2 from sfa.rspecs.elements.link import Link
3 from sfa.rspecs.elements.interface import Interface
4 from sfa.rspecs.rspec_elements import RSpecElement, RSpecElements
9 'link': RSpecElement(RSpecElements.LINK, '//default:link | //link'),
10 'component_manager': RSpecElement(RSpecElements.COMPONENT_MANAGER, './default:component_manager | ./component_manager'),
11 'link_type': RSpecElement(RSpecElements.LINK_TYPE, './default:link_type | ./link_type'),
12 'property': RSpecElement(RSpecElements.PROPERTY, './default:property | ./property'),
13 'interface_ref': RSpecElement(RSpecElements.INTERFACE_REF, './default:interface_ref | ./interface_ref')
17 def add_links(xml, links):
19 link_elem = etree.SubElement(xml, 'link')
20 for attrib in ['component_name', 'component_id', 'client_id']:
21 if attrib in link and link[attrib]:
22 link_elem.set(attrib, link[attrib])
23 if 'component_manager' in link and link['component_manager']:
24 cm_element = etree.SubElement(link_elem, 'component_manager', name=link['component_manager'])
25 for if_ref in [link['interface1'], link['interface2']]:
26 if_ref_elem = etree.SubElement(link_elem, 'interface_ref')
27 for attrib in Interface.fields:
28 if attrib in if_ref and if_ref[attrib]:
29 if_ref_elem.attrib[attrib] = if_ref[attrib]
30 prop1 = etree.SubElement(link_elem, 'property', source_id = link['interface1']['component_id'],
31 dest_id = link['interface2']['component_id'], capacity=link['capacity'],
32 latency=link['latency'], packet_loss=link['packet_loss'])
33 prop2 = etree.SubElement(link_elem, 'property', source_id = link['interface2']['component_id'],
34 dest_id = link['interface1']['component_id'], capacity=link['capacity'],
35 latency=link['latency'], packet_loss=link['packet_loss'])
36 if 'type' in link and link['type']:
37 type_elem = etree.SubElement(link_elem, 'link_type', name=link['type'])
40 def get_links(xml, namespaces=None):
42 link_elems = xml.xpath(PGv2Link.elements['link'].path, namespaces=namespaces)
43 for link_elem in link_elems:
44 # set client_id, component_id, component_name
45 link = Link(link_elem.attrib)
46 # set component manager
47 cm = link_elem.xpath('./default:component_manager', namespaces=namespaces)
50 if 'name' in cm.attrib:
51 link['component_manager'] = cm.attrib['name']
53 link_types = link_elem.xpath(PGv2Link.elements['link_type'].path, namespaces=namespaces)
54 if len(link_types) > 0:
55 link_type = link_types[0]
56 if 'name' in link_type.attrib:
57 link['type'] = link_type.attrib['name']
59 # get capacity, latency and packet_loss from first property
60 props = link_elem.xpath(PGv2Link.elements['property'].path, namespaces=namespaces)
63 for attrib in ['capacity', 'latency', 'packet_loss']:
64 if attrib in prop.attrib:
65 link[attrib] = prop.attrib[attrib]
68 if_elems = link_elem.xpath(PGv2Link.elements['interface_ref'].path, namespaces=namespaces)
70 for if_elem in if_elems:
71 if_ref = Interface(if_elem.attrib)
74 link['interface1'] = ifs[0]
75 link['interface2'] = ifs[1]