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// Copyright 2014 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.rules.fileset;
import com.google.common.collect.ImmutableList;
import com.google.common.util.concurrent.ThreadFactoryBuilder;
import com.google.devtools.build.lib.actions.ActionContextProvider;
import com.google.devtools.build.lib.actions.BlazeExecutor;
import com.google.devtools.build.lib.actions.ExecutionStrategy;
import com.google.devtools.build.lib.actions.Executor.ActionContext;
import com.google.devtools.build.lib.events.Reporter;
import java.util.concurrent.LinkedBlockingQueue;
import java.util.concurrent.ThreadPoolExecutor;
import java.util.concurrent.TimeUnit;
/**
* Context for Fileset manifest actions. It currently only provides a ThreadPoolExecutor.
*
* <p>Fileset is a legacy, google-internal mechanism to make parts of the source tree appear as a
* tree in the output directory.
*/
@ExecutionStrategy(contextType = FilesetActionContext.class)
public final class FilesetActionContextImpl implements FilesetActionContext {
// TODO(bazel-team): it would be nice if this weren't shipped in Bazel at all.
/**
* Factory class.
*/
public static class Provider extends ActionContextProvider {
private FilesetActionContextImpl impl;
private final Reporter reporter;
private final ThreadPoolExecutor filesetPool;
public Provider(Reporter reporter, String workspaceName) {
this.reporter = reporter;
this.filesetPool = newFilesetPool(100);
this.impl = new FilesetActionContextImpl(filesetPool, workspaceName);
}
private static ThreadPoolExecutor newFilesetPool(int threads) {
ThreadPoolExecutor pool = new ThreadPoolExecutor(threads, threads, 3L, TimeUnit.SECONDS,
new LinkedBlockingQueue<Runnable>());
// Do not consume threads when not in use.
pool.allowCoreThreadTimeOut(true);
pool.setThreadFactory(new ThreadFactoryBuilder().setNameFormat("Fileset worker %d").build());
return pool;
}
@Override
public Iterable<ActionContext> getActionContexts() {
return ImmutableList.<ActionContext>of(impl);
}
@Override
public void executionPhaseEnding() {
BlazeExecutor.shutdownHelperPool(reporter, filesetPool, "Fileset");
}
}
private final ThreadPoolExecutor filesetPool;
private final String workspaceName;
private FilesetActionContextImpl(ThreadPoolExecutor filesetPool, String workspaceName) {
this.filesetPool = filesetPool;
this.workspaceName = workspaceName;
}
@Override
public ThreadPoolExecutor getFilesetPool() {
return filesetPool;
}
@Override
public String getWorkspaceName() {
return workspaceName;
}
}
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