Worker Queue: Legacy

[AndyTWF]

As part of the worker queue migration, we could adapt the current publishers do async work method to push that work onto the worker queue (a generic worker - takes a simple callback and runs it). That way we can confine all the async work to the queue, as we refactor out the workers.

Depends on the following work:

• Worker Queue: Types and Protocols #570

[sync-by-unito]

➤ Automation for Jira commented:

The link to the corresponding Jira issue is https://ably.atlassian.net/browse/SDK-3382

[lawrence-forooghian]

@AndyTWF To check I’ve understood – the idea here is to instantiate a worker queue inside DefaultPublisher and DefaultSubscriber, and to replace their performOnWorking{Thread, Queue} methods with a method that enqueues this generic function-calling worker, right?

[lawrence-forooghian]

Also, it says that it depends on #590, but that seems to be publisher specific whereas I assumed this one was about publisher and subscriber. I also don't think that we need the full properties types (i.e. #570) to be implemented in order to do this one – we just need empty placeholder properties types for publisher and subscriber, right?