Methods to interact with the repository layer to persist/read/update/delete the information.

cm-data-subscriptions

Service layer to interact and persist to DB
1. perist the new subscription
2. retrieve subscription for given subscription-ids
3. retrieve subscription for given cmhandle-ids
4. update an ongoing subscription
5. remove subscription-id from the given list of cmhandles
6. subscriptions for a given xpath
7. add xpath for ongoing subscription
8. do we have ongoing subscription for given subscription-id?

a/c

• java interface and implementation. CmSubscriptionService and CmSubscriptionServiceImpl
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