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

Introduction

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

Prototype

int UNIFORM_MODE

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Document

Uniform random deviates with mean = μ.

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   www .  ja  va2s  .co  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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