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POHow to get nhibernate to cache tables referenced via many-to-one - is my config correct?
 

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  1. POHow to get nhibernate to cache tables referenced via many-to-one - is my config correct?
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    <p>I've been trying to get this working for a while now with no luck. I want to enable the 2nd level cache to prevent fetching from some lookup tables.</p> <p>I set up my configuration in code</p> <pre><code>cfg = new Configuration(); cfg.Properties[NHibernate.Cfg.Environment.ConnectionProvider] = "NHibernate.Connection.DriverConnectionProvider"; string connectionString = connection.ConnectionString; cfg.Properties[NHibernate.Cfg.Environment.ConnectionString] = connectionString; cfg.Properties[NHibernate.Cfg.Environment.ConnectionDriver] = "NHibernate.Driver.SqlClientDriver"; cfg.Properties[NHibernate.Cfg.Environment.Dialect] = "NHibernate.Dialect.MsSql2005Dialect"; cfg.Properties[NHibernate.Cfg.Environment.CommandTimeout] = "720"; cfg.Properties[NHibernate.Cfg.Environment.CacheProvider] = "NHibernate.Cache.HashtableCacheProvider"; cfg.Properties[NHibernate.Cfg.Environment.UseSecondLevelCache] = "true"; cfg.Properties[NHibernate.Cfg.Environment.UseQueryCache] = "true"; cfg.AddAssembly("APPName.PersistentEntities"); factory = cfg.BuildSessionFactory(); </code></pre> <p>Then in my xml configuration I added the cache attribute:</p> <pre><code>&lt;?xml version="1.0" encoding="utf-8" ?&gt; &lt;hibernate-mapping xmlns="urn:nhibernate-mapping-2.2"&gt; &lt;class name="APPName.PersistentEntities.LockStatus, APPName.PersistentEntities" table="LockStatus" lazy="false"&gt; &lt;meta attribute="class-description"&gt;lockstatus&lt;/meta&gt; &lt;cache usage="read-only" /&gt; &lt;id name="Id" column="Id" type="Int32" unsaved-value="0"&gt; &lt;generator class="native"&gt;&lt;/generator&gt; &lt;/id&gt; &lt;property name="Name" column="Name" type="String" length="100" not-null="true"/&gt; &lt;/class&gt; &lt;/hibernate-mapping&gt; </code></pre> <p>This entity is then referenced from other uncached entities</p> <pre><code>&lt;hibernate-mapping xmlns="urn:nhibernate-mapping-2.2"&gt; &lt;class name="APPName.PersistentEntities.Entity, APPName.PersistentEntities" table="Entity" lazy="false"&gt; &lt;meta attribute="class-description"&gt;entity&lt;/meta&gt; &lt;id name="Id" column="Id" type="Int32" unsaved-value="0"&gt; &lt;generator class="native"&gt; &lt;/generator&gt; &lt;/id&gt; &lt;property name="Name" column="Name" type="String" length="500" not-null="true"&gt; &lt;meta attribute="field-description"&gt;name&lt;/meta&gt; &lt;/property&gt; &lt;many-to-one name="LockStatus" column="LockStatusId" class="APPName.PersistentEntities.LockStatus, APPName.PersistentEntities" not-null="false" lazy="false"&gt; &lt;/many-to-one&gt; &lt;/class&gt; &lt;/hibernate-mapping&gt; </code></pre> <p>></p> <p>I query this other entity with something like:</p> <pre><code>session = factory.OpenSession(); IList&lt;T&gt; s = session.CreateSQLQuery(query).AddEntity(typeof(T)).SetCacheable(true).List&lt;T&gt;(); session.Clear(); session.Close(); </code></pre> <p>The query and mappings run fine so to make sure its using the cache I try updating the names in the database. When I click again in the application I see the updated names so I assume it is not using the cache re-querying.</p>
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