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[nhibernate-issues] [NHJIRA] Resolved: (NH-2673) Nhibernate 2nd level cache and Result transformer
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From: Fabio M. (JIRA) <nh...@gm...> - 2011-05-02 14:10:27
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[ http://216.121.112.228/browse/NH-2673?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Fabio Maulo resolved NH-2673.
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Resolution: Fixed
Fix Version/s: 3.2.0Alpha3
> Nhibernate 2nd level cache and Result transformer
> -------------------------------------------------
>
> Key: NH-2673
> URL: http://216.121.112.228/browse/NH-2673
> Project: NHibernate
> Issue Type: Bug
> Components: Core
> Affects Versions: 3.2.0Alpha2
> Reporter: Josef Holan
> Priority: Minor
> Fix For: 3.2.0Alpha3
>
> Attachments: Caching.zip
>
>
> I have a big problem with 2nd level cache in NHibernate. Everything is working fine(Cache is running well) until I use
> .SetResultTransformer(new DistinctRootEntityResultTransformer())
> Example code:
> using (var session = SessionFactory.OpenSession())
> {
> Console.WriteLine("---> using query first time");
> var query = session
> .CreateQuery("from Blog b where b.Author = :author")
> .SetString("author", "Gabriel")
> .SetCacheable(true)
> .SetResultTransformer(new DistinctRootEntityResultTransformer())
> ;
> var list = query.List<Blog>();
> }
> Exception:
> NHibernate.PropertyAccessException: Exception occurred getter of Caching.Blog.Id
> v NHibernate.Properties.BasicPropertyAccessor.BasicGetter.Get(Object target) v d:\CSharp\NH\NH\nhibernate\src\NHibernate\Properties\BasicPropertyAccessor.cs: line 211
> v NHibernate.Tuple.Entity.AbstractEntityTuplizer.GetIdentifier(Object entity) v d:\CSharp\NH\NH\nhibernate\src\NHibernate\Tuple\Entity\AbstractEntityTuplizer.cs: line 139
> v NHibernate.Persister.Entity.AbstractEntityPersister.GetIdentifier(Object obj, EntityMode entityMode) v d:\CSharp\NH\NH\nhibernate\src\NHibernate\Persister\Entity\AbstractEntityPersister.cs: line 3883
> v NHibernate.Persister.Entity.AbstractEntityPersister.IsTransient(Object entity, ISessionImplementor session) v d:\CSharp\NH\NH\nhibernate\src\NHibernate\Persister\Entity\AbstractEntityPersister.cs: line 3669
> v NHibernate.Engine.ForeignKeys.IsTransient(String entityName, Object entity, Nullable`1 assumed, ISessionImplementor session) v ForeignKeys.cs: line 194
> v NHibernate.Engine.ForeignKeys.GetEntityIdentifierIfNotUnsaved(String entityName, Object entity, ISessionImplementor session) v ForeignKeys.cs: line 250
> v NHibernate.Type.ManyToOneType.Disassemble(Object value, ISessionImplementor session, Object owner) v ManyToOneType.cs: line 137
> v NHibernate.Cache.StandardQueryCache.Put(QueryKey key, ICacheAssembler[] returnTypes, IList result, Boolean isNaturalKeyLookup, ISessionImplementor session) v StandardQueryCache.cs: line 82
> v NHibernate.Loader.Loader.PutResultInQueryCache(ISessionImplementor session, QueryParameters queryParameters, IType[] resultTypes, IQueryCache queryCache, QueryKey key, IList result) v Loader.cs: line 1668
> v NHibernate.Loader.Loader.ListUsingQueryCache(ISessionImplementor session, QueryParameters queryParameters, ISet`1 querySpaces, IType[] resultTypes) v Loader.cs: line 1617
> v NHibernate.Loader.Loader.List(ISessionImplementor session, QueryParameters queryParameters, ISet`1 querySpaces, IType[] resultTypes) v Loader.cs: line 1591
> v NHibernate.Hql.Ast.ANTLR.Loader.QueryLoader.List(ISessionImplementor session, QueryParameters queryParameters) v QueryLoader.cs: line 300
> v NHibernate.Hql.Ast.ANTLR.QueryTranslatorImpl.List(ISessionImplementor session, QueryParameters queryParameters) v QueryTranslatorImpl.cs: line 111
> v NHibernate.Engine.Query.HQLQueryPlan.PerformList(QueryParameters queryParameters, ISessionImplementor session, IList results) v HQLQueryPlan.cs: line 105
> v NHibernate.Impl.SessionImpl.List(String query, QueryParameters queryParameters, IList results) v SessionImpl.cs: line 616
> v NHibernate.Impl.SessionImpl.List<T>(String query, QueryParameters parameters) v SessionImpl.cs: line 592
> v NHibernate.Impl.QueryImpl.List<T>() v QueryImpl.cs: line 94
> v UnitTests.when_having_blog_with_posts.trying_to_cache_a_complex_query() v Blog_Spec.cs: line 110
> Mapping:
> <?xml version="1.0" encoding="utf-8" ?>
> <hibernate-mapping xmlns="urn:nhibernate-mapping-2.2"
> namespace="Caching"
> assembly="Caching">
> <class name="Blog">
> <cache usage="read-write"/>
> <id name="Id">
> <generator class="hilo"/>
> </id>
> <property name="Author"/>
> <property name="Name"/>
> <set name="Posts" cascade="all" lazy="true">
> <cache usage="read-write"/>
> <key column="BlogId"/>
> <one-to-many class="Post"/>
> </set>
> </class>
> <class name="Post">
> <cache usage="read-write"/>
> <id name="Id">
> <generator class="hilo"/>
> </id>
> <property name="Title"/>
> <property name="Body"/>
> </class>
> </hibernate-mapping>
> Classes:
> public class Blog
> {
> public virtual int Id { get; set; }
> public virtual string Author { get; set; }
> public virtual string Name { get; set; }
> public virtual ISet<Post> Posts { get; set; }
> public Blog()
> {
> Posts = new HashedSet<Post>();
> }
> }
> public class Post
> {
> public virtual int Id { get; private set; }
> public virtual string Title { get; set; }
> public virtual string Body { get; set; }
> }
> nhibernate.config:
> <property name="cache.provider_class">NHibernate.Cache.HashtableCacheProvider</property>
> <property name="cache.use_second_level_cache">true</property>
> <property name="cache.use_query_cache" >true</property>
> In summary: Cache and nhibernate running well until i use result transformer. To work i must disable transformer or 2nd level cache. It is not working together
> This is only example, i know that distinct in this situation is stupid.
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