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'
19 def get_network_elements(self):
20 return self.xml.xpath('//network')
22 def get_networks(self):
23 return self.xml.xpath('//network[@name]/@name')
25 def get_node_element(self, hostname, network=None):
27 names = self.xml.xpath('//network[@name="%s"]//node/hostname' % network)
29 names = self.xml.xpath('//node/hostname')
31 if name.text == hostname:
32 return name.getparent()
35 def get_node_elements(self, network=None):
37 return self.xml.xpath('//network[@name="%s"]//node' % network)
39 return self.xml.xpath('//node')
41 def get_nodes(self, network=None):
43 nodes = self.xml.xpath('//node/hostname/text()')
45 nodes = self.xml.xpath('//network[@name="%s"]//node/hostname/text()' % network)
48 def get_nodes_with_slivers(self, network = None):
50 return self.xml.xpath('//network[@name="%s"]//node[sliver]/hostname/text()' % network)
52 return self.xml.xpath('//node[sliver]/hostname/text()')
54 def get_nodes_without_slivers(self, network=None):
55 xpath_nodes_without_slivers = '//node[not(sliver)]/hostname/text()'
56 xpath_nodes_without_slivers_in_network = '//network[@name="%s"]//node[not(sliver)]/hostname/text()'
58 return self.xml.xpath('//network[@name="%s"]//node[not(sliver)]/hostname/text()' % network)
60 return self.xml.xpath('//node[not(sliver)]/hostname/text()')
63 def attributes_list(self, elem):
64 # convert a list of attribute tags into list of tuples
65 # (tagnme, text_value)
69 opts.append((e.tag, e.text))
72 def get_default_sliver_attributes(self, network=None):
74 defaults = self.xml.xpath("//network[@name='%s']/sliver_defaults" % network)
76 defaults = self.xml.xpath("//network/sliver_defaults" % network)
77 return self.attributes_list(defaults)
79 def get_sliver_attributes(self, hostname, network=None):
80 node = self.get_node_element(hostname, network)
81 sliver = node.find("sliver")
82 return self.attributes_list(sliver)
84 def get_site_nodes(self, siteid, network=None):
86 nodes = self.xml.xpath('//network[@name="%s"]/site[@id="%s"]/node/hostname/text()' % \
89 nodes = self.xml.xpath('//site[@id="%s"]/node/hostname/text()' % siteid)
92 def get_links(self, network=None):
94 links = self.xml.xpath('//network[@name="%s"]/link' % network)
96 links = self.xml.xpath('//link')
99 (end1, end2) = link.get("endpoints").split()
100 name = link.find("description")
101 linklist.append((name.text,
102 self.get_site_nodes(end1, network),
103 self.get_site_nodes(end2, network)))
106 def get_link(self, fromnode, tonode, network=None):
107 fromsite = fromnode.getparent()
108 tosite = tonode.getparent()
109 fromid = fromsite.get("id")
110 toid = tosite.get("id")
112 query = "//network[@name='%s']" % network + "/link[@endpoints = '%s %s']"
114 query = "//link[@endpoints = '%s %s']"
116 results = self.rspec.xpath(query % (fromid, toid))
118 results = self.rspec.xpath(query % (toid, fromid))
121 def query_links(self, fromnode, tonode, network=None):
122 return get_link(fromnode, tonode, network)
124 def get_vlinks(self, network=None):
127 vlinks = self.xml.xpath("//network[@name='%s']//vlink" % network)
129 vlinks = self.xml.xpath("//vlink")
131 endpoints = vlink.get("endpoints")
132 (end1, end2) = endpoints.split()
134 node1 = self.xml.xpath('//network[@name="%s"]//node[@id="%s"]/hostname/text()' % \
136 node2 = self.xml.xpath('//network[@name="%s"]//node[@id="%s"]/hostname/text()' % \
139 node1 = self.xml.xpath('//node[@id="%s"]/hostname/text()' % end1)[0]
140 node2 = self.xml.xpath('//node[@id="%s"]/hostname/text()' % end2)[0]
141 desc = "%s <--> %s" % (node1, node2)
142 kbps = vlink.find("kbps")
143 vlinklist.append((endpoints, desc, kbps.text))
146 def get_vlink(self, endponts, network=None):
148 query = "//network[@name='%s']//vlink[@endpoints = '%s']" % (network, endpoints)
150 query = "//vlink[@endpoints = '%s']" % (network, endpoints)
151 results = self.rspec.xpath(query)
154 def query_vlinks(self, endpoints, network=None):
155 return get_vlink(endpoints,network)
161 def add_network(self, network):
162 network_tag = etree.SubElement(self.xml, 'network', id=network)
164 def add_nodes(self, nodes, network = None, no_dupes=False):
165 if not isinstance(nodes, list):
169 self.get_node_element(node['hostname']):
170 # node already exists
173 network_tag = self.xml
174 if 'network' in node:
175 network = node['network']
176 network_tags = self.xml.xpath('//network[@name="%s"]' % network)
178 network_tag = etree.SubElement(self.xml, 'network', name=network)
180 network_tag = network_tags[0]
182 node_tag = etree.SubElement(network_tag, 'node')
183 if 'network' in node:
184 node_tag.set('component_manager_id', network)
186 node_tag.set('component_id', node['urn'])
187 if 'site_urn' in node:
188 node_tag.set('site_id', node['site_urn'])
189 if 'node_id' in node:
190 node_tag.set('node_id', 'n'+str(node['node_id']))
191 if 'hostname' in node:
192 hostname_tag = etree.SubElement(node_tag, 'hostname').text = node['hostname']
193 if 'interfaces' in node:
194 for interface in node['interfaces']:
195 if 'bwlimit' in interface and interface['bwlimit']:
196 bwlimit = etree.SubElement(node_tag, 'bw_limit', units='kbps').tet = str(interface['bwlimit']/1000)
198 for tag in node['tags']:
199 # expose this hard wired list of tags, plus the ones that are marked 'sfa' in their category
200 if tag['tagname'] in ['fcdistro', 'arch'] or 'sfa' in tag['category'].split('/'):
201 tag_element = etree.SubElement(node_tag, tag['tagname'], value=tag['value'])
204 longitude = str(node['site']['longitude'])
205 latitude = str(node['site']['latitude'])
206 location = etree.SubElement(node_tag, 'location', country='unknown', \
207 longitude=longitude, latitude=latitude)
209 def add_interfaces(self, interfaces):
212 def add_links(self, links):
215 def add_slivers(self, slivers, network=None, no_dupes=False):
216 if not isinstance(slivers, list):
219 nodes_with_slivers = self.get_nodes_with_slivers(network)
220 for sliver in slivers:
221 if sliver['hostname'] in nodes_with_slivers:
223 node_elem = self.get_node_element(sliver['hostname'], network)
224 sliver_elem = etree.SubElement(node_elem, 'sliver')
226 for tag in sliver['tags']:
227 etree.SubElement(sliver_elem, tag['tagname'], value=tag['value'])
229 def remove_slivers(self, slivers, network=None, no_dupes=False):
230 if not isinstance(slivers, list):
232 for sliver in slivers:
233 node_elem = self.get_node_element(sliver['hostname'], network)
234 sliver_elem = node.find('sliver')
235 if sliver_elem != None:
236 node_elem.remove(sliver)
238 def add_default_sliver_attribute(self, name, value, network=None):
240 defaults = self.xml.xpath("//network[@name='%s']/sliver_defaults" % network)
242 defaults = self.xml.xpath("//sliver_defaults" % network)
244 defaults = etree.Element("sliver_defaults")
245 network = self.xml.xpath("//network[@name='%s']" % network)
246 network.insert(0, defaults)
247 self.add_attribute(defaults, name, value)
249 def add_sliver_attribute(self, hostname, name, value, network=None):
250 node = self.get_node_element(hostname, network)
251 sliver = node.find("sliver")
252 self.add_attribute(sliver, name, value)
254 def remove_default_sliver_attribute(self, name, value, network=None):
256 defaults = self.xml.xpath("//network[@name='%s']/sliver_defaults" % network)
258 defaults = self.xml.xpath("//sliver_defaults" % network)
259 self.remove_attribute(defaults, name, value)
261 def remove_sliver_attribute(self, hostname, name, value, network=None):
262 node = self.get_node_element(hostname, network)
263 sliver = node.find("sliver")
264 self.remove_attribute(sliver, name, value)
266 def add_vlink(self, fromhost, tohost, kbps, network=None):
267 fromnode = self.get_node_element(fromhost, network)
268 tonode = self.get_node_element(tohost, network)
269 links = self.get_link(fromnode, tonode, network)
272 vlink = etree.SubElement(link, "vlink")
273 fromid = fromnode.get("id")
274 toid = tonode.get("id")
275 vlink.set("endpoints", "%s %s" % (fromid, toid))
276 self.add_attribute(vlink, "kbps", kbps)
279 def remove_vlink(self, endpoints, network=None):
280 vlinks = self.query_vlinks(endpoints, network)
282 vlink.getparent().remove(vlink)
285 def merge(self, in_rspec):
287 Merge contents for specified rspec with current rspec
290 # just copy over all networks
291 current_networks = self.get_networks()
292 rspec = SfaRSpec(rspec=in_rspec)
293 networks = rspec.get_network_elements()
294 for network in networks:
295 current_network = network.get('name')
296 if not current_network in current_networks:
297 self.xml.append(network)
298 current_networks.append(current_network)
302 if __name__ == '__main__':
306 'hostname': 'node1.planet-lab.org',
307 'site_urn': 'urn:publicid:IDN+plc+authority+cm',
311 'hostname': 'node2.planet-lab.org',
312 'site_urn': 'urn:publicid:IDN+plc+authority+cm',
316 'hostname': 'node1.planet-lab.eu',
317 'site_urn': 'urn:publicid:IDN+plc+authority+cm',
321 rspec.add_nodes(nodes)