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/*
* Copyright 2014-2015 Open Networking Laboratory
*
* 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 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.onlab.netty;
import io.netty.buffer.ByteBuf;
import io.netty.channel.ChannelHandler.Sharable;
import io.netty.channel.ChannelHandlerContext;
import io.netty.handler.codec.MessageToByteEncoder;
import java.io.IOException;
import org.onlab.packet.IpAddress;
import org.onlab.packet.IpAddress.Version;
import org.onosproject.store.cluster.messaging.Endpoint;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import com.google.common.base.Charsets;
/**
* Encode InternalMessage out into a byte buffer.
*/
@Sharable
public class MessageEncoder extends MessageToByteEncoder<InternalMessage> {
private final int preamble;
public MessageEncoder(int preamble) {
super();
this.preamble = preamble;
}
private final Logger log = LoggerFactory.getLogger(getClass());
@Override
protected void encode(
ChannelHandlerContext context,
InternalMessage message,
ByteBuf out) throws Exception {
out.writeInt(this.preamble);
// write message id
out.writeLong(message.id());
Endpoint sender = message.sender();
IpAddress senderIp = sender.host();
if (senderIp.version() == Version.INET) {
out.writeByte(0);
} else {
out.writeByte(1);
}
out.writeBytes(senderIp.toOctets());
// write sender port
out.writeInt(sender.port());
byte[] messageTypeBytes = message.type().getBytes(Charsets.UTF_8);
// write length of message type
out.writeInt(messageTypeBytes.length);
// write message type bytes
out.writeBytes(messageTypeBytes);
byte[] payload = message.payload();
// write payload length
out.writeInt(payload.length);
// write payload.
out.writeBytes(payload);
}
@Override
public void exceptionCaught(ChannelHandlerContext context, Throwable cause) {
if (cause instanceof IOException) {
log.debug("IOException inside channel handling pipeline.", cause);
} else {
log.error("non-IOException inside channel handling pipeline.", cause);
}
context.close();
}
}
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