The SDN-R Websocketmanager is a server which a client can connect to, to receive NETCONF notifications forwarded by the the devicemanagers. To get rid of all old protocol issues we redesigned all the messages.
The user scope registration
This is a full example of a registration for notifications of a specific type. In this case all problem-notification notifications of the node with the node-id node1 implemented in the microwave-model@2018-10-10.yang.
{
"data":"scopes",
"scopes":[
{
"node-id":"node1"
"schema":{
"namespace":"onf:params:xml:ns:yang:microwave-model",
"revision":"2018-10-10",
"notification":["problem-notification"]
}
}
]
}
In fact there are a lot of use cases to receive a lot of different notifications or specific notifications for a bunch of nodes, most properties are optional
| property | optional | description |
|---|---|---|
| node-id | yes | filter for notifications only from node with node-id |
| schema | yes | filter for specific notifications implemented by a model |
| schema.namespace | no | if schema is set, namespace has to be set, otherwise a schema is not valid |
| schema.revision | yes | filter for a specific revision of the implemented model |
| schema.notification | yes | filter for specific notification types of the model |
If the user scope registration succeeds you will get a response with your submitted scopes
{
"status": "success",
"scopes": [
{
"node-id":"node1"
"schema":{
"namespace":"onf:params:xml:ns:yang:microwave-model",
"revision":"2018-10-10",
"notification":["problem-notification"]
}
}
]
}
If not you will receive an error message with the cause, e.g.
{
"status": "error",
"message":"unable to parse scopes"
}
User scope registration examples
Example 1: All notifications for node-id:
{
"data":"scopes",
"scopes":[
{
"node-id":"node1"
}
]
}
Example 2: All notifications(every node) for all yang-models:
{
"data":"scopes",
"scopes":[
{
"schema":{
"namespace":"*" //no placeholder
}
}
]
}
Example 3: All notifications(every node) implemented in microwave-model:
{
"data":"scopes",
"scopes":[
{
"schema":{
"namespace":"onf:params:xml:ns:yang:microwave-model"
}
}
]
}
Example 4: All notifications(every node) of type problem-notification of microwave-model:
{
"data":"scopes",
"scopes":[
{
"schema":{
"namespace":"onf:params:xml:ns:yang:microwave-model",
"notification":["problem-notification"]
}
}
]
}
Example 5: All notifications(every node) of type problem-notification of microwave-model@2018-10-10:
{
"data":"scopes",
"scopes":[
{
"schema":{
"namespace":"onf:params:xml:ns:yang:microwave-model",
"revision":"2018-10-10",
"notification":["problem-notification"]
}
}
]
}
Example 6: All notifications for node-id of type problem-notification of microwave-model@2018-10-10:
{
"data":"scopes",
"scopes":[
{
"node-id":"node1"
"schema":{
"namespace":"onf:params:xml:ns:yang:microwave-model",
"revision":"2018-10-10",
"notification":["problem-notification"]
}
}
]
}
Notifications
A notification has the following structure
{
"event-time": "2021-03-12T05:08:55.3Z",
"type": {
"namespace":"urn:opendaylight:params:xml:ns:yang:devicemanager",
"revision":"2019-01-09",
"type":"object-creation-notification"
},
"node-id": "SDN-Controller-0",
"data": {
"object-id-ref": "sim1",
"counter": 7,
"time-stamp": "2021-03-12T05:08:55.2Z"
}
}
Properties:
| property | description |
|---|---|
| node-id | node-id which is the source the notification |
| event-time | timestamp of the notification |
| type | <namespace>@<revision>:<notification-type> |
| data | notification itself |
OSGi-Service
Inside the opendaylight container the websocketmanager does not implement a yang-generated RPC anymore. Instead ther is nor a more simplified and more generic interface to submit notifications to it.
public interface WebsocketManagerService {
/**
* Send notification via Websocket to the connected clients.
* eventTime is extracted out of notification if {@link #EventInstantAware } is implemented
* @param notification
* @param nodeId
* @param eventType
*/
void sendNotification(Notification notification, String nodeId, QName eventType);
/**
* Send notification via Websocket to the connected clients.
* @param notification
* @param nodeId
* @param eventType
* @param eventTime
*/
void sendNotification(Notification notification, String nodeId, QName eventType, DateAndTime eventTime);
/**
* Send notification via Websocket to the connected clients.
* @param notification
* @param nodeId
* @param eventType
*/
void sendNotification(DOMNotification notification, String nodeId, QName eventType);
/**
* Send notification via Websocket to the connected clients.
* @param notification
* @param nodeId
* @param eventType
* @param eventTime
*/
void sendNotification(DOMNotification notification, String nodeId, QName eventType, DateAndTime eventTime);