Example usage for java.util.concurrent.locks ReadWriteLock writeLock

Introduction

In this page you can find the example usage for java.util.concurrent.locks ReadWriteLock writeLock.

Prototype

Lock writeLock();

Source Link

Document

Returns the lock used for writing.

Usage

From source file:org.apache.servicemix.jbi.cluster.engine.ClusterEndpointLoadTest.java

public void testLoadInOut() throws Exception {
    createRoute(Transacted.Jms, true, false, false);

    final int nbThreads = 10;
    final int nbExchanges = 10;
    final ReadWriteLock lock = new ReentrantReadWriteLock();
    final CountDownLatch latch = new CountDownLatch(nbThreads);
    lock.writeLock().lock();
    for (int i = 0; i < nbThreads; i++) {
        new Thread() {
            public void run() {
                Channel client = null;
                try {
                    client = nmr1.createChannel();
                    lock.readLock().lock();
                    for (int i = 0; i < nbExchanges; i++) {
                        Exchange exchange = client.createExchange(Pattern.InOut);
                        exchange.getIn().setBody(new StringSource("<hello/>"));
                        exchange.setTarget(nmr1.getEndpointRegistry()
                                .lookup(ServiceHelper.createMap(Endpoint.NAME, PROXY_ENDPOINT_NAME)));
                        client.sendSync(exchange);
                        assertEquals(Status.Active, exchange.getStatus());
                        exchange.setStatus(Status.Done);
                        client.send(exchange);
                    }/*from  ww  w  .j  a va 2s.  co  m*/
                } catch (Exception e) {
                    e.printStackTrace();
                } finally {
                    lock.readLock().unlock();
                    latch.countDown();
                    if (client != null) {
                        client.close();
                    }
                }
            }
        }.start();
    }

    cluster2.pause();
    lock.writeLock().unlock();
    Thread.sleep(0000);
    cluster2.resume();

    latch.await();

    receiver.assertExchangesReceived(nbThreads * nbExchanges * 2, TIMEOUT);
}

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

private static void createMergeView(@Nonnull final Connection conn, @Nonnull final String ddl,
        @Nonnull final ReadWriteLock rwlock) throws GridException {
    if (LOG.isInfoEnabled()) {
        LOG.info("Create a merge view: \n" + ddl);
    }/*w  w  w.  j a v a2  s  .  c  om*/
    final Lock wlock = rwlock.writeLock();
    try {
        wlock.lock();
        JDBCUtils.update(conn, ddl);
    } catch (SQLException e) {
        String errmsg = "failed running a reduce query: " + ddl;
        LOG.error(errmsg, e);
        try {
            conn.rollback();
        } catch (SQLException rbe) {
            LOG.warn("Rollback failed", rbe);
        }
        throw new GridException(errmsg, e);
    } finally {
        wlock.unlock();
    }
}

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From source file:org.apache.ambari.server.state.action.ActionImpl.java

public ActionImpl(ActionId id, long startTime) {
    super();/*from w w w  .j av  a2 s. c  om*/
    this.id = id;
    this.stateMachine = stateMachineFactory.make(this);
    ReadWriteLock rwLock = new ReentrantReadWriteLock();
    this.readLock = rwLock.readLock();
    this.writeLock = rwLock.writeLock();
    this.startTime = startTime;
    this.lastUpdateTime = -1;
    this.completionTime = -1;
}

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From source file:org.apache.servicemix.jbi.cluster.engine.ClusterEndpointLoadTest.java

public void testLoadInOnly() throws Exception {
    createRoute(Transacted.Jms, true, false, true);

    final int nbThreads = 10;
    final int nbExchanges = 10;
    final ReadWriteLock lock = new ReentrantReadWriteLock();
    final CountDownLatch latch = new CountDownLatch(nbThreads);
    final AtomicInteger id = new AtomicInteger();
    lock.writeLock().lock();
    for (int i = 0; i < nbThreads; i++) {
        new Thread() {
            public void run() {
                Channel client = null;
                try {
                    client = nmr1.createChannel();
                    lock.readLock().lock();
                    for (int i = 0; i < nbExchanges; i++) {
                        Exchange exchange = client.createExchange(Pattern.InOnly);
                        exchange.getIn()
                                .setBody(new StringSource("<hello id='" + id.getAndIncrement() + "'/>"));
                        exchange.setTarget(nmr1.getEndpointRegistry()
                                .lookup(ServiceHelper.createMap(Endpoint.NAME, PROXY_ENDPOINT_NAME)));
                        client.sendSync(exchange);
                        assertEquals(Status.Done, exchange.getStatus());
                    }/*from www. j a v  a  2 s  .  co  m*/
                } catch (Exception e) {
                    e.printStackTrace();
                } finally {
                    lock.readLock().unlock();
                    latch.countDown();
                    if (client != null) {
                        client.close();
                    }
                }
            }
        }.start();
    }

    long t0, t1;

    t0 = System.currentTimeMillis();
    lock.writeLock().unlock();

    latch.await();

    receiver.assertExchangesReceived(nbThreads * nbExchanges, TIMEOUT);

    t1 = System.currentTimeMillis();

    System.err.println("Elapsed time: " + (t1 - t0) + " ms");
    System.err.println("Throuput: " + (nbThreads * nbExchanges * 1000 / (t1 - t0)) + " messages/sec");
}

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From source file:org.apache.servicemix.jbi.cluster.engine.ReconnectTest.java

public void testLoadInOnly() throws Exception {
    createRoute(Transacted.Jms, true, false, false);

    final int nbThreads = 10;
    final int nbExchanges = 10;
    final ReadWriteLock lock = new ReentrantReadWriteLock();
    final CountDownLatch latch = new CountDownLatch(nbThreads);
    final AtomicInteger id = new AtomicInteger();
    lock.writeLock().lock();
    for (int i = 0; i < nbThreads; i++) {
        new Thread() {
            public void run() {
                Channel client = null;
                try {
                    client = nmr1.createChannel();
                    lock.readLock().lock();
                    for (int i = 0; i < nbExchanges; i++) {
                        Exchange exchange = client.createExchange(Pattern.InOnly);
                        exchange.getIn()
                                .setBody(new StringSource("<hello id='" + id.getAndIncrement() + "'/>"));
                        exchange.setTarget(nmr1.getEndpointRegistry()
                                .lookup(ServiceHelper.createMap(Endpoint.NAME, PROXY_ENDPOINT_NAME)));
                        client.sendSync(exchange);
                        assertEquals(Status.Done, exchange.getStatus());
                    }//from   ww w.  jav a 2  s .  c o  m
                } catch (Exception e) {
                    e.printStackTrace();
                } finally {
                    lock.readLock().unlock();
                    latch.countDown();
                    if (client != null) {
                        client.close();
                    }
                }
            }
        }.start();
    }

    long t0, t1;

    cluster2.pause();

    t0 = System.currentTimeMillis();
    lock.writeLock().unlock();

    latch.await();

    broker.stop();
    cluster2.resume();

    Thread.sleep(500);
    broker = createBroker(false);

    receiver.assertExchangesReceived(nbThreads * nbExchanges, TIMEOUT);
    //Thread.sleep(500);
    //receiver.assertExchangesReceived(nbThreads * nbExchanges, TIMEOUT);

    t1 = System.currentTimeMillis();

    System.err.println("Elapsed time: " + (t1 - t0) + " ms");
    System.err.println("Throuput: " + (nbThreads * nbExchanges * 1000 / (t1 - t0)) + " messages/sec");
}

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From source file:org.apache.ambari.resource.statemachine.ClusterImpl.java

public ClusterImpl(Cluster cluster, int revision) throws IOException {
    ReadWriteLock readWriteLock = new ReentrantReadWriteLock();
    this.readLock = readWriteLock.readLock();
    this.writeLock = readWriteLock.writeLock();
    this.stateMachine = stateMachineFactory.make(this);
    List<ServiceFSM> serviceImpls = new ArrayList<ServiceFSM>();
    for (String service : cluster.getClusterDefinition(revision).getEnabledServices()) {
        if (hasActiveRoles(cluster, service)) {
            ServiceImpl serviceImpl = new ServiceImpl(cluster.getComponentDefinition(service).getActiveRoles(),
                    this, service);

            serviceImpls.add(serviceImpl);
        }// w  w  w  .  ja  v  a 2 s  .  co  m
    }
    this.cls = cluster;
    this.services = serviceImpls;
}

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From source file:org.jactr.entry.Main.java

public void cleanUp(ACTRRuntime runtime) {

    if (runtime.getConnector().isRunning())
        try {//from  w ww  .  j  a v a 2 s .c o  m
            runtime.getConnector().stop();
        } catch (Exception e) {
            LOGGER.error("Failed to shutdown connector ", e);
        }

    /*
     * detach the current controller before we exit
     */
    runtime.setController(null);

    /*
     * and clean up
     */
    ArrayList<IModel> toDispose = new ArrayList<IModel>();
    for (IModel model : new ArrayList<IModel>(runtime.getModels())) {
        runtime.removeModel(model);
        toDispose.add(model);
    }

    /*
     * will kill the background threads..
     */
    ExecutorServices.shutdown(0);

    /*
     * and dispose. Why not dispose with the remove? listeners may still be
     * active even after the runtime has stopped. We dispose after the service
     * has been shutdown, making sure that all work has been completed
     */
    for (IModel model : toDispose) {
        ReadWriteLock lock = model.getLock();
        lock.writeLock().lock();

        try {
            model.dispose();
        } catch (Exception e) {
            LOGGER.error(String.format("Failed to dispose of %s cleanly. ", model), e);
        } finally {
            lock.writeLock().unlock();
        }
    }
}

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From source file:org.apache.giraph.ooc.data.OutOfCoreDataManager.java

/**
 * Offloads partition data of a given partition in the data store to disk
 *
 * @param partitionId id of the partition to offload its data
 * @param basePath path to offload the data to
 * @throws IOException/*from  w w w. j  a  va2s  . c o m*/
 */
@edu.umd.cs.findbugs.annotations.SuppressWarnings("UL_UNRELEASED_LOCK_EXCEPTION_PATH")
public void offloadPartitionData(int partitionId, String basePath) throws IOException {
    ReadWriteLock rwLock = getPartitionLock(partitionId);
    rwLock.writeLock().lock();
    hasPartitionDataOnDisk.add(partitionId);
    rwLock.writeLock().unlock();
    offloadInMemoryPartitionData(partitionId, getPath(basePath, partitionId));
}

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From source file:org.apache.hadoop.security.alias.JavaKeyStoreProvider.java

private JavaKeyStoreProvider(URI uri, Configuration conf) throws IOException {
    this.uri = uri;
    path = ProviderUtils.unnestUri(uri);
    fs = path.getFileSystem(conf);/*from   www  . j  a v  a 2 s. c o m*/
    // Get the password from the user's environment
    if (System.getenv().containsKey(CREDENTIAL_PASSWORD_NAME)) {
        password = System.getenv(CREDENTIAL_PASSWORD_NAME).toCharArray();
    }
    // if not in ENV get check for file
    if (password == null) {
        String pwFile = conf.get(KEYSTORE_PASSWORD_FILE_KEY);
        if (pwFile != null) {
            ClassLoader cl = Thread.currentThread().getContextClassLoader();
            URL pwdFile = cl.getResource(pwFile);
            if (pwdFile != null) {
                InputStream is = pwdFile.openStream();
                try {
                    password = IOUtils.toString(is).trim().toCharArray();
                } finally {
                    is.close();
                }
            }
        }
    }
    if (password == null) {
        password = KEYSTORE_PASSWORD_DEFAULT.toCharArray();
    }
    try {
        keyStore = KeyStore.getInstance(SCHEME_NAME);
        if (fs.exists(path)) {
            // save off permissions in case we need to
            // rewrite the keystore in flush()
            FileStatus s = fs.getFileStatus(path);
            permissions = s.getPermission();

            keyStore.load(fs.open(path), password);
        } else {
            permissions = new FsPermission("700");
            // required to create an empty keystore. *sigh*
            keyStore.load(null, password);
        }
    } catch (KeyStoreException e) {
        throw new IOException("Can't create keystore", e);
    } catch (NoSuchAlgorithmException e) {
        throw new IOException("Can't load keystore " + path, e);
    } catch (CertificateException e) {
        throw new IOException("Can't load keystore " + path, e);
    }
    ReadWriteLock lock = new ReentrantReadWriteLock(true);
    readLock = lock.readLock();
    writeLock = lock.writeLock();
}

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From source file:org.apache.hadoop.yarn.server.nodemanager.containermanager.localizer.LocalizedResource.java

public LocalizedResource(LocalResourceRequest rsrc, Dispatcher dispatcher) {
    this.rsrc = rsrc;
    this.dispatcher = dispatcher;
    this.ref = new LinkedList<ContainerId>();

    ReadWriteLock readWriteLock = new ReentrantReadWriteLock();
    this.readLock = readWriteLock.readLock();
    this.writeLock = readWriteLock.writeLock();

    this.stateMachine = stateMachineFactory.make(this);
}

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