def prepare_slice(api, slice_xrn, creds, users):
reg_objects = __get_registry_objects(slice_xrn, creds, users)
(hrn, type) = urn_to_hrn(slice_xrn)
slices = Slices(api)
peer = slices.get_peer(hrn)
sfa_peer = slices.get_sfa_peer(hrn)
slice_record=None
if users:
slice_record = users[0].get('slice_record', {})
registry = api.registries[api.hrn]
credential = api.getCredential()
# ensure site record exists
site = slices.verify_site(hrn, slice_record, peer, sfa_peer)
# ensure slice record exists
slice = slices.verify_slice(hrn, slice_record, peer, sfa_peer)
# ensure person records exists
persons = slices.verify_persons(hrn, slice, users, peer, sfa_peer)
def CreateSliver(api, slice_xrn, creds, rspec_string, users, call_id):
"""
Create the sliver[s] (slice) at this aggregate.
Verify HRN and initialize the slice record in PLC if necessary.
"""
if Callids().already_handled(call_id): return ""
aggregate = Aggregate(api)
slices = Slices(api)
(hrn, type) = urn_to_hrn(slice_xrn)
peer = slices.get_peer(hrn)
sfa_peer = slices.get_sfa_peer(hrn)
slice_record=None
if users:
slice_record = users[0].get('slice_record', {})
# parse rspec
rspec = RSpec(rspec_string)
requested_attributes = rspec.version.get_slice_attributes()
# ensure site record exists
site = slices.verify_site(hrn, slice_record, peer, sfa_peer)
# ensure slice record exists
slice = slices.verify_slice(hrn, slice_record, peer, sfa_peer)
# ensure person records exists
persons = slices.verify_persons(hrn, slice, users, peer, sfa_peer)
# ensure slice attributes exists
slices.verify_slice_attributes(slice, requested_attributes)
# add/remove slice from nodes
requested_slivers = [str(host) for host in rspec.version.get_nodes_with_slivers()]
slices.verify_slice_nodes(slice, requested_slivers, peer)
# hanlde MyPLC peer association.
# only used by plc and ple.
slices.handle_peer(site, slice, persons, peer)
return aggregate.get_rspec(slice_xrn=slice_xrn, version=rspec.version)
