com.lmax.disruptor.dsl.ProducerType Java Examples

@SuppressWarnings("unchecked")
@Override
public void start() {
	if (appenderCount == 0) {
		addError("No attached appenders found.");
		return;
	}
	if (queueSize < 1) {
		addError("Invalid queue size [" + queueSize + "]");
		return;
	}
	addInfo("环形缓冲区的大小： " + queueSize);
	Executor executor = Executors.newCachedThreadPool();
	Disruptor<LogValueEvent> disruptor = new Disruptor<LogValueEvent>(
			LogValueEvent.EVENT_FACTORY, queueSize, executor,
			ProducerType.MULTI, new SleepingWaitStrategy());
	disruptor.handleEventsWith(new LogDisruptorEventHandle());
	disruptor.start();
	ringBuffer = disruptor.getRingBuffer();
	super.start();
}
 

public Disruptor<DisruptorData> createDisruptor(String name, int ringBufferSize, ThreadFactory factory) {
        if (DISRUPTOR_MAP.keySet().contains(name)) {
            throw new RuntimeException("create disruptor faild,the name is repetitive!");
        }

        Disruptor<DisruptorData> disruptor = new Disruptor<DisruptorData>(EVENT_FACTORY,
                ringBufferSize, factory, ProducerType.MULTI,
                new BlockingWaitStrategy());
        disruptor.setDefaultExceptionHandler(new NulsExceptionHandler());
        //SleepingWaitStrategy
//        disruptor.handleEventsWith(new EventHandler<DisruptorData>() {
//            @Override
//            public void onEvent(DisruptorData DisruptorData, long l, boolean b) throws Exception {
//                Log.debug(DisruptorData.getData() + "");
//            }
//        });
        DISRUPTOR_MAP.put(name, disruptor);

        return disruptor;
    }
 

DisruptorEventQueue(
    int bufferSize, WaitStrategy waitStrategy, SpanProcessor spanProcessor, boolean blocking) {
  // Create new Disruptor for processing. Note that Disruptor creates a single thread per
  // consumer (see https://github.com/LMAX-Exchange/disruptor/issues/121 for details);
  // this ensures that the event handler can take unsynchronized actions whenever possible.
  Disruptor<DisruptorEvent> disruptor =
      new Disruptor<>(
          EVENT_FACTORY,
          bufferSize,
          new DaemonThreadFactory(WORKER_THREAD_NAME),
          ProducerType.MULTI,
          waitStrategy);
  disruptor.handleEventsWith(new DisruptorEventHandler(spanProcessor));
  this.ringBuffer = disruptor.start();
  this.blocking = blocking;
}
 

private void initDispatcherFactoryFromConfiguration(String name) {
  if (dispatcherFactories.get(name) != null) {
    return;
  }
  for (DispatcherConfiguration dispatcherConfiguration : configuration.getDispatcherConfigurations()) {

    if (!dispatcherConfiguration.getName()
      .equalsIgnoreCase(name)) {
      continue;
    }

    if (DispatcherType.DISPATCHER_GROUP == dispatcherConfiguration.getType()) {
      addCachedDispatchers(dispatcherConfiguration.getName(),
        createDispatcherFactory(dispatcherConfiguration.getName(),
          dispatcherConfiguration.getSize() == 0 ? PROCESSORS : dispatcherConfiguration.getSize(),
          dispatcherConfiguration.getBacklog(),
          null,
          ProducerType.MULTI,
          new AgileWaitingStrategy()));
    }
  }
}
 

@Override
public void afterPropertiesSet() throws Exception {
	if ("BusySpinWaitStrategy".equals(waitStrategy)) {
		disruptor = new Disruptor<FastEvent>(new FastEventFactory(), 65536, DaemonThreadFactory.INSTANCE,
				ProducerType.MULTI, new BusySpinWaitStrategy());
	} else if ("SleepingWaitStrategy".equals(waitStrategy)) {
		disruptor = new Disruptor<FastEvent>(new FastEventFactory(), 65536, DaemonThreadFactory.INSTANCE,
				ProducerType.MULTI, new SleepingWaitStrategy());
	} else if ("BlockingWaitStrategy".equals(waitStrategy)) {
		disruptor = new Disruptor<FastEvent>(new FastEventFactory(), 65536, DaemonThreadFactory.INSTANCE,
				ProducerType.MULTI, new BlockingWaitStrategy());
	} else {
		disruptor = new Disruptor<FastEvent>(new FastEventFactory(), 65536, DaemonThreadFactory.INSTANCE,
				ProducerType.MULTI, new YieldingWaitStrategy());
	}
	ringBuffer = disruptor.start();
}
 

/**
 * disruptor start.
 *
 * @param bufferSize this is disruptor buffer size.
 * @param threads this is disruptor consumer thread size.
 */
private void start(final int bufferSize, final int threads) {
    disruptor = new Disruptor<>(new TxTransactionEventFactory(), bufferSize, r -> {
        return new Thread(null, r, "disruptor-thread-" + INDEX.getAndIncrement());
    }, ProducerType.MULTI, new BlockingWaitStrategy());

    final Executor executor = new ThreadPoolExecutor(threads, threads, 0, TimeUnit.MILLISECONDS,
            new LinkedBlockingQueue<>(),
            TxTransactionThreadFactory.create("raincat-log-disruptor", false),
            new ThreadPoolExecutor.AbortPolicy());

    TxTransactionEventHandler[] consumers = new TxTransactionEventHandler[threads];
    for (int i = 0; i < threads; i++) {
        consumers[i] = new TxTransactionEventHandler(executor, txCompensationService);
    }
    disruptor.handleEventsWithWorkerPool(consumers);
    disruptor.setDefaultExceptionHandler(new IgnoreExceptionHandler());
    disruptor.start();
}
 

/**
 * start disruptor.
 */
@SuppressWarnings("unchecked")
public void startup() {
    Disruptor<DataEvent<T>> disruptor = new Disruptor<>(new DisruptorEventFactory<>(),
            size,
            HmilyThreadFactory.create("disruptor_consumer_" + consumerFactory.fixName(), false),
            ProducerType.MULTI,
            new BlockingWaitStrategy());
    DisruptorConsumer<T>[] consumers = new DisruptorConsumer[consumerSize];
    for (int i = 0; i < consumerSize; i++) {
        consumers[i] = new DisruptorConsumer<>(consumerFactory);
    }
    disruptor.handleEventsWithWorkerPool(consumers);
    disruptor.setDefaultExceptionHandler(new IgnoreExceptionHandler());
    disruptor.start();
    RingBuffer<DataEvent<T>> ringBuffer = disruptor.getRingBuffer();
    provider = new DisruptorProvider<>(ringBuffer);
}
 

/**
 * start disruptor.
 *
 * @param bufferSize bufferSize
 */
private void start(final int bufferSize, final int threadSize) {
    disruptor = new Disruptor<>(new MythTransactionEventFactory(), bufferSize, runnable -> {
        return new Thread(new ThreadGroup("hmily-disruptor"), runnable,
                "disruptor-thread-" + INDEX.getAndIncrement());
    }, ProducerType.MULTI, new BlockingWaitStrategy());
    final Executor executor = new ThreadPoolExecutor(MAX_THREAD, MAX_THREAD, 0, TimeUnit.MILLISECONDS,
            new LinkedBlockingQueue<>(),
            MythTransactionThreadFactory.create("myth-log-disruptor", false),
            new ThreadPoolExecutor.AbortPolicy());

    MythTransactionEventHandler[] consumers = new MythTransactionEventHandler[MAX_THREAD];
    for (int i = 0; i < threadSize; i++) {
        consumers[i] = new MythTransactionEventHandler(coordinatorService, executor);
    }
    disruptor.handleEventsWithWorkerPool(consumers);
    disruptor.setDefaultExceptionHandler(new IgnoreExceptionHandler());
    disruptor.start();
}
 

@SuppressWarnings("unchecked")
DbMessageStore(MessageDao messageDao, int bufferSize, int maxDbBatchSize) {
    ThreadFactory namedThreadFactory = new ThreadFactoryBuilder()
            .setNameFormat("DisruptorMessageStoreThread-%d").build();

    disruptor = new Disruptor<>(DbOperation.getFactory(),
                                bufferSize, namedThreadFactory, ProducerType.MULTI, new
                                        SleepingBlockingWaitStrategy());

    disruptor.setDefaultExceptionHandler(new DbStoreExceptionHandler());

    disruptor.handleEventsWith(new DbEventMatcher(bufferSize))
             .then(new DbAccessHandler(messageDao, maxDbBatchSize))
             .then(new FinalEventHandler());
    disruptor.start();
    this.messageDao = messageDao;
}
 

private RingBufferProcessor(String name,
                            ExecutorService executor,
                            int bufferSize,
                            WaitStrategy waitStrategy,
                            boolean shared,
                            boolean autoCancel) {
  super(name, executor, autoCancel);

  this.ringBuffer = RingBuffer.create(
    shared ? ProducerType.MULTI : ProducerType.SINGLE,
    new EventFactory<MutableSignal<E>>() {
      @Override
      public MutableSignal<E> newInstance() {
        return new MutableSignal<E>();
      }
    },
    bufferSize,
    waitStrategy
  );

  this.recentSequence = new Sequence(Sequencer.INITIAL_CURSOR_VALUE);
  this.barrier = ringBuffer.newBarrier();
  //ringBuffer.addGatingSequences(recentSequence);
}
 

private RingBufferWorkProcessor(String name,
                                ExecutorService executor,
                                int bufferSize,
                                WaitStrategy waitStrategy,
                                boolean share,
                                boolean autoCancel) {
  super(name, executor, autoCancel);

  this.ringBuffer = RingBuffer.create(
    share ? ProducerType.MULTI : ProducerType.SINGLE,
    new EventFactory<MutableSignal<E>>() {
      @Override
      public MutableSignal<E> newInstance() {
        return new MutableSignal<E>();
      }
    },
    bufferSize,
    waitStrategy
  );

  ringBuffer.addGatingSequences(workSequence);

}
 

@SuppressWarnings("unchecked")
@Override
public void start() {
	if (appenderCount == 0) {
		addError("No attached appenders found.");
		return;
	}
	if (queueSize < 1) {
		addError("Invalid queue size [" + queueSize + "]");
		return;
	}
	addInfo("环形缓冲区的大小： " + queueSize);
	Executor executor = Executors.newCachedThreadPool();
	Disruptor<LogValueEvent> disruptor = new Disruptor<LogValueEvent>(
			LogValueEvent.EVENT_FACTORY, queueSize, executor,
			ProducerType.MULTI, new SleepingWaitStrategy());
	disruptor.handleEventsWith(new LogDisruptorEventHandle());
	disruptor.start();
	ringBuffer = disruptor.getRingBuffer();
	super.start();
}
 

public AsyncReadResolver(int maxThreads,int bufferSize,
                         TxnSupplier txnSupplier,
                         RollForwardStatus status,
                         TrafficControl trafficControl,
                         KeyedReadResolver synchronousResolver){
    this.txnSupplier=txnSupplier;
    this.trafficControl=trafficControl;
    this.status=status;
    this.synchronousResolver = synchronousResolver;
    consumerThreads=new ThreadPoolExecutor(maxThreads,maxThreads,
            60,TimeUnit.SECONDS,
            new LinkedBlockingQueue<Runnable>(),
            new ThreadFactoryBuilder().setNameFormat("readResolver-%d").setDaemon(true).build());

    int bSize=1;
    while(bSize<bufferSize)
        bSize<<=1;
    disruptor=new Disruptor<>(new ResolveEventFactory(),bSize,consumerThreads,
            ProducerType.MULTI,
            new BlockingWaitStrategy()); //we want low latency here, but it might cost too much in CPU
    disruptor.handleEventsWith(new ResolveEventHandler());
    ringBuffer=disruptor.getRingBuffer();
}
 

public TransactionResolver(TxnSupplier txnSupplier, int numThreads, int bufferSize) {
     this.txnSupplier = txnSupplier;
     this.consumerThreads = MoreExecutors.namedThreadPool(numThreads, numThreads, "txn-resolve-%d", 60, true);
     this.consumerThreads.allowCoreThreadTimeOut(true);

     int bSize=1;
     while(bSize<bufferSize)
         bSize<<=1;

     disruptor = new Disruptor<>(new EventFactory<TxnResolveEvent>() {
@Override
public TxnResolveEvent newInstance() {
              return new TxnResolveEvent();
}
     },bSize,consumerThreads,
             ProducerType.MULTI,
             new BlockingWaitStrategy());
     disruptor.handleEventsWith(new ResolveEventHandler());
     ringBuffer = disruptor.getRingBuffer();
     disruptor.start();
 }
 

@Test
public void testSingleProducer() throws InterruptedException {
    System.out.println("!!!!!!!!!!!!!!Begin testSingleProducer!!!!!!!!!!!!!!");
    final AtomicBoolean messageConsumed = new AtomicBoolean(false);

    // Set queue length to 1, so that the RingBuffer can be easily full
    // to trigger consumer blocking
    DisruptorQueue queue = createQueue("consumerHang", ProducerType.SINGLE, 1);
    push(queue, 1);
    Runnable producer = new Producer(queue);
    Runnable consumer = new Consumer(queue, new EventHandler<Object>() {
        long count = 0;

        @Override
        public void onEvent(Object obj, long sequence, boolean endOfBatch) throws Exception {

            messageConsumed.set(true);
            System.out.println("Consume " + count++);
        }
    });

    run(producer, 0, 0, consumer, 50);
    Assert.assertTrue("disruptor message is never consumed due to consumer thread hangs", messageConsumed.get());

    System.out.println("!!!!!!!!!!!!!!End testSingleProducer!!!!!!!!!!!!!!");
}
 

@Test
public void whenMultipleProducerMultipleConsumer_thenOutputInFifoOrder() {
    final EventConsumer eventConsumer = new MultiEventPrintConsumer();
    final EventProducer eventProducer = new DelayedMultiEventProducer();
    createDisruptor(ProducerType.MULTI, eventConsumer);
    final RingBuffer<ValueEvent> ringBuffer = disruptor.start();

    startProducing(ringBuffer, 32, eventProducer);

    disruptor.halt();
    disruptor.shutdown();
}
 

@Test
public void whenSingleProducerMultipleConsumer_thenOutputInFifoOrder() {
    final EventConsumer eventConsumer = new MultiEventConsumer();
    final EventProducer eventProducer = new SingleEventProducer();
    createDisruptor(ProducerType.SINGLE, eventConsumer);
    final RingBuffer<ValueEvent> ringBuffer = disruptor.start();

    startProducing(ringBuffer, 32, eventProducer);

    disruptor.halt();
    disruptor.shutdown();
}
 

@Override
public boolean init(final ReadOnlyServiceOptions opts) {
    this.node = opts.getNode();
    this.nodeMetrics = this.node.getNodeMetrics();
    this.fsmCaller = opts.getFsmCaller();
    this.raftOptions = opts.getRaftOptions();

    this.scheduledExecutorService = Executors
        .newSingleThreadScheduledExecutor(new NamedThreadFactory("ReadOnlyService-PendingNotify-Scanner", true));
    this.readIndexDisruptor = DisruptorBuilder.<ReadIndexEvent> newInstance() //
        .setEventFactory(new ReadIndexEventFactory()) //
        .setRingBufferSize(this.raftOptions.getDisruptorBufferSize()) //
        .setThreadFactory(new NamedThreadFactory("JRaft-ReadOnlyService-Disruptor-", true)) //
        .setWaitStrategy(new BlockingWaitStrategy()) //
        .setProducerType(ProducerType.MULTI) //
        .build();
    this.readIndexDisruptor.handleEventsWith(new ReadIndexEventHandler());
    this.readIndexDisruptor
        .setDefaultExceptionHandler(new LogExceptionHandler<Object>(getClass().getSimpleName()));
    this.readIndexQueue = this.readIndexDisruptor.start();
    if (this.nodeMetrics.getMetricRegistry() != null) {
        this.nodeMetrics.getMetricRegistry() //
            .register("jraft-read-only-service-disruptor", new DisruptorMetricSet(this.readIndexQueue));
    }
    // listen on lastAppliedLogIndex change events.
    this.fsmCaller.addLastAppliedLogIndexListener(this);

    // start scanner
    this.scheduledExecutorService.scheduleAtFixedRate(() -> onApplied(this.fsmCaller.getLastAppliedIndex()),
        this.raftOptions.getMaxElectionDelayMs(), this.raftOptions.getMaxElectionDelayMs(), TimeUnit.MILLISECONDS);
    return true;
}
 

@Override
        protected Disruptor<ConcurrentEvent> initialValue() {
            Disruptor<ConcurrentEvent> disruptor = new Disruptor<>(
                    ConcurrentEventFactory.DEFAULT, DEFAULT_RING_BUFFER_SIZE, CACHED_THREAD_POOL, ProducerType.SINGLE, new LiteBlockingWaitStrategy());
            disruptor.handleEventsWith(new ConcurrentHandler());
//            disruptor.handleExceptionsWith();
            disruptor.start();
            return disruptor;
        }
 

@Override
        protected Disruptor<ConcurrentEvent> initialValue() {
            Disruptor<ConcurrentEvent> disruptor = new Disruptor<>(
                    ConcurrentEventFactory.DEFAULT, DEFAULT_RING_BUFFER_SIZE, CACHED_THREAD_POOL, ProducerType.SINGLE, new LiteBlockingWaitStrategy());
            disruptor.handleEventsWith(new ConcurrentHandler());
//            disruptor.handleExceptionsWith();
            disruptor.start();
            return disruptor;
        }
 

@Override
        protected Disruptor<ConcurrentEvent> initialValue() {
            Disruptor<ConcurrentEvent> disruptor = new Disruptor<>(
                    ConcurrentEventFactory.DEFAULT, DEFAULT_RING_BUFFER_SIZE, CACHED_THREAD_POOL, ProducerType.SINGLE, new BlockingWaitStrategy());
            disruptor.handleEventsWith(new ConcurrentHandler());
//            disruptor.handleExceptionsWith();
            disruptor.start();
            return disruptor;
        }
 

public LogicProcessor(EventFactory<ConcurrentEvent> factory, EventHandler<ConcurrentEvent> handler, int rbSize, ExecutorService es, ProducerType pt, WaitStrategy ws) {
    this.disruptor = new Disruptor<>(factory, rbSize, es, pt, ws);
    this.disruptor.handleEventsWith(handler);
    //  disruptor.handleExceptionsWith();
    this.disruptor.start();
    this.msgQueue = newQueue();
}
 

@SuppressWarnings({ "unchecked", "deprecation" })
@Bean(name="multiupdate")   
   public Disruptor<UserDataEvent> multiupdate() {   
   	Executor executor = Executors.newCachedThreadPool();
   	 MultiUpdateEventFactory factory = new MultiUpdateEventFactory();
   	 Disruptor<UserDataEvent> disruptor = new Disruptor<UserDataEvent>(factory, 1024, executor, ProducerType.MULTI , new BlockingWaitStrategy());
   	 disruptor.handleEventsWith(new MultiUpdateEventHandler());
   	 disruptor.setDefaultExceptionHandler(new UKeFuExceptionHandler());
   	 disruptor.start();
        return disruptor;   
   }
 

@Setup
public synchronized void setup() throws InterruptedException
{
    for (int i = 0; i < MAX_THREAD_COUNT; i++)
    {
        responseQueues[i] = new OneToOneConcurrentArrayQueue<>(RESPONSE_QUEUE_CAPACITY);
    }

    values = new int[burstLength];
    for (int i = 0; i < burstLength; i++)
    {
        values[i] = -(burstLength - i);
    }

    handler = new Handler(responseQueues);

    disruptor = new Disruptor<>(
        Message::new,
        Configuration.SEND_QUEUE_CAPACITY,
        (ThreadFactory)Thread::new,
        ProducerType.MULTI,
        new BusySpinWaitStrategy());

    disruptor.handleEventsWith(handler);
    disruptor.start();

    handler.waitForStart();
}
 

/**
 * Increases the reference count and creates and starts a new Disruptor and associated thread if none currently
 * exists.
 *
 * @see #stop()
 */
@Override
public synchronized void start() {
    if (disruptor != null) {
        LOGGER.trace("AsyncLoggerConfigDisruptor not starting new disruptor for this configuration, "
                + "using existing object.");
        return;
    }
    LOGGER.trace("AsyncLoggerConfigDisruptor creating new disruptor for this configuration.");
    ringBufferSize = DisruptorUtil.calculateRingBufferSize("AsyncLoggerConfig.RingBufferSize");
    final WaitStrategy waitStrategy = DisruptorUtil.createWaitStrategy("AsyncLoggerConfig.WaitStrategy");

    final ThreadFactory threadFactory = new Log4jThreadFactory("AsyncLoggerConfig", true, Thread.NORM_PRIORITY) {
        @Override
        public Thread newThread(final Runnable r) {
            final Thread result = super.newThread(r);
            backgroundThreadId = result.getId();
            return result;
        }
    };
    asyncQueueFullPolicy = AsyncQueueFullPolicyFactory.create();

    translator = mutable ? MUTABLE_TRANSLATOR : TRANSLATOR;
    factory = mutable ? MUTABLE_FACTORY : FACTORY;
    disruptor = new Disruptor<>(factory, ringBufferSize, threadFactory, ProducerType.MULTI, waitStrategy);

    final ExceptionHandler<Log4jEventWrapper> errorHandler = DisruptorUtil.getAsyncLoggerConfigExceptionHandler();
    disruptor.setDefaultExceptionHandler(errorHandler);

    final Log4jEventWrapperHandler[] handlers = {new Log4jEventWrapperHandler()};
    disruptor.handleEventsWith(handlers);

    LOGGER.debug("Starting AsyncLoggerConfig disruptor for this configuration with ringbufferSize={}, "
            + "waitStrategy={}, exceptionHandler={}...", disruptor.getRingBuffer().getBufferSize(), waitStrategy
            .getClass().getSimpleName(), errorHandler);
    disruptor.start();
    super.start();
}
 

@SuppressWarnings("unchecked")
public WorkQueueDispatcher(String name,
                           int poolSize,
                           int backlog,
                           final Consumer<Throwable> uncaughtExceptionHandler) {
  this(name, poolSize, backlog, uncaughtExceptionHandler, ProducerType.MULTI, new BlockingWaitStrategy());
}
 

/**
 * 
 * @param type  ����������  �������� ��������
 * @param bufferSize  ringbuffer������
 * @param waitStrategy   �ȴ�����
 * @param messageConsumers  ������
 */
@SuppressWarnings("unchecked")
public void initAndStart(ProducerType type, int bufferSize, WaitStrategy waitStrategy, MessageConsumer[] messageConsumers) {
	if(!startFlag){
	//1. ����ringBuffer����
	this.ringBuffer = RingBuffer.create(type,
			new EventFactory<MessageWrapper>() {
				public MessageWrapper newInstance() {
					return new MessageWrapper();
				}
			},
			bufferSize,
			waitStrategy);
	//2.�������դ��
	this.sequenceBarrier = this.ringBuffer.newBarrier();
	//3.���ù�����
	this.workerPool = new WorkerPool(this.ringBuffer,
			this.sequenceBarrier, 
			new EventExceptionHandler(), messageConsumers);
	//4 �����������������������
	for(MessageConsumer mc : messageConsumers){
		this.consumers.put(mc.getConsumerId(), mc);
	}
	//5 ������ǵ�sequences
	this.ringBuffer.addGatingSequences(this.workerPool.getWorkerSequences());
	//6 �������ǵĹ�����
	this.workerPool.start(Executors.newFixedThreadPool(Runtime.getRuntime().availableProcessors()/2));
	//7.����������־����ֹ�ظ�����
	startFlag=true;
	}
}
 

@Bean
public RingBuffer<MatchOrder> ringBuffer() {
	EventFactory<MatchOrder> factory = new OrderFactory();
	int ringBufferSize = 1024 * 1024;
	ThreadFactory disruptorThreadPool = new ThreadFactoryBuilder().setNameFormat("DisruptorThreadPool").build();
	Disruptor<MatchOrder> disruptor = new Disruptor<MatchOrder>(factory, ringBufferSize, disruptorThreadPool,
			ProducerType.MULTI, new YieldingWaitStrategy());
	disruptor.setDefaultExceptionHandler(new MyHandlerException());// Disruptor异常统计
	// 单线处理撮合, 并行处理盘口和订单薄
	disruptor.handleEventsWithWorkerPool(new MatchHandler(),new MatchHandler()).then(new InputDepthHandler(),new OutDepthHandler());
	disruptor.start();
	return disruptor.getRingBuffer();
}
 

public RoundRobinSupplier(int poolsize,
                          String name,
                          int bufferSize,
                          Consumer<Throwable> errorHandler,
                          ProducerType producerType,
                          WaitStrategy waitStrategy) {
  this.poolsize = poolsize;
  this.name = name;
  this.bufferSize = bufferSize;
  this.errorHandler = errorHandler;
  this.producerType = producerType;
  this.waitStrategy = waitStrategy;
  dispatchers = new Dispatcher[poolsize];
  terminated = false;
}
 

/**
 * Create an edit log at the given <code>dir</code> location. You should never have to load an
 * existing log. If there is a log at startup, it should have already been processed and deleted
 * by the time the WAL object is started up.
 * @param fs filesystem handle
 * @param rootDir path to where logs and oldlogs
 * @param logDir dir where wals are stored
 * @param archiveDir dir where wals are archived
 * @param conf configuration to use
 * @param listeners Listeners on WAL events. Listeners passed here will be registered before we do
 *          anything else; e.g. the Constructor {@link #rollWriter()}.
 * @param failIfWALExists If true IOException will be thrown if files related to this wal already
 *          exist.
 * @param prefix should always be hostname and port in distributed env and it will be URL encoded
 *          before being used. If prefix is null, "wal" will be used
 * @param suffix will be url encoded. null is treated as empty. non-empty must start with
 *          {@link org.apache.hadoop.hbase.wal.AbstractFSWALProvider#WAL_FILE_NAME_DELIMITER}
 */
public FSHLog(final FileSystem fs, final Path rootDir, final String logDir,
    final String archiveDir, final Configuration conf, final List<WALActionsListener> listeners,
    final boolean failIfWALExists, final String prefix, final String suffix) throws IOException {
  super(fs, rootDir, logDir, archiveDir, conf, listeners, failIfWALExists, prefix, suffix);
  this.minTolerableReplication = conf.getInt("hbase.regionserver.hlog.tolerable.lowreplication",
    CommonFSUtils.getDefaultReplication(fs, this.walDir));
  this.lowReplicationRollLimit = conf.getInt("hbase.regionserver.hlog.lowreplication.rolllimit",
    5);
  this.closeErrorsTolerated = conf.getInt("hbase.regionserver.logroll.errors.tolerated", 2);

  // This is the 'writer' -- a single threaded executor. This single thread 'consumes' what is
  // put on the ring buffer.
  String hostingThreadName = Thread.currentThread().getName();
  // Using BlockingWaitStrategy. Stuff that is going on here takes so long it makes no sense
  // spinning as other strategies do.
  this.disruptor = new Disruptor<>(RingBufferTruck::new,
      getPreallocatedEventCount(),
      Threads.newDaemonThreadFactory(hostingThreadName + ".append"),
      ProducerType.MULTI, new BlockingWaitStrategy());
  // Advance the ring buffer sequence so that it starts from 1 instead of 0,
  // because SyncFuture.NOT_DONE = 0.
  this.disruptor.getRingBuffer().next();
  int maxHandlersCount = conf.getInt(HConstants.REGION_SERVER_HANDLER_COUNT, 200);
  this.ringBufferEventHandler = new RingBufferEventHandler(
      conf.getInt("hbase.regionserver.hlog.syncer.count", 5), maxHandlersCount);
  this.disruptor.setDefaultExceptionHandler(new RingBufferExceptionHandler());
  this.disruptor.handleEventsWith(new RingBufferEventHandler[] { this.ringBufferEventHandler });
  // Starting up threads in constructor is a no no; Interface should have an init call.
  this.disruptor.start();
}