com.allanbank.mongodb.netty.NettyReplyHandler.java Source code

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Here is the source code for com.allanbank.mongodb.netty.NettyReplyHandler.java

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/*
 * #%L
 * NettyReplyHandler.java - mongodb-async-netty - Allanbank Consulting, Inc.
 * %%
 * Copyright (C) 2014 - 2015 Allanbank Consulting, Inc.
 * %%
 * 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.
 * #L%
 */
package com.allanbank.mongodb.netty;

import io.netty.channel.ChannelHandlerContext;
import io.netty.channel.ChannelInboundHandlerAdapter;

import com.allanbank.mongodb.client.Message;
import com.allanbank.mongodb.client.transport.TransportResponseListener;
import com.allanbank.mongodb.client.transport.bio.MessageInputBuffer;
import com.allanbank.mongodb.util.log.Log;
import com.allanbank.mongodb.util.log.LogFactory;

/**
 * NettyReplyHandler provides a class to handle replies in the Netty pipeline.
 *
 * @copyright 2015, Allanbank Consulting, Inc., All Rights Reserved
 */
final class NettyReplyHandler extends ChannelInboundHandlerAdapter {

    /** The logger for the transport. */
    private static final Log LOG = LogFactory.getLog(NettyReplyHandler.class);

    /** The listener for the responses. */
    private final TransportResponseListener myResponseListener;

    /**
     * Creates a new NettyReplyHandler.
     *
     * @param listener
     *            The listener for the responses.
     */
    public NettyReplyHandler(final TransportResponseListener listener) {
        super();
        myResponseListener = listener;
    }

    /**
     * {@inheritDoc}
     * <p>
     * If the message is a {@link Message} then forwards the message to the
     * {@link TransportResponseListener}.
     * </p>
     */
    @Override
    public void channelRead(final ChannelHandlerContext ctx, final Object msg) {
        if (msg instanceof Message) {
            myResponseListener.response(new MessageInputBuffer(((Message) msg)));
        } else {
            LOG.warn("Received a non-message: {}.", msg);
            ctx.close();
        }
    }
}