DDS implementation classes to be removed in v3.10

Deprecated API

The following DDS classes are to be replaced with exports that do not leak the SharedObject type:

• ConsensusRegisterCollectionClass in @fluidframework/register-collection
• ConsensusOrderedCollection in @fluidframework/ordered-collection
• ConsensusQueueClass in @fluidframework/ordered-collection
• SharedTree in @fluid-experimental/tree (This needs a proper interface to be created, making it significantly more work that what is remaining for the others)
• SharedObject and SharedObjectCore in @fluidframework/shared-object-base (should be made internal once the others are addressed)

Context

These classes expose internal implementation details that consumers should not depend on. Consumers should use the corresponding interfaces (IConsensusRegisterCollection, IConsensusOrderedCollection) for typing and factory/singleton patterns for instance creation.

Approach

Use interfaces and factory patterns.

Dependencies

None.

Compatibility Concerns

None.

Phases

• Phase 1: Mark as deprecated. Done in 2.91.0 (Except for SharedTree).
• Phase 2: Remove concrete classes. Intended for release 3.10.0.

Expected Timeline

Intended for release 3.0.0.

Open Questions

Start by reviewing the exports in the named packages: @fluidframework/register-collection, @fluidframework/ordered-collection, @fluid-experimental/tree, and @fluidframework/shared-object-base. Review open pull request #27395 before making changes. Done means the concrete DDS classes no longer leak as public APIs, with the corresponding interfaces and factory or singleton patterns retained; SharedTree also needs a proper interface.