com.jbrisbin.vpc.jobsched.mapred.MapReduceMessageConverter.java Source code

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Here is the source code for com.jbrisbin.vpc.jobsched.mapred.MapReduceMessageConverter.java

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/*
 * Copyright 2010 by J. Brisbin <jon@jbrisbin.com>
 *
 * 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 com.jbrisbin.vpc.jobsched.mapred;

import com.jbrisbin.vpc.jobsched.SecureMessageConverter;
import org.codehaus.jackson.map.JsonMappingException;
import org.springframework.amqp.core.Message;
import org.springframework.amqp.core.MessageProperties;
import org.springframework.amqp.support.converter.MessageConversionException;

import java.io.IOException;
import java.util.List;
import java.util.Map;

/**
 * @author Jon Brisbin <jon@jbrisbin.com>
 */
@SuppressWarnings({ "unchecked" })
public class MapReduceMessageConverter extends SecureMessageConverter {

    public Message toMessage(Object object, MessageProperties messageProperties) throws MessageConversionException {
        return null; //To change body of implemented methods use File | Settings | File Templates.
    }

    public Object fromMessage(Message message) throws MessageConversionException {
        MessageProperties props = message.getMessageProperties();
        if (isAuthorized(props)) {
            //Map<String, Object> headers = props.getHeaders();
            byte[] bytes = message.getBody();
            MapReduceMessage msg = new MapReduceMessage();
            msg.setId(new String(props.getCorrelationId()));
            try {
                msg.setReplyTo(props.getReplyTo().toString());
            } catch (NullPointerException ignored) {
            }
            msg.setKey(props.getHeaders().get("mapreduce.key").toString());
            msg.setSrc(props.getHeaders().get("mapreduce.src").toString());
            msg.setType(props.getReceivedRoutingKey());
            try {
                try {
                    msg.setData(mapObject(bytes, List.class));
                } catch (JsonMappingException e1) {
                    try {
                        msg.setData(mapObject(bytes, Map.class));
                    } catch (JsonMappingException e2) {
                        try {
                            msg.setData(mapObject(bytes, Integer.class));
                        } catch (JsonMappingException e3) {
                            try {
                                msg.setData(mapObject(bytes, String.class));
                            } catch (JsonMappingException e4) {
                            }
                        }
                    }
                }
            } catch (IOException ioe) {
                throw new MessageConversionException(ioe.getMessage(), ioe);
            }
            return msg;
        } else {
            throw new MessageConversionException("Invalid security key.");
        }
    }

}