1/* 2 * Copyright (C) 2013 Google Inc. 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17package com.google.caliper.runner; 18 19import static com.google.caliper.runner.Running.Benchmark; 20import static com.google.caliper.runner.Running.BenchmarkMethod; 21import static com.google.common.base.Preconditions.checkNotNull; 22 23import com.google.caliper.bridge.WorkerSpec; 24import com.google.caliper.util.Util; 25import com.google.common.collect.ImmutableList; 26import com.google.common.collect.ImmutableSortedMap; 27import dagger.Module; 28import dagger.Provides; 29 30import java.lang.reflect.Method; 31 32/** 33 * A module that binds data specific to a single experiment. 34 */ 35@Module 36public final class ExperimentModule { 37 private final ImmutableSortedMap<String, String> parameters; 38 private final Method benchmarkMethod; 39 40 private ExperimentModule( 41 Method benchmarkMethod, 42 ImmutableSortedMap<String, String> parameters) { 43 this.parameters = checkNotNull(parameters); 44 this.benchmarkMethod = checkNotNull(benchmarkMethod); 45 } 46 47 public static ExperimentModule forExperiment(Experiment experiment) { 48 Method benchmarkMethod = experiment.instrumentation().benchmarkMethod(); 49 return new ExperimentModule( 50 benchmarkMethod, 51 experiment.userParameters()); 52 } 53 54 public static ExperimentModule forWorkerSpec(WorkerSpec spec) 55 throws ClassNotFoundException { 56 Class<?> benchmarkClass = Util.loadClass(spec.benchmarkSpec.className()); 57 Method benchmarkMethod = findBenchmarkMethod(benchmarkClass, spec.benchmarkSpec.methodName(), 58 spec.methodParameterClasses); 59 benchmarkMethod.setAccessible(true); 60 return new ExperimentModule(benchmarkMethod, spec.benchmarkSpec.parameters()); 61 } 62 63 @Provides 64 @Benchmark 65 static Object provideRunningBenchmark(BenchmarkCreator creator) { 66 return creator.createBenchmarkInstance(); 67 } 68 69 @Provides 70 @BenchmarkMethod 71 String provideRunningBenchmarkMethodName() { 72 return benchmarkMethod.getName(); 73 } 74 75 @Provides 76 @BenchmarkMethod 77 Method provideRunningBenchmarkMethod() { 78 return benchmarkMethod; 79 } 80 81 @Provides 82 @Benchmark 83 ImmutableSortedMap<String, String> provideUserParameters() { 84 return parameters; 85 } 86 87 private static Method findBenchmarkMethod(Class<?> benchmark, String methodName, 88 ImmutableList<Class<?>> methodParameterClasses) { 89 Class<?>[] params = methodParameterClasses.toArray(new Class<?>[methodParameterClasses.size()]); 90 try { 91 return benchmark.getDeclaredMethod(methodName, params); 92 } catch (NoSuchMethodException e) { 93 throw new RuntimeException(e); 94 } catch (SecurityException e) { 95 // assertion error? 96 throw new RuntimeException(e); 97 } 98 } 99} 100