| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you 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 at |
| * |
| * 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 org.apache.cassandra.streaming.async; |
| |
| import java.io.IOException; |
| import java.net.InetSocketAddress; |
| import java.nio.ByteBuffer; |
| import java.util.Collection; |
| import java.util.Collections; |
| import java.util.concurrent.ConcurrentHashMap; |
| import java.util.function.IntFunction; |
| |
| import com.google.common.annotations.VisibleForTesting; |
| |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| import io.netty.buffer.ByteBuf; |
| import io.netty.channel.Channel; |
| import io.netty.channel.ChannelHandlerContext; |
| import io.netty.channel.ChannelInboundHandlerAdapter; |
| import io.netty.util.AttributeKey; |
| import io.netty.util.ReferenceCountUtil; |
| import org.apache.cassandra.net.AsyncChannelPromise; |
| import org.apache.cassandra.net.AsyncStreamingInputPlus; |
| import org.apache.cassandra.net.AsyncStreamingOutputPlus; |
| import org.apache.cassandra.net.GlobalBufferPoolAllocator; |
| import org.apache.cassandra.streaming.StreamingChannel; |
| import org.apache.cassandra.streaming.StreamingDataInputPlus; |
| import org.apache.cassandra.streaming.StreamingDataOutputPlus; |
| import org.apache.cassandra.streaming.StreamingDataOutputPlusFixed; |
| import org.apache.cassandra.utils.concurrent.Future; |
| import org.apache.cassandra.utils.concurrent.ImmediateFuture; |
| |
| import static io.netty.util.AttributeKey.valueOf; |
| import static java.lang.Boolean.FALSE; |
| |
| public class NettyStreamingChannel extends ChannelInboundHandlerAdapter implements StreamingChannel |
| { |
| private static final Logger logger = LoggerFactory.getLogger(NettyStreamingChannel.class); |
| private static volatile boolean trackInboundHandlers = false; |
| private static Collection<NettyStreamingChannel> inboundHandlers; |
| |
| @VisibleForTesting |
| static final AttributeKey<Boolean> TRANSFERRING_FILE_ATTR = valueOf("transferringFile"); |
| final int messagingVersion; |
| final Channel channel; |
| |
| /** |
| * A collection of {@link ByteBuf}s that are yet to be processed. Incoming buffers are first dropped into this |
| * structure, and then consumed. |
| * <p> |
| * For thread safety, this structure's resources are released on the consuming thread |
| * (via {@link AsyncStreamingInputPlus#close()}, |
| * but the producing side calls {@link AsyncStreamingInputPlus#requestClosure()} to notify the input that it should close. |
| */ |
| @VisibleForTesting |
| final AsyncStreamingInputPlus in; |
| |
| private volatile boolean closed; |
| |
| public NettyStreamingChannel(int messagingVersion, Channel channel, Kind kind) |
| { |
| this.messagingVersion = messagingVersion; |
| this.channel = channel; |
| channel.attr(TRANSFERRING_FILE_ATTR).set(FALSE); |
| if (kind == Kind.CONTROL) |
| { |
| if (trackInboundHandlers) |
| inboundHandlers.add(this); |
| in = new AsyncStreamingInputPlus(channel); |
| } |
| else in = null; |
| } |
| |
| @Override |
| public Object id() |
| { |
| return channel.id(); |
| } |
| |
| @Override |
| public String description() |
| { |
| return "channel.remote " + channel.remoteAddress() + |
| " channel.local " + channel.localAddress() + |
| " channel.id " + channel.id(); |
| } |
| |
| @Override |
| public InetSocketAddress peer() |
| { |
| return (InetSocketAddress) channel.remoteAddress(); |
| } |
| |
| @Override |
| public InetSocketAddress connectedTo() |
| { |
| return peer(); |
| } |
| |
| @Override |
| public boolean connected() |
| { |
| return channel.isOpen(); |
| } |
| |
| public StreamingDataInputPlus in() |
| { |
| return in; |
| } |
| |
| public StreamingDataOutputPlus acquireOut() |
| { |
| if (!channel.attr(TRANSFERRING_FILE_ATTR).compareAndSet(false, true)) |
| throw new IllegalStateException("channel's transferring state is currently set to true. refusing to start new stream"); |
| |
| return new AsyncStreamingOutputPlus(channel) |
| { |
| @Override |
| public void close() throws IOException |
| { |
| try |
| { |
| super.close(); |
| } |
| finally |
| { |
| NettyStreamingChannel.this.channel.attr(TRANSFERRING_FILE_ATTR).set(FALSE); |
| } |
| } |
| }; |
| } |
| |
| public Future<?> send(Send send) |
| { |
| class Factory implements IntFunction<StreamingDataOutputPlus> |
| { |
| ByteBuf buf; |
| ByteBuffer buffer; |
| |
| @Override |
| public StreamingDataOutputPlus apply(int size) |
| { |
| buf = GlobalBufferPoolAllocator.instance.buffer(size); |
| buffer = buf.nioBuffer(buf.writerIndex(), size); |
| return new StreamingDataOutputPlusFixed(buffer); |
| } |
| } |
| |
| Factory factory = new Factory(); |
| try |
| { |
| send.send(factory); |
| ByteBuf buf = factory.buf; |
| ByteBuffer buffer = factory.buffer; |
| try |
| { |
| assert buffer.position() == buffer.limit(); |
| buf.writerIndex(buffer.position()); |
| AsyncChannelPromise promise = new AsyncChannelPromise(channel); |
| channel.writeAndFlush(buf, promise); |
| return promise; |
| } |
| catch (Throwable t) |
| { |
| buf.release(); |
| throw t; |
| } |
| } |
| catch (Throwable t) |
| { |
| return ImmediateFuture.failure(t); |
| } |
| } |
| |
| @Override |
| public synchronized io.netty.util.concurrent.Future<?> close() |
| { |
| if (closed) |
| return channel.closeFuture(); |
| |
| closed = true; |
| if (in != null) |
| { |
| in.requestClosure(); |
| if (trackInboundHandlers) |
| inboundHandlers.remove(this); |
| } |
| |
| return channel.close(); |
| } |
| |
| @Override |
| public void onClose(Runnable runOnClose) |
| { |
| channel.closeFuture().addListener(ignore -> runOnClose.run()); |
| } |
| |
| @Override |
| public void channelRead(ChannelHandlerContext ctx, Object message) |
| { |
| if (closed || !(message instanceof ByteBuf) || !in.append((ByteBuf) message)) |
| ReferenceCountUtil.release(message); |
| } |
| |
| @Override |
| public void channelInactive(ChannelHandlerContext ctx) |
| { |
| close(); |
| ctx.fireChannelInactive(); |
| } |
| |
| @Override |
| public void exceptionCaught(ChannelHandlerContext ctx, Throwable cause) |
| { |
| if (cause instanceof IOException) |
| logger.trace("connection problem while streaming", cause); |
| else |
| logger.warn("exception occurred while in processing streaming data", cause); |
| close(); |
| } |
| |
| /** Shutdown for in-JVM tests. For any other usage, tracking of active inbound streaming handlers |
| * should be revisted first and in-JVM shutdown refactored with it. |
| * This does not prevent new inbound handlers being added after shutdown, nor is not thread-safe |
| * around new inbound handlers being opened during shutdown. |
| */ |
| @VisibleForTesting |
| public static void shutdown() |
| { |
| assert trackInboundHandlers : "in-JVM tests required tracking of inbound streaming handlers"; |
| |
| inboundHandlers.forEach(NettyStreamingChannel::close); |
| inboundHandlers.clear(); |
| } |
| |
| public static void trackInboundHandlers() |
| { |
| inboundHandlers = Collections.newSetFromMap(new ConcurrentHashMap<>()); |
| trackInboundHandlers = true; |
| } |
| |
| } |