| // 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.collect.ImmutableList; |
| import com.google.common.collect.Iterables; |
| import com.google.devtools.build.lib.concurrent.ThreadSafety; |
| import java.util.ArrayList; |
| import java.util.HashMap; |
| import java.util.List; |
| import java.util.Map; |
| |
| /** |
| * A simple Differencer which just records the invalidated values it's been given. |
| */ |
| @ThreadSafety.ThreadCompatible |
| public class RecordingDifferencer implements Differencer, Injectable { |
| |
| private List<SkyKey> valuesToInvalidate; |
| private Map<SkyKey, SkyValue> valuesToInject; |
| |
| public RecordingDifferencer() { |
| clear(); |
| } |
| |
| private void clear() { |
| valuesToInvalidate = new ArrayList<>(); |
| valuesToInject = new HashMap<>(); |
| } |
| |
| @Override |
| public Diff getDiff(WalkableGraph fromGraph, Version fromVersion, Version toVersion) { |
| Diff diff = new ImmutableDiff(valuesToInvalidate, valuesToInject); |
| clear(); |
| return diff; |
| } |
| |
| /** |
| * Store the given values for invalidation. |
| */ |
| public void invalidate(Iterable<SkyKey> values) { |
| Iterables.addAll(valuesToInvalidate, values); |
| } |
| |
| /** |
| * Invalidates the cached values of any values in error transiently. |
| * |
| * <p>If a future call to {@link MemoizingEvaluator#evaluate} requests a value that transitively |
| * depends on any value that was in an error state (or is one of these), they will be re-computed. |
| */ |
| public void invalidateTransientErrors() { |
| // All transient error values have a dependency on the single global ERROR_TRANSIENCE value, |
| // so we only have to invalidate that one value to catch everything. |
| invalidate(ImmutableList.of(ErrorTransienceValue.KEY)); |
| } |
| |
| /** |
| * Store the given values for injection. |
| */ |
| @Override |
| public void inject(Map<SkyKey, ? extends SkyValue> values) { |
| valuesToInject.putAll(values); |
| } |
| |
| @Override |
| public void inject(SkyKey key, SkyValue value) { |
| valuesToInject.put(key, value); |
| } |
| } |