/*
* Copyright 2015 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.caffeine.jcache;
import static java.util.Objects.requireNonNull;
import java.util.Random;
import java.util.concurrent.Executors;
import java.util.concurrent.ForkJoinPool;
import java.util.concurrent.TimeUnit;
import java.util.concurrent.atomic.LongAdder;
import javax.cache.Cache;
import javax.cache.CacheManager;
import javax.cache.Caching;
import javax.cache.configuration.MutableConfiguration;
import javax.cache.spi.CachingProvider;
import com.github.benmanes.caffeine.jcache.spi.CaffeineCachingProvider;
import com.google.common.base.Stopwatch;
/**
* A hook for profiling the JCache adapter.
*
* @author Ben Manes (ben.manes@gmail.com)
*/
public final class JCacheProfiler {
private static final int THREADS = 10;
private static final int KEYS = 10_000;
private static final boolean READ = true;
private final Cache<Integer, Boolean> cache;
private final LongAdder count;
private final Random random;
JCacheProfiler() {
random = new Random();
count = new LongAdder();
CachingProvider provider = Caching.getCachingProvider(CaffeineCachingProvider.class.getName());
CacheManager cacheManager = provider.getCacheManager(
provider.getDefaultURI(), provider.getDefaultClassLoader());
cache = cacheManager.createCache("profiler", new MutableConfiguration<>());
}
public void start() {
for (Integer i = 0; i < KEYS; i++) {
cache.put(i, Boolean.TRUE);
}
Runnable task = () -> {
for (int i = random.nextInt(); ; i++) {
Integer key = Math.abs(i % KEYS);
if (READ) {
requireNonNull(cache.get(key));
} else {
cache.put(key, Boolean.TRUE);
}
count.increment();
}
};
scheduleStatusTask();
for (int i = 0; i < THREADS; i++) {
ForkJoinPool.commonPool().execute(task);
}
}
@SuppressWarnings("FutureReturnValueIgnored")
private void scheduleStatusTask() {
Stopwatch stopwatch = Stopwatch.createStarted();
Executors.newSingleThreadScheduledExecutor().scheduleWithFixedDelay(() -> {
long count = this.count.longValue();
long rate = count / stopwatch.elapsed(TimeUnit.SECONDS);
System.out.printf("%s - %,d [%,d / sec]%n", stopwatch, count, rate);
}, 5, 5, TimeUnit.SECONDS);
}
public static void main(String[] args) {
new JCacheProfiler().start();
}
}