io.covert.dns.collection.DnsRequestInputFormat.java Source code

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Here is the source code for io.covert.dns.collection.DnsRequestInputFormat.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.collection;

import io.covert.util.Utils;

import java.io.IOException;
import java.util.Arrays;
import java.util.Collection;
import java.util.LinkedList;
import java.util.List;

import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.io.Text;
import org.apache.hadoop.mapreduce.InputSplit;
import org.apache.hadoop.mapreduce.Job;
import org.apache.hadoop.mapreduce.RecordReader;
import org.apache.hadoop.mapreduce.TaskAttemptContext;
import org.apache.hadoop.mapreduce.lib.input.FileInputFormat;
import org.xbill.DNS.DClass;
import org.xbill.DNS.Type;

public class DnsRequestInputFormat extends FileInputFormat<Text, DnsRequest> {

    @Override
    public RecordReader<Text, DnsRequest> createRecordReader(InputSplit split, TaskAttemptContext context)
            throws IOException, InterruptedException {

        Configuration conf = context.getConfiguration();

        int dclass = DClass.value(conf.get("dns.request.dclass", "IN"));
        List<String> subdomains = Arrays.asList(conf.get("dns.requests.subdomains", "").split(","));

        List<Integer> types = new LinkedList<Integer>();
        for (String type : conf.get("dns.request.types", "A").split(","))
            types.add(Type.value(type));

        return new DnsRequestRecordReader(subdomains, types, dclass);
    }

    public static void configure(Job job, String dclass, Collection<String> recordTypes,
            Collection<String> subDomains) {
        Configuration conf = job.getConfiguration();
        conf.set("dns.request.dclass", dclass);
        conf.set("dns.request.types", Utils.join(",", recordTypes));
        conf.set("dns.requests.subdomains", Utils.join(",", subDomains));
    }
}