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Create 'bulk' version for org.onap.cps.ncmp.rest.controller.NetworkCmProxyController#getResourceDataForCmHandle to support multiple cm-handles (~ multiple anchors in in CPS-Core)

...

#	Assumption	Notes
1	Proprietary options or not in the scope of this analysis.	agreed 08 Mar 2023 with kieran mccarthy ; these are optional parameters (name-value pairs) not interpreted by NCMP but can be interpreted by proprietary plugins In the future "scope" might become standardized instead of proprietary but that wil be achieved through a separate requirement
2	same xpath (resourceIdentifierInQuery) for all cm handles or different for each cm handle	agreed 08 Mar 2023 with kieran mccarthy ; if different resources are required on the same cm-handle the client wil send another (batch) request
3	options, resourceIdentifier is optional for bulk operations. operation, datastore and cmhandleIds are mandatory fields	agreed 24 Apr 2023 with CPS team.
4	We are not merging any duplicate cm handles while sending request to dmi-plugin	agreed 24 Apr 2023
5	Get batch operation does not support includeDescendants as it is impl. for pass through datastore only ncmp-datastore:passthrough-running and ncmp-datastore:passthrough-operational	agreed on 15 May 2023

Issues & Decisions

#

Issue

Notes

Decision

1

Which operation(s) need support for multiple cm handles?

Get
Create
Update (Put)
Patch
Delete

if many what is the priority?

agreed 08 Mar 2023 with kieran mccarthy

Only Get (read)

(in future other operations might be support batch option too)

2

Which datasources should be supported?

Do we need to support passthrough-only no-cached() data only ?
(maybe just start with that, support cached data bulk request later)

agreed 08 Mar 2023 with kieran mccarthy :

all passthrough datastores will be supported

Not implemented (yet) response, for non passthrough datastores

3

URL pattern for NCMP bulk endpoints

~~08 Mar 2023~~

~~Existing : /v1/ch/{cm-handle}/data/ds/{datastore-name}~~

~~CPS Proposed : /v1/batch/data/ds/{datastore-name}~~

~~( include cm handles into payload / body and leave datastore into url)~~

~~-----------------------------------------------------------------------------------------------------------------------~~

~~17 Apr 2023 Meeting : kafka message schema & batch interface extension~~

~~POST http://localhost:8080/ncmp/v1/batch/data&topic=my-topic-name~~

{
operations: [
{
operation: read,
datastore: "...",
options: "...",
resourceIdentifier: "...",
cmhandleIds: [4, 6]
},
{
operation: read,
datastore: "...",
options: "...",
resourceIdentifier: "...",
cmhandleIds: [1, 2, 3]
}
]
}

~~23 May 2023~~

~~POST http://localhost:8080/ncmp/v1/data&topic=my-topic-name~~

~~agreed~~ 08 Mar 2023 ~~with kieran mccarthy : Follow the existing interfaces as much as possible for consistency and efficiency~~

------------------------------------------------------------------------------------------------------------

23 May 2023 kieran mccarthy

We had an internal review with some of our rApp colleagues around some of the recent proposed NCMP batch interface and they came back with some valid comment.

The proposal is that we should not distinguish batch from bulk or other flavours of read/write.

The aim is to only have a single flavour of interface for read or write for clients. Therefore the proposal is to drop “batch” from the interface URL and just act toward “data” (reads/writes/actions)

Before	After
~~POST http://localhost:8080/ncmp/v1/batch/data&topic=my-topic-name~~	POST http://localhost:8080/ncmp/v1/data&topic=my-topic-name

4

keep datastore, topic and optional parameters in the URL itself instead into body.

CPS prefers keep interface similar as single cm handle interface (consistency and cost)

Existing : ...&topic=topicParamInQuery

agreed 08 Mar 2023 with kieran mccarthy : Follow the existing interfaces as much as possible for consistency and efficiency

5

support in ONAP DMI-plugin

agreed 08 Mar 2023 with Toine Siebelink : ONAP plugin can respond with not implemented yet code,

6

Response always Async ie. topic is compulsory ?

Assume topic is compulsory (defined in OPenApi) → Response therefore wil be 400 if not supplied

Agreed 08 Mar 2023 with kieran mccarthy :

Topic is optional but system will respond with 'Not implemented (yet when not specified or blank

7

Should NCMP Amalgamate Async responses from DMI-Plugin before forwarding ?

step 6 in flow diagram

Agreed 08 Mar 2023 with kieran mccarthy : NCMP wil only forward to client topic no handling tracking or any responses or status of request

8

Handle non responding dmi-plugin

Agreed 08 Mar 2023 with kieran mccarthy :
No response for 4b then send an error response to the topic given by client

9

Should (can) NCMP check if 'MyTopic' specified by client exist

Consider Access Control too. For now NCMP can log error. Client is responsible for topic setup

Agreed 08 Mar 2023 with kieran mccarthy :
NCMP can log error when forward to 'client topic' Security not in scope (yet)

10

How to handle non-existing CM-Handles (id)

Suggestions

Silently ignore
(initial) error response
1. should we combine all errors in one message?

Agreed 08 Mar 2023 with kieran mccarthy :

Additional error (messages) response with all cm-handles that cannot be resolved, also a separate error message wil be sent for each failed DMI

11

Overlap/clash with Deutsche Telekom user story:

Jira Legacy

server	System Jira
serverId	4733707d-2057-3a0f-ae5e-4fd8aff50176
key	CPS-1377

?!

08 Mar 2023 discussed in weekly ONAP meeting the DT user story is affect CPS-Core interface (not NCMP) and the requirement is to execute a query over ALL cm-handles (cached only?!) instead of a given list of cm-handles (~anchors)

12

Schema of bulk response

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serverId	4733707d-2057-3a0f-ae5e-4fd8aff50176
key	CPS-1556

1) Agreement required on the structure of the response. Please see response structure below.
2) Does 'eventTime' field which holds the timestamp of the bulk response event, required or can it be dropped?

Code Block

title	Batch Event Headers Schema
collapse	true

{
  "$schema": "https://json-schema.org/draft/2019-09/schema",
  "$id": "urn:cps:org.onap.cps.ncmp.events.async:batch-event-headers:1.0.0",
  "$ref": "#/definitions/BatchEventHeaders",
  "definitions": {
    "BatchEventHeaders": {
      "description": "The header information of the Batch event.",
      "type": "object",
      "javaType" : "org.onap.cps.ncmp.events.async.v1.BatchEventHeaders",
      "properties": {
        "eventId": {
          "description": "The unique id for identifying the event.",
          "type": "string"
        },
        "eventCorrelationId": {
          "description": "The request id received by NCMP as an acknowledgement.",
          "type": "string"
        },
        "eventTime": {
          "description": "The time of the event. It should be in RFC format ('yyyy-MM-		     dd'T'HH:mm:ss.SSSZ').",
          "type": "string"
        },
        "eventTarget": {
          "description": "The destination topic to forward the consumed event.",
          "type": "string"
        },
        "eventSource": {
          "description": "The source of the event.",
          "type": "string"
        },
        "eventType": {
          "description": "The type of the Batch event.",
          "type": "string"
        },
        "eventSchema": {
          "description": "The schema of the Batch event payload.",
          "type": "string"
        },
        "eventSchemaVersion": {
          "description": "The schema version of the Batch event payload.",
          "type": "string"
        }
      },
      "required": [
        "eventId",
        "eventCorrelationId",
        "eventTarget",
        "eventType",
        "eventSchema",
        "eventSchemaVersion"
      ],
      "additionalProperties": false
    }
  }
}

Code Block

title	Sample Batch Event Headers
collapse	true

{
  "eventId":            "4cb32729-85e3-44d1-aa6e-c923b9b059a5",
  "eventCorrelationId": "68f15800-8ed4-4bae-9e53-27a9e03e1911",
  "eventTime":          "2023-03-28T14:29:23.876+0000",
  "eventTarget":        "client-topic"
  "eventSource":        "dmi-plugin:enm-1"(dmi service name)
  "eventType":          "org.onap.cps.ncmp.event.model.BulkResponseEvent",
  "eventSchema":        "urn:cps:org.onap.cps.ncmp.events.async:batch-event-schema:1.0.0",
  "schemaVersion":      "1.0.0",

}

Code Block

title	Batch Event Payload Schema
collapse	true

{
  "$schema": "https://json-schema.org/draft/2019-09/schema",
  "$id": "urn:cps:org.onap.cps.ncmp.events.async:batch-event-schema:1.0.0",
  "$ref": "#/definitions/BatchDataResponseEvent",
  "definitions": {
    "BatchDataResponseEvent": {
      "description": "The payload of batch event.",
      "type": "object",
      "javaType" : "org.onap.cps.ncmp.events.async.v1.BatchEvent",
      "properties": {
        "event": {
          "description": "The content of Batch event.",
          "type": "object",
          "existingJavaType": "java.lang.Object",
          "additionalProperties": false
        }
      },
      "required": [
        "event"
      ],
      "additionalProperties": false
    }
  }
}

Code Block

title	Sample Batch Event Payload
collapse	true

{     
  "event": {
     "payload": "response of batch cm handles"
  } 
}

Need to follow schema structure there in #15 under Issues & Decisions section and it is agreed on 11 May 2023

13

~~Schema for Bulk Response event forwarding to client specified topic~~

CPS-1557 - NCMP : forward bulk response messages to client topic

~~Not keeping the 'eventTarget' which comes from the (BulkResponseEvent(In progress of the structure agreement)).~~

~~Note: Will consider 'eventTarget', If it finalized the schema from~~

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serverId	4733707d-2057-3a0f-ae5e-4fd8aff50176
key	CPS-1556

Agreed on 11 May 2023 to keep one schema for both events (DMI → NCMP) and (NCMP → ClientApps)

14

How NCMP would forward response? (Response data : ref. message flow #6)

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serverId	4733707d-2057-3a0f-ae5e-4fd8aff50176
key	CPS-1556

1. Do we need to send only one response containing all the requested cm handles ?
2. Send single response for each cm handle?
3. Single response message per DMI plugin?

kieran mccarthy - Please share your inputs on the above listed questions.

15

Message format for the batch interface

some non-standard headers wil need to be implemented as 'extensions' and names to be confirmed

correlationid
target

23 May 2023 kieran mccarthy

We have had some internal discussions including with some O-RAN standards representatives and one of the outcomes is that it would be good if we aligned with the some community standards for event header definitions. IT is proposed (initially from AT&T) that we should follow Cloud Native Computing Foundation (CNCF) specification as defined in their cloudevents incubator project.
More details see CPS Events Structure#CNCFCloudEventalignment

16

NCMP wil send only one request to each DMI

Code Block

language	bash
title	NCMP batch endpoint
collapse	true

curl --location 'http: //localhost:8080/ncmp/v1/data?topic=my-topic-name' \
--header 'Content-Type: application/json' \
--header 'Authorization: Basic Y3BzdXNlcjpjcHNyMGNrcyE=' \
--data '{
    "operations": [
        {
            "operation": "read",
            "operationId": "12",
            "datastore": "ncmp-datastore:passthrough-operational",
            "options": "(fields=schemas/schema)",
            "resourceIdentifier": "parent/child",
            "targetIds": [
                "836bb62201f34a7aa056a47bd95a81ed",
                "202acb75b4a54e43bb1ff8c0c17a8e08"
            ]
        },
        {
            "operation": "read",
            "operationId": "14",
            "datastore": "ncmp-datastore:passthrough-running",
            "targetIds": [
                "ec2e9495679a43c58659c07d87025e72",
                "0df4d39af6514d99b816758148389cfd"
            ]
        }
    ]
}'

Code Block

language	bash
title	NCMP batch endpoint response (200->OK)
collapse	true

{
    "requestId": "4753fc1f-7de2-449a-b306-a6204b5370b3"
}

Code Block

language	bash
title	DMI service batch endpoint
collapse	true

DMI Service 1 (POST): http://172.26.202.25:8783/dmi/v1/data?topic=my-topic-name&requestId=4753fc1f-7de2-449a-b306-a6204b5370b3 -> 

[
    {
        "operationType": "read",
        "operationId": "14",
        "datastore": "ncmp-datastore:passthrough-running",
        "cmHandles": [
            {
                "id": "ec2e9495679a43c58659c07d87025e72",
                "cmHandleProperties": {
                    "neType": "RadioNode"
                }
            },
            {
                "id": "0df4d39af6514d99b816758148389cfd",
                "cmHandleProperties": {
                    "neType": "RadioNode"
                }
            }
        ]
    }
]

DMI Service 2 (POST) : http://172.26.202.26:8783/dmi/v1/data?topic=my-topic-name&requestId=4753fc1f-7de2-449a-b306-a6204b5370b3 -> 

   [
    {
        "operationType": "read",
        "operationId": "12",
        "datastore": "ncmp-datastore:passthrough-operational",
        "options": "(fields=schemas/schema)",
        "resourceIdentifier": "parent/child",
        "cmHandles": [
            {
                "id": "836bb62201f34a7aa056a47bd95a81ed",
                "cmHandleProperties": {
                    "neType": "RadioNode"
                }
            },
            {
                "id": "202acb75b4a54e43bb1ff8c0c17a8e08",
                "cmHandleProperties": {
                    "neType": "RadioNode"
                }
            }
        ]
    }
]

Agreed 11 May 2023 with Csaba Kocsis and kieran mccarthy

requestId would be send as a path param from NCMP to DMI-plugin.

Example

NCMP batch endpoint : http://localhost:8080/ncmp/v1/data?&topic=my-topic-name

DMI-Plugin batch endpoint : http://172.26.202.25:8783/dmi/v1/data?topic=my-topic-name&requestId=e6fa4d26-4dc1-4877-aa3c-45e99f840708

Mandatory Fileds :
- - "operation": "read"
  - "operationId": "12"
    "datastore": "ncmp-datastore:passthrough-operational"
  - "targetIds": [ "0df4d39af6514d99b816758148389cfd", "ec2e9495679a43c58659c07d87025e72" ]

Optional Fields :
- - "options": "(fields=schemas/schema)"
  - "resourceIdentifier": "parent/child"

17

Feature Name (events, URL)

event type proposal : from ~~BatchDataXXXEvent~~ to

DataOperationXXXEvent

For example : DataOperationResponseEvent

'eventType' value as below 'org.onap.cps.ncmp.events.~~Batch~~DataXXXEvent'

proposed Operation like :

'org.onap.cps.ncmp.events.DataOperationXXXEvent'

'batch' was the keyword use in the URL for this feature (now gone) but much code classes etc uses this name still...

...

Field

Type

Description

Mandatory?

Notes

event

Event

The payload of an event

Mandatory

event.responses[0, 1, 2, ...]

Array

contains an array or batch response that includes both success and failure.

Mandatory

event.responses[0].operationId

String

specified to distinguish multiple operations using same cmhandleId

Mandatory

event.responses[0].ids

String

cmhandle-ids

Mandatory

Example : ["0df4d39af6514d99b816758148389cfd"]
Note: Ids array should contain only a single element in the array in case of success messages and In case of error it can have any number of elements.

event.responses[0].status-code

String

Mandatory

Common NCMP defined error codes:

status-code 0-99 is reserved for any success response
status-code from 100 to 199 is reserved for any failed response.

event.responses[0].status-message

String

Mandatory

Examples for code & message :

status-code	status-message
1	"Successfully applied changes"
101	"cmHandle(s) do not exist"

event.responses[0].data

Object

Optional

In case of success :
- Optional, for write operations then no need to return configurations application/yang-patch+json | application/yang-data+json
In case of failure :
- Optional, any supplementary error data matching the error status-code

Implementation

Bulk Request Message Flow

...

Flow Step

Short description

Message Details

Notes

1

Bulk Get Request

Code Block

title	/v1/batch/data/ds/{datastore-name}
collapse	true

body:
["cm-1",...,"cm-n"]

Code Block

title	Example CURL cmd : curl --location --request POST
collapse	true

'http://localhost:8080/ncmp/v1/batch/data/ds/ncmp-datastore:passthrough-running?resourceIdentifier=parent/child%26options=(a=1,b=2)&topic=my-topic-name&options=(fields=schemas/schema)' \
--header 'Authorization: Basic Y3BzdXNlcjpjcHNyMGNrcyE=' \
--header 'Content-Type: application/json' \
--data '[ "40137a9771f84459affa795fa1d633ab", "f5a92ec7a7db4d6fbb0e0ce2803a86cc" ]'

Define new get operation "getResourceDataForCmHandles" into ncmp.yml

2

Ack clent Request

Code Block

title	Response 200
collapse	true

{"requestId":"123"}

3

DMI Bulk Request

Code Block

title	/v1/ch/batch/data/ds/{datastore-name}&topic=topicParamInQuery
collapse	true

body: {"Cmhandles":["cm-1",...,"cm-n"],"requestId":123}

The DMI PLugin should be told (included in request) the client topic so that NCMP does not have to 'remember' to relation between request id and client topic!

4

Ack NCMP Request

Code Block

title	Response 202
collapse	true

202 is non-committal, meaning that there is no way for the HTTP to later send an asynchronous response indicating the outcome of processing the request. It is intended for cases where another process or server handles the request, or for batch processing.

5

Kafka Messages from DMI to NCMP

Code Block

title	Batch Event Headers
collapse	true

{
  "eventId":            "4cb32729-85e3-44d1-aa6e-c923b9b059a5",
  "eventCorrelationId": "68f15800-8ed4-4bae-9e53-27a9e03e1911",
  "eventTime":          "2023-03-28T14:29:23.876+0000",
  "eventTarget":        "client-topic"
  "eventSource":        "dmi-plugin:enm-1"(dmi service name)
  "eventType":          "org.onap.cps.ncmp.event.model.BulkResponseEvent",
  "eventSchema":        "urn:cps:org.onap.cps.ncmp.events.async:batch-event-schema:1.0.0",
  "schemaVersion":      "1.0.0",

}

Code Block

title	Batch Event Payload
collapse	true

{     
  "event": {
     "payload": "response of batch cm handles"
  } 
}

6

Kafka Message(s) from NCMP to Client

Code Block

title	Batch Event Headers
collapse	true

{
  "eventId":            "4cb32729-85e3-44d1-aa6e-c923b9b059a5",
  "eventCorrelationId": "68f15800-8ed4-4bae-9e53-27a9e03e1911",
  "eventTime":          "2023-03-28T14:29:23.876+0000",
  "eventSource":        "dmi-plugin:enm-1"(dmi service name)
  "eventType":          "org.onap.cps.ncmp.event.model.BulkResponseEvent",
  "eventSchema":        "urn:cps:org.onap.cps.ncmp.events.async:batch-event-schema:1.0.0",
  "schemaVersion":      "1.0.0",

}

Code Block

title	Batch Event Payload
collapse	true

{     
  "event": {
     "payload": "response of batch cm handles"
  } 
}

7

Alternative for 4/5 → Non responding DMI. NCMP will have to create error message detailing cm-handles

See decision # 8 and 9

8

Response message structure ? (Flow no. 5)

Non responding DMI-plugin

Code Block

title	Non responding DMI-plugin
collapse	true

{
  "timestamp":"2023-03-01T23:00:00.345-0400", 
  "requestId":123,
  "error": "DMI Service Unavailable, {service-name}",
  "Cmhandles":["cm-1",...,"cm-n"]
  }

9

Response message structure ? (Flow no. 5)

Non existing cm handles

Code Block

title	Non existing cm handles
collapse	true

{
	"timestamp":"2023-03-01T23:00:00.345-0400",
    "requestId":123,
	"error":"Cm-Handle not found",
	"Cmhandles":["cm-1",...,"cm-n"]
}

10

Non Ready cm handles

Code Block

title	Non READY existing cm handles
collapse	true

{
	"timestamp":"2023-03-01T23:00:00.345-0400",
    "requestId":123,
	"error":"Cm-Handle not in READY state.",
	"Cmhandles":["cm-1",...,"cm-n"]
}

11

URL pattern for DMI-Plugin bulk endpoints

Existing DMI endpoints are :

/v1/ch/{cmHandle}/data/ds/{datastore-name}

datastore-name:

ncmp-datastore:passthrough-operational
ncmp-datastore:passthrough-running

...&topic=topicParamInQuery

CPS Proposed :

/v1/ch/batch/data/ds/{datastore-name}

...&topic=topicParamInQuery

cm handle ids and requestid into body

...

Priority

Component

Description

JIRAs

Estimate

Status

1

DMI, NCMP

Batch Response Event (DMI → NCMP) to Comply with Cloud Events

Jira Legacy

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columnIds	issuekey,summary,issuetype,created,updated,duedate,assignee,reporter,priority,status,resolution
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serverId	4733707d-2057-3a0f-ae5e-4fd8aff50176
key	CPS-1723

5 Days (M)

New Requirement.

2

NCMP

Batch Response Event (NCMP → Client App)

Jira Legacy

server	System Jira
columnIds	issuekey,summary,issuetype,created,updated,duedate,assignee,reporter,priority,status,resolution
columns	key,summary,type,created,updated,due,assignee,reporter,priority,status,resolution
serverId	4733707d-2057-3a0f-ae5e-4fd8aff50176
key	CPS-1724

TBD

New Requirement.

3

DMI-Plugin

Accept datastore name as param into URL

Jira Legacy

server	System Jira
serverId	4733707d-2057-3a0f-ae5e-4fd8aff50176
key	CPS-1550

5 Days

Done

4

NCMP

Expose REST endpoint to accept collection of cm handles for GET operation (Passthrough only)

Jira Legacy

server	System Jira
serverId	4733707d-2057-3a0f-ae5e-4fd8aff50176
key	CPS-1553

15 Days

Pending Doc. only

5

DMI-Plugin

Expose endpoint for ONAP not impl. and Stub impl. for testing/demo

Jira Legacy

server	System Jira
serverId	4733707d-2057-3a0f-ae5e-4fd8aff50176
key	CPS-1555

5 Days

Done

6

NCMP

NCMP: Update existing REST endpoint that accepts bulk request for GET operation

Jira Legacy

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serverId	4733707d-2057-3a0f-ae5e-4fd8aff50176
key	CPS-1635

5 Days

new because Requirements changed
+5 days

7

DMI-Plugin

DMI-Plugin : Update endpoint to accept bulk request

Jira Legacy

server	System Jira
columnIds	issuekey,summary,issuetype,created,updated,duedate,assignee,reporter,priority,status,resolution
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serverId	4733707d-2057-3a0f-ae5e-4fd8aff50176
key	CPS-1636

3 Days

new because Requirements changed

8

Stubbed DMI-Plugin

Include code to send response messages to internal kafka topic with delay

Jira Legacy

server	System Jira
serverId	4733707d-2057-3a0f-ae5e-4fd8aff50176
key	CPS-1556

10 Days

9

NCMP

Forward response messages to client given kafka topic

Jira Legacy

server	System Jira
serverId	4733707d-2057-3a0f-ae5e-4fd8aff50176
key	CPS-1557

5 Days

delayed because Schema/Headers issue

+4 daysDone

10

NCMP

Handle non-existing cm handles

Jira Legacy

server	System Jira
columnIds	issuekey,summary,issuetype,created,updated,duedate,assignee,reporter,priority,status,resolution
columns	key,summary,type,created,updated,due,assignee,reporter,priority,status,resolution
serverId	4733707d-2057-3a0f-ae5e-4fd8aff50176
key	CPS-1583

5 Days

11

NCMP

Error handling for non-ready cm handle state

Jira Legacy

server	System Jira
serverId	4733707d-2057-3a0f-ae5e-4fd8aff50176
key	CPS-1614

5 Days

12

NCMP

Handle non responding DMI-Plugin

Jira Legacy

server	System Jira
serverId	4733707d-2057-3a0f-ae5e-4fd8aff50176
key	CPS-1558

5 Days

13

CSIT test for demo

Jira Legacy

server	System Jira
serverId	4733707d-2057-3a0f-ae5e-4fd8aff50176
key	CPS-1560

5 Days

...

Versions Compared

Old Version 146

New Version 147

Key

Issues & Decisions

Implementation

Bulk Request Message Flow