blob: 4e1ba91efb15e57ea532025478e8a3e2d8c4795a [file] [log] [blame]
/*
* 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.ignite.internal.processors.rest.client.message;
import java.util.Arrays;
import org.apache.ignite.internal.util.typedef.internal.U;
/**
* A client handshake request, containing version info and
* a marshaller ID.
*
* A handshake request structure is as follows:
* <ol>
* <li>Protocol version (2 bytes)</li>
* <li>Marshaller ID (2 bits)</li>
* <li>Reserved space (6 bits + 1 byte)</li>
* <li>Marshaller ID for backward compatibility (1 byte)</li>
* </ol>
*/
public class GridClientHandshakeRequest extends GridClientAbstractMessage {
/** */
private static final long serialVersionUID = 0L;
/** Packet size. */
static final int PACKET_SIZE = 5;
/** Protocol version. */
private static final short PROTO_VER = 1;
/** Handshake byte array. */
private byte[] arr;
/** Marshaller ID. */
private byte marshId;
/**
* @return Protocol version.
*/
public short version() {
return U.bytesToShort(arr, 0);
}
/**
* @return Marshaller ID.
*/
public byte marshallerId() {
return (byte)((arr[2] & 0xff) >> 6);
}
/**
* @param marshId Marshaller ID.
*/
public void marshallerId(byte marshId) {
assert marshId >= 0 && marshId <= 3;
this.marshId = marshId;
}
/**
* Sets bytes from specified buffer to a given value.
*
* @param buf Buffer.
* @param off Offset.
* @param len Length.
*/
public void putBytes(byte[] buf, int off, int len) {
if (arr == null)
arr = new byte[PACKET_SIZE];
U.arrayCopy(buf, 0, arr, off, len);
}
/**
* @return Raw representation of this packet.
*/
public byte[] rawBytes() {
byte[] ret = new byte[PACKET_SIZE];
U.shortToBytes(PROTO_VER, ret, 0);
ret[2] = (byte)(marshId << 6);
ret[4] = marshId; // Marshaller ID for backward compatibility.
return ret;
}
/** {@inheritDoc} */
@Override public String toString() {
return getClass().getSimpleName() + " [arr=" + Arrays.toString(arr) + ']';
}
}