com.trexinhca.TrexinHCATest.java Source code

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Here is the source code for com.trexinhca.TrexinHCATest.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.trexinhca;

import java.io.IOException;

import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.fs.Path;
import org.apache.hadoop.mapreduce.lib.output.TextOutputFormat;
import org.apache.hadoop.io.Text;
import org.apache.hadoop.mapreduce.Job;
import org.apache.hadoop.mapreduce.Mapper;
import org.apache.hadoop.mapreduce.Reducer;
import org.apache.hadoop.mapreduce.lib.input.FileInputFormat;
import org.apache.hadoop.mapreduce.lib.output.FileOutputFormat;
import org.apache.hadoop.util.GenericOptionsParser;
import org.kie.api.KieServices;
import org.kie.api.runtime.KieContainer;
import org.kie.api.runtime.KieSession;
import org.kie.api.runtime.rule.FactHandle;
import com.trexinhca.MapperMessage;
import com.trexinhca.ReducerMessage;

import java.util.Iterator;

public class TrexinHCATest {

    public static KieServices ks;
    public static KieContainer kContainer;
    public static KieSession ksession;

    public static KieSession getKsession() {
        if (ksession == null) {
            ks = KieServices.Factory.get();
            kContainer = ks.getKieClasspathContainer();
            ksession = TrexinHCATest.kContainer.newKieSession("MapReduceKS");
        }
        ;
        return ksession;

    }

    public static class TokenizerMapper extends Mapper<Object, Text, Text, Text> {

        public void map(Object key, Text value, Context context) throws IOException, InterruptedException {

            // System.out.println( strings.length );

            //    System.out.println("Made it 1");
            // long startTime = System.nanoTime();
            //      System.out.println(key);
            //      System.out.println(value.toString());
            MapperMessage message = new MapperMessage(value.toString());
            //      System.out.println("Made it 2");

            FactHandle fh = TrexinHCATest.getKsession().insert(message);
            //         System.out.println("Made it 3");
            TrexinHCATest.ksession.fireAllRules();
            //      System.out.println("Made it 4");
            TrexinHCATest.ksession.delete(fh);
            //   System.out.println("Made it to rules");
            // long endTime = System.nanoTime();
            // long duration = (endTime - startTime); 
            // System.out.println(duration)
            Iterator<String> iterator = message.getClassifications().iterator();
            while (iterator.hasNext()) {
                Text newKey = new Text(iterator.next());
                //   System.out.println(newKey);
                context.write(newKey, new Text(message.toString()));

            }

        }
    }

    public static class TrexinHCAReducer extends Reducer<Text, Text, Text, Text> {

        @Override
        public void reduce(Text key, Iterable<Text> values, Context context)
                throws IOException, InterruptedException {
            Iterator<Text> iterator = values.iterator();
            ReducerMessage reducedMessage = new ReducerMessage(iterator.next().toString());
            while (iterator.hasNext()) {
                ReducerMessage consumedMessage = new ReducerMessage(iterator.next().toString());
                reducedMessage.consume(consumedMessage);
            }

            Text textResult = new Text(reducedMessage.toString());
            context.write(key, textResult);
        }
    }

    public static void main(String[] args) throws Exception {

        ks = KieServices.Factory.get();
        kContainer = ks.getKieClasspathContainer();
        ksession = TrexinHCATest.kContainer.newKieSession("MapReduceKS");
        Configuration conf = new Configuration();
        String[] otherArgs = new GenericOptionsParser(conf, args).getRemainingArgs();
        if (otherArgs.length < 2) {
            System.err.println("Usage: TrexinHCATest <in> [<in>...] <out>");
            System.exit(2);
        }
        Job job = Job.getInstance(conf);
        job.setJobName("HCATest");
        job.setMapperClass(TokenizerMapper.class);
        job.setCombinerClass(TrexinHCAReducer.class);
        job.setReducerClass(TrexinHCAReducer.class);
        job.setMapOutputKeyClass(Text.class);
        job.setMapOutputValueClass(Text.class);
        job.setOutputKeyClass(TextOutputFormat.class);
        job.setOutputValueClass(Text.class);
        FileInputFormat.addInputPath(job, new Path(otherArgs[0]));
        FileOutputFormat.setOutputPath(job, new Path(otherArgs[1]));
        job.setJarByClass(TrexinHCATest.class);
        job.waitForCompletion(true);

    }

}