/*
* 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.net;
import java.io.*;
import java.net.InetAddress;
import java.net.Socket;
import java.net.SocketException;
import java.util.zip.Checksum;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import net.jpountz.lz4.LZ4BlockInputStream;
import net.jpountz.lz4.LZ4Decompressor;
import net.jpountz.lz4.LZ4Factory;
import net.jpountz.xxhash.XXHashFactory;
import org.xerial.snappy.SnappyInputStream;
import org.apache.cassandra.config.DatabaseDescriptor;
import org.apache.cassandra.gms.Gossiper;
public class IncomingTcpConnection extends Thread
{
private static final Logger logger = LoggerFactory.getLogger(IncomingTcpConnection.class);
private final int version;
private final boolean compressed;
private final Socket socket;
public InetAddress from;
public IncomingTcpConnection(int version, boolean compressed, Socket socket)
{
assert socket != null;
this.version = version;
this.compressed = compressed;
this.socket = socket;
if (DatabaseDescriptor.getInternodeRecvBufferSize() != null)
{
try
{
this.socket.setReceiveBufferSize(DatabaseDescriptor.getInternodeRecvBufferSize());
}
catch (SocketException se)
{
logger.warn("Failed to set receive buffer size on internode socket.", se);
}
}
}
/**
* A new connection will either stream or message for its entire lifetime: because streaming
* bypasses the InputStream implementations to use sendFile, we cannot begin buffering until
* we've determined the type of the connection.
*/
@Override
public void run()
{
try
{
if (version < MessagingService.VERSION_20)
throw new UnsupportedOperationException(String.format("Unable to read obsolete message version %s; "
+ "The earliest version supported is 2.0.0",
version));
handleModernVersion();
}
catch (EOFException e)
{
logger.trace("eof reading from socket; closing", e);
// connection will be reset so no need to throw an exception.
}
catch (IOException e)
{
logger.debug("IOException reading from socket; closing", e);
}
finally
{
close();
}
}
private void handleModernVersion() throws IOException
{
DataOutputStream out = new DataOutputStream(socket.getOutputStream());
out.writeInt(MessagingService.current_version);
out.flush();
DataInputStream in = new DataInputStream(socket.getInputStream());
int maxVersion = in.readInt();
from = CompactEndpointSerializationHelper.deserialize(in);
if (compressed)
{
logger.debug("Upgrading incoming connection to be compressed");
if (version < MessagingService.VERSION_21)
in = new DataInputStream(new SnappyInputStream(socket.getInputStream()));
else
{
LZ4Decompressor decompressor = LZ4Factory.fastestInstance().decompressor();
Checksum checksum = XXHashFactory.fastestInstance().newStreamingHash32(OutboundTcpConnection.LZ4_HASH_SEED).asChecksum();
in = new DataInputStream(new LZ4BlockInputStream(socket.getInputStream(),
decompressor,
checksum));
}
}
else
{
in = new DataInputStream(new BufferedInputStream(socket.getInputStream(), 4096));
}
logger.debug("Max version for {} is {}", from, maxVersion);
if (version > MessagingService.current_version)
{
// save the endpoint so gossip will reconnect to it
Gossiper.instance.addSavedEndpoint(from);
logger.info("Received messages from newer protocol version {}. Ignoring", version);
return;
}
MessagingService.instance().setVersion(from, Math.min(MessagingService.current_version, maxVersion));
logger.debug("set version for {} to {}", from, Math.min(MessagingService.current_version, maxVersion));
// outbound side will reconnect if necessary to upgrade version
while (true)
{
MessagingService.validateMagic(in.readInt());
receiveMessage(in, version);
}
}
private InetAddress receiveMessage(DataInputStream input, int version) throws IOException
{
int id;
if (version < MessagingService.VERSION_20)
id = Integer.parseInt(input.readUTF());
else
id = input.readInt();
long timestamp = System.currentTimeMillis();
// make sure to readInt, even if cross_node_to is not enabled
int partial = input.readInt();
if (DatabaseDescriptor.hasCrossNodeTimeout())
timestamp = (timestamp & 0xFFFFFFFF00000000L) | (((partial & 0xFFFFFFFFL) << 2) >> 2);
MessageIn message = MessageIn.read(input, version, id);
if (message == null)
{
// callback expired; nothing to do
return null;
}
if (version <= MessagingService.current_version)
{
MessagingService.instance().receive(message, id, timestamp);
}
else
{
logger.debug("Received connection from newer protocol version {}. Ignoring message", version);
}
return message.from;
}
private void close()
{
// reset version here, since we set when starting an incoming socket
if (from != null)
MessagingService.instance().resetVersion(from);
try
{
socket.close();
}
catch (IOException e)
{
if (logger.isDebugEnabled())
logger.debug("error closing socket", e);
}
}
}