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Currently, in CPS, it is only possible to create a dataspace that will hold YANG modules and allow the service to create instances of the models via anchors.

It will be advantageous to provide a function that allows the deletion of the created dataspace provided that all anchors in that dataspace have also been deleted. 

To realise 'Delete dataspace' functionality, the following must be implemented:

1. REST Endpoint in CPS-Core

2. Java API method in CPS-Service

3. Data Persistence Service

Implementation Proposal

REST layers

cpsAdmin.yml

• • Create delete function to endpoint

AdminRestController.java

• • Implement a method to delete a dataspace with a dataspace name of type String as a parameter
  • Invokes cpsAdminService
  • Returns code 404 if the dataspace given does not exist

Service layers

cpsAdminService.java

• • Create abstract method 

void deleteDataspace {String dataspaceName)

cpsAdminServiceImpl.java

• • Invokes cpsAdminPersistenceService for method deleteDataspace

Persistence layers

cpsAdminPersistenceService.java

• • Create abstract method

void deleteDataspace {String dataspaceName)

cpsAdminPersistenceServiceImpl.java

• • Invoke method dataspaceRepository.getByName(String dataspaceName) to get dataspace entity
    • Throws 'DataspaceNotFoundException' if dataspace does not exist 
  • Invoke method 'getAnchors()' to confirm that dataspace has no anchors
    • If dataspace is not empty, throw exception 'DataspaceNotEmptyException' (?)
  • Using JPA, delete dataspace

Issues