Package com.facebook.presto.jdbc.internal.netty.channel

Examples of com.facebook.presto.jdbc.internal.netty.channel.ReceiveBufferSizePredictor

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        }
        this.writeSpinCount = writeSpinCount;
    }

    public ReceiveBufferSizePredictor getReceiveBufferSizePredictor() {
        ReceiveBufferSizePredictor predictor = this.predictor;
        if (predictor == null) {
            try {
                this.predictor = predictor = getReceiveBufferSizePredictorFactory().getPredictor();
            } catch (Exception e) {
                throw new ChannelException(
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            throw new ChannelException(e);
        }
    }

    public ReceiveBufferSizePredictor getReceiveBufferSizePredictor() {
        ReceiveBufferSizePredictor predictor = this.predictor;
        if (predictor == null) {
            try {
                this.predictor = predictor = getReceiveBufferSizePredictorFactory().getPredictor();
            } catch (Exception e) {
                throw new ChannelException(
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    }

    @Override
    boolean process() throws IOException {

        ReceiveBufferSizePredictor predictor =
            channel.getConfig().getReceiveBufferSizePredictor();

        byte[] buf = new byte[predictor.nextReceiveBufferSize()];
        DatagramPacket packet = new DatagramPacket(buf, buf.length);
        try {
            channel.socket.receive(packet);
        } catch (InterruptedIOException e) {
            // Can happen on interruption.
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    @Override
    protected boolean read(SelectionKey k) {
        final SocketChannel ch = (SocketChannel) k.channel();
        final NioSocketChannel channel = (NioSocketChannel) k.attachment();

        final ReceiveBufferSizePredictor predictor =
            channel.getConfig().getReceiveBufferSizePredictor();
        final int predictedRecvBufSize = predictor.nextReceiveBufferSize();
        final ChannelBufferFactory bufferFactory = channel.getConfig().getBufferFactory();

        int ret = 0;
        int readBytes = 0;
        boolean failure = true;

        ByteBuffer bb = recvBufferPool.get(predictedRecvBufSize).order(bufferFactory.getDefaultOrder());
        try {
            while ((ret = ch.read(bb)) > 0) {
                readBytes += ret;
                if (!bb.hasRemaining()) {
                    break;
                }
            }
            failure = false;
        } catch (ClosedChannelException e) {
            // Can happen, and does not need a user attention.
        } catch (Throwable t) {
            fireExceptionCaught(channel, t);
        }

        if (readBytes > 0) {
            bb.flip();

            final ChannelBuffer buffer = bufferFactory.getBuffer(readBytes);
            buffer.setBytes(0, bb);
            buffer.writerIndex(readBytes);

            // Update the predictor.
            predictor.previousReceiveBufferSize(readBytes);

            // Fire the event.
            fireMessageReceived(channel, buffer);
        }
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    }

    @Override
    protected boolean read(final SelectionKey key) {
        final NioDatagramChannel channel = (NioDatagramChannel) key.attachment();
        ReceiveBufferSizePredictor predictor =
            channel.getConfig().getReceiveBufferSizePredictor();
        final ChannelBufferFactory bufferFactory = channel.getConfig().getBufferFactory();
        final DatagramChannel nioChannel = (DatagramChannel) key.channel();
        final int predictedRecvBufSize = predictor.nextReceiveBufferSize();

        final ByteBuffer byteBuffer = bufferAllocator.get(predictedRecvBufSize).order(bufferFactory.getDefaultOrder());

        boolean failure = true;
        SocketAddress remoteAddress = null;
        try {
            // Receive from the channel in a non blocking mode. We have already been notified that
            // the channel is ready to receive.
            remoteAddress = nioChannel.receive(byteBuffer);
            failure = false;
        } catch (ClosedChannelException e) {
            // Can happen, and does not need a user attention.
        } catch (Throwable t) {
            fireExceptionCaught(channel, t);
        }

        if (remoteAddress != null) {
            // Flip the buffer so that we can wrap it.
            byteBuffer.flip();

            int readBytes = byteBuffer.remaining();
            if (readBytes > 0) {
                // Update the predictor.
                predictor.previousReceiveBufferSize(readBytes);

                final ChannelBuffer buffer = bufferFactory.getBuffer(readBytes);
                buffer.setBytes(0, byteBuffer);
                buffer.writerIndex(readBytes);

                // Update the predictor.
                predictor.previousReceiveBufferSize(readBytes);

                // Notify the interested parties about the newly arrived message.
                fireMessageReceived(
                        channel, buffer, remoteAddress);
            }
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Related Classes of com.facebook.presto.jdbc.internal.netty.channel.ReceiveBufferSizePredictor

  • com.facebook.presto.jdbc.internal.netty.channel.socket.DefaultDatagramChannelConfig
  • com.facebook.presto.jdbc.internal.netty.channel.socket.nio.DefaultNioSocketChannelConfig
  • com.facebook.presto.jdbc.internal.netty.channel.socket.nio.NioDatagramWorker
  • com.facebook.presto.jdbc.internal.netty.channel.socket.nio.NioWorker
  • com.facebook.presto.jdbc.internal.netty.channel.socket.oio.OioDatagramWorker
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