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// Copyright 2015 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.worker;
import com.google.devtools.build.lib.events.Event;
import com.google.devtools.build.lib.events.Reporter;
import com.google.devtools.build.lib.vfs.Path;
import org.apache.commons.pool2.BaseKeyedPooledObjectFactory;
import org.apache.commons.pool2.PooledObject;
import org.apache.commons.pool2.impl.DefaultPooledObject;
/**
* Factory used by the pool to create / destroy / validate worker processes.
*/
final class WorkerFactory extends BaseKeyedPooledObjectFactory<WorkerKey, Worker> {
private Path logDir;
private Reporter reporter;
private boolean verbose;
public void setLogDirectory(Path logDir) {
this.logDir = logDir;
}
public void setReporter(Reporter reporter) {
this.reporter = reporter;
}
public void setVerbose(boolean verbose) {
this.verbose = verbose;
}
@Override
public Worker create(WorkerKey key) throws Exception {
return Worker.create(key, logDir, reporter, verbose);
}
/**
* Use the DefaultPooledObject implementation.
*/
@Override
public PooledObject<Worker> wrap(Worker worker) {
return new DefaultPooledObject<>(worker);
}
/**
* When a worker process is discarded, destroy its process, too.
*/
@Override
public void destroyObject(WorkerKey key, PooledObject<Worker> p) throws Exception {
if (verbose) {
reporter.handle(
Event.info(
"Destroying "
+ key.getMnemonic()
+ " worker (id "
+ p.getObject().getWorkerId()
+ ")."));
}
p.getObject().destroy();
}
/**
* The worker is considered to be valid when its files have not changed on disk and its process is
* still alive.
*/
@Override
public boolean validateObject(WorkerKey key, PooledObject<Worker> p) {
Worker worker = p.getObject();
return key.getWorkerFilesHash().equals(worker.getWorkerFilesHash()) && worker.isAlive();
}
}
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