| /* |
| * 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; |
| |
| import com.google.common.annotations.VisibleForTesting; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| import org.apache.cassandra.locator.InetAddressAndPort; |
| import org.apache.cassandra.streaming.messages.KeepAliveMessage; |
| import org.apache.cassandra.streaming.messages.StreamMessage; |
| import org.apache.cassandra.utils.JVMStabilityInspector; |
| |
| import static org.apache.cassandra.streaming.StreamSession.createLogTag; |
| |
| /** |
| * The task that performs the actual deserialization. |
| */ |
| public class StreamDeserializingTask implements Runnable |
| { |
| private static final Logger logger = LoggerFactory.getLogger(StreamDeserializingTask.class); |
| |
| private final StreamingChannel channel; |
| private final int messagingVersion; |
| @VisibleForTesting |
| protected StreamSession session; |
| |
| public StreamDeserializingTask(StreamSession session, StreamingChannel channel, int messagingVersion) |
| { |
| this.session = session; |
| this.channel = channel; |
| this.messagingVersion = messagingVersion; |
| } |
| |
| @Override |
| public void run() |
| { |
| @SuppressWarnings("resource") // closed in finally |
| StreamingDataInputPlus input = channel.in(); |
| try |
| { |
| StreamMessage message; |
| while (null != (message = StreamMessage.deserialize(input, messagingVersion))) |
| { |
| // keep-alives don't necessarily need to be tied to a session (they could be arrive before or after |
| // wrt session lifecycle, due to races), just log that we received the message and carry on |
| if (message instanceof KeepAliveMessage) |
| { |
| if (logger.isDebugEnabled()) |
| logger.debug("{} Received {}", createLogTag(session, channel), message); |
| continue; |
| } |
| |
| if (session == null) |
| session = deriveSession(message); |
| |
| if (logger.isDebugEnabled()) |
| logger.debug("{} Received {}", createLogTag(session, channel), message); |
| |
| session.messageReceived(message); |
| } |
| } |
| catch (Throwable t) |
| { |
| JVMStabilityInspector.inspectThrowable(t); |
| if (session != null) |
| { |
| session.onError(t); |
| } |
| else if (t instanceof StreamReceiveException) |
| { |
| ((StreamReceiveException)t).session.onError(t.getCause()); |
| } |
| else |
| { |
| logger.error("{} stream operation from {} failed", createLogTag(session, channel), InetAddressAndPort.toString(channel.peer(), true), t); |
| } |
| } |
| finally |
| { |
| channel.close(); |
| input.close(); |
| } |
| } |
| |
| @VisibleForTesting |
| public StreamSession deriveSession(StreamMessage message) |
| { |
| // StreamInitMessage starts a new channel here, but IncomingStreamMessage needs a session |
| // to be established a priori |
| StreamSession streamSession = message.getOrCreateAndAttachInboundSession(channel, messagingVersion); |
| |
| // Attach this channel to the session: this only happens upon receiving the first init message as a follower; |
| // in all other cases, no new control channel will be added, as the proper control channel will be already attached. |
| streamSession.attachInbound(channel); |
| return streamSession; |
| } |
| } |