我正在做一個簡單的2級緩存實驗與存儲過程,並收到一個表或視圖不存在Oracle錯誤。NHibernate第二級緩存不返回對象
緩存正在檢索我的DTO對象並嘗試向數據庫建立SQL語句。我猜這是一些配置錯誤。
這裏是在app.config
<hibernate-configuration xmlns="urn:nhibernate-configuration-2.2">
<session-factory name="NHibernate.Test">
<property name="connection.driver_class">NHibernate.Driver.OracleDataClientDriver</property>
<property name="show_sql">true</property>
<property name="dialect">NHibernate.Dialect.Oracle10gDialect</property>
<property name="query.substitutions">true 1, false 0, yes 'Y', no 'N'</property>
<property name="cache.use_query_cache">true</property>
<property name="cache.use_second_level_cache">true</property>
<property name="cache.provider_class">NHibernate.Caches.SysCache.SysCacheProvider, NHibernate.Caches.SysCache</property>
</session-factory>
</hibernate-configuration>
而這裏的代碼進行測試: [TestMethod的] 公共無效GetNomHeaderInfo_TestingCache_BPNomHeaderShouldBeCached(){ // 安排 DateTime的開始時間; DateTime EndTime; TimeSpan FirstTry; TimeSpan SecondTry;
//Act
using (var session = factory.OpenSession())
{
var query = session.GetNamedQuery("GetMyDTO");
query.SetInt32("id", 1);
query.SetCacheRegion("Id");
query.SetCacheMode(CacheMode.Normal);
query.SetCacheable(true);
StartTime = DateTime.Now;
myDTO DTO = query.UniqueResult<myDTO>();
EndTime = DateTime.Now;
FirstTry = EndTime - StartTime;
}
using (var session = factory.OpenSession())
{
var query = session.GetNamedQuery("GetMyDTO");
query.SetInt32("id", 1);
query.SetCacheRegion("Id");
query.SetCacheMode(CacheMode.Normal);
query.SetCacheable(true);
StartTime = DateTime.Now;
myDTO DTO = query.UniqueResult<myDTO>();
EndTime = DateTime.Now;
SecondTry = EndTime - StartTime;
}
//Test
Assert.IsTrue(SecondTry < FirstTry);
}
我然後錯誤了,當我做第二個query.UniqueResult();該錯誤信息是:
SELECT blah blah_.blahblah, etc FROM MyDTO SomeAlias_ WHERE SomeAlias_.id=:p0
但是沒有myDTO表或視圖。我不知道爲什麼NHibernate想從緩存中取出myDTO,然後嘗試創建一條SQL語句。
這裏的痕跡:
NHibernate.Cache.StandardQueryCache: DEBUG checking cached query results in region: 'Id'; sql: { call SomePackage.MyProc(?) }; parameters: []; named parameters: {'id'='1'}
NHibernate.Cache.StandardQueryCache: DEBUG checking cached query results in region: 'Id'; sql: { call SomePackage.MyProc(?) }; parameters: []; named parameters: {'id'='1'}
NHibernate.Caches.SysCache.SysCache: DEBUG Fetching object 'NHibernate-Cache:nomId:sql: { call SomePackage.MyProc(?) }; parameters: []; named parameters: {'id'='1'}@601355831' from the cache.
NHibernate.Caches.SysCache.SysCache: DEBUG Fetching object 'NHibernate-Cache:nomId:sql: { call SomePackage.MyProc(?) }; parameters: []; named parameters: {'id'='1'}@601355831' from the cache.
NHibernate.Cache.StandardQueryCache: DEBUG Checking query spaces for up-to-dateness [MyDTO]
NHibernate.Cache.StandardQueryCache: DEBUG Checking query spaces for up-to-dateness [MyDTO]
NHibernate.Caches.SysCache.SysCache: DEBUG Fetching object 'NHibernate-Cache:UpdateTimestampsCache:[email protected]' from the cache.
NHibernate.Caches.SysCache.SysCache: DEBUG Fetching object 'NHibernate-Cache:UpdateTimestampsCache:[email protected]' from the cache.
NHibernate.Cache.StandardQueryCache: DEBUG returning cached query results for: sql: { call SomePackage.MyProc(?) }; parameters: []; named parameters: {'id'='1'}
NHibernate.Cache.StandardQueryCache: DEBUG returning cached query results for: sql: { call SomePackage.MyProc(?) }; parameters: []; named parameters: {'id'='1'}
NHibernate.Event.Default.DefaultLoadEventListener: DEBUG loading entity: [MyAssembly.MyDTO#1]
NHibernate.Event.Default.DefaultLoadEventListener: DEBUG loading entity: [MyAssembly.MyDTO#1]
NHibernate.Event.Default.DefaultLoadEventListener: DEBUG attempting to resolve: [MyAssembly.MyDTO#1]
NHibernate.Event.Default.DefaultLoadEventListener: DEBUG attempting to resolve: [MyAssembly.MyDTO#1]
NHibernate.Event.Default.DefaultLoadEventListener: DEBUG object not resolved in any cache: [MyAssembly.MyDTO#1]
NHibernate.Event.Default.DefaultLoadEventListener: DEBUG object not resolved in any cache: [MyAssembly.MyDTO#1]
NHibernate.Persister.Entity.AbstractEntityPersister: DEBUG Fetching entity: [MyAssembly.MyDTO#1]
NHibernate.Persister.Entity.AbstractEntityPersister: DEBUG Fetching entity: [MyAssembly.MyDTO#1]
NHibernate.Loader.Loader: DEBUG loading entity: [MyAssembly.MyDTO#1]
NHibernate.Loader.Loader: DEBUG loading entity: [MyAssembly.MyDTO#1]
NHibernate.AdoNet.AbstractBatcher: DEBUG Opened new IDbCommand, open IDbCommands: 1
NHibernate.AdoNet.AbstractBatcher: DEBUG Opened new IDbCommand, open IDbCommands: 1
NHibernate.AdoNet.AbstractBatcher: DEBUG Building an IDbCommand object for the SqlString: SELECT blah blah_.blahblah, etc FROM MyDTO SomeAlias_ WHERE SomeAlias_.id=:p0
任何人都知道我在做什麼錯在這裏?
謝謝,比爾N
感謝迭戈你的迴應。 –
感謝Diego的回覆。理想情況下,我喜歡緩存MyDTO實體(並查詢我擁有列表的位置)。我已經簡化了場景,但是存儲過程通常是100到500行,所以我不認爲加載自定義SQL會有幫助。你知道如何緩存實體(MyDTO)的文檔或樣本在哪裏? –
@BillNielsen你不明白我的答案。您必須將您的存儲過程調用作爲用於加載的自定義sql。 –