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// Copyright 2014 Google Inc. 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.annotations.VisibleForTesting;
import com.google.common.base.Preconditions;
import com.google.common.collect.ImmutableList;
import com.google.common.collect.Iterables;
import com.google.devtools.build.lib.actions.Action;
import com.google.devtools.build.lib.analysis.ConfiguredTarget;
import com.google.devtools.build.lib.analysis.config.BuildConfiguration;
import com.google.devtools.build.lib.concurrent.ThreadSafety.Immutable;
import com.google.devtools.build.lib.concurrent.ThreadSafety.ThreadSafe;
import com.google.devtools.build.lib.syntax.Label;
import com.google.devtools.build.skyframe.SkyKey;
import javax.annotation.Nullable;
/**
* A configured target in the context of a Skyframe graph.
*/
@Immutable
@ThreadSafe
@VisibleForTesting
public final class ConfiguredTargetValue extends ActionLookupValue {
// These variables are only non-final because they may be clear()ed to save memory. They are null
// only after they are cleared.
@Nullable private ConfiguredTarget configuredTarget;
// We overload this variable to check whether the value has been clear()ed. We don't use a
// separate variable in order to save memory.
@Nullable private volatile Iterable<Action> actions;
ConfiguredTargetValue(ConfiguredTarget configuredTarget, Iterable<Action> actions) {
super(actions);
this.configuredTarget = configuredTarget;
this.actions = actions;
}
@VisibleForTesting
public ConfiguredTarget getConfiguredTarget() {
Preconditions.checkNotNull(actions, configuredTarget);
return configuredTarget;
}
@VisibleForTesting
public Iterable<Action> getActions() {
return Preconditions.checkNotNull(actions, configuredTarget);
}
/**
* Clears configured target data from this value, leaving only the artifact->generating action
* map.
*
* <p>Should only be used when user specifies --discard_analysis_cache. Must be called at most
* once per value, after which {@link #getConfiguredTarget} and {@link #getActions} cannot be
* called.
*/
public void clear() {
Preconditions.checkNotNull(actions, configuredTarget);
configuredTarget = null;
actions = null;
}
@VisibleForTesting
public static SkyKey key(Label label, BuildConfiguration configuration) {
return key(new ConfiguredTargetKey(label, configuration));
}
static ImmutableList<SkyKey> keys(Iterable<ConfiguredTargetKey> lacs) {
ImmutableList.Builder<SkyKey> keys = ImmutableList.builder();
for (ConfiguredTargetKey lac : lacs) {
keys.add(key(lac));
}
return keys.build();
}
/**
* Returns a label of ConfiguredTargetValue.
*/
@ThreadSafe
static Label extractLabel(SkyKey value) {
Object valueName = value.argument();
Preconditions.checkState(valueName instanceof ConfiguredTargetKey, valueName);
return ((ConfiguredTargetKey) valueName).getLabel();
}
@Override
public String toString() {
return "ConfiguredTargetValue: "
+ configuredTarget + ", actions: " + (actions == null ? null : Iterables.toString(actions));
}
}
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