Method: GET_USER_DATA
Method: PERSIST_SERVICE
Method: COMPENSATE
Method: IF_TASK_SERVICE_CALLBACK~ON_FAILURE
Method: GET_TASK_DATA
Method: SAVE
Method: REGISTER_USER
Method: CLEANUP
Method: DELETE_ENTRY
Method: COMPENSATE_RELEASE
Method: GET_USER_ID
Method: GET_OPEN_TASKS
Method: GET_TASK_STATUS