Example usage for java.util.concurrent.locks ReentrantReadWriteLock ReentrantReadWriteLock

Introduction

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

Prototype

public ReentrantReadWriteLock() 

Source Link

Document

Creates a new ReentrantReadWriteLock with default (nonfair) ordering properties.

Usage

From source file:org.apache.tajo.master.querymaster.Stage.java

public Stage(QueryMasterTask.QueryMasterTaskContext context, MasterPlan masterPlan, ExecutionBlock block) {
    this.context = context;
    this.masterPlan = masterPlan;
    this.block = block;
    this.eventHandler = context.getEventHandler();

    ReadWriteLock readWriteLock = new ReentrantReadWriteLock();
    this.readLock = readWriteLock.readLock();
    this.writeLock = readWriteLock.writeLock();
    stateMachine = stateMachineFactory.make(this);
    stageState = stateMachine.getCurrentState();
}

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

public ContainerManagerImpl(Context context, ContainerExecutor exec, DeletionService deletionContext,
        NodeStatusUpdater nodeStatusUpdater, NodeManagerMetrics metrics, LocalDirsHandlerService dirsHandler) {
    super(ContainerManagerImpl.class.getName());
    this.context = context;
    this.dirsHandler = dirsHandler;

    // ContainerManager level dispatcher.
    dispatcher = new AsyncDispatcher();
    this.deletionService = deletionContext;
    this.metrics = metrics;

    rsrcLocalizationSrvc = createResourceLocalizationService(exec, deletionContext, context);
    addService(rsrcLocalizationSrvc);//from   w w w.j  av  a 2 s.  c om

    containersLauncher = createContainersLauncher(context, exec);
    addService(containersLauncher);

    this.exec = exec;

    this.nodeStatusUpdater = nodeStatusUpdater;

    // Start configurable services
    auxiliaryServices = new AuxServices();
    auxiliaryServices.registerServiceListener(this);
    addService(auxiliaryServices);

    this.containersMonitor = new ContainersMonitorImpl(exec, dispatcher, this.context);
    addService(this.containersMonitor);

    dispatcher.register(ContainerEventType.class, new ContainerEventDispatcher());
    dispatcher.register(ApplicationEventType.class, new ApplicationEventDispatcher());
    dispatcher.register(LocalizationEventType.class, rsrcLocalizationSrvc);
    dispatcher.register(AuxServicesEventType.class, auxiliaryServices);
    dispatcher.register(ContainersMonitorEventType.class, containersMonitor);
    dispatcher.register(ContainersLauncherEventType.class, containersLauncher);

    addService(dispatcher);

    ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
    this.readLock = lock.readLock();
    this.writeLock = lock.writeLock();

    this.cryptoMaterialUpdaterThreadPool = Executors.newFixedThreadPool(3, new ThreadFactoryBuilder()
            .setDaemon(true).setNameFormat("Container crypto material updater thread #%d").build());
}

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From source file:org.apache.tajo.master.querymaster.SubQuery.java

public SubQuery(QueryMasterTask.QueryMasterTaskContext context, MasterPlan masterPlan, ExecutionBlock block,
        StorageManager sm) {/* ww w.j a v  a2  s .com*/
    this.context = context;
    this.masterPlan = masterPlan;
    this.block = block;
    this.sm = sm;
    this.eventHandler = context.getEventHandler();

    ReadWriteLock readWriteLock = new ReentrantReadWriteLock();
    this.readLock = readWriteLock.readLock();
    this.writeLock = readWriteLock.writeLock();
    stateMachine = stateMachineFactory.make(this);
    subQueryState = stateMachine.getCurrentState();
}

---

From source file:org.apache.tez.dag.app.dag.impl.DAGImpl.java

public DAGImpl(TezDAGID dagId, TezConfiguration conf, DAGPlan jobPlan, EventHandler eventHandler,
        TaskAttemptListener taskAttemptListener, JobTokenSecretManager jobTokenSecretManager,
        Credentials fsTokenCredentials, Clock clock, String appUserName, TaskHeartbeatHandler thh,
        AppContext appContext) {/*from w ww . jav  a 2  s .  c om*/
    this.dagId = dagId;
    this.jobPlan = jobPlan;
    this.conf = conf;
    this.dagName = (jobPlan.getName() != null) ? jobPlan.getName() : "<missing app name>";

    this.userName = appUserName;
    this.clock = clock;
    this.appContext = appContext;
    this.queueName = conf.get(MRJobConfig.QUEUE_NAME, "default");

    this.taskAttemptListener = taskAttemptListener;
    this.taskHeartbeatHandler = thh;
    this.eventHandler = eventHandler;
    ReadWriteLock readWriteLock = new ReentrantReadWriteLock();
    this.readLock = readWriteLock.readLock();
    this.writeLock = readWriteLock.writeLock();

    this.fsTokens = fsTokenCredentials;
    this.jobTokenSecretManager = jobTokenSecretManager;

    this.aclsManager = new ApplicationACLsManager(conf);

    // This "this leak" is okay because the retained pointer is in an
    //  instance variable.
    stateMachine = stateMachineFactory.make(this);
}

---

From source file:org.apache.tajo.querymaster.Stage.java

public Stage(QueryMasterTask.QueryMasterTaskContext context, MasterPlan masterPlan, ExecutionBlock block) {
    this.context = context;
    this.masterPlan = masterPlan;
    this.block = block;
    this.eventHandler = context.getEventHandler();

    this.rpcParams = RpcParameterFactory.get(context.getConf());

    ReadWriteLock readWriteLock = new ReentrantReadWriteLock();
    this.readLock = readWriteLock.readLock();
    this.writeLock = readWriteLock.writeLock();
    stateMachine = stateMachineFactory.make(this);
    stageState = stateMachine.getCurrentState();
}

---

From source file:org.apache.hadoop.mapreduce.v2.app.job.impl.TaskImpl.java

public TaskImpl(JobId jobId, TaskType taskType, int partition, EventHandler eventHandler,
        Path remoteJobConfFile, JobConf conf, TaskAttemptListener taskAttemptListener,
        Token<JobTokenIdentifier> jobToken, Credentials credentials, Clock clock, int appAttemptId,
        MRAppMetrics metrics, AppContext appContext) {
    this.conf = conf;
    this.clock = clock;
    this.jobFile = remoteJobConfFile;
    ReadWriteLock readWriteLock = new ReentrantReadWriteLock();
    readLock = readWriteLock.readLock();
    writeLock = readWriteLock.writeLock();
    this.attempts = Collections.emptyMap();
    this.finishedAttempts = new HashSet<TaskAttemptId>(2);
    this.failedAttempts = new HashSet<TaskAttemptId>(2);
    this.inProgressAttempts = new HashSet<TaskAttemptId>(2);
    // This overridable method call is okay in a constructor because we
    //  have a convention that none of the overrides depends on any
    //  fields that need initialization.
    maxAttempts = getMaxAttempts();//  ww  w. java  2 s. c  o m
    taskId = MRBuilderUtils.newTaskId(jobId, partition, taskType);
    this.partition = partition;
    this.taskAttemptListener = taskAttemptListener;
    this.eventHandler = eventHandler;
    this.credentials = credentials;
    this.jobToken = jobToken;
    this.metrics = metrics;
    this.appContext = appContext;
    this.encryptedShuffle = conf.getBoolean(MRConfig.SHUFFLE_SSL_ENABLED_KEY,
            MRConfig.SHUFFLE_SSL_ENABLED_DEFAULT);

    // This "this leak" is okay because the retained pointer is in an
    //  instance variable.
    stateMachine = stateMachineFactory.make(this);

    // All the new TaskAttemptIDs are generated based on MR
    // ApplicationAttemptID so that attempts from previous lives don't
    // over-step the current one. This assumes that a task won't have more
    // than 1000 attempts in its single generation, which is very reasonable.
    nextAttemptNumber = (appAttemptId - 1) * 1000;
}

---

From source file:com.edgenius.wiki.rss.RSSServiceImpl.java

/**
 * @param spaceUid//  w  ww  . j ava  2  s.  c  o m
 * @param spaceUname
 * @param viewer
 * @param skipSecurityCheck 
 * @return
 * @throws FeedException
 */
private Document getFeedDom(Integer spaceUid, String spaceUname, User viewer, boolean skipSecurityCheck)
        throws FeedException {
    ReentrantReadWriteLock lock = null;
    Document dom;
    try {

        File feedFile = new File(FileUtil.getFullPath(rssRoot.getFile().getAbsolutePath(), spaceUid + ".xml"));
        if (!feedFile.exists()) {
            createFeed(spaceUname);
        }

        //do read lock! must after createFeed possibility, otherwise, deadlock 
        lock = lockMap.get(spaceUid.toString());
        if (lock == null) {
            lock = new ReentrantReadWriteLock();
            lockMap.put(spaceUid.toString(), lock);
        }
        lock.readLock().lock();
        //!!! DON'T USE JDOM - although I test DOM, JDOM, DOM4J: JDOM is fastest. And DOM and DOM4J almost 2 time slow. But
        //!!! JDOM is not thread safe, an infinite looping can happen while this method reading different XML source, 
        //in different thread, and SAXBuild are different instance! The problem is mostly caused by NameSpace.getNamespace(), 
        //which using static HashMap and cause HashMap dead lock!!!
        DocumentBuilder builder = xmlBuilderPool.poll();
        if (builder == null) {
            DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
            factory.setValidating(false);
            factory.setCoalescing(true);
            factory.setIgnoringComments(true);
            builder = factory.newDocumentBuilder();
        }
        dom = builder.parse(feedFile);
        xmlBuilderPool.add(builder);

    } catch (Exception e) {
        log.error("Unable get feed " + spaceUname + " with excpetion ", e);
        throw new FeedException("Unable get feed " + spaceUname + " with excpetion " + e);
    } finally {
        if (lock != null)
            lock.readLock().unlock();
    }
    if (dom == null) {
        log.error("Unable get feed " + spaceUname);
        throw new FeedException("Unable get feed " + spaceUname);
    }

    //~~~~~~~~~~~~ Security filter
    if (!skipSecurityCheck) {
        //need filter out the page that viewer has not permission to read.  
        List<Node> forbidPageUuidList = new ArrayList<Node>();
        String pageUuid;
        Node ele;
        NodeList list = dom.getElementsByTagName(PageRSSModule.NS_PREFIX + ":" + PageRSSModule.PAGE_UUID);
        int len = list.getLength();
        for (int idx = 0; idx < len; idx++) {
            ele = list.item(idx);
            pageUuid = ele.getTextContent();
            if (!securityService.isAllowPageReading(spaceUname, pageUuid, viewer)) {
                log.info("User " + (viewer == null ? "anonymous" : viewer.getUsername())
                        + "  has not reading permission for pageUuid " + pageUuid + " on space " + spaceUname
                        + ". Feed item of this page is removed from RSS output.");
                forbidPageUuidList.add(ele.getParentNode());
            }

        }
        if (forbidPageUuidList.size() > 0) {
            NodeList cl = dom.getElementsByTagName(PageRSSModule.CHANNEL);
            if (cl.getLength() > 0) {
                //only one channel tag!
                Node channel = cl.item(0);
                for (Node element : forbidPageUuidList) {
                    channel.removeChild(element);
                }
            }
        }
    }
    return dom;
}

---

From source file:org.apache.tez.dag.app.rm.container.AMContainerImpl.java

public AMContainerImpl(Container container, ContainerHeartbeatHandler chh, TaskAttemptListener tal,
        AppContext appContext) {/*from   w ww  . ja  v a  2s  .  co  m*/
    ReentrantReadWriteLock rwLock = new ReentrantReadWriteLock();
    this.readLock = rwLock.readLock();
    this.writeLock = rwLock.writeLock();
    this.container = container;
    this.containerId = container.getId();
    this.eventHandler = appContext.getEventHandler();
    this.appContext = appContext;
    this.containerHeartbeatHandler = chh;
    this.taskAttemptListener = tal;
    this.failedAssignments = new LinkedList<TezTaskAttemptID>();

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

---

From source file:org.apache.tez.dag.app.dag.impl.VertexImpl.java

public VertexImpl(TezVertexID vertexId, VertexPlan vertexPlan, String vertexName, TezConfiguration conf,
        EventHandler eventHandler, TaskAttemptListener taskAttemptListener, Token<JobTokenIdentifier> jobToken,
        Credentials fsTokenCredentials, Clock clock,
        // TODO: Recovery
        //Map<TaskId, TaskInfo> completedTasksFromPreviousRun,
        // TODO Metrics
        //MRAppMetrics metrics,
        TaskHeartbeatHandler thh, AppContext appContext, VertexLocationHint vertexLocationHint) {
    this.vertexId = vertexId;
    this.vertexPlan = vertexPlan;
    this.vertexName = vertexName;
    this.conf = conf;
    //this.metrics = metrics;
    this.clock = clock;
    // TODO: Recovery
    //this.completedTasksFromPreviousRun = completedTasksFromPreviousRun;
    this.appContext = appContext;

    this.taskAttemptListener = taskAttemptListener;
    this.taskHeartbeatHandler = thh;
    this.eventHandler = eventHandler;
    ReadWriteLock readWriteLock = new ReentrantReadWriteLock();
    this.readLock = readWriteLock.readLock();
    this.writeLock = readWriteLock.writeLock();

    this.fsTokens = fsTokenCredentials;
    this.jobToken = jobToken;
    this.committer = new NullVertexOutputCommitter();
    this.vertexLocationHint = vertexLocationHint;

    this.taskResource = DagTypeConverters.createResourceRequestFromTaskConfig(vertexPlan.getTaskConfig());
    this.processorDescriptor = DagTypeConverters
            .convertProcessorDescriptorFromDAGPlan(vertexPlan.getProcessorDescriptor());
    this.localResources = DagTypeConverters
            .createLocalResourceMapFromDAGPlan(vertexPlan.getTaskConfig().getLocalResourceList());
    this.environment = DagTypeConverters
            .createEnvironmentMapFromDAGPlan(vertexPlan.getTaskConfig().getEnvironmentSettingList());
    this.javaOpts = vertexPlan.getTaskConfig().hasJavaOpts() ? vertexPlan.getTaskConfig().getJavaOpts() : null;

    this.vertexContext = new VertexContext(getDAGId(), this.processorDescriptor.getUserPayload(), this.vertexId,
            getApplicationAttemptId());//from w ww . j a va2  s .  co m

    // This "this leak" is okay because the retained pointer is in an
    //  instance variable.
    stateMachine = stateMachineFactory.make(this);
}

---

From source file:org.rhq.core.pc.inventory.ResourceContainer.java

private Object readResolve() throws java.io.ObjectStreamException {
    this.facetAccessLock = new ReentrantReadWriteLock();
    return this;
}

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