| // 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()); |
| } |
| } |
| } |