Example usage for org.apache.commons.math3.random ValueServer ValueServer

Introduction

In this page you can find the example usage for org.apache.commons.math3.random ValueServer ValueServer.

Prototype

public ValueServer() 

Source Link

Document

Creates new ValueServer

Usage

From source file:org.hawkular.metrics.generator.DataGenerator.java

public void run(CommandLine cmdLine) throws Exception {
    Stopwatch stopwatch = Stopwatch.createStarted();

    if (cmdLine.hasOption("h")) {
        printUsage();//from  w ww.  j  av a2s. c  o m
        return;
    }

    keyspace = cmdLine.getOptionValue("keyspace", "hawkular_metrics");
    dataDir = new File(cmdLine.getOptionValue("data-dir", "./data"));
    dataDir.mkdirs();
    tenants = Integer.parseInt(cmdLine.getOptionValue("tenants", "100"));
    metricsPerTenant = Integer.parseInt(cmdLine.getOptionValue("metrics-per-tenant", "100"));

    ValueServer valueServer = new ValueServer();
    valueServer.setMu(100);
    valueServer.setMode(ValueServer.UNIFORM_MODE);

    String endValue = cmdLine.getOptionValue("end");
    if (endValue == null) {
        endTime = System.currentTimeMillis();
    } else {
        endTime = getDuration("end", endValue, startEndRegexp);
    }

    String startValue = cmdLine.getOptionValue("start");
    if (startValue == null) {
        startTime = endTime - TimeUnit.MILLISECONDS.convert(1, TimeUnit.HOURS);
    } else {
        startTime = endTime - getDuration("start", startValue, startEndRegexp);
    }

    String intervalValue = cmdLine.getOptionValue("interval");
    if (intervalValue == null) {
        interval = TimeUnit.MILLISECONDS.convert(1, TimeUnit.MINUTES);
    } else {
        interval = getDuration("interval", intervalValue, intervalRegexp);
    }

    bufferSize = Integer.parseInt(cmdLine.getOptionValue("buffer-size", "128"));

    CQLSSTableWriter writer = createWriter();
    long totalDataPoints = 0;

    long currentTime = startTime;
    while (currentTime <= endTime) {
        for (int i = 0; i < tenants; ++i) {
            for (int j = 0; j < metricsPerTenant; ++j) {
                UUID timeUUID = TimeUUIDUtils.getTimeUUID(currentTime);
                writer.addRow("TENANT-" + i, GAUGE.getCode(), "GAUGE-" + j, 0L, timeUUID,
                        valueServer.getNext());
                ++totalDataPoints;
            }
        }
        currentTime += interval;
    }

    writer.close();
    stopwatch.stop();

    System.out.println("\n\nStart time: " + startTime);
    System.out.println("End time: " + endTime);
    System.out.println("Total duration: " + (endTime - startTime) + " ms");
    System.out.println("Interval: " + interval);
    System.out.println("Tenants: " + tenants);
    System.out.println("Metrics per tenant: " + metricsPerTenant);
    System.out.println("Total data points: " + totalDataPoints);
    System.out.println("Execution time: " + stopwatch.elapsed(TimeUnit.MILLISECONDS) + " ms");
}

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