001    /*
002     * Licensed to the Apache Software Foundation (ASF) under one or more
003     * contributor license agreements.  See the NOTICE file distributed with
004     * this work for additional information regarding copyright ownership.
005     * The ASF licenses this file to You under the Apache License, Version 2.0
006     * (the "License"); you may not use this file except in compliance with
007     * the License.  You may obtain a copy of the License at
008     *
009     *      http://www.apache.org/licenses/LICENSE-2.0
010     *
011     * Unless required by applicable law or agreed to in writing, software
012     * distributed under the License is distributed on an "AS IS" BASIS,
013     * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
014     * See the License for the specific language governing permissions and
015     * limitations under the License.
016     */
017    package org.apache.commons.monitoring.counters;
018    
019    import org.apache.commons.monitoring.Role;
020    import org.apache.commons.monitoring.store.DefaultDataStore;
021    import org.junit.Test;
022    
023    import java.util.concurrent.ExecutorService;
024    import java.util.concurrent.Executors;
025    import java.util.concurrent.TimeUnit;
026    
027    import static org.junit.Assert.assertEquals;
028    
029    public class CounterBench implements Runnable {
030        private static final int THREADS = 30;
031        private static final int LOOPS = 20000000;
032    
033        private Counter counter;
034        private String mode;
035    
036        @Test
037        public void defaultCounter() throws Exception {
038            mode = "RentrantLockCounter";
039            counter = new DefaultCounter(new Counter.Key(Role.FAILURES, mode), new DefaultDataStore());
040            runConcurrent();
041        }
042    
043        private void runConcurrent() throws InterruptedException {
044            final long start = System.nanoTime();
045            final ExecutorService pool = Executors.newFixedThreadPool(THREADS);
046            for (int i = 0; i < LOOPS; i++) {
047                pool.submit(this);
048            }
049            pool.shutdown();
050            pool.awaitTermination(60, TimeUnit.SECONDS);
051    
052            final long duration = System.nanoTime() - start;
053            System.out.printf("%s : %,d ns/operation %n\n", mode, duration / LOOPS);
054            assertEquals(LOOPS, counter.getSum(), 0);
055    
056        }
057    
058        public void run() {
059            counter.add(1, Unit.UNARY);
060        }
061    }
062    
063