/*
* 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.parse;
import io.covert.dns.util.JsonUtils;
import org.apache.hadoop.io.BytesWritable;
import org.apache.hadoop.io.Text;
import org.apache.hadoop.mapreduce.Mapper;
import org.xbill.DNS.Message;
import org.xbill.DNS.Record;
import org.xbill.DNS.Section;
public class ParseMapper extends Mapper<Text, BytesWritable, Text, Text> {
Text outKey = new Text("");
Text outVal = new Text("");
boolean ignoreTTL = true;
protected void setup(Context context) throws java.io.IOException, InterruptedException
{
ignoreTTL = context.getConfiguration().getBoolean("parse.ignore.ttl", true);
}
protected void map(Text key, BytesWritable value, Context context) throws java.io.IOException ,InterruptedException
{
try {
Message msg = new Message(value.getBytes());
int[] sections = {Section.ANSWER, Section.ADDITIONAL, Section.AUTHORITY};
for(int section : sections)
{
for(Record record : msg.getSectionArray(section))
{
String json = JsonUtils.toJson(record, ignoreTTL);
outKey.set(json);
context.write(outKey, outVal);
}
}
} catch (Exception e) {
context.getCounter(getClass().getSimpleName(), "PARSE_FAIL").increment(1);
e.printStackTrace();
}
}
}