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Objective

As of current implementation in cps core, after the update operation, entire configuration is sent as Kafka Notification. we are proposing to send only changed configuration as delta report in notification. It will help to understand what configuration exactly changed for the anchor. 

Issues & Decisions

#IssueNotesDecision
1Do we need to update existing update notification to send delta notification or delta notification along with existing notification. 





Event Schema

For delta notification we can use the existing cps data update event schema (cps-data-update-event-schema.json). 

#

1idUUID of the event
2source
urn:cps:org.onap.cps
3schema
urn:cps:org.onap.cps:data-updated-event-schema:v1
4type
org.onap.cps.data-updated-delta-event
5content
{
"operation": "UPDATE",
"anchorName": "Anchor1",
"dataspaceName": "dataspace1",
"schemaSetName": "schemaset1",
"observedTimestamp": timestamp,
"data":
json data 
[
  {
    "action": "ADD",
    "xpath": "/bookstore/categories/[@code=3]",
    "payload": {
      "code": 3,
      "name": "kidz"
    }
  },
  {
    "action": "DELETE",
    "xpath": "/bookstore/categories/[@code=1]",
    "payload": {
      "code": 1,
      "name": "Fiction"
    }
  },
  {
    "action": "UPDATE",
    "xpath": "/bookstore/categories/[@code=2]",
    "payload": {
      "name": "Comic"
    }
  }
]
}
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