| // 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.google.gerrit.server.account.externalids; |
| |
| import com.google.gerrit.server.cache.CacheModule; |
| import com.google.gerrit.server.cache.serialize.ObjectIdCacheSerializer; |
| import com.google.inject.TypeLiteral; |
| import java.time.Duration; |
| import org.eclipse.jgit.lib.ObjectId; |
| |
| public class ExternalIdCacheModule extends CacheModule { |
| @Override |
| protected void configure() { |
| persist(ExternalIdCacheImpl.CACHE_NAME, ObjectId.class, new TypeLiteral<AllExternalIds>() {}) |
| // The cached data is potentially pretty large and we are always only interested |
| // in the latest value. However, due to a race condition, it is possible for different |
| // threads to observe different values of the meta ref, and hence request different keys |
| // from the cache. Extend the cache size by 1 to cover this case, but expire the extra |
| // object after a short period of time, since it may be a potentially large amount of |
| // memory. |
| // When loading a new value because the primary data advanced, we want to leverage the old |
| // cache state to recompute only what changed. This doesn't affect cache size though as |
| // Guava calls the loader first and evicts later on. |
| .maximumWeight(2) |
| .expireFromMemoryAfterAccess(Duration.ofMinutes(1)) |
| .diskLimit(-1) |
| .version(1) |
| .keySerializer(ObjectIdCacheSerializer.INSTANCE) |
| .valueSerializer(AllExternalIds.Serializer.INSTANCE); |
| |
| bind(ExternalIdCacheImpl.class); |
| bind(ExternalIdCache.class).to(ExternalIdCacheImpl.class); |
| } |
| } |