| /* |
| * Copyright (C) 2014 The Guava Authors |
| * |
| * 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.google.common.util.concurrent; |
| |
| import static com.google.common.util.concurrent.MoreExecutors.directExecutor; |
| |
| import com.google.caliper.BeforeExperiment; |
| import com.google.caliper.Param; |
| import com.google.caliper.api.Footprint; |
| import com.google.caliper.api.SkipThisScenarioException; |
| import com.google.common.util.concurrent.AbstractFutureBenchmarks.Facade; |
| import com.google.common.util.concurrent.AbstractFutureBenchmarks.Impl; |
| import java.util.HashSet; |
| import java.util.Set; |
| import java.util.concurrent.Executor; |
| |
| /** Measures the size of AbstractFuture implementations. */ |
| public class AbstractFutureFootprintBenchmark { |
| |
| enum State { |
| NOT_DONE, |
| FINISHED, |
| CANCELLED, |
| FAILED |
| } |
| |
| @Param State state; |
| @Param Impl impl; |
| |
| @Param({"0", "1", "5", "10"}) |
| int numListeners; |
| |
| @Param({"0", "1", "5", "10"}) |
| int numThreads; |
| |
| private final Set<Thread> blockedThreads = new HashSet<>(); |
| |
| @BeforeExperiment |
| void setUp() throws Exception { |
| if (state != State.NOT_DONE && (numListeners != 0 || numThreads != 0)) { |
| throw new SkipThisScenarioException(); |
| } |
| } |
| |
| // This exclusion doesn't exclude the TOMBSTONE objects we set. So 'done' NEW futures will look |
| // larger than they are. |
| @SuppressWarnings("FutureReturnValueIgnored") |
| @Footprint(exclude = {Runnable.class, Executor.class, Thread.class, Exception.class}) |
| public Object measureSize() { |
| for (Thread thread : blockedThreads) { |
| thread.interrupt(); |
| } |
| blockedThreads.clear(); |
| final Facade<Object> f = impl.newFacade(); |
| for (int i = 0; i < numThreads; i++) { |
| Thread thread = |
| new Thread() { |
| @Override |
| public void run() { |
| try { |
| f.get(); |
| } catch (Throwable expected) { |
| } |
| } |
| }; |
| thread.start(); |
| blockedThreads.add(thread); |
| } |
| for (int i = 0; i < numListeners; i++) { |
| f.addListener(Runnables.doNothing(), directExecutor()); |
| } |
| for (Thread thread : blockedThreads) { |
| AbstractFutureBenchmarks.awaitWaiting(thread); |
| } |
| switch (state) { |
| case NOT_DONE: |
| break; |
| case FINISHED: |
| f.set(null); |
| break; |
| case CANCELLED: |
| f.cancel(false); |
| break; |
| case FAILED: |
| f.setException(new Exception()); |
| break; |
| default: |
| throw new AssertionError(); |
| } |
| return f; |
| } |
| } |