Anybody know how/if it's possible to read session data from a database backed session cache back into native session structs? The data appears to be stored as a binary encoded string.

Is the real question how to take the raw serialized data stored as a string directly in the DB and deserialize it manually outside of Lucee?

Yep

This isn't necessarily straightforward, but if Lucee stores its data in a DB the same way it stores it in most caches, you'd need to start by passing it to

evaluate()

which should give you an instance of a Java object, which would have your session data inside

If I do cacheget() to get a session based on a key I know, the result is a native array, like:

ahh, well that could change everything, lol

LAS's

The value may be base64 encoded

The MonboDB cache entry uses org.lucee.mongodb.util.SerializerUtil to serialize the data before writing to the DB

I tried:

Seems his class is to override how classloading is done

And get this

Interesting, that may be correct though

right. just have to figure out how to deserialize?

It's MongoDB's native object - it's basically an ordered struct

This may be related https://github.com/lucee/extension-mongodb/blob/master/source/java/src/org/lucee/mongodb/support/ObjectSupport.java#L159-L202

I guess what I mean is it's the MongoDB java driver's native object

It's a native array of byte arrays

Yeah, right now I am trying to see if I can manually create a MongoDBCacheDocument object with a document from the database.

one of the issues with cache providers is that they need to be able to deserialize any class which gets stored in a session, so the various cache providers need to be aware of the osgi classloaders, we had that problem with ehcache recently, the ehcache provider wasn't able to deserialize postgres objects stored in the session

Can anyone point me in the Lucee codebase where session deserialization occurs with cache based sessions? I feel like I'm getting the correct result from

cacheGet()

and

MongoDBCacheEntry.getValue()

(they are the same) - I just don't understand what Lucee then does to convert/append that

Native Array byte[][]

value to the session scope.

@seandaniels The serialization/deserialization of objects is not handled by the Lucee core, so no such code exists to show you.

That makes sense. But I would expect there has to be some sort of common interface since any cache type can be used for session storage? I just don't understand why the cacheGet() for my session storage object comes back as this unusable native byte array. Or, I'm sure not unusable, just don't know how to get it into a usable state.