...

urn:cps:org.onap.cps

urn:cps:org.onap.cps:data-updated-event-schema:v1

org.onap.cps.data-updated-delta-event

"operation": "UPDATE",
"anchorName": "Anchor1",
"dataspaceName": "dataspace1",
"schemaSetName": "schemaset1",
"observedTimestamp": timestamp,
"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"
    }
  }
]

}

...

Delta notification can be enabled/disabled by an additional admin API for a given anchor name. New API will be added as below.

API :  PUT https://localhostIP:8333PORT/cps/api/v2/dataspace/<dataspace-name>/deltanotification

Request body:

[

{

"anchorName": "anchor01",

"subscribeDeltaNotification": true

}, 

{

"anchorName": "anchor02",

"subscribeDeltaNotification": true

}

]

Additional table to persist delta notification 

Table Name: AnchorForDeltaNotification

Implementation details

1. For data nodes update operation, generate delta report by comparing previous and current configuration after successful update. 
2.  Process data update delta event and send notification as described in event schema above.