com.sirius.hadoop.job.onlinetime.StatusMapper.java Source code

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Here is the source code for com.sirius.hadoop.job.onlinetime.StatusMapper.java

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/*
 * *
 *  * Licensed to the Apache Software Foundation (ASF) under one
 *  * or more contributor license agreements.  See the NOTICE file
 *  * distributed with this work for additional information
 *  * regarding copyright ownership.  The ASF licenses this file
 *  * to you 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.sirius.hadoop.job.onlinetime;

import org.apache.commons.lang3.ObjectUtils;
import org.apache.commons.lang3.StringUtils;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.hadoop.io.Text;
import org.apache.hadoop.mapreduce.Mapper;
import org.codehaus.jackson.JsonParser.Feature;
import org.codehaus.jackson.map.ObjectMapper;

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

/**
 * Created by pippo on 14-9-19.
 */
public class StatusMapper extends Mapper<Object, Text, StatusKey, OnlineRecord> {

    private static final Log log = LogFactory.getLog(StatusMapper.class);

    private static final ObjectMapper mapper = new ObjectMapper();

    private static final StatusKey statusKey = new StatusKey();

    private static final OnlineRecord record = new OnlineRecord();

    static {
        mapper.configure(Feature.ALLOW_SINGLE_QUOTES, true);
    }

    @Override
    protected void map(Object key, Text value, Context context) throws IOException, InterruptedException {
        log.info(value.toString());

        Map<String, Object> m;
        try {
            m = mapper.readValue(value.toString(), Map.class);
        } catch (IOException e) {
            throw new RuntimeException(value.toString(), e);
        }

        statusKey.userId = (String) ObjectUtils.defaultIfNull(m.get("u"), StringUtils.EMPTY);
        statusKey.time = (Long) ObjectUtils.defaultIfNull(m.get("ct"), -1L);

        if ("online".equals(m.get("t"))) {
            record.onlineTime = statusKey.time;
            record.offlineTime = -1;
        } else {
            record.onlineTime = -1;
            record.offlineTime = statusKey.time;
        }

        context.write(statusKey, record);
    }

}