sailfish.remoting.codec.DefaultRemotingCodec.java Source code

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Here is the source code for sailfish.remoting.codec.DefaultRemotingCodec.java

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/**
 *
 *   Copyright 2016-2016 spccold
 *
 *   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 sailfish.remoting.codec;

import io.netty.buffer.ByteBuf;
import sailfish.remoting.constants.RemotingConstants;
import sailfish.remoting.exceptions.ExceptionCode;
import sailfish.remoting.exceptions.SailfishException;
import sailfish.remoting.protocol.RequestProtocol;
import sailfish.remoting.protocol.ResponseProtocol;
import sailfish.remoting.protocol.Protocol;

/**
 * 
 * @author spccold
 * @version $Id: DefaultRemotingCodec.java, v 0.1 20161015 ?4:52:20 jileng Exp $
 */
public class DefaultRemotingCodec implements RemotingCodec {

    public static final DefaultRemotingCodec INSTANCE = new DefaultRemotingCodec();

    private DefaultRemotingCodec() {
    }

    @Override
    public void encode(Protocol protocol, ByteBuf buffer) throws SailfishException {
        protocol.serialize(buffer);
    }

    @Override
    public Protocol decode(ByteBuf buffer) throws SailfishException {
        short magic = buffer.readShort();
        if (RemotingConstants.SAILFISH_MAGIC != magic) {
            throw new SailfishException(ExceptionCode.BAD_PACKAGE,
                    "bad packet, expected magic:" + RemotingConstants.SAILFISH_MAGIC + ", but actual:" + magic
                            + ", current channel will be closed!");
        }

        int totalLength = buffer.readInt();
        byte compactByte = buffer.getByte(buffer.readerIndex());
        boolean request = ((compactByte & RequestProtocol.REQUEST_FLAG) != 0);

        Protocol protocol;
        //recycle Protocol
        if (request) {//request
            protocol = RequestProtocol.newInstance();
        } else {//response
            protocol = ResponseProtocol.newInstance();
        }
        protocol.deserialize(buffer, totalLength);
        return protocol;
    }
}