Description Chris Aniszczyk 2009-03-03 15:05:37 EST

[rfc 0134] DS - Better integration with ConfigAdmin/ManagedService

According the OSGi Service Platform Service Compendium R4, 4.1, the
Declarative Services will interact with the Configuration Admin
Service and, if there's an update of the configuration with the same
PID as the service id, the component will be deactivated and
reactivated with the new configuration properties.

Now, the Configuration Admin Service is able to push configuration changes
directly to the component using the Managed Service interface. This behavior,
however, cannot be combined with the Declarative Services, and on configuration
changes, the component will be de- and reactivated regardless.

I would need the SCR to detect the fact that a ManagedService interface is
provided for the PID corresponding to the service id (although that should
probably be implicit for the sake of simplicity, if it isn't defined), and NOT
deactivate the component in this case, but let it handle the update at
run-time.

It's not 100% clear to me if this requires changes to the configuration admin
service, but I suppose that the SCR could probably insert itself as a
middleware, not exposing the service from the component directly, and just
forwarding requests whenever the component is active.
------- Comment #1 From BJ Hargrave 2008-09-17 16:45:02 UTC [reply] ------- 
CPEG mtg: We add a modified attribute. If specified component will be called at
that method before the service properties are updated. modified method will
take same args as activate.