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// Copyright 2018 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.Iterables;
import com.google.common.collect.Multimap;
import com.google.devtools.build.lib.query2.engine.Callback;
import com.google.devtools.build.lib.query2.engine.Uniquifier;
import com.google.devtools.build.skyframe.SkyKey;
/**
* Helper class for visiting the TTV-only DTC of some given TTV keys, via BFS following all
* TTV->TTV dep edges. Disallowed edge filtering is *not* performed.
*/
public abstract class AbstractUnfilteredTTVDTCVisitor<T> extends AbstractSkyKeyParallelVisitor<T> {
protected final SkyQueryEnvironment env;
protected AbstractUnfilteredTTVDTCVisitor(
SkyQueryEnvironment env,
Uniquifier<SkyKey> uniquifier,
int visitBatchSize,
int processResultsBatchSize,
Callback<T> callback) {
super(uniquifier, callback, visitBatchSize, processResultsBatchSize);
this.env = env;
}
@Override
protected Visit getVisitResult(Iterable<SkyKey> ttvKeys) throws InterruptedException {
Multimap<SkyKey, SkyKey> deps = env.getUnfilteredDirectDepsOfSkyKeys(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;
}
}
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