| // Copyright (C) 2017 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.googlesource.gerrit.plugins.ratelimiter; |
| |
| import com.google.common.cache.CacheBuilder; |
| import com.google.common.cache.CacheLoader; |
| import com.google.common.cache.LoadingCache; |
| import com.google.common.cache.RemovalListener; |
| import com.google.gerrit.extensions.events.LifecycleListener; |
| import com.google.gerrit.extensions.registration.DynamicSet; |
| import com.google.gerrit.server.git.validators.UploadValidationListener; |
| import com.google.inject.AbstractModule; |
| import com.google.inject.Inject; |
| import com.google.inject.Provider; |
| import com.google.inject.Provides; |
| import com.google.inject.Singleton; |
| import com.google.inject.assistedinject.FactoryModuleBuilder; |
| import com.google.inject.internal.UniqueAnnotations; |
| import com.google.inject.name.Named; |
| import java.util.Optional; |
| import java.util.concurrent.ScheduledExecutorService; |
| import java.util.concurrent.TimeUnit; |
| |
| class Module extends AbstractModule { |
| static final String UPLOAD_PACK_PER_HOUR = "upload_pack_per_hour"; |
| |
| @Override |
| protected void configure() { |
| DynamicSet.bind(binder(), UploadValidationListener.class).to(RateLimitUploadPack.class); |
| bind(Configuration.class).asEagerSingleton(); |
| bind(ScheduledExecutorService.class) |
| .annotatedWith(RateLimitExecutor.class) |
| .toProvider(RateLimitExecutorProvider.class); |
| bind(LifecycleListener.class) |
| .annotatedWith(UniqueAnnotations.create()) |
| .to(RateLimitExecutorProvider.class); |
| bind(LifecycleListener.class) |
| .annotatedWith(UniqueAnnotations.create()) |
| .to(RateLimiterStatsLog.class); |
| install(new FactoryModuleBuilder().build(HourlyRateLimiter.Factory.class)); |
| install(new FactoryModuleBuilder().build(WarningHourlyRateLimiter.Factory.class)); |
| install(new FactoryModuleBuilder().build(WarningHourlyUnlimitedRateLimiter.Factory.class)); |
| } |
| |
| @Provides |
| @Named(UPLOAD_PACK_PER_HOUR) |
| @Singleton |
| LoadingCache<String, RateLimiter> getUploadPackPerHourCache(Provider<RateLimiterLoader> loader) { |
| return CacheBuilder.newBuilder() |
| .expireAfterAccess(1, TimeUnit.HOURS) |
| .removalListener( |
| (RemovalListener<String, RateLimiter>) |
| removalNotification -> removalNotification.getValue().close()) |
| .build(loader.get()); |
| } |
| |
| private static class RateLimiterLoader extends CacheLoader<String, RateLimiter> { |
| private final RateLimitFinder finder; |
| private final HourlyRateLimiter.Factory hourlyRateLimiterFactory; |
| private final WarningHourlyRateLimiter.Factory warningHourlyRateLimiterFactory; |
| private final WarningHourlyUnlimitedRateLimiter.Factory |
| warningHourlyUnlimitedRateLimiterFactory; |
| |
| @Inject |
| RateLimiterLoader( |
| RateLimitFinder finder, |
| HourlyRateLimiter.Factory hourlyRateLimiterFactory, |
| WarningHourlyRateLimiter.Factory warningHourlyRateLimiterFactory, |
| WarningHourlyUnlimitedRateLimiter.Factory warningUnlimitedRateLimiterFactory) { |
| this.finder = finder; |
| this.hourlyRateLimiterFactory = hourlyRateLimiterFactory; |
| this.warningHourlyRateLimiterFactory = warningHourlyRateLimiterFactory; |
| this.warningHourlyUnlimitedRateLimiterFactory = warningUnlimitedRateLimiterFactory; |
| } |
| |
| @Override |
| public RateLimiter load(String key) { |
| Optional<RateLimit> limit = finder.find(RateLimitType.UPLOAD_PACK_PER_HOUR, key); |
| Optional<RateLimit> warn = finder.find(RateLimitType.UPLOAD_PACK_PER_HOUR_WARN, key); |
| if (!limit.isPresent() && !warn.isPresent()) { |
| return UnlimitedRateLimiter.INSTANCE; |
| } |
| |
| // In the case that there is a warning but no limit |
| Integer myLimit = Integer.MAX_VALUE; |
| if (limit.isPresent()) { |
| myLimit = limit.get().getRatePerHour(); |
| } |
| |
| RateLimiter rateLimiter = hourlyRateLimiterFactory.create(myLimit); |
| |
| if (warn.isPresent()) { |
| if (limit.isPresent()) { |
| return warningHourlyRateLimiterFactory.create( |
| rateLimiter, key, warn.get().getRatePerHour()); |
| } |
| return warningHourlyUnlimitedRateLimiterFactory.create( |
| rateLimiter, key, warn.get().getRatePerHour()); |
| } |
| return rateLimiter; |
| } |
| } |
| } |