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    • nats.codec.AbstractClientInboundMessageHandlerAdapter Maven / Gradle / Ivy

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    /*
 *   Copyright (c) 2013 Mike Heath.  All rights reserved.
 *
 *   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 nats.codec;

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

/**
 * @author Mike Heath 
 */
public abstract class AbstractClientInboundMessageHandlerAdapter extends ChannelInboundHandlerAdapter {

	@Override
	public void messageReceived(ChannelHandlerContext context, MessageList messages) throws Exception {
		for (Object message : messages) {
			final ServerFrame frame = (ServerFrame) message;
			if (frame instanceof ServerPublishFrame) {
				publishedMessage(context, (ServerPublishFrame) frame);
			} else if (frame instanceof ServerPingFrame) {
				serverPing(context);
			} else if (frame instanceof ServerOkFrame) {
				okResponse(context, (ServerOkFrame) frame);
			} else if (frame instanceof ServerErrorFrame) {
				errorResponse(context, (ServerErrorFrame) frame);
			} else if (frame instanceof ServerPongFrame) {
				pongResponse(context, (ServerPongFrame) frame);
			} else if (frame instanceof ServerInfoFrame) {
				serverInfo(context, (ServerInfoFrame) frame);
			} else {
				throw new Error("Received a server response of an unknown type: " + frame.getClass().getName());
			}
		}
	}

	protected abstract void publishedMessage(ChannelHandlerContext context, ServerPublishFrame frame);

	protected void serverPing(ChannelHandlerContext context) {
		context.write(ClientPongFrame.PONG);
	}

	protected abstract void pongResponse(ChannelHandlerContext context, ServerPongFrame pongFrame);

	protected abstract void serverInfo(ChannelHandlerContext context, ServerInfoFrame infoFrame);

	protected abstract void okResponse(ChannelHandlerContext context, ServerOkFrame okFrame);

	protected abstract void errorResponse(ChannelHandlerContext ctx, ServerErrorFrame errorFrame);

}
    
    
    
    

    




    
    
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