Terminate NS Backend Service

Supports the Terminate NS backend operations and workflows which do the following sequence:

<Terminate NS: note: the following workflow is a template, and it can be enhanced as needed.>

• Supports SOL005-compliant TerminateNSRequest request and parameters
• • Only support for the immediate Terminate request; i.e., terminateTime field is empty.
  • Creates BPMN workflows and business logic for the following Terminate NS operations
    • Supports input parameter handling
      • Initialize Parameters: Get an ns_inst_d, job_id and request_data from the parameters
        • set terminate_type, terminate_timeout from request_data 
        • set job_id, ns_inst_id
        • set occ_id by creating a record in NsLcmOpOccModel DB
    • Checks if the NS instance already exists
      • if there no matching NS instance from the NFVO_NSINT database table, consider there is nothing to terminate, and return (not an error, but log that there is no matching NS instance)
    • Sets Job Status to Starting: set job status as "Starting terminate..."
    • Updates the NFVO_NSINST database table with the status = TERMINATING
    • Cancels VNF list (through SOL003 Adapter)
      • Gets a VNF instance list from the NFVO_NFINST
        • for each vnf inst
          • delete_vnf (nf_instid)
            • POST /api/nslcm/v1/ns/terminateVnf/{instId} to the SOL003 Adapter
      • For the Terminate VNF internal request, the SOL003 Adapter will invoke both Terminate and Delete VNF operations
    • Cancels VL list (through MultiCloud Adapter)
      • Follow the Delete VLs user story; pass the VL list
    • Modifies the NFVO_NSINST database table, status = NOT_INSTANTIATED
    • Sets job status = NS terminate ends
    • Updates NsLcmOpOCC to COMPLETED
    • note: Send nsLcmOperationOccurrenceNotification
      • Note: this notification will be handled by a separate notification and subscription user story.