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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.lib.skyframe;
import com.google.common.base.Preconditions;
import com.google.common.collect.ImmutableList;
import com.google.common.collect.Interner;
import com.google.devtools.build.lib.analysis.config.BuildConfiguration;
import com.google.devtools.build.lib.analysis.config.BuildConfiguration.Fragment;
import com.google.devtools.build.lib.analysis.config.BuildOptions;
import com.google.devtools.build.lib.concurrent.BlazeInterners;
import com.google.devtools.build.lib.concurrent.ThreadSafety.Immutable;
import com.google.devtools.build.lib.concurrent.ThreadSafety.ThreadSafe;
import com.google.devtools.build.lib.packages.RuleClassProvider;
import com.google.devtools.build.lib.skyframe.serialization.DeserializationContext;
import com.google.devtools.build.lib.skyframe.serialization.InjectingObjectCodec;
import com.google.devtools.build.lib.skyframe.serialization.ObjectCodec;
import com.google.devtools.build.lib.skyframe.serialization.SerializationContext;
import com.google.devtools.build.lib.skyframe.serialization.SerializationException;
import com.google.devtools.build.lib.skyframe.serialization.autocodec.AutoCodec;
import com.google.devtools.build.lib.skyframe.serialization.strings.StringCodecs;
import com.google.devtools.build.lib.util.Fingerprint;
import com.google.devtools.build.lib.vfs.FileSystemProvider;
import com.google.devtools.build.skyframe.SkyFunctionName;
import com.google.devtools.build.skyframe.SkyKey;
import com.google.devtools.build.skyframe.SkyValue;
import com.google.protobuf.CodedInputStream;
import com.google.protobuf.CodedOutputStream;
import java.io.IOException;
import java.util.Objects;
import javax.annotation.Nullable;
/** A Skyframe node representing a build configuration fragment. */
@Immutable
@ThreadSafe
@AutoCodec(dependency = FileSystemProvider.class)
public class ConfigurationFragmentValue implements SkyValue {
public static final InjectingObjectCodec<ConfigurationFragmentValue, FileSystemProvider> CODEC =
new ConfigurationFragmentValue_AutoCodec();
@Nullable
private final BuildConfiguration.Fragment fragment;
ConfigurationFragmentValue(BuildConfiguration.Fragment fragment) {
this.fragment = fragment;
}
public BuildConfiguration.Fragment getFragment() {
return fragment;
}
@ThreadSafe
public static ConfigurationFragmentKey key(
BuildOptions buildOptions,
Class<? extends Fragment> fragmentType,
RuleClassProvider ruleClassProvider) {
BuildOptions optionsKey =
buildOptions.trim(
BuildConfiguration.getOptionsClasses(
ImmutableList.<Class<? extends BuildConfiguration.Fragment>>of(fragmentType),
ruleClassProvider));
return ConfigurationFragmentKey.of(optionsKey, fragmentType);
}
/** {@link SkyKey} for {@link ConfigurationFragmentValue}. */
public static final class ConfigurationFragmentKey implements SkyKey {
private static Interner<ConfigurationFragmentKey> interner = BlazeInterners.newWeakInterner();
public static final ObjectCodec<ConfigurationFragmentKey> CODEC = new Codec();
private final BuildOptions buildOptions;
private final String checksum;
private final Class<? extends Fragment> fragmentType;
private ConfigurationFragmentKey(
BuildOptions buildOptions, Class<? extends Fragment> fragmentType) {
this.buildOptions = Preconditions.checkNotNull(buildOptions);
this.checksum = Fingerprint.md5Digest(buildOptions.computeCacheKey());
this.fragmentType = Preconditions.checkNotNull(fragmentType);
}
private static ConfigurationFragmentKey of(
BuildOptions buildOptions, Class<? extends Fragment> fragmentType) {
return interner.intern(new ConfigurationFragmentKey(buildOptions, fragmentType));
}
public BuildOptions getBuildOptions() {
return buildOptions;
}
public Class<? extends Fragment> getFragmentType() {
return fragmentType;
}
@Override
public boolean equals(Object o) {
if (this == o) {
return true;
}
if (!(o instanceof ConfigurationFragmentKey)) {
return false;
}
ConfigurationFragmentKey confObject = (ConfigurationFragmentKey) o;
return Objects.equals(fragmentType, confObject.fragmentType)
&& Objects.equals(buildOptions, confObject.buildOptions);
}
@Override
public int hashCode() {
return Objects.hash(buildOptions, fragmentType);
}
@Override
public String toString() {
return String.format("ConfigurationFragmentKey(class=%s, checksum=%s)",
fragmentType.getName(), checksum);
}
@Override
public SkyFunctionName functionName() {
return SkyFunctions.CONFIGURATION_FRAGMENT;
}
private static class Codec implements ObjectCodec<ConfigurationFragmentKey> {
@Override
public Class<ConfigurationFragmentKey> getEncodedClass() {
return ConfigurationFragmentKey.class;
}
@Override
public void serialize(
SerializationContext context, ConfigurationFragmentKey obj, CodedOutputStream codedOut)
throws SerializationException, IOException {
BuildOptions.CODEC.serialize(context, obj.buildOptions, codedOut);
StringCodecs.asciiOptimized().serialize(context, obj.fragmentType.getName(), codedOut);
}
@SuppressWarnings("unchecked") // Cast to Class<? extends Fragment>.
@Override
public ConfigurationFragmentKey deserialize(
DeserializationContext context, CodedInputStream codedIn)
throws SerializationException, IOException {
try {
return of(
BuildOptions.CODEC.deserialize(context, codedIn),
(Class<? extends Fragment>)
Class.forName(StringCodecs.asciiOptimized().deserialize(context, codedIn)));
} catch (ClassNotFoundException e) {
throw new SerializationException("Couldn't deserialize ConfigurationFragmentKey", e);
}
}
}
}
}
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