need a way of activating logic once the repository is operable

We need to start a service only after the service being initialized.
Registering a framework listener, for starting our service when handling FrameworkEvent.STARTED did not solved our need.
The repository was still not available for operation at this time.
We need a way for registering an handler in the repository being callbacked once the repository will be operable.
Something like the RepositoryInitializationHandler, that is invoked when the repository is first initialized.