3 from StringIO import StringIO
4 from sfa.rspecs.rspec import RSpec
5 from sfa.util.xrn import *
6 from sfa.util.plxrn import hostname_to_urn
7 from sfa.util.config import Config
10 class SfaRSpec(RSpec):
12 header = '<?xml version="1.0"?>\n'
18 def get_network_elements(self):
19 return self.xml.xpath('//network')
21 def get_networks(self):
22 return self.xml.xpath('//network[@name]/@name')
24 def get_node_element(self, hostname, network=None):
26 names = self.xml.xpath('//network[@name="%s"]//node/hostname' % network)
28 names = self.xml.xpath('//node/hostname')
30 if name.text == hostname:
31 return name.getparent()
34 def get_node_elements(self):
35 return self.xml.xpath('//node')
37 def get_nodes(self, network=None):
39 nodes = self.xml.xpath('//node/hostname/text()')
41 nodes = self.xml.xpath('//network[@name="%s"]//node/hostname/text()' % network, self.namespaces)
44 def get_nodes_with_slivers(self, network = None):
46 return self.xml.xpath('//network[@name="%s"]//node[sliver]/hostname/text()' % network, self.namespaces)
48 return self.xml.xpath('//node[sliver]/hostname/text()', self.namespaces)
50 def get_nodes_without_slivers(self, network=None):
51 xpath_nodes_without_slivers = '//node[not(sliver)]/hostname/text()'
52 xpath_nodes_without_slivers_in_network = '//network[@name="%s"]//node[not(sliver)]/hostname/text()'
54 return self.xml.xpath('//network[@name="%s"]//node[not(sliver)]/hostname/text()' % network, self.namespaces)
56 return self.xml.xpath('//node[not(sliver)]/hostname/text()', self.namespaces)
59 def attributes_list(self, elem):
60 # convert a list of attribute tags into list of tuples
61 # (tagnme, text_value)
65 opts.append((e.tag, e.text))
68 def get_default_sliver_attributes(self, network=None):
70 defaults = self.xml.xpath("//network[@name='%s']/sliver_defaults" % network, self.namespaces)
72 defaults = self.xml.xpath("//network/sliver_defaults" % network, self.namespaces)
73 return self.attributes_list(defaults)
75 def get_sliver_attributes(self, hostname, network=None):
76 node = self.get_node_element(hostname, network)
77 sliver = node.find("sliver")
78 return self.attributes_list(sliver)
80 def get_site_nodes(self, siteid, network=None):
82 nodes = self.xml.xpath('//network[@name="%s"]/site[@id="%s"]/node/hostname/text()' % \
83 (network, siteid), self.namespaces)
85 nodes = self.xml.xpath('//site[@id="%s"]/node/hostname/text()' % siteid, self.namespaces)
88 def get_links(self, network=None):
90 links = self.xml.xpath('//network[@name="%s"]/link' % network, self.namespaces)
92 links = self.xml.xpath('//link')
95 (end1, end2) = link.get("endpoints").split()
96 name = link.find("description")
97 linklist.append((name.text,
98 self.get_site_nodes(end1, network),
99 self.get_site_nodes(end2, network)))
102 def get_link(self, fromnode, tonode, network=None):
103 fromsite = fromnode.getparent()
104 tosite = tonode.getparent()
105 fromid = fromsite.get("id")
106 toid = tosite.get("id")
108 query = "//network[@name='%s']" % network + "/link[@endpoints = '%s %s']"
110 query = "//link[@endpoints = '%s %s']"
112 results = self.rspec.xpath(query % (fromid, toid))
114 results = self.rspec.xpath(query % (toid, fromid))
117 def query_links(self, fromnode, tonode, network=None):
118 return get_link(fromnode, tonode, network)
120 def get_vlinks(self, network=None):
123 vlinks = self.xml.xpath("//network[@name='%s']//vlink" % network, self.namespaces)
125 vlinks = self.xml.xpath("//vlink", self.namespaces)
127 endpoints = vlink.get("endpoints")
128 (end1, end2) = endpoints.split()
130 node1 = self.xml.xpath('//network[@name="%s"]//node[@id="%s"]/hostname/text()' % \
132 node2 = self.xml.xpath('//network[@name="%s"]//node[@id="%s"]/hostname/text()' % \
135 node1 = self.xml.xpath('//node[@id="%s"]/hostname/text()' % end1)[0]
136 node2 = self.xml.xpath('//node[@id="%s"]/hostname/text()' % end2)[0]
137 desc = "%s <--> %s" % (node1, node2)
138 kbps = vlink.find("kbps")
139 vlinklist.append((endpoints, desc, kbps.text))
142 def get_vlink(self, endponts, network=None):
144 query = "//network[@name='%s']//vlink[@endpoints = '%s']" % (network, endpoints)
146 query = "//vlink[@endpoints = '%s']" % (network, endpoints)
147 results = self.rspec.xpath(query)
150 def query_vlinks(self, endpoints, network=None):
151 return get_vlink(endpoints,network)
157 def add_network(self, network):
158 network_tag = etree.SubElement(self.xml, 'network', id=network)
160 def add_nodes(self, nodes, network = None, no_dupes=False):
161 if not isinstance(nodes, list):
165 self.get_node_element(node['hostname']):
166 # node already exists
169 network_tag = self.xml
170 if 'network' in node:
171 network = node['network']
172 network_tags = self.xml.xpath('//network[@name="%s"]' % network)
174 network_tag = etree.SubElement(self.xml, 'network', name=network)
176 network_tag = network_tags[0]
178 node_tag = etree.SubElement(network_tag, 'node')
179 if 'network' in node:
180 node_tag.set('component_manager_id', network)
182 node_tag.set('component_id', node['urn'])
183 if 'site_urn' in node:
184 node_tag.set('site_id', node['site_urn'])
185 if 'node_id' in node:
186 node_tag.set('node_id', 'n'+str(node['node_id']))
187 if 'hostname' in node:
188 hostname_tag = etree.SubElement(node_tag, 'hostname').text = node['hostname']
189 for interface in node['interfaces']:
190 if 'bwlimit' in node:
191 bwlimit = etree.SubElement(node_tag, 'bwlimit', units='kbps').tet = str(interface['bwlimit']/1000)
194 def add_interfaces(self, interfaces):
197 def add_links(self, links):
200 def add_slivers(self, hostnames, network=None, no_dupes=False):
201 if not isinstance(hostnames, list):
202 hostnames = [hostnames]
204 nodes_with_slivers = self.get_nodes_with_slivers(network)
205 for hostname in hostnames:
206 if hostname in nodes_with_slivers:
208 node = self.get_node_element(hostname, network)
209 etree.SubElement(node, 'sliver')
211 def remove_slivers(self, hostnames, network=None, no_dupes=False):
212 if not isinstance(hostnames, list):
213 hostnames = [hostnames]
214 for hostname in hostnames:
215 node = self.get_node_element(hostname, network)
216 sliver = node.find('sliver')
220 def add_default_sliver_attribute(self, name, value, network=None):
222 defaults = self.xml.xpath("//network[@name='%s']/sliver_defaults" % network)
224 defaults = self.xml.xpath("//sliver_defaults" % network)
226 defaults = etree.Element("sliver_defaults")
227 network = self.xml.xpath("//network[@name='%s']" % network)
228 network.insert(0, defaults)
229 self.add_attribute(defaults, name, value)
231 def add_sliver_attribute(self, hostname, name, value, network=None):
232 node = self.get_node_element(hostname, network)
233 sliver = node.find("sliver")
234 self.add_attribute(sliver, name, value)
236 def remove_default_sliver_attribute(self, name, value, network=None):
238 defaults = self.xml.xpath("//network[@name='%s']/sliver_defaults" % network)
240 defaults = self.xml.xpath("//sliver_defaults" % network)
241 self.remove_attribute(defaults, name, value)
243 def remove_sliver_attribute(self, hostname, name, value, network=None):
244 node = self.get_node_element(hostname, network)
245 sliver = node.find("sliver")
246 self.remove_attribute(sliver, name, value)
248 def add_vlink(self, fromhost, tohost, kbps, network=None):
249 fromnode = self.get_node_element(fromhost, network)
250 tonode = self.get_node_element(tohost, network)
251 links = self.get_link(fromnode, tonode, network)
254 vlink = etree.SubElement(link, "vlink")
255 fromid = fromnode.get("id")
256 toid = tonode.get("id")
257 vlink.set("endpoints", "%s %s" % (fromid, toid))
258 self.add_attribute(vlink, "kbps", kbps)
261 def remove_vlink(self, endpoints, network=None):
262 vlinks = self.query_vlinks(endpoints, network)
264 vlink.getparent().remove(vlink)
267 def merge(self, in_rspec):
269 Merge contents for specified rspec with current rspec
272 # just copy over all networks
273 current_networks = self.get_networks()
274 rspec = SfaRSpec(rspec=in_rspec)
275 networks = rspec.get_network_elements()
276 for network in networks:
277 current_network = network.get('name')
278 if not current_network in current_networks:
279 self.xml.append(network)
280 current_networks.append(current_network)
284 if __name__ == '__main__':
288 'hostname': 'node1.planet-lab.org',
289 'site_urn': 'urn:publicid:IDN+plc+authority+cm',
293 'hostname': 'node2.planet-lab.org',
294 'site_urn': 'urn:publicid:IDN+plc+authority+cm',
298 'hostname': 'node1.planet-lab.eu',
299 'site_urn': 'urn:publicid:IDN+plc+authority+cm',
303 rspec.add_nodes(nodes)