Examples of org.apache.cassandra.concurrent.DebuggableThreadPoolExecutor

org.apache.cassandra.concurrent.DebuggableThreadPoolExecutor
This class encorporates some Executor best practices for Cassandra. Most of the executors in the system should use or extend this. There are two main improvements over a vanilla TPE: - If a task throws an exception, the default uncaught exception handler will be invoked; if there is no such handler, the exception will be logged. - MaximumPoolSize is not supported. Here is what that means (quoting TPE javadoc): If fewer than corePoolSize threads are running, the Executor always prefers adding a new thread rather than queuing. If corePoolSize or more threads are running, the Executor always prefers queuing a request rather than adding a new thread. If a request cannot be queued, a new thread is created unless this would exceed maximumPoolSize, in which case, the task will be rejected. We don't want this last stage of creating new threads if the queue is full; it makes it needlessly difficult to reason about the system's behavior. In other words, if DebuggableTPE has allocated our maximum number of (core) threads and the queue is full, we want the enqueuer to block. But to allow the number of threads to drop if a stage is less busy, core thread timeout is enabled.

    if(config.getString("Server") != null)
    {
      server_ = config.getString("Server");
      to_ = new EndPoint(config.getString("Server"), 7000);
    }
    runner_ = new DebuggableThreadPoolExecutor( numThreads,
        numThreads,
              Integer.MAX_VALUE,
              TimeUnit.SECONDS,
              new LinkedBlockingQueue<Runnable>(),
              new ThreadFactoryImpl("MEMTABLE-FLUSHER-POOL")

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    private MessagingService()
    {
        listenGate = new SimpleCondition();
        verbHandlers_ = new EnumMap<StorageService.Verb, IVerbHandler>(StorageService.Verb.class);
        streamExecutor_ = new DebuggableThreadPoolExecutor("Streaming", DatabaseDescriptor.getCompactionThreadPriority());
        Runnable logDropped = new Runnable()
        {
            public void run()
            {
                logDroppedMessages();

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     * @param to endpoint to which we need to stream the file.
    */


    public void stream(StreamHeader header, InetAddress to)
    {
        DebuggableThreadPoolExecutor executor = streamExecutors.get(to);
        if (executor == null)
        {
            // Using a core pool size of 0 is important. See documentation of streamExecutors.
            executor = new DebuggableThreadPoolExecutor(0,
                                                        1,
                                                        1,
                                                        TimeUnit.SECONDS,
                                                        new LinkedBlockingQueue<Runnable>(),
                                                        new NamedThreadFactory("Streaming to " + to));
            DebuggableThreadPoolExecutor old = streamExecutors.putIfAbsent(to, executor);
            if (old != null)
            {
                executor.shutdown();
                executor = old;
            }

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            lastDroppedInternal.put(verb, 0);
        }


        listenGate = new SimpleCondition();
        verbHandlers_ = new EnumMap<StorageService.Verb, IVerbHandler>(StorageService.Verb.class);
        streamExecutor_ = new DebuggableThreadPoolExecutor("Streaming", Thread.MIN_PRIORITY);
        Runnable logDropped = new Runnable()
        {
            public void run()
            {
                logDroppedMessages();

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     * @param to     endpoint to which we need to stream the file.
     */


    public void stream(StreamHeader header, InetAddress to)
    {
        DebuggableThreadPoolExecutor executor = streamExecutors.get(to);
        if (executor == null)
        {
            // Using a core pool size of 0 is important. See documentation of streamExecutors.
            executor = DebuggableThreadPoolExecutor.createWithMaximumPoolSize("Streaming to " + to, 1, 1, TimeUnit.SECONDS);
            DebuggableThreadPoolExecutor old = streamExecutors.putIfAbsent(to, executor);
            if (old != null)
            {
                executor.shutdown();
                executor = old;
            }

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     * @param to endpoint to which we need to stream the file.
    */


    public void stream(StreamHeader header, InetAddress to)
    {
        DebuggableThreadPoolExecutor executor = streamExecutors.get(to);
        if (executor == null)
        {
            // Using a core pool size of 0 is important. See documentation of streamExecutors.
            executor = DebuggableThreadPoolExecutor.createWithMaximumPoolSize("Streaming to " + to, 1, 1, TimeUnit.SECONDS);
            DebuggableThreadPoolExecutor old = streamExecutors.putIfAbsent(to, executor);
            if (old != null)
            {
                executor.shutdown();
                executor = old;
            }

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            lastDroppedInternal.put(verb, 0);
        }


        listenGate = new SimpleCondition();
        verbHandlers_ = new EnumMap<StorageService.Verb, IVerbHandler>(StorageService.Verb.class);
        streamExecutor_ = new DebuggableThreadPoolExecutor("Streaming", Thread.MIN_PRIORITY);
        Runnable logDropped = new Runnable()
        {
            public void run()
            {
                logDroppedMessages();

View Full Code Here

     * @param to endpoint to which we need to stream the file.
    */


    public void stream(StreamHeader header, InetAddress to)
    {
        DebuggableThreadPoolExecutor executor = streamExecutors.get(to);
        if (executor == null)
        {
            // Using a core pool size of 0 is important. See documentation of streamExecutors.
            executor = DebuggableThreadPoolExecutor.createWithMaximumPoolSize("Streaming to " + to, 1, 1, TimeUnit.SECONDS);
            DebuggableThreadPoolExecutor old = streamExecutors.putIfAbsent(to, executor);
            if (old != null)
            {
                executor.shutdown();
                executor = old;
            }

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     * @param to     endpoint to which we need to stream the file.
     */


    public void stream(StreamHeader header, InetAddress to)
    {
        DebuggableThreadPoolExecutor executor = streamExecutors.get(to);
        if (executor == null)
        {
            // Using a core pool size of 0 is important. See documentation of streamExecutors.
            executor = DebuggableThreadPoolExecutor.createWithMaximumPoolSize("Streaming to " + to, 1, 1, TimeUnit.SECONDS);
            DebuggableThreadPoolExecutor old = streamExecutors.putIfAbsent(to, executor);
            if (old != null)
            {
                executor.shutdown();
                executor = old;
            }

View Full Code Here


    private MessagingService()
    {
        listenGate = new SimpleCondition();
        verbHandlers_ = new EnumMap<StorageService.Verb, IVerbHandler>(StorageService.Verb.class);
        streamExecutor_ = new DebuggableThreadPoolExecutor("Streaming", DatabaseDescriptor.getCompactionThreadPriority());
        Runnable logDropped = new Runnable()
        {
            public void run()
            {
                logDroppedMessages();

View Full Code Here

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org.apache.cassandra.net.MessageDeserializationTask

org.apache.cassandra.net.MessageSerializationTask

org.apache.cassandra.net.MessagingService

org.apache.cassandra.service.StorageService

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