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Overview

  • By each LCM state change the related notification is sent to user to notify about the state change
  • When an cm handle is registered it will be in ADVISED state and data-sync will be set to false by a module-sync watchdog
  • If the user wants to the data-sync it has to enable it on its dedicated API endpoint
  • Only the handles with enabled data-sync will be picked up by a data-sync watchdog
  • If there's handles to be deleted during Update than their states will set to DELETING before the deletion happens after it to DELETED
  • If a data-sync watchdog starts to working with a Handle than it changes its state to READY or LOCKED whether data-sync succeeded

Diagram of the possible transactions between CM-Handle states

CPS-799 Spike: Define states and state handling for CM handle

Notification details

Notification handling in code

draw.io

Diagram attachment access error: cannot display diagram

The Event structure of the notification

Event schema

LcmEvent Scema 
{

  "$schema": "https://json-schema.org/draft/2019-09/schema",
  "$id": "urn:cps:org.onap.ncmp.cmhandle.lcm-event:v1",

  "$ref": "#/definitions/LcmEvent",

  "definitions": {

    "Values": {
      "description": "Values that represents the state of a cmHandle",
      "type": "object",
      "properties": {
        "dataSyncEnabled":{
          "description": "Whether data sync enabled",
          "type": "boolean"
        },
        "cmHandleState": {
          "description": "State of cmHandle",
          "type": "string",
          "enum": ["ADVISED", "READY", "LOCKED", "DELETING", "DELETED"]
        },
        "cmHandleProperties": {
          "description": "cmHandle properties",
          "type": "object",
          "default": null,
          "existingJavaType": "java.util.List<java.util.Map<String,String>>",
          "additionalProperties": false
        }
      },
      "additionalProperties": false
    },

    "Event": {
      "description": "The Payload of an event",
      "type": "object",
      "properties": {
        "cmHandleId": {
          "description": "cmHandle id",
          "type": "string"
        },
        "oldValues": {
          "$ref": "#/definitions/Values"
        },
        "newValues": {
          "$ref": "#/definitions/Values"
        }
      },
      "required": [
        "cmHandleId"
      ],
      "additionalProperties": false
    },

    "LcmEvent": {
      "description": "The payload for LCM event",
      "type": "object",
      "javaType" : "org.onap.ncmp.cmhandle.event.lcm.LcmEvent",
      "properties": {
        "eventId": {
          "description": "The unique id identifying the event",
          "type": "string"
        },
        "eventCorrelationId": {
          "description": "The id identifying the event",
          "type": "string"
        },
        "eventTime": {
          "description": "The timestamp when original event occurred",
          "type": "string"
        },
        "eventSource": {
          "description": "The source of the event",
          "type": "string"
        },
        "eventType": {
          "description": "The type of the event",
          "type": "string"
        },
        "eventSchema": {
          "description": "The schema that this event adheres to",
          "type": "string"
        },
        "eventSchemaVersion": {
          "description": "The version of the schema that this event adheres to",
          "type": "string"
        },
        "event": {
          "$ref": "#/definitions/Event"
        }
      },
      "required": [
        "eventId",
        "eventCorrelationId",
        "eventTime",
        "eventSource",
        "eventType",
        "eventSchema",
        "eventSchemaVersion",
        "event"
      ],
      "additionalProperties": false
    }

  }
}


Event examples

CPS-1104 Agree LCM Event schemas

Create Event 
{
  "eventId"               : "00001",    
  "eventCorrelationId     : "cmhandle-001"      
  "eventTime"             : "2021-11-16T16:42:25-04:00",
  "eventSource"           : "org.onap.ncmp",                                 
  "eventType"             : "org.onap.ncmp.cmhandle-lcm-event.create",   
  ”eventSchema”           : “org.onap.ncmp:cmhandle-lcm-event",  
  "eventSchemaVersion"    : "1.0" 

  "event": {
         “cmHandleId” : “cmhandle-001”,
         "newValues" : {                      # include ALL cmhandle metadata attributes in newValues section
             “cmHandleState”  : “ADVISED”, 
             “dataSyncEnabled” : “TRUE”,
             “cmhandleProperties” : [
                          “someProperty-1” : “Initial property value 1”,
                          “someProperty-2” : “Initial property value 2”
                   ]
         }   
    }
}
Update Event 
{
  "eventId"                : "00001",    
  "eventCorrelationId      : "cmhandle-001"      
  "eventTime"              : "2021-11-16T16:42:25-04:00",
  "eventSource"            : "org.onap.ncmp",                                 
  "eventType"              : "org.onap.ncmp.cmhandle-lcm-event.update",   
  ”eventSchema”            : “org.onap.ncmp:cmhandle-lcm-event", 
  "eventSchemaVersion"    : "1.0"  
  
  "event": {
         “cmHandleId” : “cmhandle-001”
         "oldValues" : {
    			 “cmHandleState”  : “ADVISED”,
                 “dataSyncEnabled” : “FALSE”, 
                 “cmhandleProperties” : [
                          “someProperty-0” : “ This property will be updated”,
                          “someProperty-1” : “ This property will be deleted”,
              }
          "newValues" : {
	    	 “cmHandleState”  : “READY”,
             “dataSyncEnabled” : “TRUE”,  
             “cmhandleProperties” : [
                          “someProperty-0” : “ This property has been updated”,
                          “someProperty-2” : “ This property is newly added to the cmhandle”
                   ]
           }   
       ]
    }
}
Delete Event 
{
  "eventId"                : "00001",    
  "eventCorrelationId      : "cmhandle-001",       
  "eventTime"              : "2021-11-16T16:42:25-04:00",
  "eventSource"            : "org.onap.ncmp",                                 
  "eventType"              : "org.onap.ncmp.cmhandle-lcm-event.delete",   
  ”eventSchema”            : “org.onap.ncmp:cmhandle-lcm-event",  
  "eventSchemaVersion"    : "1.0"   
     
  "event": {
        “cmHandleId” : “cmhandle-001”    
  }
}

Typical use cases which leads to state changes and trigger notification events

State changes after new cm Handle is registered

Gliffy Macro Error

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  • Name: State change use case diagram

State changes after cm Handle update received

Gliffy Macro Error

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  • Name: Cm handle state changes after update

State changes happens during watchdog execution

State changes in watchdog

Source materials

Important links to related Spikes and Implementation proposals
(From latest to older ones)

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