java.util.concurrent.locks.ReentrantReadWriteLock Java Examples

public HiveCommon ()
{
    final ReentrantReadWriteLock itemMapLock = new ReentrantReadWriteLock ( Boolean.getBoolean ( "org.eclipse.scada.da.server.common.fairItemMapLock" ) );

    this.itemMapReadLock = itemMapLock.readLock ();
    this.itemMapWriteLock = itemMapLock.writeLock ();

    this.subscriptionValidator = new SubscriptionValidator<String> () {

        @Override
        public boolean validate ( final SubscriptionListener<String> listener, final String topic )
        {
            return validateItem ( topic );
        }
    };
}
 

SimpleBufferTrigger(SimpleBufferTriggerBuilder<E, C> builder) {
    this.queueAdder = builder.queueAdder;
    this.bufferFactory = builder.bufferFactory;
    this.consumer = builder.consumer;
    this.exceptionHandler = builder.exceptionHandler;
    this.maxBufferCount = builder.maxBufferCount;
    this.rejectHandler = builder.rejectHandler;
    this.buffer.set(this.bufferFactory.get());
    if (!builder.disableSwitchLock) {
        ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
        readLock = lock.readLock();
        writeLock = lock.writeLock();
        writeCondition = writeLock.newCondition();
    } else {
        readLock = null;
        writeLock = null;
        writeCondition = null;
    }
    builder.scheduledExecutorService.schedule(
            new TriggerRunnable(builder.scheduledExecutorService, builder.triggerStrategy),
            DEFAULT_NEXT_TRIGGER_PERIOD, MILLISECONDS);
}
 

public StorageDirect2(Volume.Factory volFac, boolean readOnly) {
    this.readOnly = readOnly;

    locks = new ReentrantReadWriteLock[CONCURRENCY_FACTOR];
    for(int i=0;i<locks.length;i++) locks[i] = new ReentrantReadWriteLock();
    freeSpaceLock = new ReentrantLock();

    index = volFac.createIndexVolume();
    phys = volFac.createPhysVolume();
    if(index.isEmpty()){
        createStructure();
    }else{
        checkHeaders();
    }

}
 

@Override
public boolean load() {
    try {
        InstantFixClassMap.setClassLoader(getClass().getClassLoader());
        HashMap<Integer, ReadWriteLock> lockMap = new HashMap<>();
        HashMap<Integer, String> classIndexMap = new HashMap<>();
        String[] patchedClasses = getPatchedClasses();
        int[] patchedClassIndexes = getPatchedClassIndexes();
        if (patchedClasses.length != patchedClassIndexes.length) {
            throw new IllegalArgumentException("patchedClasses's len is " + patchedClasses.length + ", but patchedClassIndexs's len is " + patchedClassIndexes.length);
        }
        for (int i = 0; i < patchedClasses.length; i++) {
            String className = patchedClasses[i];
            int classIndex = patchedClassIndexes[i];
            lockMap.put(classIndex, new ReentrantReadWriteLock());
            classIndexMap.put(classIndex, className);
            Log.i(TAG, String.format("patched %s", className));
        }
        InstantFixClassMap.setAtomMap(new InstantFixClassMap.AtomMap(classIndexMap, lockMap));
    } catch (Throwable e) {
        e.printStackTrace();
        return false;
    }
    return true;
}
 

private void reset()
{
    graph = null;
    incidenceCache = null;
    liveHandles = null;
    liveHandlesTx = null;
    atoms = null;
    atomsTx = null;
    frozenAtoms = null;
    coldAtoms = new ColdAtoms();
    gcLock = new ReentrantReadWriteLock();
    refQueue = new ReferenceQueue<Object>();
    cleanupThread = null;
    cleanupTxConfig = new HGTransactionConfig();
    phantomQueuePollInterval = DEFAULT_PHANTOM_QUEUE_POLL_INTERVAL;
    closing = false;
}
 

public TaskImpl(TezVertexID vertexId, int taskIndex,
    EventHandler eventHandler, Configuration conf,
    TaskAttemptListener taskAttemptListener,
    Clock clock, TaskHeartbeatHandler thh, AppContext appContext,
    boolean leafVertex, Resource resource,
    ContainerContext containerContext) {
  this.conf = conf;
  this.clock = clock;
  ReadWriteLock readWriteLock = new ReentrantReadWriteLock();
  readLock = readWriteLock.readLock();
  writeLock = readWriteLock.writeLock();
  this.attempts = Collections.emptyMap();
  // TODO Avoid reading this from configuration for each task.
  maxFailedAttempts = this.conf.getInt(TezConfiguration.TEZ_AM_TASK_MAX_FAILED_ATTEMPTS,
                            TezConfiguration.TEZ_AM_TASK_MAX_FAILED_ATTEMPTS_DEFAULT);
  taskId = TezTaskID.getInstance(vertexId, taskIndex);
  this.taskAttemptListener = taskAttemptListener;
  this.taskHeartbeatHandler = thh;
  this.eventHandler = eventHandler;
  this.appContext = appContext;

  this.leafVertex = leafVertex;
  this.taskResource = resource;
  this.containerContext = containerContext;
  stateMachine = stateMachineFactory.make(this);
}
 

@Inject
public PeerExchangePeerSourceFactory(EventSource eventSource,
                                     IRuntimeLifecycleBinder lifecycleBinder,
                                     PeerExchangeConfig config) {
    this.peerSources = new ConcurrentHashMap<>();
    this.peerEvents = new ConcurrentHashMap<>();
    this.rwLock = new ReentrantReadWriteLock();
    this.peers = ConcurrentHashMap.newKeySet();
    this.lastSentPEXMessage = new ConcurrentHashMap<>();
    if (config.getMaxMessageInterval().compareTo(config.getMinMessageInterval()) < 0) {
        throw new IllegalArgumentException("Max message interval is greater than min interval");
    }
    this.minMessageInterval = config.getMinMessageInterval();
    this.maxMessageInterval = config.getMaxMessageInterval();
    this.minEventsPerMessage = config.getMinEventsPerMessage();
    this.maxEventsPerMessage = config.getMaxEventsPerMessage();

    eventSource.onPeerConnected(e -> onPeerConnected(e.getConnectionKey()))
            .onPeerDisconnected(e -> onPeerDisconnected(e.getConnectionKey()));

    ScheduledExecutorService executor =
            Executors.newSingleThreadScheduledExecutor(r -> new Thread(r, "bt.peerexchange.cleaner"));
    lifecycleBinder.onStartup("Schedule periodic cleanup of PEX messages", () -> executor.scheduleAtFixedRate(
            new Cleaner(), CLEANER_INTERVAL.toMillis(), CLEANER_INTERVAL.toMillis(), TimeUnit.MILLISECONDS));
    lifecycleBinder.onShutdown("Shutdown PEX cleanup scheduler", executor::shutdownNow);
}
 

protected  <B extends Builder<B>> HollowConsumer(B builder) {
    // duplicated with HollowConsumer(...) constructor above. We cannot chain constructor calls because that
    // constructor subscribes to the announcement watcher and we have more setup to do first
    this.metrics = new HollowConsumerMetrics();
    this.updater = new HollowClientUpdater(builder.blobRetriever,
            builder.refreshListeners,
            builder.apiFactory,
            builder.doubleSnapshotConfig,
            builder.hashCodeFinder,
            builder.objectLongevityConfig,
            builder.objectLongevityDetector,
            metrics,
            builder.metricsCollector);
    updater.setFilter(builder.typeFilter);
    this.announcementWatcher = builder.announcementWatcher;
    this.refreshExecutor = builder.refreshExecutor;
    this.refreshLock = new ReentrantReadWriteLock();
    if (announcementWatcher != null)
        announcementWatcher.subscribeToUpdates(this);
}
 

public QueryInProgress(
    TajoMaster.MasterContext masterContext,
    Session session,
    QueryContext queryContext,
    QueryId queryId, String sql, String jsonExpr, LogicalRootNode plan) {

  this.masterContext = masterContext;
  this.session = session;
  this.queryId = queryId;
  this.plan = plan;

  queryInfo = new QueryInfo(queryId, queryContext, sql, jsonExpr);
  queryInfo.setStartTime(System.currentTimeMillis());

  rpcParams = RpcParameterFactory.get(masterContext.getConf());

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

protected Segment(CellComparator comparator, List<ImmutableSegment> segments,
    TimeRangeTracker trt) {
  long dataSize = 0;
  long heapSize = 0;
  long OffHeapSize = 0;
  int cellsCount = 0;
  for (Segment segment : segments) {
    MemStoreSize memStoreSize = segment.getMemStoreSize();
    dataSize += memStoreSize.getDataSize();
    heapSize += memStoreSize.getHeapSize();
    OffHeapSize += memStoreSize.getOffHeapSize();
    cellsCount += memStoreSize.getCellsCount();
  }
  this.comparator = comparator;
  this.updatesLock = new ReentrantReadWriteLock();
  // Do we need to be thread safe always? What if ImmutableSegment?
  // DITTO for the TimeRangeTracker below.
  this.memStoreSizing = new ThreadSafeMemStoreSizing(dataSize, heapSize, OffHeapSize, cellsCount);
  this.timeRangeTracker = trt;
}
 

private ReentrantReadWriteLock returnLockForKey(String key) throws IllegalStateException {
    ReentrantReadWriteLock lock;
    generalLock.lock();
    try {
        lock = liveLocks.get(key);
        if (lock == null) {
            LOGGER.log(Level.SEVERE, "no lock object exists for key {0}", key);
            throw new IllegalStateException("no lock object exists for key " + key);
        }
        int actualCount = locksCounter.get(key).decrementAndGet();
        if (actualCount == 0) {
            liveLocks.remove(key);
            locksCounter.remove(key);
        }
    } finally {
        generalLock.unlock();
    }
    return lock;
}
 

@Override
protected void configure()
{
    bind(String.class).annotatedWith(Names.named(CoreModule.MODULE_NAME))
        .toInstance(LinStor.SATELLITE_MODULE);

    bind(ReadWriteLock.class).annotatedWith(Names.named(STLT_CONF_LOCK))
        .toInstance(new ReentrantReadWriteLock(true));

    bind(ControllerPeerConnector.class).to(ControllerPeerConnectorImpl.class);
    // bind(UpdateMonitor.class).to(UpdateMonitorImpl.class);
    // bind(DeviceManager.class).to(DeviceManagerImpl.class);
    // install(new FactoryModuleBuilder()
    //    .implement(DeviceManagerImpl.DeviceHandlerInvocation.class,
    //       DeviceManagerImpl.DeviceHandlerInvocation.class)
    //    .build(DeviceManagerImpl.DeviceHandlerInvocationFactory.class));

    bind(Path.class).annotatedWith(Names.named(DRBD_CONFIG_PATH)).toInstance(
        FileSystems.getDefault().getPath(CoreModule.CONFIG_PATH)
    );
}
 

public SortedOplogSetImpl(final SortedOplogFactory factory, Executor exec, Compactor ctor) throws IOException {
  this.factory = factory;
  this.flusher = new AbortableTaskService(exec);
  this.compactor = ctor;
  
  rwlock = new ReentrantReadWriteLock();
  bufferCount = new AtomicInteger(0);
  unflushed = new ArrayDeque<SortedBuffer<Integer>>();
  current = new AtomicReference<SortedBuffer<Integer>>(
      new SortedBuffer<Integer>(factory.getConfiguration(), 0));
  
  logger = ComponentLogWriter.getSoplogLogWriter(factory.getConfiguration().getName(), LogService.logger());
  if (logger.fineEnabled()) {
    logger.fine("Creating soplog set");
  }
}
 

/**
 * Construct a new repository with the given default domain.
 */
public Repository(String domain, boolean fairLock) {
    lock = new ReentrantReadWriteLock(fairLock);

    domainTb = new HashMap<String,Map<String,NamedObject>>(5);

    if (domain != null && domain.length() != 0)
        this.domain = domain.intern(); // we use == domain later on...
    else
        this.domain = ServiceName.DOMAIN;

    // Creates a new hashtable for the default domain
    domainTb.put(this.domain, new HashMap<String,NamedObject>());
}
 

public List<MapleReactor> getAllReactorsThreadsafe() {
    ArrayList ret = new ArrayList();
    ((ReentrantReadWriteLock) this.mapobjectlocks.get(MapleMapObjectType.REACTOR)).readLock().lock();
    try {
        for (MapleMapObject mmo : mapobjects.get(MapleMapObjectType.REACTOR).values()) {
            ret.add((MapleReactor) mmo);
        }
    } finally {
        ((ReentrantReadWriteLock) this.mapobjectlocks.get(MapleMapObjectType.REACTOR)).readLock().unlock();
    }
    return ret;
}
 

public StratumMineBlockTaskBuilderCore(final Integer totalExtraNonceByteCount, final TransactionDeflater transactionDeflater) {
    _totalExtraNonceByteCount = totalExtraNonceByteCount;
    _transactionDeflater = transactionDeflater;

    final ReentrantReadWriteLock readWriteLock = new ReentrantReadWriteLock();
    _prototypeBlockReadLock = readWriteLock.readLock();
    _prototypeBlockWriteLock = readWriteLock.writeLock();

    _initPrototypeBlock();
}
 

public AbstractBlobCache(
		final Configuration blobClientConfig,
		final BlobView blobView,
		final Logger logger,
		@Nullable final InetSocketAddress serverAddress) throws IOException {

	this.log = checkNotNull(logger);
	this.blobClientConfig = checkNotNull(blobClientConfig);
	this.blobView = checkNotNull(blobView);
	this.readWriteLock = new ReentrantReadWriteLock();

	// configure and create the storage directory
	this.storageDir = BlobUtils.initLocalStorageDirectory(blobClientConfig);
	log.info("Created BLOB cache storage directory " + storageDir);

	// configure the number of fetch retries
	final int fetchRetries = blobClientConfig.getInteger(BlobServerOptions.FETCH_RETRIES);
	if (fetchRetries >= 0) {
		this.numFetchRetries = fetchRetries;
	} else {
		log.warn("Invalid value for {}. System will attempt no retries on failed fetch operations of BLOBs.",
			BlobServerOptions.FETCH_RETRIES.key());
		this.numFetchRetries = 0;
	}

	// Add shutdown hook to delete storage directory
	shutdownHook = ShutdownHookUtil.addShutdownHook(this, getClass().getSimpleName(), log);

	this.serverAddress = serverAddress;
}
 

public BandwidthDispatcher(final int threadPauseInterval, final RandomSpeedProvider randomSpeedProvider) {
    this.threadPauseInterval = threadPauseInterval;
    this.torrentsSeedStats = new HashMap<>();
    this.speedMap = new HashMap<>();
    this.lock = new ReentrantReadWriteLock();


    this.weightHolder = new WeightHolder<>(new PeersAwareWeightCalculator());
    this.randomSpeedProvider = randomSpeedProvider;
}
 

public String switchMaster(String writeHost, boolean syncWriteConf) {
    final ReentrantReadWriteLock lock = DbleServer.getInstance().getConfig().getLock();
    lock.readLock().lock();
    adjustLock.writeLock().lock();
    try {
        HaConfigManager.getInstance().updateConfDataHost(createSwitchSnapshot(writeHost), syncWriteConf);

        PhysicalDataSource newWriteHost = allSourceMap.get(writeHost);
        writeSource.setReadNode(true);
        //close all old master connection ,so that new write query would not put into the old writeHost
        writeSource.clearCons("ha command switch datasource");
        if (!newWriteHost.isDisabled()) {
            GetAndSyncDataSourceKeyVariables task = new GetAndSyncDataSourceKeyVariables(newWriteHost, true);
            KeyVariables variables = task.call();
            if (variables != null) {
                newWriteHost.setReadOnly(variables.isReadOnly());
            } else {
                LOGGER.warn(" GetAndSyncDataSourceKeyVariables failed, set newWriteHost ReadOnly");
                newWriteHost.setReadOnly(true);
            }
        }
        newWriteHost.setReadNode(false);
        writeSource = newWriteHost;
        return this.getClusterHaJson();
    } catch (Exception e) {
        LOGGER.warn("switchMaster Exception ", e);
        throw e;
    } finally {
        lock.readLock().unlock();
        adjustLock.writeLock().unlock();
    }
}
 

private Lock getOrCreateLock(ThriftCacheKey<?> key) {
  Lock lock = _lockMap.get(key);
  if (lock == null) {
    Lock nLock = new ReentrantReadWriteLock().writeLock();
    Lock pLock = _lockMap.putIfAbsent(key, new InternalLock(nLock, _lockMap, key));
    if (pLock == null) {
      return nLock;
    } else {
      return pLock;
    }
  } else {
    return lock;
  }
}
 

@Test
public void file_try_with_resources() {
    String path = "test.sbx";
    SecretIdentifier secretIdentifier1 = new SecretIdentifier("MySecret");
    long version1 = 1;
    State state1 = State.ENABLED;
    byte[] payload = Encoder.asUTF8("encryptedPayload");
    RawSecretEntry entry1 = new RawSecretEntry(secretIdentifier1, version1, state1, Optional.empty(), Optional.empty(), payload);

    SecretIdentifier secretIdentifier2 = new SecretIdentifier("MySecret2");
    long version2 = 2;
    Optional<ZonedDateTime> notBeforeValue = Optional.of(ZonedDateTime.of(2016, 5, 4, 2, 0 ,0, 0, ZoneId.of("UTC")));
    RawSecretEntry entry2 = new RawSecretEntry(secretIdentifier2, version2, state1, notBeforeValue, Optional.empty(), payload);

    try (File store = new File(new java.io.File(path), new DummyEncryptor(), new FileEncryptionContext(group), new ReentrantReadWriteLock())) {
        if (store.exists()) {
            store.delete();
        }
        store.create(entry1);
        store.create(entry2);
    } // auto closeable should write the results to disk when exiting the try clause, and thus be readable in the next section

    try (File file = new File(new java.io.File(path), new DummyEncryptor(), new FileEncryptionContext(group), new ReentrantReadWriteLock())) {
        List<RawSecretEntry> list = file.stream().toList();
        boolean t = list.get(1).equals(entry2);
        assertThat(list, containsInAnyOrder(entry1, entry2));
    }

    java.io.File f = new java.io.File(path);
    if (!f.delete()) {
        throw new UnexpectedStateException(path, "EXISTS", "DELETED", "File store deletion failed");
    }
}
 

public NodeDescriptor(String nodeID, boolean preferHostname, boolean local) {

		// Init final properties
		this.nodeID = nodeID;
		this.preferHostname = preferHostname;
		this.local = local;

		// Init locks
		ReentrantReadWriteLock lock = new ReentrantReadWriteLock(false);
		readLock = lock.readLock();
		writeLock = lock.writeLock();
	}
 

/**
 * Construct a new repository with the given default domain.
 */
public Repository(String domain, boolean fairLock) {
    lock = new ReentrantReadWriteLock(fairLock);

    domainTb = new HashMap<String,Map<String,NamedObject>>(5);

    if (domain != null && domain.length() != 0)
        this.domain = domain.intern(); // we use == domain later on...
    else
        this.domain = ServiceName.DOMAIN;

    // Creates a new hashtable for the default domain
    domainTb.put(this.domain, new HashMap<String,NamedObject>());
}
 

public Worker(TajoRMContext rmContext, WorkerResource resource) {
  this.rmContext = rmContext;

  this.lastHeartbeatTime = System.currentTimeMillis();
  this.resource = resource;

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

/**
 * Adds the result file.
 *
 * @param resultFile the result file
 */
public void addResultFile( ResultFile resultFile ) {
  ReentrantReadWriteLock.WriteLock lock = resultFilesLock.writeLock();
  lock.lock();
  try {
    resultFiles.put( resultFile.getFile().toString(), resultFile );
  } finally {
    lock.unlock();
  }
}
 

/**
 * Creates a new {@link ResettingExponentiallyDecayingReservoir}.
 *
 * @param size  the number of samples to keep in the sampling reservoir
 * @param alpha the exponential decay factor; the higher this is, the more biased the reservoir
 *              will be towards newer values
 * @param clock the clock used to timestamp samples and track rescaling
 */
public ResettingExponentiallyDecayingReservoir(int size, double alpha, Clock clock) {
    this.values = new ConcurrentSkipListMap<Double, WeightedSample>();
    this.lock = new ReentrantReadWriteLock();
    this.alpha = alpha;
    this.size = size;
    this.clock = clock;
    this.count = new AtomicLong(0);
    this.startTime = currentTimeInSeconds();
    this.nextScaleTime = new AtomicLong(clock.getTick() + RESCALE_THRESHOLD);
}
 

/**
 * Index
 * 
 * @param containerURI
 * @param reuseExistingFile
 * @throws IOException
 */
protected Index(URI containerURI, boolean reuseExistingFile) throws IOException
{
	this.containerURI = containerURI;

	this.memoryIndex = new MemoryIndex();
	this.monitor = new ReentrantReadWriteLock();

	// Convert to a filename we can use for the actual index on disk
	IPath diskIndexPath = computeIndexLocation(containerURI);
	if (diskIndexPath == null)
	{
		return;
	}
	String diskIndexPathString = (diskIndexPath.getDevice() == null) ? diskIndexPath.toString() : diskIndexPath
			.toOSString();
	this.enterWrite();
	try
	{
		this.diskIndex = new DiskIndex(diskIndexPathString);
		this.diskIndex.initialize(reuseExistingFile);
	}
	finally
	{
		this.exitWrite();
	}
}
 

/**
 * Create a new instance
 * @param stopper the cancellation criterion
 */
public StoppableReentrantReadWriteLock(CancelCriterion stopper) {
  Assert.assertTrue(stopper != null);
  ReadWriteLock lock = new ReentrantReadWriteLock();
  this.readLock = new StoppableReadLock(lock, stopper);
  this.writeLock = new StoppableWriteLock(lock, stopper);
}
 

/**
 * @param extensions Immutable list of callbacks to extend stats behavior.
 */
public StatsInfo(List<AbstractStatsExtension> extensions) {
  rwLock = new ReentrantReadWriteLock(true);
  doWithLock(() -> {
    collectedStats = new ArrayList<>();
    extensions.stream().forEach(e -> e.setStatsInfo(this));
    activeStats = new ActiveStats(extensions.stream().map(AbstractStatsExtension::snapshotAndPopulateStatsInfo).collect(Collectors.toList()));
    activeStats.setStatsInfo(this);
  }, true);
}
 

private void readObject(final ObjectInputStream in) throws IOException, ClassNotFoundException {
  // The process of deserializing makes use of this lock,
  // we'll get an NPE if we don't set this field here already.
  readWriteLock = new ReentrantReadWriteLock();
  in.defaultReadObject();
  gameDataEventListeners = new GameDataEventListeners();
}