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Mongo emulation layer for Usergrid system.

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/*******************************************************************************
 * Copyright 2012 Apigee Corporation
 * 
 * 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 org.usergrid.mongo.testproxy;

import org.jboss.netty.channel.ChannelHandlerContext;
import org.jboss.netty.channel.ExceptionEvent;
import org.jboss.netty.channel.MessageEvent;
import org.jboss.netty.channel.SimpleChannelUpstreamHandler;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.usergrid.mongo.protocol.Message;
import org.usergrid.mongo.protocol.OpReply;

public class MongoProxyServerHandler extends SimpleChannelUpstreamHandler {

	private static final Logger logger = LoggerFactory
			.getLogger(MongoProxyServerHandler.class);

	@Override
	public void messageReceived(ChannelHandlerContext ctx, MessageEvent e) {

		Message message = null;
		if (e.getMessage() instanceof Message) {
			message = (Message) e.getMessage();
		}

		OpReply reply = OpReply.errorReply("not implemented");

		if (message != null) {
			logger.info(message.getClass().getName());
			reply.setResponseTo(message.getRequestID());
		}

		e.getChannel().write(reply);
	}

	@Override
	public void exceptionCaught(ChannelHandlerContext ctx, ExceptionEvent e) {
		logger.warn("Unexpected exception from downstream.", e.getCause());
		e.getChannel().close();
	}
}