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

Introduction

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

Prototype

public RandomDataImpl() 

Source Link

Document

Construct a RandomDataImpl, using a default random generator as the source of randomness.

Usage

From source file:io.prometheus.client.examples.random.Main.java

public static void main(final String[] arguments) {
    Registry.defaultInitialize();
    final Server server = new Server(8181);
    final ServletContextHandler context = new ServletContextHandler();
    context.setContextPath("/");
    server.setHandler(context);/*from w w w .j  a v a  2  s  .c om*/
    context.addServlet(new ServletHolder(new MetricsServlet()), "/");

    new Thread() {
        @Override
        public void run() {
            final RandomDataImpl randomData = new RandomDataImpl();

            try {
                while (true) {
                    rpcLatency.add(ImmutableMap.of("service", "foo"), randomData.nextLong(0, 200));
                    rpcLatency.add(ImmutableMap.of("service", "bar"), (float) randomData.nextGaussian(100, 20));
                    rpcLatency.add(ImmutableMap.of("service", "zed"), (float) randomData.nextExponential(100));
                    rpcCalls.increment(ImmutableMap.of("service", "foo"));
                    rpcCalls.increment(ImmutableMap.of("service", "bar"));
                    rpcCalls.increment(ImmutableMap.of("service", "zed"));
                    Thread.sleep(1000);
                }
            } catch (final InterruptedException e) {
            }
        }
    }.start();

    try {
        server.start();
        server.join();
    } catch (Exception e) {
        e.printStackTrace();
    }
}

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