WebServerLog2Json.java

/*
* Copyright 2013 Produban
*
* 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.produban.openbus.util;

import java.util.Map;

import org.json.JSONObject;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import storm.trident.operation.BaseFunction;
import storm.trident.operation.TridentCollector;
import storm.trident.operation.TridentOperationContext;
import storm.trident.tuple.TridentTuple;
import backtype.storm.tuple.Values;


/**
 * Convert Web Server logs messages Avro format Json format    
 */
public class WebServerLog2Json extends BaseFunction {
	private static final long serialVersionUID = -3689028087205157458L;
	private static Logger LOG = LoggerFactory.getLogger(WebServerLog2Json.class);
	
	@SuppressWarnings("rawtypes")
	@Override
	public void prepare(Map conf, TridentOperationContext context) {
	}
    
    @Override
    public final void execute(final TridentTuple tuple, final TridentCollector collector) {        
        try {        	        	
            JSONObject json = new JSONObject(tuple.getString(0));
            if (LOG.isDebugEnabled()) {
            	LOG.debug("Tuple: " + tuple.getString(0));
            	LOG.debug("Message: " + json.toString());
            }
            
			long timestamp = FormatUtil.getDateInFormatTimeStamp(json.getString("datetime"));		    
            collector.emit(new Values(json.get("host"), 
            		json.get("log"), 
            		json.get("user"), 
            		json.get("datetime"), 
		    		json.get("request"), 
		    		json.get("status"), 
		    		json.get("size"), 
		    		json.get("referer"), 
		    		json.get("userAgent"), 
		    		json.get("session"), 
		    		json.get("responseTime"), 		    		
		    		String.valueOf(timestamp),
		    		json.toString(),
		    		json.toString().substring(0, json.toString().length() -1) 
						+ ", \"timestamp\": " + "\"" + String.valueOf(timestamp) + "\"}"));				    		               
        } catch (Exception e) {
        	LOG.error("Caught JSONException: " + tuple.getString(0), e); 
		} 
    }
}