| // Copyright (C) 2014 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.pgm.util; |
| |
| import com.google.gerrit.server.config.GerritServerConfig; |
| import com.google.gerrit.server.config.ThreadSettingsConfig; |
| import com.google.gerrit.server.schema.DataSourceType; |
| import com.google.inject.Injector; |
| import com.google.inject.Key; |
| import org.eclipse.jgit.lib.Config; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| // TODO(dborowitz): Not necessary once we switch to NoteDb. |
| /** Utility to limit threads used by a batch program. */ |
| public class ThreadLimiter { |
| private static final Logger log = LoggerFactory.getLogger(ThreadLimiter.class); |
| |
| public static int limitThreads(Injector dbInjector, int threads) { |
| return limitThreads( |
| dbInjector.getInstance(Key.get(Config.class, GerritServerConfig.class)), |
| dbInjector.getInstance(DataSourceType.class), |
| dbInjector.getInstance(ThreadSettingsConfig.class), |
| threads); |
| } |
| |
| private static int limitThreads( |
| Config cfg, DataSourceType dst, ThreadSettingsConfig threadSettingsConfig, int threads) { |
| boolean usePool = cfg.getBoolean("database", "connectionpool", dst.usePool()); |
| int poolLimit = threadSettingsConfig.getDatabasePoolLimit(); |
| if (usePool && threads > poolLimit) { |
| log.warn("Limiting program to " + poolLimit + " threads due to database.poolLimit"); |
| return poolLimit; |
| } |
| return threads; |
| } |
| |
| private ThreadLimiter() {} |
| } |