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// Copyright (C) 2010 The Android Open Source Project
//
// 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.gerrit.sshd;
import com.google.gerrit.server.config.GerritServerConfig;
import com.google.gerrit.server.git.WorkQueue;
import com.google.inject.Inject;
import org.eclipse.jgit.lib.Config;
import java.util.concurrent.ThreadFactory;
public class CommandExecutorQueueProvider implements QueueProvider {
private int poolSize;
private final int batchThreads;
private final WorkQueue.Executor interactiveExecutor;
private final WorkQueue.Executor batchExecutor;
@Inject
public CommandExecutorQueueProvider(@GerritServerConfig final Config config,
final WorkQueue queues) {
final int cores = Runtime.getRuntime().availableProcessors();
poolSize = config.getInt("sshd", "threads", 3 * cores / 2);
batchThreads = config.getInt("sshd", "batchThreads", 0);
if (batchThreads > poolSize) {
poolSize += batchThreads;
}
int interactiveThreads = Math.max(1, poolSize - batchThreads);
interactiveExecutor = queues.createQueue(interactiveThreads,
"SSH-Interactive-Worker");
if (batchThreads != 0) {
batchExecutor = queues.createQueue(batchThreads, "SSH-Batch-Worker");
setThreadFactory(batchExecutor);
} else {
batchExecutor = interactiveExecutor;
}
setThreadFactory(interactiveExecutor);
}
private void setThreadFactory(WorkQueue.Executor executor) {
final ThreadFactory parent = executor.getThreadFactory();
executor.setThreadFactory(new ThreadFactory() {
@Override
public Thread newThread(final Runnable task) {
final Thread t = parent.newThread(task);
t.setPriority(Thread.MIN_PRIORITY);
return t;
}
});
}
@Override
public WorkQueue.Executor getInteractiveQueue() {
return interactiveExecutor;
}
@Override
public WorkQueue.Executor getBatchQueue() {
return batchExecutor;
}
}
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