jstorm-core/src/main/java/com/alibaba/jstorm/message/netty/MessageEncoder.java

/**
 * 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 com.alibaba.jstorm.message.netty;

import org.jboss.netty.channel.Channel;
import org.jboss.netty.channel.ChannelHandlerContext;
import org.jboss.netty.handler.codec.oneone.OneToOneEncoder;

public class MessageEncoder extends OneToOneEncoder {
    @Override
    protected Object encode(ChannelHandlerContext ctx, Channel channel, Object obj) throws Exception {
        if (obj instanceof ControlMessage) {
            return ((ControlMessage) obj).buffer();
        }

        if (obj instanceof MessageBatch) {
            return ((MessageBatch) obj).buffer();
        }

        throw new RuntimeException("Unsupported encoding of object of class " + obj.getClass().getName());
    }

}