alvinalexander.com | career | drupal | java | mac | mysql | perl | scala | uml | unix  

Java example source code file (CaliperBench.java)

This example Java source code file (CaliperBench.java) is included in the alvinalexander.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" TM.

Learn more about this Java project at its project page.

Java - Java tags/keywords

caliperbench, calipermeasure, exception, internallogger, override, simplebenchmark, thread

The CaliperBench.java Java example source code

/*
 * Copyright 2012 The Netty Project
 *
 * The Netty Project 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.netty.test.udt.util;

import com.google.caliper.SimpleBenchmark;
import io.netty.util.internal.logging.InternalLogger;
import io.netty.util.internal.logging.InternalLoggerFactory;

/**
 * Base class for caliper/metrics benchmarks.
 */
public abstract class CaliperBench extends SimpleBenchmark {

    /**
     * Ensure no network latency after JVM shutdown
     */
    static {
        Runtime.getRuntime().addShutdownHook(new Thread() {
            @Override
            public void run() {
                try {
                    TrafficControl.delay(0);
                } catch (final Exception e) {
                    e.printStackTrace();
                }
            }
        });
    }

    protected final InternalLogger log = InternalLoggerFactory.getInstance(getClass());

    private volatile CaliperMeasure measure;

    /**
     * Caliper metrics wrapper.
     */
    protected CaliperMeasure measure() {
        return measure;
    }

    /**
     * Start measurement.
     */
    @Override
    protected void setUp() throws Exception {
        measure = new CaliperMeasure();
    }

    /**
     * Finish measurement.
     */
    @Override
    protected void tearDown() throws Exception {
        measure.shutdown();
    }

    /**
     * Measure time step and minimum run time.
     */
    protected long markStep() {
        return 3 * 1000;
    }

    /**
     * Measure progress while in sleep.
     */
    protected void markWait(final long time) throws Exception {

        final long timeStart = System.currentTimeMillis();

        while (true) {
            Thread.sleep(markStep());
            measure().mark();
            final long timeFinish = System.currentTimeMillis();
            if (timeFinish - timeStart >= time) {
                System.out.print("+\n");
                return;
            } else {
                System.out.print("-");
                continue;
            }
        }
    }

}

Other Java examples (source code examples)

Here is a short list of links related to this Java CaliperBench.java source code file:

... this post is sponsored by my books ...

#1 New Release!

FP Best Seller

 

new blog posts

 

Copyright 1998-2021 Alvin Alexander, alvinalexander.com
All Rights Reserved.

A percentage of advertising revenue from
pages under the /java/jwarehouse URI on this website is
paid back to open source projects.