| // 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.QueueProvider; |
| 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 getQueue(QueueType type) { |
| switch (type) { |
| case INTERACTIVE: |
| return interactiveExecutor; |
| case BATCH: |
| default: |
| return batchExecutor; |
| } |
| } |
| } |