| // 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.devtools.build.lib.concurrent.ParallelVisitor; |
| import com.google.devtools.build.lib.query2.ParallelVisitorUtils.ParallelQueryVisitor; |
| 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.Uniquifier; |
| import com.google.devtools.build.skyframe.SkyKey; |
| |
| /** |
| * A {@link ParallelVisitor} whose visitations occur on {@link SkyKey}s and those keys map directly |
| * to output keys. |
| */ |
| public abstract class AbstractSkyKeyParallelVisitor<T> |
| extends ParallelQueryVisitor<SkyKey, SkyKey, T> { |
| private final Uniquifier<SkyKey> uniquifier; |
| |
| protected AbstractSkyKeyParallelVisitor( |
| Uniquifier<SkyKey> visitationUniquifier, |
| Callback<T> callback, |
| int visitBatchSize, |
| int processResultsBatchSize, |
| VisitTaskStatusCallback visitTaskStatusCallback) { |
| super(callback, visitBatchSize, processResultsBatchSize, visitTaskStatusCallback); |
| this.uniquifier = visitationUniquifier; |
| } |
| |
| @Override |
| protected final Iterable<SkyKey> noteAndReturnUniqueVisitationKeys( |
| Iterable<SkyKey> prospectiveVisitationKeys) throws QueryException { |
| return uniquifier.unique(prospectiveVisitationKeys); |
| } |
| } |