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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.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));
}
}
}
}
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