Service Creation - Flowchart diagram (in R6)

Step No

Functionality

1a

Upon reception of L1 service creation request from UUI, CreateCustomE2EServiceInstance workflow to be invoked.

• Validate the mandatory fields in service request.
• The mandatory fields are uni/enni ids, globalSubscriberId, serviceInvariantUuid etc... etc

1b

• Generate an operationId for the service request.
• Update requestDB with new entry for this service operation in operation_status table.

1c

• Based on if request validation is success/failure, send success/failure sync response to UUI with respective valid message.

• If request validation is failure, then go to initial state.
• If request validation is success, then invoke the existing subprocess flow named “DoCreateE2EServiceInstance” to process the request further

2a

• Get the request parameters to prepare for service decomposition and create service instance in AAI
• Required request parameters are requestId, globalSubscriberId, serviceType, serviceInstanceId, serviecInstanceName, serviecInvarientUuid, serviceUuid etc...

2b

• Get and set the request parameters required to process service decomposition.
• The required request paramaters are serviceModelInvarientId, serviceModelUuid and modelVersion.

2c

• Invoke workflow named “DecomposeService” to process the service decomposition.

3a

• Get and set the request parameters required to query catalog DB for service-recipe.
• Query the CatalogDB for the service recipe required for service decomposition using either serviceModelInvarientId or serviceModelUuid.

3b

• Decompose the service template and get the service resources such as UNI_UNI, UNI-ENNI etc. 
• Post service decomposition, SO to store the decomposed service in ServiceDecomposition class for further process. 

2d

• Check if service decomposition is success or failure

2e

• If success, create L1 Access service instance in AAI with orchestration-status “PENDING”

If failure, then:

• Update operation-status table with result = FAILED in RequestDB.
• Delete L1 Access-service instance entry in AAI.
• Send response to UUI with valid message(Resources are not available/invalid).

2g

• Query orchestration URI for decomposed service resource from catalog DB table vnf_recipe: CreateSDNCNetworkResource

4a

If modelType is UNI and serviceType is MDONS_OTN:

• Map request parameters from UUI to the template attributes.
• Create the request format to be sent to SDNC using template parameters and UUI inputs.
• Send the request to SDNC Adapter.

5a

If serviceType is MDONS_OTN, send the request from SDNC adapter to SDNC by invoking the opticalservice:optical-service-create RPC in SDNC

Get the SDNC response in SDNC adapter and pass it on to the calling BPMN flow.

Upon reception of SDNC response, SO to:

• Check the response code for success/failure
• If failure, invoke the failure handling flow
• If success, check for ack-final-indicator value

• If ack-final-indicator="Y", then Update requestDB with operation status of the request for which response came from SDNC.
• Update orchestration status for L1 Access-Service instance in AAI.
• Send response to UUI with valid message.

• If the flag ack-final-indicator =N in SDNC response, then: Wait for async response from SDNC with timer.

• Upon reception of async response from SDNC within timeout, process in the same way as 4b, 4c and 4d

Upon reception of no SDNC response within timeout, SO to:

• Consider it as failure case.
• Invoke the failure handling flow

6a

Upon reception of failure response, SO to invoke Rollback workflow- DoCreateServiceInstanceRollback

• Get the parameters to process the rollback.
• Here parameters to be checked are flags such as - skipRollback, RollbackSDNC, serviceType and RollbackAAI

If skipRollback=No, then:

• check if SDNC needed rollback.
• If RollbackSDNC = Yes, then execute the SDNC rollback flow.

• If RollbackSDNC= No, then , Verify if the flag RollbackAAI =Yes.

• If Yes, then delete the service instance entry in AAI.

• Post process the result and send response to ExternalAPI with valid message.