Example usage for java.util.concurrent FutureTask get

Introduction

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

Prototype

public V get() throws InterruptedException, ExecutionException 

Source Link

Usage

From source file:org.springframework.batch.core.scope.AsyncJobScopeIntegrationTests.java

@Test
public void testGetSameInMultipleThreads() throws Exception {

    List<FutureTask<String>> tasks = new ArrayList<FutureTask<String>>();
    final JobExecution jobExecution = new JobExecution(11L);
    ExecutionContext executionContext = jobExecution.getExecutionContext();
    executionContext.put("foo", "foo");
    JobSynchronizationManager.register(jobExecution);
    assertEquals("foo", simple.getName());

    for (int i = 0; i < 12; i++) {
        final String value = "foo" + i;
        FutureTask<String> task = new FutureTask<String>(new Callable<String>() {
            @Override/*from   ww w  .  j a va 2  s .com*/
            public String call() throws Exception {
                ExecutionContext executionContext = jobExecution.getExecutionContext();
                executionContext.put("foo", value);
                JobContext context = JobSynchronizationManager.register(jobExecution);
                logger.debug("Registered: " + context.getJobExecutionContext());
                try {
                    return simple.getName();
                } finally {
                    JobSynchronizationManager.close();
                }
            }
        });
        tasks.add(task);
        taskExecutor.execute(task);
    }

    for (FutureTask<String> task : tasks) {
        assertEquals("foo", task.get());
    }

    // Don't close the outer scope until all tasks are finished. This should
    // always be the case if using an AbstractJob
    JobSynchronizationManager.close();

}

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From source file:org.springframework.batch.core.scope.AsyncStepScopeIntegrationTests.java

@Test
public void testGetSameInMultipleThreads() throws Exception {

    List<FutureTask<String>> tasks = new ArrayList<FutureTask<String>>();
    final StepExecution stepExecution = new StepExecution("foo", new JobExecution(0L), 123L);
    ExecutionContext executionContext = stepExecution.getExecutionContext();
    executionContext.put("foo", "foo");
    StepSynchronizationManager.register(stepExecution);
    assertEquals("foo", simple.getName());

    for (int i = 0; i < 12; i++) {
        final String value = "foo" + i;
        FutureTask<String> task = new FutureTask<String>(new Callable<String>() {
            @Override//w w  w .  j av a  2  s.c  o m
            public String call() throws Exception {
                ExecutionContext executionContext = stepExecution.getExecutionContext();
                executionContext.put("foo", value);
                StepContext context = StepSynchronizationManager.register(stepExecution);
                logger.debug("Registered: " + context.getStepExecutionContext());
                try {
                    return simple.getName();
                } finally {
                    StepSynchronizationManager.close();
                }
            }
        });
        tasks.add(task);
        taskExecutor.execute(task);
    }

    for (FutureTask<String> task : tasks) {
        assertEquals("foo", task.get());
    }

    // Don't close the outer scope until all tasks are finished. This should
    // always be the case if using an AbstractStep
    StepSynchronizationManager.close();

}

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From source file:com.alibaba.napoli.metamorphosis.client.consumer.ConsumerZooKeeper.java

ZKLoadRebalanceListener getBrokerConnectionListener(final FetchManager fetchManager) {
    final FutureTask<ZKLoadRebalanceListener> task = this.consumerLoadBalanceListeners.get(fetchManager);
    if (task != null) {
        try {/* w  w w  .j ava  2  s .c  om*/
            return task.get();
        } catch (final Exception e) {
            log.error("?ZKLoadRebalanceListener", e);
            return null;
        }
    } else {
        return null;
    }
}

---

From source file:com.alibaba.napoli.metamorphosis.client.consumer.ConsumerZooKeeper.java

@Override
public void onZkClientChanged(final ZkClient newClient) {
    this.zkClient = newClient;
    // ?consumer//from   w  w  w .  ja va  2s  .  c  om
    for (final FutureTask<ZKLoadRebalanceListener> task : this.consumerLoadBalanceListeners.values()) {
        try {
            final ZKLoadRebalanceListener listener = task.get();
            // ??consumer??offsetoffset
            listener.topicRegistry.clear();
            log.info("re-register consumer to zk,group=" + listener.consumerConfig.getGroup());
            this.registerConsumerInternal(listener);
        } catch (final Exception e) {
            log.error("reRegister consumer failed", e);
        }
    }

}

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From source file:org.springframework.batch.core.scope.AsyncJobScopeIntegrationTests.java

@Test
public void testGetMultipleInMultipleThreads() throws Exception {

    List<FutureTask<String>> tasks = new ArrayList<FutureTask<String>>();

    for (int i = 0; i < 12; i++) {
        final String value = "foo" + i;
        final Long id = 123L + i;
        FutureTask<String> task = new FutureTask<String>(new Callable<String>() {
            @Override/*from w  w  w  . j  a v  a2 s.  com*/
            public String call() throws Exception {
                JobExecution jobExecution = new JobExecution(id);
                ExecutionContext executionContext = jobExecution.getExecutionContext();
                executionContext.put("foo", value);
                JobContext context = JobSynchronizationManager.register(jobExecution);
                logger.debug("Registered: " + context.getJobExecutionContext());
                try {
                    return simple.getName();
                } finally {
                    JobSynchronizationManager.close();
                }
            }
        });
        tasks.add(task);
        taskExecutor.execute(task);
    }

    int i = 0;
    for (FutureTask<String> task : tasks) {
        assertEquals("foo" + i, task.get());
        i++;
    }

}

---

From source file:com.alibaba.napoli.metamorphosis.client.consumer.ConsumerZooKeeper.java

/**
 * ?consumer/*from   w  w w.  j  av  a  2 s . c o  m*/
 * 
 * @param fetchManager
 */
public void unRegisterConsumer(final FetchManager fetchManager) {
    try {
        final FutureTask<ZKLoadRebalanceListener> futureTask = this.consumerLoadBalanceListeners
                .remove(fetchManager);
        if (futureTask != null) {
            final ZKLoadRebalanceListener listener = futureTask.get();
            if (listener != null) {
                // ??offsets
                listener.commitOffsets();
                this.zkClient.unsubscribeStateChanges(new ZKSessionExpireListenner(listener));
                final ZKGroupDirs dirs = this.metaZookeeper.new ZKGroupDirs(listener.consumerConfig.getGroup());
                this.zkClient.unsubscribeChildChanges(dirs.consumerRegistryDir, listener);
                log.info("unsubscribeChildChanges:" + dirs.consumerRegistryDir);
                // topic?
                for (final String topic : listener.topicSubcriberRegistry.keySet()) {
                    final String partitionPath = this.metaZookeeper.brokerTopicsPath + "/" + topic;
                    this.zkClient.unsubscribeChildChanges(partitionPath, listener);
                    log.info("unsubscribeChildChanges:" + partitionPath);
                }
                // ownership
                listener.releaseAllPartitionOwnership();
                // 
                ZkUtils.deletePath(this.zkClient,
                        listener.dirs.consumerRegistryDir + "/" + listener.consumerIdString);
            }
        }
    } catch (final InterruptedException e) {
        Thread.interrupted();
        log.error("Interrupted when unRegisterConsumer", e);
    } catch (final Exception e) {
        log.error("Error in unRegisterConsumer,maybe error when registerConsumer", e);
    }
}

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From source file:plugin.chartboost.hasCachedMoreApps.java

/**
 * This method is called when the Lua function is called.
 * <p>//from w ww  .  ja  v  a2  s.c  o m
 * Warning! This method is not called on the main UI thread.
 * @param luaState Reference to the Lua state.
 *                 Needed to retrieve the Lua function's parameters and to return values back to Lua.
 * @return Returns the number of values to be returned by the Lua function.
 */
@Override
public int invoke(LuaState luaState) {
    try {
        // Corona Activity
        CoronaActivity coronaActivity = null;
        if (CoronaEnvironment.getCoronaActivity() != null) {
            coronaActivity = CoronaEnvironment.getCoronaActivity();
        }

        // The lua state
        final LuaState L = luaState;

        // See if the more apps page is cached
        FutureTask<Boolean> isCachedResult = new FutureTask<Boolean>(new Callable<Boolean>() {
            @Override
            public Boolean call() throws Exception {
                // Is more apps cached?
                boolean result = false;

                // If the chartboost instance is valid - could be invalid by calling this method before init invokes
                if (chartboostHelper.chartboostInstance != null) {
                    result = chartboostHelper.chartboostInstance.hasCachedMoreApps();
                }
                // Push the result
                L.pushBoolean(result);
                // Return the result
                return result;
            }
        });

        // Run the activity on the uiThread
        if (coronaActivity != null) {
            coronaActivity.runOnUiThread(isCachedResult);
            // Get the value of isCached
            boolean returnValue = isCachedResult.get();
        }
    } catch (Exception ex) {
        // An exception will occur if given an invalid argument or no argument. Print the error.
        ex.printStackTrace();
    }

    return 1;
}

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From source file:org.springframework.batch.core.scope.AsyncStepScopeIntegrationTests.java

@Test
public void testGetMultipleInMultipleThreads() throws Exception {

    List<FutureTask<String>> tasks = new ArrayList<FutureTask<String>>();

    for (int i = 0; i < 12; i++) {
        final String value = "foo" + i;
        final Long id = 123L + i;
        FutureTask<String> task = new FutureTask<String>(new Callable<String>() {
            @Override//from   w ww . ja v  a 2s. c  om
            public String call() throws Exception {
                StepExecution stepExecution = new StepExecution(value, new JobExecution(0L), id);
                ExecutionContext executionContext = stepExecution.getExecutionContext();
                executionContext.put("foo", value);
                StepContext context = StepSynchronizationManager.register(stepExecution);
                logger.debug("Registered: " + context.getStepExecutionContext());
                try {
                    return simple.getName();
                } finally {
                    StepSynchronizationManager.close();
                }
            }
        });
        tasks.add(task);
        taskExecutor.execute(task);
    }

    int i = 0;
    for (FutureTask<String> task : tasks) {
        assertEquals("foo" + i, task.get());
        i++;
    }

}

---

From source file:org.springframework.batch.core.step.tasklet.SystemCommandTasklet.java

/**
 * Execute system command and map its exit code to {@link ExitStatus} using
 * {@link SystemProcessExitCodeMapper}./*w ww .ja  v  a 2  s.c  o m*/
 */
@Override
public RepeatStatus execute(StepContribution contribution, ChunkContext chunkContext) throws Exception {

    FutureTask<Integer> systemCommandTask = new FutureTask<Integer>(new Callable<Integer>() {

        @Override
        public Integer call() throws Exception {
            Process process = Runtime.getRuntime().exec(command, environmentParams, workingDirectory);
            return process.waitFor();
        }

    });

    long t0 = System.currentTimeMillis();

    taskExecutor.execute(systemCommandTask);

    while (true) {
        Thread.sleep(checkInterval);//moved to the end of the logic

        if (stoppable) {
            JobExecution jobExecution = jobExplorer
                    .getJobExecution(chunkContext.getStepContext().getStepExecution().getJobExecutionId());

            if (jobExecution.isStopping()) {
                stopped = true;
            }
        }

        if (systemCommandTask.isDone()) {
            contribution.setExitStatus(systemProcessExitCodeMapper.getExitStatus(systemCommandTask.get()));
            return RepeatStatus.FINISHED;
        } else if (System.currentTimeMillis() - t0 > timeout) {
            systemCommandTask.cancel(interruptOnCancel);
            throw new SystemCommandException("Execution of system command did not finish within the timeout");
        } else if (execution.isTerminateOnly()) {
            systemCommandTask.cancel(interruptOnCancel);
            throw new JobInterruptedException(
                    "Job interrupted while executing system command '" + command + "'");
        } else if (stopped) {
            systemCommandTask.cancel(interruptOnCancel);
            contribution.setExitStatus(ExitStatus.STOPPED);
            return RepeatStatus.FINISHED;
        }
    }
}

---

From source file:ubic.basecode.math.linalg.SingularValueDecomposition.java

/**
 * @param dm//  ww  w . j ava 2 s.c o m
 */
private void computeSVD(final DoubleMatrix2D dm) {
    /*
     * This fails to converge some times, we have to bail.
     */
    FutureTask<cern.colt.matrix.linalg.SingularValueDecomposition> svdFuture = new FutureTask<>(
            new Callable<cern.colt.matrix.linalg.SingularValueDecomposition>() {
                @Override
                public cern.colt.matrix.linalg.SingularValueDecomposition call() {
                    return new cern.colt.matrix.linalg.SingularValueDecomposition(dm);
                }
            });

    StopWatch timer = new StopWatch();
    timer.start();
    Executors.newSingleThreadExecutor().execute(svdFuture);

    while (!svdFuture.isDone() && !svdFuture.isCancelled()) {
        try {
            Thread.sleep(100);
        } catch (InterruptedException ie) {
            throw new RuntimeException("SVD cancelled");
        }
        if (timer.getTime() > MAX_COMPUTE_TIME) {
            svdFuture.cancel(true);
            throw new RuntimeException("SVD failed to converge within " + MAX_COMPUTE_TIME + "ms, bailing");
        }
    }
    timer.stop();
    try {
        this.svd = svdFuture.get();
    } catch (InterruptedException e) {
        throw new RuntimeException(e);
    } catch (ExecutionException e) {
        throw new RuntimeException(e);
    }

    assert this.svd != null;
}

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