問題：
Hibernate の第 2 レベルのキャッシュが using で使用される条件クエリがありますcache(true)。
User user = User.createCriteria().get {
eq("id", 1l)
cache(true)
}
このコードが 2 回ヒットすると、1 回目は予期されるデータベース クエリが作成されますが、次回同じコードが実行されるときは、クエリのデータベースにヒットするのではなく、キャッシュから取得する必要があります。しかし、それは起こっていません。
ログ:
2019-08-29 23:25:06.023 DEBUG --- [nio-8080-exec-1] o.h.cache.internal.StandardQueryCache : Checking cached query results in region: org.hibernate.cache.internal.StandardQueryCache
2019-08-29 23:25:06.023 DEBUG --- [nio-8080-exec-1] o.h.c.e.i.r.EhcacheGeneralDataRegion : key: sql: select this_.id as id1_0_0_, this_.version as version2_0_0_, this_.first_name as first_na3_0_0_, this_.last_name as last_nam4_0_0_, this_.email as email5_0_0_ from user this_ where this_.id=?; parameters: 1, ; transformer: org.hibernate.transform.CacheableResultTransformer@110f2
2019-08-29 23:25:06.027 DEBUG --- [nio-8080-exec-1] o.h.c.e.i.r.EhcacheGeneralDataRegion : Element for key sql: select this_.id as id1_0_0_, this_.version as version2_0_0_, this_.first_name as first_na3_0_0_, this_.last_name as last_nam4_0_0_, this_.email as email5_0_0_ from user this_ where this_.id=?; parameters: 1, ; transformer: org.hibernate.transform.CacheableResultTransformer@110f2 is null
2019-08-29 23:25:06.028 DEBUG --- [nio-8080-exec-1] o.h.cache.internal.StandardQueryCache : Query results were not found in cache
2019-08-29 23:25:06.030 DEBUG --- [nio-8080-exec-1] org.hibernate.SQL : select this_.id as id1_0_0_, this_.version as version2_0_0_, this_.first_name as first_na3_0_0_, this_.last_name as last_nam4_0_0_, this_.email as email5_0_0_ from user this_ where this_.id=?
2019-08-29 23:25:06.046 DEBUG --- [nio-8080-exec-1] o.h.s.internal.ConcurrentStatisticsImpl : HHH000117: HQL: [CRITERIA] select this_.id as id1_0_0_, this_.version as version2_0_0_, this_.first_name as first_na3_0_0_, this_.last_name as last_nam4_0_0_, this_.email as email5_0_0_ from user this_ where this_.id=?, time: 17ms, rows: 1
2019-08-29 23:25:06.047 DEBUG --- [nio-8080-exec-1] o.h.cache.internal.StandardQueryCache : Caching query results in region: org.hibernate.cache.internal.StandardQueryCache; timestamp=6418846948913152
2019-08-29 23:25:06.049 DEBUG --- [nio-8080-exec-1] o.h.c.e.i.r.EhcacheGeneralDataRegion : key: sql: select this_.id as id1_0_0_, this_.version as version2_0_0_, this_.first_name as first_na3_0_0_, this_.last_name as last_nam4_0_0_, this_.email as email5_0_0_ from user this_ where this_.id=?; parameters: 1, ; transformer: org.hibernate.transform.CacheableResultTransformer@110f2 value: [6418846948913152, 1]
Found com.wizpanda.test.User : 1
2019-08-29 23:25:06.099 INFO --- [nio-8080-exec-1] i.StatisticalLoggingSessionEventListener : Session Metrics {
45071 nanoseconds spent acquiring 1 JDBC connections;
0 nanoseconds spent releasing 0 JDBC connections;
3767346 nanoseconds spent preparing 1 JDBC statements;
4620558 nanoseconds spent executing 1 JDBC statements;
0 nanoseconds spent executing 0 JDBC batches;
7925151 nanoseconds spent performing 1 L2C puts;
0 nanoseconds spent performing 0 L2C hits;
4562453 nanoseconds spent performing 1 L2C misses;
0 nanoseconds spent executing 0 flushes (flushing a total of 0 entities and 0 collections);
0 nanoseconds spent executing 0 partial-flushes (flushing a total of 0 entities and 0 collections)
}
環境：
- オペレーティングシステム: MacOS、CentOS7
- GORM バージョン: 6.1.11
- Grails バージョン (Grails を使用している場合): 3.3.9
- JDK バージョン: 1.8.0_91
再現する手順：
- このレポをクローン
git clone git@github.com:wizpanda/test-l2-cache.git - MySQL データベースにログインし、新しいデータベースを作成します
create database test_l2_cache - でMySQLのユーザー名とパスワードを変更します
grails-app/conf/application.yml - アプリを実行する
grails run-appか、./gradlew bootRun http://localhost:8080/ログを参照して確認する
提起された問題: https://github.com/grails/grails-data-mapping/issues/1266