| /** |
| * Licensed to the Apache Software Foundation (ASF) under one or more |
| * contributor license agreements. See the NOTICE file distributed with |
| * this work for additional information regarding copyright ownership. |
| * The ASF 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 org.apache.camel.itest.jmh; |
| |
| import java.util.concurrent.TimeUnit; |
| |
| import org.apache.camel.impl.DefaultUuidGenerator; |
| import org.junit.Test; |
| import org.openjdk.jmh.annotations.Benchmark; |
| import org.openjdk.jmh.annotations.Level; |
| import org.openjdk.jmh.annotations.Measurement; |
| import org.openjdk.jmh.annotations.Mode; |
| import org.openjdk.jmh.annotations.Scope; |
| import org.openjdk.jmh.annotations.Setup; |
| import org.openjdk.jmh.annotations.State; |
| import org.openjdk.jmh.infra.Blackhole; |
| import org.openjdk.jmh.runner.Runner; |
| import org.openjdk.jmh.runner.options.Options; |
| import org.openjdk.jmh.runner.options.OptionsBuilder; |
| import org.openjdk.jmh.runner.options.TimeValue; |
| |
| /** |
| * Tests the {@link DefaultUuidGenerator}. |
| * <p/> |
| * Thanks to this SO answer: https://stackoverflow.com/questions/30485856/how-to-run-jmh-from-inside-junit-tests |
| */ |
| public class DefaultUuidGeneratorTest { |
| |
| @Test |
| public void launchBenchmark() throws Exception { |
| Options opt = new OptionsBuilder() |
| // Specify which benchmarks to run. |
| // You can be more specific if you'd like to run only one benchmark per test. |
| .include(this.getClass().getName() + ".*") |
| // Set the following options as needed |
| .mode(Mode.All) |
| .timeUnit(TimeUnit.MICROSECONDS) |
| .warmupTime(TimeValue.seconds(1)) |
| .warmupIterations(2) |
| .measurementTime(TimeValue.seconds(1)) |
| .measurementIterations(2) |
| .threads(2) |
| .forks(1) |
| .shouldFailOnError(true) |
| .shouldDoGC(true) |
| .build(); |
| |
| new Runner(opt).run(); |
| } |
| |
| // The JMH samples are the best documentation for how to use it |
| // http://hg.openjdk.java.net/code-tools/jmh/file/tip/jmh-samples/src/main/java/org/openjdk/jmh/samples/ |
| @State(Scope.Thread) |
| public static class BenchmarkState { |
| DefaultUuidGenerator uuid; |
| |
| @Setup(Level.Trial) |
| public void initialize() { |
| uuid = new DefaultUuidGenerator(); |
| } |
| } |
| |
| @Benchmark |
| @Measurement(batchSize = 1000000) |
| public void benchmark(BenchmarkState state, Blackhole bh) { |
| String id = state.uuid.generateUuid(); |
| bh.consume(id); |
| } |
| |
| } |