/*
* Copyright 2014 NAVER Corp.
*
* 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 com.navercorp.pinpoint.rpc.packet;
import org.jboss.netty.buffer.ChannelBuffer;
import org.jboss.netty.buffer.ChannelBuffers;
/**
* @author koo.taejin
*/
public class ControlHandshakePacket extends ControlPacket {
public ControlHandshakePacket(byte[] payload) {
super(payload);
}
public ControlHandshakePacket(int requestId, byte[] payload) {
super(payload);
setRequestId(requestId);
}
@Override
public short getPacketType() {
return PacketType.CONTROL_HANDSHAKE;
}
@Override
public ChannelBuffer toBuffer() {
ChannelBuffer header = ChannelBuffers.buffer(2 + 4 + 4);
header.writeShort(PacketType.CONTROL_HANDSHAKE);
header.writeInt(getRequestId());
return PayloadPacket.appendPayload(header, payload);
}
public static ControlHandshakePacket readBuffer(short packetType, ChannelBuffer buffer) {
assert packetType == PacketType.CONTROL_HANDSHAKE;
if (buffer.readableBytes() < 8) {
buffer.resetReaderIndex();
return null;
}
final int messageId = buffer.readInt();
final ChannelBuffer payload = PayloadPacket.readPayload(buffer);
if (payload == null) {
return null;
}
final ControlHandshakePacket helloPacket = new ControlHandshakePacket(payload.array());
helloPacket.setRequestId(messageId);
return helloPacket;
}
@Override
public String toString() {
final StringBuilder sb = new StringBuilder();
sb.append(this.getClass().getSimpleName());
sb.append("{requestId=").append(getRequestId());
sb.append(", ");
if (payload == null) {
sb.append("payload=null");
} else {
sb.append("payloadLength=").append(payload.length);
}
sb.append('}');
return sb.toString();
}
}