| // 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.skyframe; |
| |
| import com.google.common.base.Preconditions; |
| import com.google.common.collect.ImmutableList; |
| import com.google.common.collect.Iterables; |
| import com.google.devtools.build.skyframe.SkyKey; |
| import com.google.errorprone.annotations.CanIgnoreReturnValue; |
| import java.util.ArrayList; |
| import java.util.Iterator; |
| import java.util.List; |
| import java.util.concurrent.atomic.AtomicReference; |
| |
| class CachedSkylarkImportLookupValueAndDeps { |
| private final SkylarkImportLookupValue value; |
| // We store the deps separately so that we can let go of the value when the cache drops it. |
| final CachedSkylarkImportLookupFunctionDeps deps; |
| |
| private CachedSkylarkImportLookupValueAndDeps( |
| SkylarkImportLookupValue value, CachedSkylarkImportLookupFunctionDeps deps) { |
| this.value = value; |
| this.deps = deps; |
| } |
| |
| SkylarkImportLookupValue getValue() { |
| return value; |
| } |
| |
| static CachedSkylarkImportLookupValueAndDeps.Builder newBuilder() { |
| return new CachedSkylarkImportLookupValueAndDeps.Builder(); |
| } |
| |
| static class Builder { |
| private final CachedSkylarkImportLookupFunctionDeps.Builder depsBuilder = |
| CachedSkylarkImportLookupFunctionDeps.newBuilder(); |
| private SkylarkImportLookupValue value; |
| |
| @CanIgnoreReturnValue |
| Builder addDep(SkyKey key) { |
| depsBuilder.addDep(key); |
| return this; |
| } |
| |
| @CanIgnoreReturnValue |
| Builder addDeps(Iterable<SkyKey> keys) { |
| depsBuilder.addDeps(keys); |
| return this; |
| } |
| |
| @CanIgnoreReturnValue |
| Builder noteException(Exception e) { |
| depsBuilder.noteException(e); |
| return this; |
| } |
| |
| @CanIgnoreReturnValue |
| Builder addTransitiveDeps(CachedSkylarkImportLookupValueAndDeps transitiveDeps) { |
| depsBuilder.addTransitiveDeps(transitiveDeps.deps); |
| return this; |
| } |
| |
| @CanIgnoreReturnValue |
| Builder setValue(SkylarkImportLookupValue value) { |
| this.value = value; |
| return this; |
| } |
| |
| CachedSkylarkImportLookupValueAndDeps build() { |
| return new CachedSkylarkImportLookupValueAndDeps(value, depsBuilder.build()); |
| } |
| } |
| |
| static class CachedSkylarkImportLookupFunctionDeps implements Iterable<Iterable<SkyKey>> { |
| private final ImmutableList<Iterable<SkyKey>> deps; |
| |
| private CachedSkylarkImportLookupFunctionDeps(ImmutableList<Iterable<SkyKey>> deps) { |
| this.deps = deps; |
| } |
| |
| static CachedSkylarkImportLookupFunctionDeps.Builder newBuilder() { |
| return new CachedSkylarkImportLookupFunctionDeps.Builder(); |
| } |
| |
| @Override |
| public Iterator<Iterable<SkyKey>> iterator() { |
| return deps.iterator(); |
| } |
| |
| static class Builder { |
| private final List<Iterable<SkyKey>> deps = new ArrayList<>(); |
| private final AtomicReference<Exception> exceptionSeen = new AtomicReference<>(null); |
| |
| // We only add the ASTFileLookupFunction through this so we don't need to worry about memory |
| // optimizations by adding it raw. |
| @CanIgnoreReturnValue |
| Builder addDep(SkyKey key) { |
| deps.add(ImmutableList.of(key)); |
| return this; |
| } |
| |
| @CanIgnoreReturnValue |
| Builder addDeps(Iterable<SkyKey> keys) { |
| deps.add(keys); |
| return this; |
| } |
| |
| @CanIgnoreReturnValue |
| Builder noteException(Exception e) { |
| exceptionSeen.set(e); |
| return this; |
| } |
| |
| @CanIgnoreReturnValue |
| Builder addTransitiveDeps(CachedSkylarkImportLookupFunctionDeps transitiveDeps) { |
| Iterables.addAll(deps, transitiveDeps); |
| return this; |
| } |
| |
| CachedSkylarkImportLookupFunctionDeps build() { |
| // We expect that we don't handle any exceptions in SkylarkLookupImportFunction directly. |
| Preconditions.checkState( |
| exceptionSeen.get() == null, |
| "Caching a value in error?: %s %s", |
| deps, |
| exceptionSeen.get()); |
| return new CachedSkylarkImportLookupFunctionDeps(ImmutableList.copyOf(deps)); |
| } |
| } |
| } |
| } |