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

Introduction

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

Prototype

lock

Source Link

Usage

From source file:edu.internet2.middleware.shibboleth.common.config.BaseService.java

/** {@inheritDoc} */
public void destroy() throws ServiceException {
    Lock writeLock = getReadWriteLock().writeLock();
    writeLock.lock();
    isDestroyed = true;/*from w w  w .  ja  v a2 s  . co  m*/
    serviceContext = null;
    serviceConfigurations.clear();
    setInitialized(false);
    writeLock.unlock();
    serviceContextRWLock = null;
}

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From source file:org.springframework.integration.metadata.PropertiesPersistingMetadataStore.java

@Override
public boolean replace(String key, String oldValue, String newValue) {
    Assert.notNull(key, "'key' cannot be null");
    Assert.notNull(oldValue, "'oldValue' cannot be null");
    Assert.notNull(newValue, "'newValue' cannot be null");
    Lock lock = this.lockRegistry.obtain(key);
    lock.lock();
    try {//from w w  w .ja  v  a 2s .c  om
        String property = this.metadata.getProperty(key);
        if (oldValue.equals(property)) {
            this.metadata.setProperty(key, newValue);
            this.dirty = true;
            return true;
        } else {
            return false;
        }
    } finally {
        lock.unlock();
    }
}

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From source file:fm.last.moji.impl.MojiFileImpl.java

@Override
public InputStream getInputStream() throws IOException {
    log.debug("getInputStream() : {}", this);
    InputStream inputStream = null;
    try {//from w  w  w  .ja va 2  s . c  om
        Lock readLock = lock.readLock();
        readLock.lock();
        GetInputStreamCommand command = new GetInputStreamCommand(key, domain, httpFactory, readLock);
        executor.executeCommand(command);
        inputStream = command.getInputStream();
        log.debug("getInputStream() -> {}", inputStream);
    } catch (Throwable e) {
        unlockQuietly(lock.readLock());
        IOUtils.closeQuietly(inputStream);
        if (e instanceof IOException) {
            throw (IOException) e;
        } else {
            throw new RuntimeException(e);
        }
    }
    // calling close will release the lock
    return inputStream;
}

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From source file:fm.last.moji.impl.MojiFileImpl.java

@Override
public OutputStream getOutputStream() throws IOException {
    log.debug("getOutputStream() : {}", this);
    OutputStream outputStream = null;
    try {//from  w ww .j  a va 2  s.c  o  m
        Lock writeLock = lock.writeLock();
        writeLock.lock();
        GetOutputStreamCommand command = new GetOutputStreamCommand(trackerFactory, httpFactory, key, domain,
                storageClass, writeLock);
        executor.executeCommand(command);
        outputStream = command.getOutputStream();
        log.debug("getOutputStream() -> {}", outputStream);
    } catch (Throwable e) {
        unlockQuietly(lock.writeLock());
        IOUtils.closeQuietly(outputStream);
        if (e instanceof IOException) {
            throw (IOException) e;
        } else {
            throw new RuntimeException(e);
        }
    }
    // calling close will release the lock
    return outputStream;
}

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From source file:de.taimos.daemon.spring.SpringDaemonAdapter.java

@Override
public final void doStart() throws Exception {
    super.doStart();
    try {//from www  . j  a  v  a  2 s. c  o  m
        this.doBeforeSpringStart();
    } catch (Exception e) {
        throw new RuntimeException("Before spring failed", e);
    }

    Lock writeLock = this.rwLock.writeLock();
    AbstractXmlApplicationContext ctx = null;
    try {
        writeLock.lock();
        if (this.context.get() != null) {
            throw new RuntimeException("Already started");
        }
        ctx = this.createSpringContext();
        String[] profiles = System.getProperty(Configuration.PROFILES, Configuration.PROFILES_PRODUCTION)
                .split(",");
        ctx.getEnvironment().setActiveProfiles(profiles);

        final PropertySourcesPlaceholderConfigurer configurer = new PropertySourcesPlaceholderConfigurer();
        configurer.setProperties(DaemonStarter.getDaemonProperties());
        ctx.addBeanFactoryPostProcessor(configurer);

        ctx.setConfigLocation(this.getSpringResource());
        ctx.refresh();
    } catch (Exception e) {
        if (ctx != null) {
            try {
                ctx.close();
            } catch (Exception e1) {
                this.logger.warn("Failed to close context", e1);
            }
            ctx = null;
        }
        throw new RuntimeException("Spring context failed", e);
    } finally {
        if (ctx != null) {
            this.context.set(ctx);
        }
        writeLock.unlock();
    }

    try {
        this.doAfterSpringStart();
    } catch (Exception e) {
        throw new RuntimeException("After spring failed", e);
    }
}

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From source file:info.pancancer.arch3.worker.WorkerHeartbeat.java

@Override
public void run() {

    Channel reportingChannel = null;
    try {//from w ww . ja  v  a 2  s . c o  m
        try {
            reportingChannel = Utilities.setupExchange(settings, this.queueName);
        } catch (IOException | TimeoutException | AlreadyClosedException e) {
            LOG.error("Exception caught! Queue channel could not be opened, waiting. Exception is: "
                    + e.getMessage(), e);
            // retry after a minute, do not die simply because the launcher is unavailable, it may come back
            Thread.sleep(Base.ONE_MINUTE_IN_MILLISECONDS);
        }
    } catch (InterruptedException e) {
        Thread.currentThread().interrupt();
        LOG.info("Caught interrupt signal, heartbeat shutting down.", e);
        return;
    }

    LOG.info("starting heartbeat thread, will send heartbeat message ever " + secondsDelay + " seconds.");
    while (!Thread.interrupted()) {
        // byte[] stdOut = this.getMessageBody().getBytes(StandardCharsets.UTF_8);
        try {
            try {
                Status heartbeatStatus = new Status();
                heartbeatStatus.setJobUuid(this.jobUuid);
                heartbeatStatus.setMessage("job is running; IP address: " + networkID);
                heartbeatStatus.setState(StatusState.RUNNING);
                heartbeatStatus.setType(Utilities.JOB_MESSAGE_TYPE);
                heartbeatStatus.setVmUuid(this.vmUuid);
                heartbeatStatus.setIpAddress(networkID);

                // String stdOut = this.statusSource.getStdOut();
                Lock lock = new ReentrantLock();
                lock.lock();
                String stdOut = this.statusSource.getStdOut(stdoutSnipSize);
                String stdErr = this.statusSource.getStdErr();
                lock.unlock();
                heartbeatStatus.setStdout(stdOut);
                heartbeatStatus.setStderr(stdErr);
                String heartBeatMessage = heartbeatStatus.toJSON();
                LOG.debug("Sending heartbeat message to " + queueName + ", with body: " + heartBeatMessage);
                reportingChannel.basicPublish(queueName, queueName, MessageProperties.PERSISTENT_TEXT_PLAIN,
                        heartBeatMessage.getBytes(StandardCharsets.UTF_8));
                reportingChannel.waitForConfirms();

                Thread.sleep((long) (secondsDelay * MILLISECONDS_PER_SECOND));
            } catch (IOException | AlreadyClosedException e) {
                LOG.error("IOException caught! Message may not have been published. Exception is: "
                        + e.getMessage(), e);
                // retry after a minute, do not die simply because the launcher is unavailable, it may come back
                Thread.sleep(Base.ONE_MINUTE_IN_MILLISECONDS);
            }
        } catch (InterruptedException e) {
            LOG.info("Heartbeat shutting down.");
            if (reportingChannel.getConnection().isOpen()) {
                try {
                    reportingChannel.getConnection().close();
                } catch (IOException e1) {
                    LOG.error("Error closing reportingChannel connection: " + e1.getMessage(), e1);
                }
            }
            if (reportingChannel.isOpen()) {
                try {
                    reportingChannel.close();
                } catch (IOException e1) {
                    LOG.error("Error (IOException) closing reportingChannel: " + e1.getMessage(), e1);
                } catch (TimeoutException e1) {
                    LOG.error("Error (TimeoutException) closing reportingChannel: " + e1.getMessage(), e1);
                }
            }
            LOG.debug("reporting channel open: " + reportingChannel.isOpen());
            LOG.debug("reporting channel connection open: " + reportingChannel.getConnection().isOpen());

            Thread.currentThread().interrupt();
        }
    }
}

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From source file:com.jayway.jaxrs.hateoas.DefaultHateoasContext.java

/**
 * Checks if the specified class has been registered. If not add the class to the set mapping
 * registred classes./*www .j a v  a  2 s  .c o m*/
 *
 * @param clazz the class to check
 * @return <code>true</code> if the class has already been registered,
 *         <code>false</code> otherwise.
 */
public boolean isInitialized(Class<?> clazz) {
    Lock readLock = LOCK.readLock();
    try {
        readLock.lock();
        if (initializedClasses.contains(clazz)) {
            return true;
        }
    } finally {
        readLock.unlock();
    }

    Lock writeLock = LOCK.writeLock();
    try {
        writeLock.lock();
        if (!initializedClasses.contains(clazz)) { // check again - things might have changed
            initializedClasses.add(clazz);
            return false;
        }
    } finally {
        writeLock.unlock();
    }

    return true;
}

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From source file:com.enonic.cms.business.portal.image.ImageServiceImpl.java

public ImageResponse process(ImageRequest imageRequest) {
    Preconditions.checkNotNull(imageRequest, "imageRequest cannot be null");

    final ImageRequestTrace imageRequestTrace = livePortalTraceService.getCurrentImageRequestTrace();

    String blobKey = getBlobKey(imageRequest);
    if (blobKey == null) {
        return ImageResponse.notFound();
    }/*from  w  ww .j a  v a 2  s .c  o m*/

    imageRequest.setBlobKey(blobKey);

    final Lock locker = concurrencyLock.getLock(imageRequest.getCacheKey());

    try {
        locker.lock();

        ImageResponse res = imageCache.get(imageRequest);
        if (res != null) {
            ImageRequestTracer.traceImageResponse(imageRequestTrace, res);
            ImageRequestTracer.traceUsedCachedResult(imageRequestTrace, true);
            return res;
        }

        try {
            res = doProcess(imageRequest);
            ImageRequestTracer.traceImageResponse(imageRequestTrace, res);
            ImageRequestTracer.traceUsedCachedResult(imageRequestTrace, false);
            return res;
        } catch (Exception e) {
            throw new ImageProcessorException("Failed to process image: " + e.getMessage(), e);
        }
    } finally {
        locker.unlock();
    }
}

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From source file:edu.internet2.middleware.shibboleth.common.config.BaseService.java

/**
 * Loads the service context.//w  ww  .ja  v  a  2s  .c om
 * 
 * @throws ServiceException thrown if the configuration for this service could not be loaded
 */
protected void loadContext() throws ServiceException {
    log.info("Loading new configuration for service {}", getId());

    if (serviceConfigurations == null || serviceConfigurations.isEmpty()) {
        setInitialized(true);
        return;
    }

    GenericApplicationContext newServiceContext = new GenericApplicationContext(getApplicationContext());
    newServiceContext.setDisplayName("ApplicationContext:" + getId());
    Lock writeLock = getReadWriteLock().writeLock();
    writeLock.lock();
    try {
        SpringConfigurationUtils.populateRegistry(newServiceContext, getServiceConfigurations());
        newServiceContext.refresh();

        GenericApplicationContext replacedServiceContext = serviceContext;
        onNewContextCreated(newServiceContext);
        setServiceContext(newServiceContext);
        setInitialized(true);
        if (replacedServiceContext != null) {
            replacedServiceContext.close();
        }
        log.info("{} service loaded new configuration", getId());
    } catch (Throwable e) {
        // Here we catch all the other exceptions thrown by Spring when it starts up the context
        setInitialized(false);
        Throwable rootCause = e;
        while (rootCause.getCause() != null) {
            rootCause = rootCause.getCause();
        }
        log.error("Configuration was not loaded for " + getId()
                + " service, error creating components.  The root cause of this error was: "
                + rootCause.getClass().getCanonicalName() + ": " + rootCause.getMessage());
        log.trace("Full stacktrace is: ", e);
        throw new ServiceException(
                "Configuration was not loaded for " + getId() + " service, error creating components.",
                rootCause);
    } finally {
        writeLock.unlock();
    }
}

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From source file:com.callidusrobotics.droptables.configuration.MongoFactory.java

/**
 * Generates a connection wrapper using the read-write credentials.
 *
 * @param env//ww w .ja v  a  2  s.c om
 *          The application's environment
 * @return The connection wrapper, never null
 * @throws UnknownHostException
 * @see #buildReadWriteClient(Environment)
 */
public Datastore buildReadWriteDatastore(Environment env) throws UnknownHostException {
    if (rwDatastore != null) {
        return rwDatastore;
    }

    Lock lock = locks[LockFlags.DATASTORE.ordinal()];
    lock.lock();

    try {
        if (rwDatastore == null) {
            rwDatastore = morphia.createDatastore(buildReadWriteClient(env), dbName);
        }
    } finally {
        lock.unlock();
    }

    return rwDatastore;
}

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