/*
* 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.messages;
import java.io.DataInput;
import java.io.IOException;
import java.net.InetAddress;
import java.nio.ByteBuffer;
import java.util.UUID;
import org.apache.cassandra.db.TypeSizes;
import org.apache.cassandra.io.IVersionedSerializer;
import org.apache.cassandra.io.util.DataOutputBuffer;
import org.apache.cassandra.io.util.DataOutputPlus;
import org.apache.cassandra.net.CompactEndpointSerializationHelper;
import org.apache.cassandra.net.MessagingService;
import org.apache.cassandra.utils.UUIDSerializer;
/**
* StreamInitMessage is first sent from the node where {@link org.apache.cassandra.streaming.StreamSession} is started,
* to initiate corresponding {@link org.apache.cassandra.streaming.StreamSession} on the other side.
*/
public class StreamInitMessage
{
public static IVersionedSerializer<StreamInitMessage> serializer = new StreamInitMessageSerializer();
public final InetAddress from;
public final int sessionIndex;
public final UUID planId;
public final String description;
// true if this init message is to connect for outgoing message on receiving side
public final boolean isForOutgoing;
public StreamInitMessage(InetAddress from, int sessionIndex, UUID planId, String description, boolean isForOutgoing)
{
this.from = from;
this.sessionIndex = sessionIndex;
this.planId = planId;
this.description = description;
this.isForOutgoing = isForOutgoing;
}
/**
* Create serialized message.
*
* @param compress true if message is compressed
* @param version Streaming protocol version
* @return serialized message in ByteBuffer format
*/
public ByteBuffer createMessage(boolean compress, int version)
{
int header = 0;
// set compression bit.
if (compress)
header |= 4;
// set streaming bit
header |= 8;
// Setting up the version bit
header |= (version << 8);
byte[] bytes;
try
{
int size = (int)StreamInitMessage.serializer.serializedSize(this, version);
DataOutputBuffer buffer = new DataOutputBuffer(size);
StreamInitMessage.serializer.serialize(this, buffer, version);
bytes = buffer.getData();
}
catch (IOException e)
{
throw new RuntimeException(e);
}
assert bytes.length > 0;
ByteBuffer buffer = ByteBuffer.allocate(4 + 4 + bytes.length);
buffer.putInt(MessagingService.PROTOCOL_MAGIC);
buffer.putInt(header);
buffer.put(bytes);
buffer.flip();
return buffer;
}
private static class StreamInitMessageSerializer implements IVersionedSerializer<StreamInitMessage>
{
public void serialize(StreamInitMessage message, DataOutputPlus out, int version) throws IOException
{
CompactEndpointSerializationHelper.serialize(message.from, out);
out.writeInt(message.sessionIndex);
UUIDSerializer.serializer.serialize(message.planId, out, MessagingService.current_version);
out.writeUTF(message.description);
out.writeBoolean(message.isForOutgoing);
}
public StreamInitMessage deserialize(DataInput in, int version) throws IOException
{
InetAddress from = CompactEndpointSerializationHelper.deserialize(in);
int sessionIndex = in.readInt();
UUID planId = UUIDSerializer.serializer.deserialize(in, MessagingService.current_version);
String description = in.readUTF();
boolean sentByInitiator = in.readBoolean();
return new StreamInitMessage(from, sessionIndex, planId, description, sentByInitiator);
}
public long serializedSize(StreamInitMessage message, int version)
{
long size = CompactEndpointSerializationHelper.serializedSize(message.from);
size += TypeSizes.NATIVE.sizeof(message.sessionIndex);
size += UUIDSerializer.serializer.serializedSize(message.planId, MessagingService.current_version);
size += TypeSizes.NATIVE.sizeof(message.description);
size += TypeSizes.NATIVE.sizeof(message.isForOutgoing);
return size;
}
}
}