org.sf.xrime.algorithms.BCApproximation.BCBackwardStep.java Source code

Introduction

Here is the source code for org.sf.xrime.algorithms.BCApproximation.BCBackwardStep.java

Source

/*
 * Copyright (C) yangcheng@BUPT. 2009.
 * 
 * Licensed 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 org.sf.xrime.algorithms.BCApproximation;

import java.io.IOException;

import org.apache.hadoop.fs.FileSystem;
import org.apache.hadoop.io.Text;
import org.apache.hadoop.mapred.FileInputFormat;
import org.apache.hadoop.mapred.FileOutputFormat;
import org.apache.hadoop.mapred.JobClient;
import org.apache.hadoop.mapred.JobConf;
import org.apache.hadoop.mapred.SequenceFileInputFormat;
import org.apache.hadoop.mapred.SequenceFileOutputFormat;

import org.sf.xrime.ProcessorExecutionException;
import org.sf.xrime.algorithms.GraphAlgorithm;
import org.sf.xrime.model.vertex.LabeledAdjBiSetVertex;
import org.sf.xrime.utils.SequenceTempDirMgr;

public class BCBackwardStep extends GraphAlgorithm {
    //private String continueFileName="continue";
    //static final public String continueFileKey="xrime.algorithm.BC.continue.flag";
    private boolean end = false;

    private JobConf jobConf;
    private FileSystem client = null;

    private SequenceTempDirMgr tempDirs = null;
    private int dist;
    //static private int cishu=1;

    /*
    public String getContinueFlag() {
      return continueFileName;
    }
        
    public void setContinueFlag(String continueFlag) {
      this.continueFileName = continueFlag;
    }
        
    private String continueFlagFile() throws IllegalAccessException {
      Path filePath=new Path(context.getDestination().getPath().toString()+"/"+continueFileName);
        return filePath.toString();
    }
    */

    public void setDistance(int distance) {
        dist = distance;
    }

    public int getDistance() {
        return dist;
    }

    public boolean isEnd() {
        return end;
    }

    public FileSystem getClient() {
        return client;
    }

    public void setClient(FileSystem client) {
        this.client = client;
    }

    public SequenceTempDirMgr getTempDirs() {
        return tempDirs;
    }

    public void setTempDirs(SequenceTempDirMgr tempDirs) {
        this.tempDirs = tempDirs;
    }

    @Override
    public void execute() throws ProcessorExecutionException {
        try {
            context.setParameter("distance", Integer.toString(dist));

            jobConf = new JobConf(context, BCBackwardStep.class);
            jobConf.setJobName("BC");

            jobConf.setMapperClass(BCBackwardMapper.class);
            jobConf.setReducerClass(BCBackwardReducer.class);

            //jobConf.setNumMapTasks(getMapperNum());        
            jobConf.setNumMapTasks(1);
            //jobConf.setNumReduceTasks(getReducerNum());
            jobConf.setNumReduceTasks(1);

            jobConf.setMapOutputValueClass(LabeledAdjBiSetVertex.class);
            jobConf.setOutputKeyClass(Text.class);
            jobConf.setOutputValueClass(LabeledAdjBiSetVertex.class);

            jobConf.setInputFormat(SequenceFileInputFormat.class);
            jobConf.setOutputFormat(SequenceFileOutputFormat.class);

            FileInputFormat.setInputPaths(jobConf, context.getSource().getPath());
            FileOutputFormat.setOutputPath(jobConf, context.getDestination().getPath());

            this.runningJob = JobClient.runJob(jobConf);
            if (dist > 0) {
                end = false;
            } else
                end = true;
        } catch (IOException e) {
            throw new ProcessorExecutionException(e);
        } catch (IllegalAccessException e) {
            e.printStackTrace();
        }
    }
}