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// Copyright 2016 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.collect.Interner;
import com.google.devtools.build.lib.concurrent.BlazeInterners;
import com.google.devtools.build.lib.skyframe.serialization.autocodec.AutoCodec;
import com.google.devtools.build.skyframe.AbstractSkyKey;
import com.google.devtools.build.skyframe.SkyFunction;
import com.google.devtools.build.skyframe.SkyFunctionName;
import com.google.devtools.build.skyframe.SkyKey;
import com.google.devtools.build.skyframe.SkyValue;
import java.util.Map;
import java.util.concurrent.atomic.AtomicReference;
import javax.annotation.Nullable;
/** The Skyframe function that generates values for variables of the client environment. */
public final class ClientEnvironmentFunction implements SkyFunction {
public static Key key(String keyString) {
return ClientEnvironmentFunction.Key.create(keyString);
}
/** The Skyframe key for the client environment function. */
@AutoCodec.VisibleForSerialization
@AutoCodec
static class Key extends AbstractSkyKey<String> {
private static final Interner<Key> interner = BlazeInterners.newWeakInterner();
private Key(String arg) {
super(arg);
}
@AutoCodec.VisibleForSerialization
@AutoCodec.Instantiator
static Key create(String arg) {
return interner.intern(new Key(arg));
}
@Override
public SkyFunctionName functionName() {
return SkyFunctions.CLIENT_ENVIRONMENT_VARIABLE;
}
}
private final AtomicReference<Map<String, String>> clientEnv;
public ClientEnvironmentFunction(AtomicReference<Map<String, String>> clientEnv) {
this.clientEnv = clientEnv;
}
@Nullable
@Override
public SkyValue compute(SkyKey key, Environment env) {
return new ClientEnvironmentValue(clientEnv.get().get((String) key.argument()));
}
}