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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.actions;
import com.google.common.collect.ImmutableList;
import com.google.devtools.build.lib.actions.Executor.ActionContext;
import com.google.devtools.build.lib.util.Preconditions;
import java.util.ArrayList;
import java.util.List;
import javax.annotation.Nullable;
/**
* Builder class to create an {@link Executor} instance. This class is part of the module API,
* which allows modules to affect how the executor is initialized.
*/
public class ExecutorBuilder {
private final List<ActionContextProvider> actionContextProviders = new ArrayList<>();
private final List<ActionContextConsumer> actionContextConsumers = new ArrayList<>();
private ActionInputFileCache cache;
// These methods shouldn't be public, but they have to be right now as ExecutionTool is in another
// package.
public ImmutableList<ActionContextProvider> getActionContextProviders() {
return ImmutableList.copyOf(actionContextProviders);
}
public ImmutableList<ActionContextConsumer> getActionContextConsumers() {
return ImmutableList.copyOf(actionContextConsumers);
}
@Nullable
public ActionInputFileCache getActionInputFileCache() {
return cache;
}
/**
* Adds the specified action context providers to the executor.
*/
public ExecutorBuilder addActionContextProvider(ActionContextProvider provider) {
this.actionContextProviders.add(provider);
return this;
}
/**
* Adds the specified action context to the executor, by wrapping it in a simple action context
* provider implementation.
*/
public ExecutorBuilder addActionContext(ActionContext context) {
return addActionContextProvider(new SimpleActionContextProvider(context));
}
/**
* Adds the specified action context consumer to the executor.
*/
public ExecutorBuilder addActionContextConsumer(ActionContextConsumer consumer) {
this.actionContextConsumers.add(consumer);
return this;
}
/**
* Sets the cache for action input files. Only one module may set the cache. If multiple modules
* set it, this method will throw an {@link IllegalStateException}.
*/
public ExecutorBuilder setActionInputFileCache(ActionInputFileCache cache) {
Preconditions.checkState(this.cache == null);
this.cache = Preconditions.checkNotNull(cache);
return this;
}
}
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