Deleting entities and relationships

[Graham Wallis <gr...@uk.ibm.com>]

Hi Madhan

Could you please look at the following and tell me whether the following 
look like sensible requirements for Atlas?

To support the OMRS interface, I would like to be able to:
soft delete an entity/relationship - this can fail if Atlas is configured 
only for hard-deletes.
hard delete (purge) an entity/relationship - this is needed even when 
Atlas is configured for soft deletes.
restore (un-delete) an entity/relationship that was soft-deleted
be able to purge (hard delete) an entity/relationship that was already 
soft-deleted.
inquire whether a delete will be soft or hard (before issuing the delete) 
- I guess being able to safely inspect the configuration would b an option 
here, but an API might be better.
find out whether an entity/relationship was soft- or hard-deleted after 
the delete operation. For this I could just try to retrieve the 
entity/relationship but it would be neater to known from the return value. 
 I don't think the EntityMutationResponse includes that detail. I know the 
requestContext is updated to include the deleted entities but that seems 
to be before the delegation to either the soft or hard delete handler, so 
I suspect it cannot indicate whether the delete was ultimately soft or 
hard). I'm not sure how I would get that information that for 
relationships.

Best regards,
  Graham

Graham Wallis
IBM Analytics
Internet: graham_wallis@uk.ibm.com 
IBM Laboratories, Hursley Park, Hursley, Hampshire SO21 2JN
Tel: +44 7741 379735

Unless stated otherwise above:
IBM United Kingdom Limited - Registered in England and Wales with number 
741598. 
Registered office: PO Box 41, North Harbour, Portsmouth, Hampshire PO6 3AU