com.github.benmanes.multiway.Profile.java Source code

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Here is the source code for com.github.benmanes.multiway.Profile.java

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/*
 * Copyright 2013 Ben Manes. All Rights Reserved.
 *
 * Licensed 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 com.github.benmanes.multiway;

import java.util.concurrent.Callable;
import java.util.concurrent.Executors;
import java.util.concurrent.TimeUnit;

import com.google.common.base.Stopwatch;
import com.twitter.jsr166e.LongAdder;

/**
 * A simple bootstrap for inspecting with an attached profiler.
 *
 * @author Ben Manes (ben.manes@gmail.com)
 */
public final class Profile {
    static final int DISPLAY_DELAY_SEC = 5;

    public static void main(String[] args) throws Exception {
        final MultiwayPool<Integer, Integer> multiway = MultiwayPoolBuilder.newBuilder()
                //.expireAfterAccess(2, TimeUnit.MINUTES)
                .maximumSize(100).build();
        final Callable<Integer> resourceLoader = new Callable<Integer>() {
            @Override
            public Integer call() throws Exception {
                return Integer.MAX_VALUE;
            }
        };

        final LongAdder calls = new LongAdder();
        Executors.newSingleThreadScheduledExecutor().scheduleWithFixedDelay(new Runnable() {
            final Stopwatch stopwatch = new Stopwatch().start();

            @Override
            public void run() {
                long count = calls.longValue();
                long rate = count / stopwatch.elapsed(TimeUnit.SECONDS);
                System.out.printf("%s - %,d [%,d / sec]\n", stopwatch, count, rate);
            }
        }, DISPLAY_DELAY_SEC, DISPLAY_DELAY_SEC, TimeUnit.SECONDS);
        ConcurrentTestHarness.timeTasks(25, new Runnable() {
            @Override
            public void run() {
                Integer id = 1;
                for (;;) {
                    Integer resource = multiway.borrow(id, resourceLoader, 100, TimeUnit.MICROSECONDS);
                    multiway.release(resource, 100, TimeUnit.MICROSECONDS);
                    calls.increment();
                }
            }
        });
    }
}