| /* |
| * Copyright 2009-2010 by The Regents of the University of California |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * you may obtain a copy of the License from |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| package edu.uci.ics.hyracks.comm.channels; |
| |
| import java.net.SocketAddress; |
| import java.nio.ByteBuffer; |
| import java.util.ArrayDeque; |
| import java.util.Queue; |
| import java.util.logging.Level; |
| import java.util.logging.Logger; |
| |
| import edu.uci.ics.hyracks.api.channels.IInputChannel; |
| import edu.uci.ics.hyracks.api.channels.IInputChannelMonitor; |
| import edu.uci.ics.hyracks.api.context.IHyracksCommonContext; |
| import edu.uci.ics.hyracks.api.exceptions.HyracksDataException; |
| import edu.uci.ics.hyracks.api.partitions.PartitionId; |
| import edu.uci.ics.hyracks.net.buffers.IBufferAcceptor; |
| import edu.uci.ics.hyracks.net.buffers.ICloseableBufferAcceptor; |
| import edu.uci.ics.hyracks.net.protocols.muxdemux.ChannelControlBlock; |
| |
| public class NetworkInputChannel implements IInputChannel { |
| private static final Logger LOGGER = Logger.getLogger(NetworkInputChannel.class.getName()); |
| |
| static final int INITIAL_MESSAGE_SIZE = 20; |
| |
| private final IChannelConnectionFactory netManager; |
| |
| private final SocketAddress remoteAddress; |
| |
| private final PartitionId partitionId; |
| |
| private final Queue<ByteBuffer> fullQueue; |
| |
| private final int nBuffers; |
| |
| private ChannelControlBlock ccb; |
| |
| private IInputChannelMonitor monitor; |
| |
| private Object attachment; |
| |
| public NetworkInputChannel(IChannelConnectionFactory netManager, SocketAddress remoteAddress, |
| PartitionId partitionId, int nBuffers) { |
| this.netManager = netManager; |
| this.remoteAddress = remoteAddress; |
| this.partitionId = partitionId; |
| fullQueue = new ArrayDeque<ByteBuffer>(nBuffers); |
| this.nBuffers = nBuffers; |
| } |
| |
| @Override |
| public void registerMonitor(IInputChannelMonitor monitor) { |
| this.monitor = monitor; |
| } |
| |
| @Override |
| public void setAttachment(Object attachment) { |
| this.attachment = attachment; |
| } |
| |
| @Override |
| public Object getAttachment() { |
| return attachment; |
| } |
| |
| @Override |
| public synchronized ByteBuffer getNextBuffer() { |
| return fullQueue.poll(); |
| } |
| |
| @Override |
| public void recycleBuffer(ByteBuffer buffer) { |
| buffer.clear(); |
| ccb.getReadInterface().getEmptyBufferAcceptor().accept(buffer); |
| } |
| |
| @Override |
| public void open(IHyracksCommonContext ctx) throws HyracksDataException { |
| try { |
| ccb = netManager.connect(remoteAddress); |
| } catch (Exception e) { |
| throw new HyracksDataException(e); |
| } |
| ccb.getReadInterface().setFullBufferAcceptor(new ReadFullBufferAcceptor()); |
| ccb.getWriteInterface().setEmptyBufferAcceptor(new WriteEmptyBufferAcceptor()); |
| for (int i = 0; i < nBuffers; ++i) { |
| ccb.getReadInterface().getEmptyBufferAcceptor().accept(ctx.allocateFrame()); |
| } |
| ByteBuffer writeBuffer = ByteBuffer.allocate(INITIAL_MESSAGE_SIZE); |
| writeBuffer.putLong(partitionId.getJobId().getId()); |
| writeBuffer.putInt(partitionId.getConnectorDescriptorId().getId()); |
| writeBuffer.putInt(partitionId.getSenderIndex()); |
| writeBuffer.putInt(partitionId.getReceiverIndex()); |
| writeBuffer.flip(); |
| if (LOGGER.isLoggable(Level.FINE)) { |
| LOGGER.fine("Sending partition request: " + partitionId + " on channel: " + ccb); |
| } |
| ccb.getWriteInterface().getFullBufferAcceptor().accept(writeBuffer); |
| ccb.getWriteInterface().getFullBufferAcceptor().close(); |
| } |
| |
| @Override |
| public void close() throws HyracksDataException { |
| |
| } |
| |
| private class ReadFullBufferAcceptor implements ICloseableBufferAcceptor { |
| @Override |
| public void accept(ByteBuffer buffer) { |
| fullQueue.add(buffer); |
| monitor.notifyDataAvailability(NetworkInputChannel.this, 1); |
| } |
| |
| @Override |
| public void close() { |
| monitor.notifyEndOfStream(NetworkInputChannel.this); |
| } |
| |
| @Override |
| public void error(int ecode) { |
| monitor.notifyFailure(NetworkInputChannel.this); |
| } |
| } |
| |
| private class WriteEmptyBufferAcceptor implements IBufferAcceptor { |
| @Override |
| public void accept(ByteBuffer buffer) { |
| // do nothing |
| } |
| } |
| } |