com.ifeng.hadoop.thinker.LogMapper.java Source code

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Here is the source code for com.ifeng.hadoop.thinker.LogMapper.java

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/*
 * Copyright 2010-2014 the original author or authors.
 *
 * 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.ifeng.hadoop.thinker;

import java.io.IOException;

import org.apache.hadoop.io.LongWritable;
import org.apache.hadoop.io.Text;
import org.apache.hadoop.mapreduce.Mapper;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

/**
 * @version 0.1
 *
 * @author Hefei Li
 *
 * @since  Apr 27, 2015
 */
public class LogMapper extends Mapper<LongWritable, Text, Text, Text> {

    private static final Logger log = LoggerFactory.getLogger(LogMapper.class);

    /* (non-Javadoc)
     * @see org.apache.hadoop.mapreduce.Mapper#map(java.lang.Object, java.lang.Object, org.apache.hadoop.mapreduce.Mapper.Context)
     */
    @Override
    protected void map(LongWritable key, Text value, Mapper<LongWritable, Text, Text, Text>.Context context)
            throws IOException, InterruptedException {

        try {
            if (value != null && value.toString().trim().length() > 0) {
                String line = value.toString();
                String[] items = line.split("\\s+");
                if (items.length == 3) {
                    if (items[0] != null && items[1] != null && items[2] != null) {
                        String name = items[0];
                        String swift = items[1].trim();
                        String origin = items[2].trim();

                        if (swift.split(":").length == 2 && origin.split(":").length == 2) {
                            swift = swift.split(":")[1];
                            origin = origin.split(":")[1];

                            long swfitSize = Long.parseLong(swift);
                            long originSize = Long.parseLong(origin);

                            LogModel model = new LogModel(name, swfitSize, originSize, (swfitSize - originSize));
                            context.write(new Text(name), new Text(model.toString()));
                        } else {
                            log.info("Invalid line: ", value.toString());
                        }
                    }

                } else {

                    log.info("Invalid line: ", value.toString());
                }

            }
        } catch (NumberFormatException e) {
            log.error(e.getMessage(), e);
        }
    }

}