org.apache.rocketmq.proxy.remoting.protocol.ProtocolNegotiationHandler Maven / Gradle / Ivy

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/*
 * 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.rocketmq.proxy.remoting.protocol;

import io.netty.buffer.ByteBuf;
import io.netty.channel.ChannelHandlerContext;
import io.netty.handler.codec.ByteToMessageDecoder;
import java.util.ArrayList;
import java.util.List;

public class ProtocolNegotiationHandler extends ByteToMessageDecoder {

    private final List protocolHandlerList = new ArrayList();
    private final ProtocolHandler fallbackProtocolHandler;

    public ProtocolNegotiationHandler(ProtocolHandler fallbackProtocolHandler) {
        this.fallbackProtocolHandler = fallbackProtocolHandler;
    }

    public ProtocolNegotiationHandler addProtocolHandler(ProtocolHandler protocolHandler) {
        protocolHandlerList.add(protocolHandler);
        return this;
    }

    @Override
    protected void decode(ChannelHandlerContext ctx, ByteBuf in, List