blob: 08ec150332c0e66cd7a27b837b1506626eb5f3f7 [file] [log] [blame]
// Copyright 2022 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.exec;
import static com.google.common.collect.ImmutableList.toImmutableList;
import com.google.common.collect.ImmutableList;
import com.google.common.collect.ImmutableMap;
import com.google.common.collect.ImmutableSet;
import com.google.devtools.build.lib.runtime.proto.MnemonicPolicy;
import com.google.devtools.build.lib.runtime.proto.StrategiesForMnemonic;
import java.util.List;
/** Policy for filtering spawn strategies. */
public interface SpawnStrategyPolicy {
/** Returns result of applying policy to per-mnemonic strategies. */
ImmutableList<String> apply(String mnemonic, List<String> strategies);
/** Returns result of applying default policy to strategies. */
ImmutableList<String> apply(List<String> strategies);
/** Creates new policy from proto descriptor. Empty proto policy implies everything allowed. */
static SpawnStrategyPolicy create(MnemonicPolicy policy) {
if (MnemonicPolicy.getDefaultInstance().equals(policy)) {
return new AllowAllStrategiesPolicy();
}
ImmutableMap.Builder<String, ImmutableSet<String>> perMnemonicAllowList =
ImmutableMap.builder();
for (StrategiesForMnemonic strategiesForMnemonic : policy.getStrategyAllowlistList()) {
perMnemonicAllowList.put(
strategiesForMnemonic.getMnemonic(),
ImmutableSet.copyOf(strategiesForMnemonic.getStrategyList()));
}
return new SpawnStrategyPolicyImpl(
perMnemonicAllowList.buildKeepingLast(),
ImmutableSet.copyOf(policy.getDefaultAllowlistList()));
}
/** Allows all strategies - effectively a no-op strategy. */
class AllowAllStrategiesPolicy implements SpawnStrategyPolicy {
private AllowAllStrategiesPolicy() {}
@Override
public ImmutableList<String> apply(String mnemonic, List<String> strategies) {
return ImmutableList.copyOf(strategies);
}
@Override
public ImmutableList<String> apply(List<String> strategies) {
return ImmutableList.copyOf(strategies);
}
}
/** Enforces a real strategy policy based on provided config. */
class SpawnStrategyPolicyImpl implements SpawnStrategyPolicy {
private final ImmutableMap<String, ImmutableSet<String>> perMnemonicAllowList;
private final ImmutableSet<String> defaultAllowList;
private SpawnStrategyPolicyImpl(
ImmutableMap<String, ImmutableSet<String>> perMnemonicAllowList,
ImmutableSet<String> defaultAllowList) {
this.perMnemonicAllowList = perMnemonicAllowList;
this.defaultAllowList = defaultAllowList;
}
@Override
public ImmutableList<String> apply(String mnemonic, List<String> strategies) {
ImmutableSet<String> allowList =
perMnemonicAllowList.getOrDefault(mnemonic, defaultAllowList);
return strategies.stream().filter(allowList::contains).collect(toImmutableList());
}
@Override
public ImmutableList<String> apply(List<String> strategies) {
return strategies.stream().filter(defaultAllowList::contains).collect(toImmutableList());
}
}
}