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