| // 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.skyframe; |
| |
| import com.google.common.base.Preconditions; |
| import com.google.devtools.build.lib.concurrent.AbstractQueueVisitor; |
| import com.google.devtools.common.options.OptionsProvider; |
| import javax.annotation.Nullable; |
| |
| /** |
| * A driver for auto-updating graphs which operate over monotonically increasing integer versions. |
| */ |
| public class SequentialBuildDriver implements BuildDriver { |
| private final MemoizingEvaluator memoizingEvaluator; |
| private IntVersion curVersion; |
| |
| public SequentialBuildDriver(MemoizingEvaluator evaluator) { |
| this.memoizingEvaluator = Preconditions.checkNotNull(evaluator); |
| this.curVersion = IntVersion.of(0); |
| } |
| |
| @Override |
| public <T extends SkyValue> EvaluationResult<T> evaluate( |
| Iterable<? extends SkyKey> roots, EvaluationContext evaluationContext) |
| throws InterruptedException { |
| try { |
| return memoizingEvaluator.evaluate( |
| roots, |
| curVersion, |
| evaluationContext.getExecutorServiceSupplier().isPresent() |
| ? evaluationContext |
| : EvaluationContext.newBuilder() |
| .copyFrom(evaluationContext) |
| .setNumThreads(evaluationContext.getParallelism()) |
| .setExecutorServiceSupplier( |
| () -> |
| AbstractQueueVisitor.createExecutorService( |
| evaluationContext.getParallelism(), |
| "skyframe-evaluator", |
| evaluationContext.getUseForkJoinPool())) |
| .build()); |
| } finally { |
| curVersion = curVersion.next(); |
| } |
| } |
| |
| @Override |
| public String meta(Iterable<SkyKey> of, OptionsProvider options) { |
| return ""; |
| } |
| |
| @Override |
| public MemoizingEvaluator getGraphForTesting() { |
| return memoizingEvaluator; |
| } |
| |
| @Nullable |
| @Override |
| public SkyValue getExistingValueForTesting(SkyKey key) throws InterruptedException { |
| return memoizingEvaluator.getExistingValue(key); |
| } |
| |
| @Nullable |
| @Override |
| public ErrorInfo getExistingErrorForTesting(SkyKey key) throws InterruptedException { |
| return memoizingEvaluator.getExistingErrorForTesting(key); |
| } |
| |
| @Nullable |
| @Override |
| public NodeEntry getEntryForTesting(SkyKey key) throws InterruptedException { |
| return memoizingEvaluator.getExistingEntryAtCurrentlyEvaluatingVersion(key); |
| } |
| } |