1 from sfa.util.xrn import Xrn
2 from sfa.rspecs.elements.element import Element
3 from sfa.rspecs.elements.link import Link
4 from sfa.rspecs.elements.interface import Interface
5 from sfa.rspecs.elements.property import Property
9 def add_links(xml, links):
12 link_elem = xml.add_instance('link', link, ['component_name', 'component_id', 'client_id'])
13 # set component manager element
14 if 'component_manager' in link and link['component_manager']:
15 cm_element = link_elem.add_element('component_manager', name=link['component_manager'])
16 # set interface_ref elements
17 if link.get('interface1') and link.get('interface2'):
18 for if_ref in [link['interface1'], link['interface2']]:
19 link_elem.add_instance('interface_ref', if_ref, Interface.fields)
20 # set property elements
21 prop1 = link_elem.add_element('property', source_id = link['interface1']['component_id'],
22 dest_id = link['interface2']['component_id'], capacity=link['capacity'],
23 latency=link['latency'], packet_loss=link['packet_loss'])
24 prop2 = link_elem.add_element('property', source_id = link['interface2']['component_id'],
25 dest_id = link['interface1']['component_id'], capacity=link['capacity'],
26 latency=link['latency'], packet_loss=link['packet_loss'])
28 type_elem = link_elem.add_element('link_type', name=link['type'])
33 link_elems = xml.xpath('//default:link | //link')
34 for link_elem in link_elems:
35 # set client_id, component_id, component_name
36 link = Link(link_elem.attrib, link_elem)
38 # set component manager
39 component_managers = link_elem.xpath('./default:component_manager | ./component_manager')
40 if len(component_managers) > 0 and 'name' in component_managers[0].attrib:
41 link['component_manager'] = component_managers[0].attrib['name']
44 link_types = link_elem.xpath('./default:link_type | ./link_type')
45 if len(link_types) > 0 and 'name' in link_types[0].attrib:
46 link['type'] = link_types[0].attrib['name']
48 # get capacity, latency and packet_loss from first property
49 property_fields = ['capacity', 'latency', 'packet_loss']
50 property_elems = link_elem.xpath('./default:property | ./property')
51 if len(property_elems) > 0:
52 prop = property_elems[0]
53 for attrib in ['capacity', 'latency', 'packet_loss']:
54 if attrib in prop.attrib:
55 link[attrib] = prop.attrib[attrib]
58 iface_elems = link_elem.xpath('./default:interface_ref | ./interface_ref')
59 interfaces = [iface_elem.get_instance(Interface) for iface_elem in iface_elems]
60 if len(interfaces) > 1:
61 link['interface1'] = interfaces[0]
62 link['interface2'] = interfaces[1]
67 def add_link_requests(xml, link_tuples, append=False):
68 if not isinstance(link_tuples, set):
69 link_tuples = set(link_tuples)
71 available_links = PGv2Link.get_links(xml)
73 for link in available_links:
74 if_name1 = Xrn(link['interface1']['component_id']).get_leaf()
75 if_name2 = Xrn(link['interface2']['component_id']).get_leaf()
78 l_tup_1 = (if_name1, if_name2)
79 l_tup_2 = (if_name2, if_name1)
80 if link_tuples.issuperset([(if_name1, if_name2)]):
81 requested_link = (if_name1, if_name2)
82 elif link_tuples.issuperset([(if_name2, if_name2)]):
83 requested_link = (if_name2, if_name1)
85 # add client id to link ane interface elements
86 link.element.set('client_id', link['component_name'])
87 link['interface1'].element.set('client_id', Xrn(link['interface1']['component_id']).get_leaf())
88 link['interface2'].element.set('client_id', Xrn(link['interface2']['component_id']).get_leaf())
89 recently_added.append(link['component_name'])
92 # remove all links that don't have a client id
93 for link in PGv2Link.get_links(xml):
94 if not link['client_id'] or link['component_name'] not in recently_added:
95 parent = link.element.getparent()
96 parent.remove(link.element)
99 def get_link_requests(xml):
101 for link in PGv2Link.get_links(xml):
102 if link['client_id'] != None:
103 link_requests.append(link)