| /* |
| * 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) + ']'; |
| } |
| } |