edu.iu.daal_cov.COVUtil.java Source code

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Here is the source code for edu.iu.daal_cov.COVUtil.java

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/*
 * Copyright 2013-2016 Indiana University
 * 
 * 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 edu.iu.daal_cov;

import it.unimi.dsi.fastutil.ints.IntArrays;

import java.io.BufferedWriter;
import java.io.File;
import java.io.IOException;
import java.io.OutputStreamWriter;
import java.util.LinkedList;
import java.util.List;
import java.util.Random;
import java.util.concurrent.ExecutionException;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
import java.util.concurrent.Future;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.fs.FSDataOutputStream;
import org.apache.hadoop.fs.FileSystem;
import org.apache.hadoop.fs.Path;

import edu.iu.harp.schdynamic.DynamicScheduler;
import edu.iu.harp.partition.Partition;
import edu.iu.harp.partition.Table;
import edu.iu.harp.resource.DoubleArray;

public class COVUtil {
    protected static final Log LOG = LogFactory.getLog(COVUtil.class);

    public static List<double[]> loadPoints(List<String> fileNames, int pointsPerFile, int cenVecSize,
            Configuration conf, int numThreads) {
        long startTime = System.currentTimeMillis();
        List<PointLoadTask> tasks = new LinkedList<>();
        List<double[]> arrays = new LinkedList<double[]>();
        for (int i = 0; i < numThreads; i++) {
            tasks.add(new PointLoadTask(pointsPerFile, cenVecSize, conf));
        }
        DynamicScheduler<String, double[], PointLoadTask> compute = new DynamicScheduler<>(tasks);
        for (String fileName : fileNames) {
            compute.submit(fileName);
        }
        compute.start();
        compute.stop();
        while (compute.hasOutput()) {
            double[] output = compute.waitForOutput();
            if (output != null) {
                arrays.add(output);
            }
        }
        long endTime = System.currentTimeMillis();
        System.out
                .println("File read (ms): " + (endTime - startTime) + ", number of point arrays: " + arrays.size());
        return arrays;
    }
}