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// 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.Function;
import com.google.devtools.build.lib.concurrent.AbstractQueueVisitor;
import com.google.devtools.build.lib.concurrent.AbstractQueueVisitor.ThreadPoolExecutorParams;
import com.google.devtools.build.skyframe.InvalidatingNodeVisitor.DeletingNodeVisitor;
import com.google.devtools.build.skyframe.InvalidatingNodeVisitor.DirtyingNodeVisitor;
import com.google.devtools.build.skyframe.InvalidatingNodeVisitor.InvalidationState;
import java.util.concurrent.ThreadPoolExecutor;
import javax.annotation.Nullable;
/**
* Utility class for performing eager invalidation on Skyframe graphs.
*
* <p>This is intended only for use in alternative {@code MemoizingEvaluator} implementations.
*/
public final class EagerInvalidator {
private EagerInvalidator() {}
/**
* Deletes given values. The {@code traverseGraph} parameter controls whether this method deletes
* (transitive) dependents of these nodes and relevant graph edges, or just the nodes themselves.
* Deleting just the nodes is inconsistent unless the graph will not be used for incremental
* builds in the future, but unfortunately there is a case where we delete nodes intra-build. As
* long as the full upward transitive closure of the nodes is specified for deletion, the graph
* remains consistent.
*/
public static void delete(DirtiableGraph graph, Iterable<SkyKey> diff,
EvaluationProgressReceiver invalidationReceiver, InvalidationState state,
boolean traverseGraph, DirtyKeyTracker dirtyKeyTracker) throws InterruptedException {
DeletingNodeVisitor visitor =
createDeletingVisitorIfNeeded(
graph, diff, invalidationReceiver, state, traverseGraph, dirtyKeyTracker);
if (visitor != null) {
visitor.run();
}
}
@Nullable
static DeletingNodeVisitor createDeletingVisitorIfNeeded(
DirtiableGraph graph,
Iterable<SkyKey> diff,
EvaluationProgressReceiver invalidationReceiver,
InvalidationState state,
boolean traverseGraph,
DirtyKeyTracker dirtyKeyTracker) {
state.update(diff);
return state.isEmpty() ? null
: new DeletingNodeVisitor(graph, invalidationReceiver, state, traverseGraph,
dirtyKeyTracker);
}
@Nullable
static DirtyingNodeVisitor createInvalidatingVisitorIfNeeded(
ThinNodeQueryableGraph graph,
Iterable<SkyKey> diff,
EvaluationProgressReceiver invalidationReceiver,
InvalidationState state,
DirtyKeyTracker dirtyKeyTracker,
Function<ThreadPoolExecutorParams, ThreadPoolExecutor> executorFactory) {
state.update(diff);
return state.isEmpty() ? null
: new DirtyingNodeVisitor(graph, invalidationReceiver, state, dirtyKeyTracker,
executorFactory);
}
@Nullable
static DirtyingNodeVisitor createInvalidatingVisitorIfNeeded(
DirtiableGraph graph,
Iterable<SkyKey> diff,
EvaluationProgressReceiver invalidationReceiver,
InvalidationState state,
DirtyKeyTracker dirtyKeyTracker) {
return createInvalidatingVisitorIfNeeded(graph, diff, invalidationReceiver, state,
dirtyKeyTracker, AbstractQueueVisitor.EXECUTOR_FACTORY);
}
/**
* Invalidates given values and their upward transitive closure in the graph, using an executor
* constructed with the provided factory, if necessary.
*/
public static void invalidate(
ThinNodeQueryableGraph graph,
Iterable<SkyKey> diff,
EvaluationProgressReceiver invalidationReceiver,
InvalidationState state,
DirtyKeyTracker dirtyKeyTracker,
Function<ThreadPoolExecutorParams, ThreadPoolExecutor> executorFactory)
throws InterruptedException {
// If we are invalidating, we must be in an incremental build by definition, so we must
// maintain a consistent graph state by traversing the graph and invalidating transitive
// dependencies. If edges aren't present, it would be impossible to check the dependencies of
// a dirty node in any case.
DirtyingNodeVisitor visitor =
createInvalidatingVisitorIfNeeded(
graph, diff, invalidationReceiver, state, dirtyKeyTracker, executorFactory);
if (visitor != null) {
visitor.run();
}
}
/**
* Invalidates given values and their upward transitive closure in the graph.
*/
public static void invalidate(DirtiableGraph graph, Iterable<SkyKey> diff,
EvaluationProgressReceiver invalidationReceiver, InvalidationState state,
DirtyKeyTracker dirtyKeyTracker)
throws InterruptedException {
invalidate(graph, diff, invalidationReceiver, state, dirtyKeyTracker,
AbstractQueueVisitor.EXECUTOR_FACTORY);
}
}
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