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// Copyright 2018 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.common.base.Throwables;
import java.io.IOException;
import javax.annotation.concurrent.ThreadSafe;
import org.apache.commons.pool2.impl.GenericKeyedObjectPool;
import org.apache.commons.pool2.impl.GenericKeyedObjectPoolConfig;
/**
* A worker pool that spawns multiple workers and delegates work to them.
*
* <p>This is useful when the worker cannot handle multiple parallel requests on its own and we need
* to pre-fork a couple of them instead.
*/
@ThreadSafe
final class SimpleWorkerPool extends GenericKeyedObjectPool<WorkerKey, Worker> {
public SimpleWorkerPool(WorkerFactory factory, GenericKeyedObjectPoolConfig config) {
super(factory, config);
}
@Override
public Worker borrowObject(WorkerKey key) throws IOException, InterruptedException {
try {
return super.borrowObject(key);
} catch (Throwable t) {
Throwables.propagateIfPossible(t, IOException.class, InterruptedException.class);
throw new RuntimeException("unexpected", t);
}
}
@Override
public void invalidateObject(WorkerKey key, Worker obj) throws IOException, InterruptedException {
try {
super.invalidateObject(key, obj);
} catch (Throwable t) {
Throwables.propagateIfPossible(t, IOException.class, InterruptedException.class);
throw new RuntimeException("unexpected", t);
}
}
}
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