io.hops.experiments.stats.TransactionStatsAggregator.java Source code

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Here is the source code for io.hops.experiments.stats.TransactionStatsAggregator.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.hops.experiments.stats;

import com.google.common.collect.Maps;
import org.apache.commons.math3.stat.descriptive.DescriptiveStatistics;

import java.io.BufferedReader;
import java.io.File;
import java.io.FileReader;
import java.io.IOException;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
import java.util.Map;

public class TransactionStatsAggregator {

    public final static String ALL = "*";
    private final File statsCSVFile;
    private final String transaction;
    private final String headerPattern;

    public TransactionStatsAggregator(File statsCSVFile, String transaction, String headerPattern) {
        this.statsCSVFile = statsCSVFile;
        this.transaction = transaction.toUpperCase();
        this.headerPattern = headerPattern.toUpperCase();
    }

    public void aggregate() throws IOException {
        aggregate(statsCSVFile, headerPattern, transaction, true);
    }

    public static Map<String, DescriptiveStatistics> aggregate(File statsFile, String transaction)
            throws IOException {
        return aggregate(statsFile, ALL, transaction, false);
    }

    public static Map<String, DescriptiveStatistics> aggregate(File statsFile, String header, String transaction)
            throws IOException {
        return aggregate(statsFile, header, transaction, false);
    }

    public static Map<String, DescriptiveStatistics> aggregate(File statsFile, String headerPattern,
            String transaction, boolean printSummary) throws IOException {
        if (!statsFile.exists())
            return null;

        transaction = transaction.toUpperCase();

        BufferedReader reader = new BufferedReader(new FileReader(statsFile));
        String tx = reader.readLine();
        String[] headers = null;
        Map<Integer, DescriptiveStatistics> statistics = Maps.newHashMap();
        if (tx != null) {
            headers = tx.split(",");
            for (int i = 1; i < headers.length; i++) {
                String h = headers[i].toUpperCase();
                if (h.contains(headerPattern) || headerPattern.equals(ALL)) {
                    statistics.put(i, new DescriptiveStatistics());
                }
            }
        }

        int txCount = 0;
        while ((tx = reader.readLine()) != null) {
            if (tx.startsWith(transaction) || transaction.equals(ALL)) {
                txCount++;
                String[] txStats = tx.split(",");
                if (txStats.length == headers.length) {
                    for (Map.Entry<Integer, DescriptiveStatistics> e : statistics.entrySet()) {
                        e.getValue().addValue(Double.valueOf(txStats[e.getKey()]));
                    }
                }
            }
        }

        reader.close();

        if (headers == null)
            return null;

        if (printSummary) {
            System.out.println("Transaction: " + transaction + " " + txCount);

            List<Integer> keys = new ArrayList<Integer>(statistics.keySet());
            Collections.sort(keys);

            for (Integer i : keys) {
                DescriptiveStatistics stats = statistics.get(i);
                if (stats.getMin() == 0 && stats.getMax() == 0) {
                    continue;
                }
                System.out.println(headers[i]);
                System.out.println("Min " + stats.getMin() + " Max " + stats.getMax() + " Avg " + stats.getMean()
                        + " Std " + stats.getStandardDeviation());
            }
        }

        Map<String, DescriptiveStatistics> annotatedStats = Maps.newHashMap();
        for (Map.Entry<Integer, DescriptiveStatistics> e : statistics.entrySet()) {
            annotatedStats.put(headers[e.getKey()].trim(), e.getValue());
        }
        return annotatedStats;
    }

}