PTP Status Notifications API Definition v2

This document defines how a hosted application can subscribe to receive PTP status notifications from the StarlingX platform and also how to pull notifications on demand.

The interaction between the application and the platform is done with the use of a Sidecar residing in the same pod.

The port of the Sidecar is exposed to the application by a downward API and the address is the localhost of the pod where the application and the Sidecar are running on. For example: http://127.0.0.1:{port}

The version 2 of the API is documented in the O-RAN Working Group 6 O-Cloud Notification API specification for Event Consumers v03.00. Refer to https://www.o-ran.org/specifications for O-RAN specifications.

Create Subscription

As the result of successfully executing this method, a new subscription resource will be created and a variable value (subscriptionId) will be used for representing this resource. An initial PTP notification will be triggered, showing the initial status of the PTP resource followed by PTP status notifications if there is a change to the PTP status.

POST
/ocloudNotifications/v2/subscriptions

Subscribe to receiving PTP status notifications

Normal response codes

201

Error response codes

badRequest (400), itemNotFound (404), conflict(409)

Request parameters

Parameter

Style

Type

Description

ResourceAddress

plain

xsd:string

Specifies a hierarchical path which consists of the resource. Only the current cluster and node is supported.

EndpointUri

plain

xsd:string

Endpoint URI (a.k.a callback URI), e.g. http://127.0.0.1:9090/resourcestatus/ptp

Response parameters

Parameter

Style

Type

Description

SubscriptionId

plain

csapi:UUID

Identifier for the created subscription resource.

ResourceAddress

plain

xsd:string

Specifies a hierarchical path which consists of the resource. Only the current cluster and node is supported.

UriLocation

plain

xsd:string

The URI location to query the subscription resource created.

EndpointUri

plain

xsd:string

Endpoint URI (a.k.a callback URI), e.g. http://127.0.0.1:9090/resourcestatus/ptp

 
{
    "EndpointUri": "http://127.0.0.1:9090/v2/resource_status/ptp",
    "ResourceAddress": "/./controller-0/sync/gnss-status/gnss-sync-status",
    "SubscriptionId": "704f21a0-19a3-11ed-854c-8a6cf180560d",
    "UriLocation": "http://127.0.0.1:8080/ocloudNotifications/v2/subscriptions/704f21a0-19a3-11ed-854c-8a6cf180560d"
}

{
    "EndpointUri": "http://127.0.0.1:9090/v2/resource_status/ptp",
    "ResourceAddress": "/./controller-0/sync",
    "SubscriptionId": "dcdae0de-19a3-11ed-854c-8a6cf180560d",
    "UriLocation": "http://127.0.0.1:8080/ocloudNotifications/v2/subscriptions/dcdae0de-19a3-11ed-854c-8a6cf180560d"
}

{
    "EndpointUri": "http://127.0.0.1:9090/v2/resource_status/ptp",
    "ResourceAddress": "/./controller-0/sync/sync-status/sync-state",
    "SubscriptionId": "ca244f8a-1fec-11ed-854c-8a6cf180560d",
    "UriLocation": "http://127.0.0.1:8080/ocloudNotifications/v2/subscriptions/ca244f8a-1fec-11ed-854c-8a6cf180560d"
}

{
    "EndpointUri": "http://127.0.0.1:9090/v2/resource_status/ptp",
    "ResourceAddress": "/./controller-0/sync/sync-status/os-clock-sync-state",
    "SubscriptionId": "8ded8d18-1fee-11ed-854c-8a6cf180560d",
    "UriLocation": "http://127.0.0.1:8080/ocloudNotifications/v2/subscriptions/8ded8d18-1fee-11ed-854c-8a6cf180560d"
}

Manage Subscriptions

GET
/ocloudNotifications/v2/subscriptions

Query subscription resources

Normal response codes

200

Error response codes

itemNotFound (404)

Response parameters

Parameter

Style

Type

Description

SubscriptionId

plain

csapi:UUID

Identifier for the created subscription resource.

ResourceAddress

plain

xsd:string

Specifies a hierarchical path which consists of the resource. Only the current cluster and node is supported.

UriLocation

plain

xsd:string

The URI location to query the subscription resource created.

EndpointUri

plain

xsd:string

Endpoint URI (a.k.a callback URI), e.g. http://127.0.0.1:9090/resourcestatus/ptp

 
{
    "EndpointUri": "http://127.0.0.1:9090/v2/resource_status/ptp",
    "ResourceAddress": "/./controller-0/sync/gnss-status/gnss-sync-status",
    "SubscriptionId": "704f21a0-19a3-11ed-854c-8a6cf180560d",
    "UriLocation": "http://127.0.0.1:8080/ocloudNotifications/v2/subscriptions/704f21a0-19a3-11ed-854c-8a6cf180560d"
}

{
    "EndpointUri": "http://127.0.0.1:9090/v2/resource_status/ptp",
    "ResourceAddress": "/./controller-0/sync/sync-status/sync-state",
    "SubscriptionId": "ca244f8a-1fec-11ed-854c-8a6cf180560d",
    "UriLocation": "http://127.0.0.1:8080/ocloudNotifications/v2/subscriptions/ca244f8a-1fec-11ed-854c-8a6cf180560d"
}

This operation does not accept a request body.

GET
/ocloudNotifications/v2/{SubscriptionId}

Query individual subscription resource

Normal response codes

200

Error response codes

itemNotFound (404)

Request parameters

Parameter

Style

Type

Description

SubscriptionId

plain

csapi:UUID

Identifier for the created subscription resource.

Response parameters

Parameter

Style

Type

Description

SubscriptionId

plain

csapi:UUID

Identifier for the created subscription resource.

ResourceAddress

plain

xsd:string

Specifies a hierarchical path which consists of the resource. Only the current cluster and node is supported.

UriLocation

plain

xsd:string

The URI location to query the subscription resource created.

EndpointUri

plain

xsd:string

Endpoint URI (a.k.a callback URI), e.g. http://127.0.0.1:9090/resourcestatus/ptp

 
{
    "EndpointUri": "http://127.0.0.1:9090/v2/resource_status/ptp",
    "ResourceAddress": "/./controller-0/sync/sync-status/os-clock-sync-state",
    "SubscriptionId": "8ded8d18-1fee-11ed-854c-8a6cf180560d",
    "UriLocation": "http://127.0.0.1:8080/ocloudNotifications/v2/subscriptions/8ded8d18-1fee-11ed-854c-8a6cf180560d"
}

This operation does not accept a request body

DELETE
/ocloudNotifications/v2/{SubscriptionId}

Delete individual subscription resource

Normal response codes

204

Error response codes

itemNotFound (404)

Request parameters

Parameter

Style

Type

Description

SubscriptionId

plain

csapi:UUID

Identifier for the created subscription resource.

This operation does not accept a request body.

Pull Status Notifications

GET
/ocloudNotifications/v2/{ResourceAddress}/CurrentState

Pull PTP status notifications

Normal response codes

200

Error response codes

itemNotFound (404)

Request parameters

Parameter

Style

Type

Description

ResourceAddress

plain

xsd:string

Specifies a hierarchical path which consists of the resource. Only the current cluster and node is supported. PTP instance name is supported.

This operation does not accept a request body. Response parameters

Parameter

Style

Type

Description

id

plain

xsd:string

Identifies the event.

specversion

plain

xsd:string

The version of the CloudEvents specification which the event uses. This enables the interpretation of the context.

source

plain

xsd:string

Identifies the context in which an event happened.

type

plain

xsd:string

This attribute contains a value describing the type of event related to the originating occurrence.

time

plain

xsd:string

Time at which the event occurred.

data

plain

xsd:string

Array of JSON objects defining the information for the event

version

plain

xsd:string

Version of the Notification API Schema generating the event.

values

plain

xsd:string

A JSON array of values defining the event.

data_type

plain

xsd:string

Type of value object. (notification | metric)

ResourceAddress

plain

xsd:string

Specifies a hierarchical path which consists of the resource. Only the current cluster and node is supported.

value_type

plain

xsd:string

The type format of the value property (enumeration or metric)

value

plain

xsd:string

String representation of value in value_type format

 
{
    "id": "d38af5a6-70bb-4b3d-892a-df50cf2fdb09",
    "specversion": "1.0",
    "source": "/sync/sync-status/sync-state",
    "type": "event.sync.sync-status.synchronization-state-change",
    "time": "2022-08-12T19:20:54896244Z",
    "data": {
      "version": "1.0",
      "values": [
         {
            "data_type": "notification",
            "ResourceAddress": "/././sync/sync-status/sync-state",
            "value_type": "enumeration",
            "value": "LOCKED"
         }
      ]
   }
}

{
   "ptp-inst1": {
      "id": "0088ea9e-ba57-409c-bfcb-8163e5c39c70",
      "specversion": "1.0",
      "source": "/sync/ptp-status/clock-class",
      "type": "event.sync.ptp-status.ptp-clock-class-change",
      "time": "2022-09-09T15:57:40078935Z",
      "data": {
         "version": "1.0",
         "values": [
            {
               "data_type": "metric",
               "ResourceAddress": "/././sync/ptp-status/clock-class",
               "value_type": "metric",
               "value": "6"
            }
         ]
      }
   }
}

{
   "ptp-inst1": {
      "id": "ee37956c-5fed-4414-abce-d8de44fa6718",
      "specversion": "1.0",
      "source": "/sync/ptp-status/lock-state",
      "type": "event.sync.ptp-status.ptp-state-change",
      "time": "2022-09-09T15:57:40078919Z",
      "data": {
         "version": "1.0",
         "values": [
            {
               "data_type": "notification",
               "ResourceAddress": "/././sync/ptp-status/lock-state",
               "value_type": "enumeration",
               "value": "LOCKED"
            }
         ]
      }
   }
}

{
   "os_clock_status": {
      "id": "404631ea-8011-4dd1-bd46-cf97ddc1d6d0",
      "specversion": "1.0",
      "source": "/sync/sync-status/os-clock-sync-state",
      "type": "event.sync.sync-status.os-clock-sync-state-change",
      "time": "2022-09-09T15:57:46020908Z",
      "data": {
         "version": "1.0",
         "values": [
            {
               "data_type": "notification",
               "ResourceAddress": "/././sync/sync-status/os-clock-sync-state",
               "value_type": "enumeration",
               "value": "LOCKED"
            }
         ]
      }
   }
}

{
   "overall_sync_status": {
      "id": "a7139f82-0a13-4c33-b7b5-b4773def1377",
      "specversion": "1.0",
      "source": "/sync/sync-status/sync-state",
      "type": "event.sync.sync-status.synchronization-state-change",
      "time": "2022-09-09T15:57:46034060Z",
      "data": {
         "version": "1.0",
         "values": [
            {
               "data_type": "notification",
               "ResourceAddress": "/././sync/sync-status/sync-state",
               "value_type": "enumeration",
               "value": "LOCKED"
            }
         ]
      }
   }
}

{
   "ts1": {
      "id": "230f4f09-d5ba-4c82-966b-52f7f3c22e14",
      "specversion": "1.0",
      "source": "/sync/gnss-status/gnss-sync-status",
      "type": "event.sync.gnss-status.gnss-state-change",
      "time": "2022-09-12T14:31:45519571Z",
      "data": {
         "version": "1.0",
         "values": [
            {
               "data_type": "notification",
               "ResourceAddress": "/././sync/gnss-status/gnss-sync-status",
               "value_type": "enumeration",
               "value": "LOCKED"
            }
         ]
      }
   }
}

This operation does not accept a request body.

Push Notifications

After a successful subscription (a subscription resource was created) the application (e.g. vDU) will be able to receive PTP status notifications. Note that notifications are sent to the application when there is a change to the PTP synchronization state.

The notification will be sent to the endpoint reference (EndpointUri) provided by the application during the creation of the subscription resource. StarlingX platform includes the notification data in the payload body of the POST request to the application’s EndpointURI (http://127.0.0.1:{port}/{path}).

POST
{CallbackUri}

Send PTP status notifications to the application subscribed

Normal response codes

204

Error response codes

badRequest (400), itemNotFound (404), tiemout(408)

Request parameters

Parameter

Style

Type

Description

id

plain

xsd:string

Identifies the event.

specversion

plain

xsd:string

The version of the CloudEvents specification which the event uses. This enables the interpretation of the context.

source

plain

xsd:string

Identifies the context in which an event happened.

type

plain

xsd:string

This attribute contains a value describing the type of event related to the originating occurrence.

time

plain

xsd:string

Time at which the event occurred.

data

plain

xsd:string

Array of JSON objects defining the information for the event.

version

plain

xsd:string

Version of the Notification API Schema generating the event.

values

plain

xsd:string

A JSON array of values defining the event.

data_type

plain

xsd:string

Type of value object. (notification | metric)

ResourceAddress

plain

xsd:string

Specifies a hierarchical path which consists of the resource. Only the current cluster and node is supported.

value_type

plain

xsd:string

The type format of the value property (enumeration or metric)

value

plain

xsd:string

String representation of value in value_type format.

 
{
    "id": "d38af5a6-70bb-4b3d-892a-df50cf2fdb09",
    "specversion": "1.0",
    "source": "/sync/sync-status/sync-state",
    "type": "event.sync.sync-status.synchronization-state-change",
    "time": "2022-08-12T19:20:54896244Z",
    "data": {
      "version": "1.0",
      "values": [
         {
            "data_type": "notification",
            "ResourceAddress": "/././sync/sync-status/sync-state",
            "value_type": "enumeration",
            "value": "HOLDOVER"
         }
      ]
   }
}