| // Copyright 2016 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.query2; |
| |
| import com.google.common.base.Preconditions; |
| import com.google.common.collect.ImmutableList; |
| import com.google.common.collect.ImmutableSet; |
| import com.google.common.collect.Iterables; |
| import com.google.common.collect.Multimap; |
| import com.google.devtools.build.lib.query2.engine.Callback; |
| import com.google.devtools.build.lib.query2.engine.QueryException; |
| import com.google.devtools.build.lib.query2.engine.QueryUtil.AggregateAllCallback; |
| import com.google.devtools.build.lib.query2.engine.Uniquifier; |
| import com.google.devtools.build.skyframe.SkyKey; |
| |
| /** |
| * Helper class that computes the TTV-only DTC of some given TTV keys, via BFS following all |
| * TTV->TTV dep edges. |
| */ |
| class TransitiveTraversalValueDTCVisitor extends ParallelVisitor<SkyKey, SkyKey> { |
| private final SkyQueryEnvironment env; |
| private final Uniquifier<SkyKey> uniquifier; |
| |
| private TransitiveTraversalValueDTCVisitor( |
| SkyQueryEnvironment env, |
| Uniquifier<SkyKey> uniquifier, |
| int processResultsBatchSize, |
| AggregateAllCallback<SkyKey, ImmutableSet<SkyKey>> aggregateAllCallback) { |
| super(aggregateAllCallback, ParallelSkyQueryUtils.VISIT_BATCH_SIZE, processResultsBatchSize); |
| this.env = env; |
| this.uniquifier = uniquifier; |
| } |
| |
| static class Factory implements ParallelVisitor.Factory { |
| private final SkyQueryEnvironment env; |
| private final Uniquifier<SkyKey> uniquifier; |
| private final AggregateAllCallback<SkyKey, ImmutableSet<SkyKey>> aggregateAllCallback; |
| private final int processResultsBatchSize; |
| |
| Factory( |
| SkyQueryEnvironment env, |
| Uniquifier<SkyKey> uniquifier, |
| int processResultsBatchSize, |
| AggregateAllCallback<SkyKey, ImmutableSet<SkyKey>> aggregateAllCallback) { |
| this.env = env; |
| this.uniquifier = uniquifier; |
| this.processResultsBatchSize = processResultsBatchSize; |
| this.aggregateAllCallback = aggregateAllCallback; |
| } |
| |
| @Override |
| public ParallelVisitor<SkyKey, SkyKey> create() { |
| return new TransitiveTraversalValueDTCVisitor( |
| env, uniquifier, processResultsBatchSize, aggregateAllCallback); |
| } |
| } |
| |
| @Override |
| protected void processPartialResults( |
| Iterable<SkyKey> keysToUseForResult, Callback<SkyKey> callback) |
| throws QueryException, InterruptedException { |
| callback.process(keysToUseForResult); |
| } |
| |
| @Override |
| protected Visit getVisitResult(Iterable<SkyKey> ttvKeys) throws InterruptedException { |
| Multimap<SkyKey, SkyKey> deps = env.getDirectDepsOfSkyKeys(ttvKeys); |
| return new Visit( |
| /*keysToUseForResult=*/ deps.keySet(), |
| /*keysToVisit=*/ deps.values() |
| .stream() |
| .filter(SkyQueryEnvironment.IS_TTV) |
| .collect(ImmutableList.toImmutableList())); |
| } |
| |
| @Override |
| protected Iterable<SkyKey> preprocessInitialVisit(Iterable<SkyKey> keys) { |
| // ParallelVisitorCallback passes in TTV keys. |
| Preconditions.checkState(Iterables.all(keys, SkyQueryEnvironment.IS_TTV), keys); |
| return keys; |
| } |
| |
| @Override |
| protected ImmutableList<SkyKey> getUniqueValues(Iterable<SkyKey> values) { |
| return uniquifier.unique(values); |
| } |
| } |