Example usage for java.util.concurrent.locks Lock unlock

Introduction

In this page you can find the example usage for java.util.concurrent.locks Lock unlock.

Prototype

void unlock();

Source Link

Document

Releases the lock.

Usage

From source file:com.cip.crane.agent.sheduler.ExecuteTaskThread.java

@Override
public void run() {
    Lock lock = LockHelper.getLock(taskAttempt);
    ScheduleConf conf = null;/*from  w  w  w .  j a  v  a  2s .c om*/
    ScheduleStatus status = null;
    try {
        lock.lock();
        conf = (ScheduleConf) cs.getConf(localIp, taskAttempt);
        status = (ScheduleStatus) cs.getStatus(localIp, taskAttempt);
        cs.addRunningJob(localIp, taskAttempt);
        status.setStatus(ScheduleStatus.EXECUTING);
        cs.updateStatus(localIp, taskAttempt, status);
    } catch (Exception e) {
        LOGGER.error(e, e);
    } finally {
        lock.unlock();
    }
    try {
        executeJob(conf, status);
    } catch (Exception e) {
        LOGGER.error(e, e);
        status.setStatus(ScheduleStatus.EXECUTE_FAILED);
        cs.removeRunningJob(localIp, taskAttempt);
    }
    try {
        lock.lock();
        cs.updateConf(localIp, taskAttempt, conf);
        ScheduleStatus thisStatus = (ScheduleStatus) cs.getStatus(localIp, taskAttempt);
        if (thisStatus.getStatus() != ScheduleStatus.DELETE_SUCCESS) {
            cs.updateStatus(localIp, taskAttempt, status);
            cs.removeRunningJob(localIp, taskAttempt);
        }
        LOGGER.debug(taskAttempt + " end execute");
    } catch (Exception e) {
        LOGGER.error(e, e);
    } finally {
        lock.unlock();
    }
}

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From source file:edu.cornell.mannlib.vitro.webapp.visualization.modelconstructor.factory.OrganizationToPublicationsForSubOrganizationsFactory.java

@Override
public Model getOrCreateModel(String uri, Dataset dataset) throws MalformedQueryParametersException {

    Model candidateModel = ConstructedModelTracker.getModel(ConstructedModelTracker.generateModelIdentifier(uri,
            OrganizationToPublicationsForSubOrganizationsModelConstructor.MODEL_TYPE));

    if (candidateModel != null) {

        return candidateModel;

    } else {//from w ww.  j  a  v a 2s  . c o  m
        Lock customLock = CustomLock.getLock();
        if (customLock.tryLock()) //Acquiring lock if available to construct the model
        {
            try {
                ModelConstructor model = new OrganizationToPublicationsForSubOrganizationsModelConstructor(uri,
                        dataset);

                Model constructedModel = model.getConstructedModel();
                ConstructedModelTracker.trackModel(
                        ConstructedModelTracker.generateModelIdentifier(uri,
                                OrganizationToPublicationsForSubOrganizationsModelConstructor.MODEL_TYPE),
                        constructedModel);
                return constructedModel;
            } finally {
                customLock.unlock();
            }
        } else {
            log.info("The Model construction process is going on");
            return null;
        }
    }
}

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From source file:com.cloudera.oryx.ml.serving.als.model.ALSServingModel.java

public Map<String, Integer> getItemCounts() {
    ObjIntMap<String> counts = HashObjIntMaps.newUpdatableMap();
    Lock lock = xLock.readLock();
    lock.lock();//from  w  w w. java2 s  . co  m
    try {
        for (Collection<String> ids : knownItems.values()) {
            synchronized (ids) {
                for (String id : ids) {
                    counts.addValue(id, 1);
                }
            }
        }
    } finally {
        lock.unlock();
    }
    return counts;
}

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From source file:gridool.db.sql.ParallelSQLExecJob.java

private static int invokeCopyIntoTable(@Nonnull final ParallelSQLMapTaskResult result,
        @Nonnull final String outputName, @Nonnull final DBAccessor dba, @Nonnull final LockManager lockMgr,
        @Nonnull final Timings timings) throws GridException {
    final File file = getImportingFile(result, outputName);
    final long filesize = file.length();
    int taskNum = result.getTaskNumber();
    final String tableName = getTaskResultTableName(outputName, taskNum);
    final String sql = constructCopyIntoQuery(file, result, tableName);

    final long mergeTableTime;
    final int affected;
    ReadWriteLock systableLock = lockMgr.obtainLock(DBAccessor.SYS_TABLE_SYMBOL);
    final Lock lock = WORKAROUND_EXLOCK_ON_SYSTBL ? systableLock.writeLock() : systableLock.readLock(); // FIXME REVIEWME why exclusive lock? => sometimes produces wrong result [Trick] read lock for system tables
    final Connection conn = GridDbUtils.getPrimaryDbConnection(dba, true);
    lock.lock();// ww w.ja  va 2s . c o m
    final long startMergeTableTime = System.currentTimeMillis();
    try {
        affected = JDBCUtils.update(conn, sql);
    } catch (SQLException e) {
        LOG.error(e);
        throw new GridException("failed to execute a query: " + sql, e);
    } finally {
        mergeTableTime = System.currentTimeMillis() - startMergeTableTime;
        lock.unlock();

        JDBCUtils.closeQuietly(conn);
        new FileDeletionThread(file, LOG).start();
    }

    int expected = result.getNumRows();
    if (affected != expected) {
        String warnmsg = "COPY INTO TABLE failed [Expected: " + expected + ", Inserted: " + affected + ']';
        LOG.warn(warnmsg);
        throw new GridException(warnmsg);
    }
    synchronized (timings) {
        timings.mergeTableTimes.add(mergeTableTime);
        timings.recievedBytes.add(filesize);
        timings.recievedRecords.add(affected);
    }
    return affected;
}

---

From source file:org.springframework.integration.jdbc.lock.JdbcLockRegistryDifferentClientTests.java

@Test
public void testExclusiveAccess() throws Exception {
    DefaultLockRepository client1 = new DefaultLockRepository(dataSource);
    client1.afterPropertiesSet();/* w w w.ja  v  a  2  s. c o m*/
    final DefaultLockRepository client2 = new DefaultLockRepository(dataSource);
    client2.afterPropertiesSet();
    Lock lock1 = new JdbcLockRegistry(client1).obtain("foo");
    final BlockingQueue<Integer> data = new LinkedBlockingQueue<Integer>();
    final CountDownLatch latch1 = new CountDownLatch(1);
    lock1.lockInterruptibly();
    Executors.newSingleThreadExecutor().execute(() -> {
        Lock lock2 = new JdbcLockRegistry(client2).obtain("foo");
        try {
            latch1.countDown();
            StopWatch stopWatch = new StopWatch();
            stopWatch.start();
            lock2.lockInterruptibly();
            stopWatch.stop();
            data.add(4);
            Thread.sleep(10);
            data.add(5);
            Thread.sleep(10);
            data.add(6);
        } catch (InterruptedException e) {
            Thread.currentThread().interrupt();
        } finally {
            lock2.unlock();
        }
    });
    assertTrue(latch1.await(10, TimeUnit.SECONDS));
    data.add(1);
    Thread.sleep(1000);
    data.add(2);
    Thread.sleep(1000);
    data.add(3);
    lock1.unlock();
    for (int i = 0; i < 6; i++) {
        Integer integer = data.poll(10, TimeUnit.SECONDS);
        assertNotNull(integer);
        assertEquals(i + 1, integer.intValue());
    }
}

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From source file:net.myrrix.online.ServerRecommender.java

private static void updateClusters(long id, float[] featureVector, Collection<IDCluster> clusters,
        Lock clustersReadLock) {
    if (featureVector == null || clusters == null || clusters.isEmpty()) {
        return;//from  w ww.  j a  v  a2 s .c  o  m
    }

    IDCluster closestCentroid;
    clustersReadLock.lock();
    try {
        closestCentroid = findClosestCentroid(featureVector, clusters);
    } finally {
        clustersReadLock.unlock();
    }

    if (closestCentroid == null) {
        return;
    }

    FastIDSet newMembers = closestCentroid.getMembers();

    boolean removeFromCurrentCluster;
    synchronized (newMembers) {
        // Wasn't already present, so was present elsewhere; find and remove it        
        removeFromCurrentCluster = newMembers.add(id);
    }

    if (removeFromCurrentCluster) {
        clustersReadLock.lock();
        try {
            for (IDCluster cluster : clusters) {
                FastIDSet oldMembers = cluster.getMembers();
                synchronized (oldMembers) {
                    if (oldMembers.remove(id)) {
                        break;
                    }
                }
            }
        } finally {
            clustersReadLock.unlock();
        }
    }
}

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From source file:com.lonepulse.zombielink.processor.AsyncEndpointTest.java

/**
 * <p>See {@link #testAsyncSuccess()}.</p>
 *///from  ww  w .  j av a  2  s.  com
private void successScenario() throws InterruptedException {

    String subpath = "/asyncsuccess", body = "hello";

    stubFor(get(urlEqualTo(subpath)).willReturn(aResponse().withStatus(200).withBody(body)));

    final Object[] content = new Object[2];

    final Lock lock = new ReentrantLock();
    final Condition condition = lock.newCondition();

    String result = asyncEndpoint.asyncSuccess(new AsyncHandler<String>() {

        @Override
        public void onSuccess(HttpResponse httpResponse, String deserializedContent) {

            lock.lock();

            content[0] = httpResponse;
            content[1] = deserializedContent;

            condition.signal();
            lock.unlock();
        }
    });

    lock.lock();
    condition.await();
    lock.unlock();

    verify(getRequestedFor(urlEqualTo(subpath)));

    assertTrue(content[0] != null);
    assertTrue(content[1] != null);
    assertTrue(content[1].equals(body));

    assertNull(result);
}

---

From source file:com.lonepulse.zombielink.processor.AsyncEndpointTest.java

/**
 * <p>Tests a successful asynchronous request where the implementation of the 
 * {@link AsyncHandler#onSuccess(HttpResponse, Object)} callback throws an exception.</p> 
 *  //from   ww  w.  j a va 2s.  c  o m
 * @since 1.3.0
 */
@Test
public final void testAsyncSuccessCallbackError() throws InterruptedException {

    String subpath = "/successcallbackerror";

    stubFor(get(urlEqualTo(subpath)).willReturn(aResponse().withStatus(200)));

    final Lock lock = new ReentrantLock();
    final Condition condition = lock.newCondition();

    asyncEndpoint.asyncSuccessCallbackError(new AsyncHandler<String>() {

        @Override
        public void onSuccess(HttpResponse httpResponse, String e) {

            try {

                throw new IllegalStateException();
            } finally {

                lock.lock();
                condition.signal();
                lock.unlock();
            }
        }
    });

    lock.lock();
    condition.await();
    lock.unlock();

    verify(getRequestedFor(urlEqualTo(subpath)));

    successScenario(); //verify that the asynchronous request executor has survived the exception
}

---

From source file:edu.internet2.middleware.shibboleth.common.attribute.resolver.provider.ShibbolethAttributeResolver.java

/** {@inheritDoc} */
public Map<String, BaseAttribute> resolveAttributes(SAMLProfileRequestContext attributeRequestContext)
        throws AttributeResolutionException {
    ShibbolethResolutionContext resolutionContext = new ShibbolethResolutionContext(attributeRequestContext);

    log.debug("{} resolving attributes for principal {}", getId(), attributeRequestContext.getPrincipalName());

    if (getAttributeDefinitions().size() == 0) {
        log.debug("No attribute definitions loaded in {} so no attributes can be resolved for principal {}",
                getId(), attributeRequestContext.getPrincipalName());
        return new HashMap<String, BaseAttribute>();
    }/* ww  w .j a  va 2  s . co m*/

    Lock readLock = getReadWriteLock().readLock();
    readLock.lock();
    Map<String, BaseAttribute> resolvedAttributes = null;
    try {
        resolvedAttributes = resolveAttributes(resolutionContext);
        cleanResolvedAttributes(resolvedAttributes, resolutionContext);
    } finally {
        readLock.unlock();
    }

    log.debug(getId() + " resolved, for principal {}, the attributes: {}",
            attributeRequestContext.getPrincipalName(), resolvedAttributes.keySet());
    return resolvedAttributes;
}

---

From source file:com.lonepulse.zombielink.processor.AsyncEndpointTest.java

/**
 * <p>Tests asynchronous request execution with @{@link Async} and 
 * {@link AsyncHandler#onError(Exception)}.</p>
 *  //from w  w  w .ja  va2 s  .c  om
 * @since 1.3.0
 */
@Test
public final void testAsyncError() throws InterruptedException {

    String subpath = "/asyncerror", body = "non-JSON-content";

    stubFor(get(urlEqualTo(subpath)).willReturn(aResponse().withStatus(200).withBody(body)));

    final Object[] content = new Object[1];

    final Lock lock = new ReentrantLock();
    final Condition condition = lock.newCondition();

    asyncEndpoint.asyncError(new AsyncHandler<User>() {

        @Override
        public void onSuccess(HttpResponse httpResponse, User user) {
        }

        @Override
        public void onError(InvocationException error) {

            lock.lock();

            content[0] = error;
            condition.signal();

            lock.unlock();
        }
    });

    lock.lock();
    condition.await();
    lock.unlock();

    verify(getRequestedFor(urlEqualTo(subpath)));

    assertTrue(content[0] != null);
    assertTrue(content[0] instanceof InvocationException);
}

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