嘗試從緩存中獲取數據（對象列表）時，Hibernate二級緩存+ Ehcache問題

Question

我可以通過使用HibernateTemplate.load(Class entityClass, Serializable id)從緩存內存中獲取數據，但只能獲取一個對象，

[2012-03-06 04:34:18,755] [INFO] [com.uprr.app.rim.components.common.service.RIMSpringApplicationContext] [ApplicationContext is set and ready for use for XMF service clients....]
[2012-03-06 04:34:20,255] [WARN] [org.hibernate.mapping.RootClass] [composite-id class does not override equals(): com.uprr.app.rim.components.exinterface.domain.Track]
[2012-03-06 04:34:20,270] [WARN] [org.hibernate.mapping.RootClass] [composite-id class does not override hashCode(): com.uprr.app.rim.components.exinterface.domain.Track]
[2012-03-06 04:34:35,442] [DEBUG] [org.hibernate.cache.CacheFactory] [instantiating cache region: com.uprr.app.rim.components.masters.domain.CommPlaceTypeDO usage strategy: read-only]
[2012-03-06 04:34:35,442] [WARN] [org.hibernate.cache.CacheFactory] [read-only cache configured for mutable class: com.uprr.app.rim.components.masters.domain.CommPlaceTypeDO]
[2012-03-06 04:34:35,646] [DEBUG] [org.hibernate.cache.CacheFactory] [instantiating cache region: com.uprr.app.rim.components.masters.domain.CommPlaceDO usage strategy: read-only]
[2012-03-06 04:34:35,646] [WARN] [org.hibernate.cache.CacheFactory] [read-only cache configured for mutable class: com.uprr.app.rim.components.masters.domain.CommPlaceDO]
[2012-03-06 04:34:36,005] [INFO] [org.hibernate.cache.UpdateTimestampsCache] [starting update timestamps cache at region: org.hibernate.cache.UpdateTimestampsCache]
[2012-03-06 04:34:36,021] [INFO] [org.hibernate.cache.StandardQueryCache] [starting query cache at region: org.hibernate.cache.StandardQueryCache]
[2012-03-06 04:34:36,380] [DEBUG] [org.hibernate.SQL] [select commplacet0_.COM_PLAC_TYPE_ID as COM1_82_, commplacet0_.COM_PLAC_TYPE_CODE as COM2_82_, commplacet0_.COM_PLAC_TYPE_DESC as COM3_82_, commplacet0_.ACT_FLAG as ACT4_82_, commplacet0_.CRTN_USER_ID as CRTN5_82_, commplacet0_.CRTN_DT as CRTN6_82_, commplacet0_.LAST_UPTD_USER_ID as LAST7_82_, commplacet0_.LAST_UPTD_DT as LAST8_82_ from RIM_COM_PLAC_TYPE_MSTR commplacet0_ where commplacet0_.COM_PLAC_TYPE_ID=172 order by commplacet0_.COM_PLAC_TYPE_DESC]
[2012-03-06 04:34:37,052] [DEBUG] [org.hibernate.cache.ReadOnlyCache] [**Caching**: com.uprr.app.rim.components.masters.domain.CommPlaceTypeDO#172]
[2012-03-06 04:34:37,130] [DEBUG] [org.hibernate.cache.ReadOnlyCache] [**Cache hit:** com.uprr.app.rim.components.masters.domain.CommPlaceTypeDO#172]

但是當我試圖通過使用loadAll （）， getHibernateTemplate().find(strQuery) ， Query.list()等來從緩存中獲取對象列表時，這些方法將再次命中數據庫並嘗試再次緩存數據在記錄器中顯示警報：

[2012-03-08 06:56:10,050] [DEBUG] [org.hibernate.cache.ReadOnlyCache] [**item already cached:** com.uprr.app.rim.components.masters.domain.CommPlaceTypeDO#**180**]
[2012-03-08 06:56:10,050] [DEBUG] [org.hibernate.cache.ReadOnlyCache] [item already cached: com.uprr.app.rim.components.masters.domain.CommPlaceTypeDO#**169**]
[2012-03-08 06:56:10,050] [DEBUG] [org.hibernate.cache.ReadOnlyCache] [item already cached: com.uprr.app.rim.components.masters.domain.CommPlaceTypeDO#**166**]
[2012-03-08 06:56:10,050] [DEBUG] [org.hibernate.cache.ReadOnlyCache] [item already cached: com.uprr.app.rim.components.masters.domain.CommPlaceTypeDO#**139**]
[2012-03-08 06:56:10,050] [DEBUG] [org.hibernate.cache.ReadOnlyCache] [item already cached: com.uprr.app.rim.components.masters.domain.CommPlaceTypeDO#140]
[2012-03-08 06:56:10,050] [DEBUG] [org.hibernate.cache.ReadOnlyCache] [item already cached: com.uprr.app.rim.components.masters.domain.CommPlaceTypeDO#138]
[2012-03-08 06:56:10,050] [DEBUG] [org.hibernate.cache.ReadOnlyCache] [item already cached: com.uprr.app.rim.components.masters.domain.CommPlaceTypeDO#149]
[2012-03-08 06:56:10,050] [DEBUG] [org.hibernate.cache.ReadOnlyCache] [item already cached: com.uprr.app.rim.components.masters.domain.CommPlaceTypeDO#143]
[2012-03-08 06:56:10,050] [DEBUG] [org.hibernate.cache.ReadOnlyCache] [item already cached: com.uprr.app.rim.components.masters.domain.CommPlaceTypeDO#130]
[2012-03-08 06:56:10,050] [DEBUG] [org.hibernate.cache.ReadOnlyCache] [item already cached: com.uprr.app.rim.components.masters.domain.CommPlaceTypeDO#142]
[2012-03-08 06:56:10,050] [DEBUG] [org.hibernate.cache.ReadOnlyCache] [item already cached: com.uprr.app.rim.components.masters.domain.CommPlaceTypeDO#165]
[2012-03-08 06:56:10,050] [DEBUG] [org.hibernate.cache.ReadOnlyCache] [item already cached: com.uprr.app.rim.components.masters.domain.CommPlaceTypeDO#167]
[2012-03-08 06:56:10,050] [DEBUG] [org.hibernate.cache.ReadOnlyCache] [item already cached: com.uprr.app.rim.components.masters.domain.CommPlaceTypeDO#168]

Answer 1

在激活二級緩存並嘗試緩存我的標准時，我實際上遇到了同樣的問題。

如果我沒有將cacheable設置為true，

更新：我終於找到了解決方案，問題來自我的hibernate版本。 我在休眠3.2。 升級到3.6.9解決了我的問題:)

希望它可以幫助！