io.covert.dns.geo.GeoMapper.java Source code

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Here is the source code for io.covert.dns.geo.GeoMapper.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 io.covert.dns.geo;

import java.util.Map;

import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.io.Text;
import org.apache.hadoop.mapreduce.Mapper;
import org.codehaus.jackson.map.ObjectMapper;
import org.codehaus.jackson.type.TypeReference;

import com.maxmind.geoip.LookupService;

public class GeoMapper extends Mapper<Text, Text, Text, Text> {

    IpGeo geo;
    ObjectMapper objectMapper = new ObjectMapper();
    Text outKey = new Text();

    protected void setup(Context context) throws java.io.IOException, InterruptedException {
        Configuration conf = context.getConfiguration();
        geo = new IpGeo(conf.get("maxmind.geo.database.file"), conf.get("maxmind.asn.database.file"),
                LookupService.GEOIP_MEMORY_CACHE);
    }

    protected void map(Text json, Text empty, Context context) throws java.io.IOException, InterruptedException {
        Map<String, Object> rec = objectMapper.readValue(json.getBytes(), new TypeReference<Map<String, Object>>() {
        });
        String ip = (String) rec.get("addr");
        if (ip != null) {
            // annotate with IP Geo info...
            Map<String, Object> loc = geo.getLocation(ip);
            rec.putAll(loc);
            outKey.set(objectMapper.writeValueAsBytes(rec));
            context.write(outKey, empty);
        } else {
            // No Geo, but pass through anyway
            context.write(json, empty);
        }
    }

    protected void cleanup(Context context) throws java.io.IOException, InterruptedException {
        if (geo != null)
            geo.close();
    }
}