| // Copyright 2022 The Bazel Authors. 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.google.devtools.build.lib.runtime; |
| |
| import static com.google.common.base.Preconditions.checkNotNull; |
| import static com.google.common.base.Preconditions.checkState; |
| import static java.util.concurrent.TimeUnit.SECONDS; |
| |
| import com.google.common.util.concurrent.ThreadFactoryBuilder; |
| import com.google.devtools.build.lib.util.AbruptExitException; |
| import java.util.concurrent.ExecutorService; |
| import java.util.concurrent.Executors; |
| import javax.annotation.Nullable; |
| |
| /** A {@link BlazeModule} that waits for submitted tasks to terminate after every command. */ |
| public class BlockWaitingModule extends BlazeModule { |
| @Nullable private ExecutorService executorService; |
| |
| @Override |
| public void beforeCommand(CommandEnvironment env) throws AbruptExitException { |
| checkState(executorService == null, "executorService must be null"); |
| |
| executorService = |
| Executors.newCachedThreadPool( |
| new ThreadFactoryBuilder().setNameFormat("block-waiting-%d").build()); |
| } |
| |
| @SuppressWarnings("FutureReturnValueIgnored") |
| public void submit(Runnable task) { |
| checkNotNull(executorService, "executorService must not be null"); |
| |
| executorService.submit(task); |
| } |
| |
| @Override |
| public void afterCommand() throws AbruptExitException { |
| checkNotNull(executorService, "executorService must not be null"); |
| |
| executorService.shutdown(); |
| try { |
| executorService.awaitTermination(Long.MAX_VALUE, SECONDS); |
| } catch (InterruptedException e) { |
| executorService.shutdownNow(); |
| Thread.currentThread().interrupt(); |
| } |
| |
| executorService = null; |
| } |
| } |