(); // ignore/reset
        } catch (ExecutionException e) {
            Throwable e2 = e.getCause();

            if (e2 instanceof ECHOException) {
                throw (ECHOException) e2;
            }

            throw new RuntimeException(e2);
        }
    }

    return null;
}

---

From source file:comsat.sample.actuator.SampleController.java

private Callable<Map<String, String>> helloCallable(final DeferredResult<Map<String, String>> optDeferred)
        throws SuspendExecution {
    return new Callable<Map<String, String>>() {
        @Override//from  ww  w.  j a v  a 2s  .c om
        @Suspendable
        public Map<String, String> call() throws Exception {
            try {
                Fiber.sleep(10);
                Map<String, String> ret = Collections.singletonMap("message",
                        helloWorldService.getHelloMessage());
                if (optDeferred != null)
                    optDeferred.setResult(ret);
                return ret;
            } catch (Throwable t) {
                if (optDeferred != null)
                    optDeferred.setErrorResult(t);
                throw t;
            }
        }
    };
}

---

• «
• 1
• 2
• 3
• 4
• 5
• 6
• 7
• 8
• 9
• 10
• 11
• 12
• 13
• 14
• 15
• 16
• 17
• 18
• 19
• 20
• 21
• 22
• 23
• 24
• 25
• 26
• 27
• 28
• 29
• 30
• 31
• 32
• 33
• 34
• 35
• 36
• 37
• 38
• 39
• 40
• 41
• 42
• 43
• 44
• 45
• 46
• 47
• 48
• 49
• 50
• »