| // Copyright 2014 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.testutil; |
| |
| import com.google.common.base.Preconditions; |
| import com.google.common.flogger.GoogleLogger; |
| import java.util.concurrent.atomic.AtomicReference; |
| import javax.annotation.Nullable; |
| |
| /** |
| * A class that wraps Runnables and records the first Throwable thrown by the wrapped Runnables when |
| * they are run. Only for use in testing. |
| */ |
| public class ThrowableRecordingRunnableWrapper { |
| private final String name; |
| private final AtomicReference<Throwable> errorRef = new AtomicReference<>(); |
| |
| private static final GoogleLogger logger = GoogleLogger.forEnclosingClass(); |
| |
| public ThrowableRecordingRunnableWrapper(String name) { |
| this.name = Preconditions.checkNotNull(name); |
| } |
| |
| @Nullable |
| public Throwable getFirstThrownError() { |
| return errorRef.get(); |
| } |
| |
| public Runnable wrap(final Runnable runnable) { |
| return () -> { |
| try { |
| runnable.run(); |
| } catch (Throwable error) { |
| errorRef.compareAndSet(null, error); |
| logger.atSevere().withCause(error).log("Error thrown by runnable in %s", name); |
| } |
| }; |
| } |
| } |