Observable: abstract or final

[benjchristensen]

There is discussion about whether Observable should be a "final class" and only be usable via Observable.create(Func) or whether we should leave it as abstract.

Discuss and decide ...

[abersnaze]

I vote not final.
If it were final then it would be impossible to extend Observable to add operators and still interoperate with other code that uses Observable.

[benjchristensen]

Agreed

[benjchristensen]

We have decided to not make it final.

But we also have changed it from being abstract to a normal concrete class.

The 'subscribe' implementation is passed in via a protected constructor or using Observable.create(Func1)