asp.net - 二级缓存不缓存NHibernate中过滤的集合？

Question

我正在使用 NHibernate 3.0 配置 二级缓存。二级缓存对于实体和集合效果很好，但我也有一些具有过滤集合的实体。

 <bag name="EntityTrans" cascade="all-delete-orphan" table="EntityTrans">
            <key column="entityId" not-null="true" />
            <one-to-many class="MyDomain.EntityTran, MyDomain" />
            <filter name="cultureFilter" condition=":cultureCode = CultureCode" />
        </bag>

NHibernate 2 级缓存不缓存上述过滤集合。我可以在 NProf 中看到过滤集合查询被发送到数据库。我的 NHibernate 配置文件有以下条目。

<class-cache class="MyDomain.EntityTran, MuDomain" region="MyRegion" usage="read-only"/>
<collection-cache collection="MyDomain.Entity.EntityTrans" region="MyRegion" usage="read-only"/>

是否需要添加更多内容来缓存过滤后的集合？

Answer 1

目前 NHibernate 不支持过滤集合的二级缓存。

首先我发现了 forum post .然后我查看了代码(CollectionLoadContext.cs ~line 299)，发现如下:

if (!(session.EnabledFilters.Count == 0) && persister.IsAffectedByEnabledFilters(session))
{
    // some filters affecting the collection are enabled on the session, so do not do the put into the cache.
    log.Debug("Refusing to add to cache due to enabled filters");
    // todo : add the notion of enabled filters to the CacheKey to differentiate filtered collections from non-filtered;
    //      but CacheKey is currently used for both collections and entities; would ideally need to define two separate ones;
    //      currently this works in conjunction with the check on
    //      DefaultInitializeCollectionEventHandler.initializeCollectionFromCache() (which makes sure to not read from
    //      cache with enabled filters).
    return; // EARLY EXIT!!!!!
}