Unable to use DistributedCache with JsonCacheSerializer

[ghost]

Hi,
following up on #91:
I'm trying to use JsonCacheSerializer and the DistributedCache options (currently MemoryDistributedCache).

Looking at the code of CoreDistributedCache.Put I see, that it tries to cache a Tuple<object, object> of the key and the value. The key is a CacheKey.
The JsonCacheSerializer fails, because it does not know tuples nor CacheKeys (nor QueryKeys).

I wonder how this is supposed to work - am I missing something?

Here is an exception + stacktrace after I ran RegisterType(typeof(Tuple<object, object>), "tuoo") to register the tuple. I can also register the CacheKey, but it will fail when deserializing, obviously needing more work than just registering the type.

InvalidOperationException: Unknown type 'NHibernate.Cache.CacheKey, NHibernate, Version=5.2.0.0, Culture=neutral, PublicKeyToken=aa95f207798dfdb4', use JsonCacheSerializer.RegisterType method to register it.

NHibernate.Caches.Util.JsonSerializer.JsonCacheSerializer+ExplicitSerializationBinder.BindToName(Type serializedType, out string assemblyName, out string typeName)
Newtonsoft.Json.Utilities.ReflectionUtils.GetFullyQualifiedTypeName(Type t, ISerializationBinder binder)
Newtonsoft.Json.Utilities.ReflectionUtils.GetTypeName(Type t, TypeNameAssemblyFormatHandling assemblyFormat, ISerializationBinder binder)
Newtonsoft.Json.Serialization.JsonSerializerInternalWriter.WriteTypeProperty(JsonWriter writer, Type type)
Newtonsoft.Json.Serialization.JsonSerializerInternalWriter.WriteObjectStart(JsonWriter writer, object value, JsonContract contract, JsonProperty member, JsonContainerContract collectionContract, JsonProperty containerProperty)
Newtonsoft.Json.Serialization.JsonSerializerInternalWriter.SerializeObject(JsonWriter writer, object value, JsonObjectContract contract, JsonProperty member, JsonContainerContract collectionContract, JsonProperty containerProperty)
Newtonsoft.Json.Serialization.JsonSerializerInternalWriter.SerializeValue(JsonWriter writer, object value, JsonContract valueContract, JsonProperty member, JsonContainerContract containerContract, JsonProperty containerProperty)
Newtonsoft.Json.Serialization.JsonSerializerInternalWriter.SerializeObject(JsonWriter writer, object value, JsonObjectContract contract, JsonProperty member, JsonContainerContract collectionContract, JsonProperty containerProperty)
Newtonsoft.Json.Serialization.JsonSerializerInternalWriter.SerializeValue(JsonWriter writer, object value, JsonContract valueContract, JsonProperty member, JsonContainerContract containerContract, JsonProperty containerProperty)
Newtonsoft.Json.Serialization.JsonSerializerInternalWriter.Serialize(JsonWriter jsonWriter, object value, Type objectType)
Newtonsoft.Json.JsonSerializer.SerializeInternal(JsonWriter jsonWriter, object value, Type objectType)
Newtonsoft.Json.JsonSerializer.Serialize(JsonWriter jsonWriter, object value, Type objectType)
NHibernate.Caches.Util.JsonSerializer.JsonCacheSerializer.Serialize(object value)
NHibernate.Caches.CoreDistributedCache.CoreDistributedCacheBase.Put(object key, object value)
NHibernate.Caches.CoreDistributedCache.CoreDistributedCache.Put(object key, object value)
NHibernate.Cache.ReadWriteCache.Put(CacheKey key, object value, long txTimestamp, object version, IComparer versionComparator, bool minimalPut)
NHibernate.Engine.TwoPhaseLoad.InitializeEntity(object entity, bool readOnly, ISessionImplementor session, PreLoadEvent preLoadEvent, PostLoadEvent postLoadEvent, Action<IEntityPersister, CachePutData> cacheBatchingHandler)
NHibernate.Loader.Loader.InitializeEntitiesAndCollections(IList hydratedObjects, DbDataReader reader, ISessionImplementor session, bool readOnly, CacheBatcher cacheBatcher)
NHibernate.Loader.Loader.DoQuery(ISessionImplementor session, QueryParameters queryParameters, bool returnProxies, IResultTransformer forcedResultTransformer)
NHibernate.Loader.Loader.DoQueryAndInitializeNonLazyCollections(ISessionImplementor session, QueryParameters queryParameters, bool returnProxies, IResultTransformer forcedResultTransformer)
NHibernate.Loader.Loader.DoQueryAndInitializeNonLazyCollections(ISessionImplementor session, QueryParameters queryParameters, bool returnProxies)
NHibernate.Loader.Loader.LoadEntity(ISessionImplementor session, object id, IType identifierType, object optionalObject, string optionalEntityName, object optionalIdentifier, IEntityPersister persister)

[SirMrDexter]

Facing the same error. Any suggestions?