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
8 from sfa.rspecs.rspec_version import RSpecVersion
11 _version = { 'type': 'SFA',
15 sfa_rspec_version = RSpecVersion(_version)
17 class SfaRSpec(RSpec):
19 header = '<?xml version="1.0"?>\n'
20 version = sfa_rspec_version
24 self.xml.set('type', 'SFA')
29 def get_network_elements(self):
30 return self.xml.xpath('//network')
32 def get_networks(self):
33 return self.xml.xpath('//network[@name]/@name')
35 def get_node_element(self, hostname, network=None):
37 names = self.xml.xpath('//network[@name="%s"]//node/hostname' % network)
39 names = self.xml.xpath('//node/hostname')
41 if name.text == hostname:
42 return name.getparent()
45 def get_node_elements(self, network=None):
47 return self.xml.xpath('//network[@name="%s"]//node' % network)
49 return self.xml.xpath('//node')
51 def get_nodes(self, network=None):
53 nodes = self.xml.xpath('//node/hostname/text()')
55 nodes = self.xml.xpath('//network[@name="%s"]//node/hostname/text()' % network)
57 nodes = [node.strip() for node in nodes]
60 def get_nodes_with_slivers(self, network = None):
62 nodes = self.xml.xpath('//network[@name="%s"]//node[sliver]/hostname/text()' % network)
64 nodes = self.xml.xpath('//node[sliver]/hostname/text()')
66 nodes = [node.strip() for node in nodes]
68 def get_nodes_without_slivers(self, network=None):
69 xpath_nodes_without_slivers = '//node[not(sliver)]/hostname/text()'
70 xpath_nodes_without_slivers_in_network = '//network[@name="%s"]//node[not(sliver)]/hostname/text()'
72 return self.xml.xpath('//network[@name="%s"]//node[not(sliver)]/hostname/text()' % network)
74 return self.xml.xpath('//node[not(sliver)]/hostname/text()')
77 def attributes_list(self, elem):
78 # convert a list of attribute tags into list of tuples
79 # (tagnme, text_value)
83 opts.append((e.tag, e.text))
86 def get_default_sliver_attributes(self, network=None):
88 defaults = self.xml.xpath("//network[@name='%s']/sliver_defaults" % network)
90 defaults = self.xml.xpath("//network/sliver_defaults" % network)
91 return self.attributes_list(defaults)
93 def get_sliver_attributes(self, hostname, network=None):
94 node = self.get_node_element(hostname, network)
95 sliver = node.find("sliver")
96 return self.attributes_list(sliver)
98 def get_slice_attributes(self, network=None):
102 def get_site_nodes(self, siteid, network=None):
104 nodes = self.xml.xpath('//network[@name="%s"]/site[@id="%s"]/node/hostname/text()' % \
107 nodes = self.xml.xpath('//site[@id="%s"]/node/hostname/text()' % siteid)
110 def get_links(self, network=None):
112 links = self.xml.xpath('//network[@name="%s"]/link' % network)
114 links = self.xml.xpath('//link')
117 (end1, end2) = link.get("endpoints").split()
118 name = link.find("description")
119 linklist.append((name.text,
120 self.get_site_nodes(end1, network),
121 self.get_site_nodes(end2, network)))
124 def get_link(self, fromnode, tonode, network=None):
125 fromsite = fromnode.getparent()
126 tosite = tonode.getparent()
127 fromid = fromsite.get("id")
128 toid = tosite.get("id")
130 query = "//network[@name='%s']" % network + "/link[@endpoints = '%s %s']"
132 query = "//link[@endpoints = '%s %s']"
134 results = self.rspec.xpath(query % (fromid, toid))
136 results = self.rspec.xpath(query % (toid, fromid))
139 def query_links(self, fromnode, tonode, network=None):
140 return get_link(fromnode, tonode, network)
142 def get_vlinks(self, network=None):
145 vlinks = self.xml.xpath("//network[@name='%s']//vlink" % network)
147 vlinks = self.xml.xpath("//vlink")
149 endpoints = vlink.get("endpoints")
150 (end1, end2) = endpoints.split()
152 node1 = self.xml.xpath('//network[@name="%s"]//node[@id="%s"]/hostname/text()' % \
154 node2 = self.xml.xpath('//network[@name="%s"]//node[@id="%s"]/hostname/text()' % \
157 node1 = self.xml.xpath('//node[@id="%s"]/hostname/text()' % end1)[0]
158 node2 = self.xml.xpath('//node[@id="%s"]/hostname/text()' % end2)[0]
159 desc = "%s <--> %s" % (node1, node2)
160 kbps = vlink.find("kbps")
161 vlinklist.append((endpoints, desc, kbps.text))
164 def get_vlink(self, endponts, network=None):
166 query = "//network[@name='%s']//vlink[@endpoints = '%s']" % (network, endpoints)
168 query = "//vlink[@endpoints = '%s']" % (network, endpoints)
169 results = self.rspec.xpath(query)
172 def query_vlinks(self, endpoints, network=None):
173 return get_vlink(endpoints,network)
179 def add_network(self, network):
180 network_tag = etree.SubElement(self.xml, 'network', id=network)
182 def add_nodes(self, nodes, network = None, no_dupes=False):
183 if not isinstance(nodes, list):
187 self.get_node_element(node['hostname']):
188 # node already exists
191 network_tag = self.xml
192 if 'network' in node:
193 network = node['network']
194 network_tags = self.xml.xpath('//network[@name="%s"]' % network)
196 network_tag = etree.SubElement(self.xml, 'network', name=network)
198 network_tag = network_tags[0]
200 node_tag = etree.SubElement(network_tag, 'node')
201 if 'network' in node:
202 node_tag.set('component_manager_id', network)
204 node_tag.set('component_id', node['urn'])
205 if 'site_urn' in node:
206 node_tag.set('site_id', node['site_urn'])
207 if 'node_id' in node:
208 node_tag.set('node_id', 'n'+str(node['node_id']))
209 if 'hostname' in node:
210 hostname_tag = etree.SubElement(node_tag, 'hostname').text = node['hostname']
211 if 'interfaces' in node:
212 for interface in node['interfaces']:
213 if 'bwlimit' in interface and interface['bwlimit']:
214 bwlimit = etree.SubElement(node_tag, 'bw_limit', units='kbps').text = str(interface['bwlimit']/1000)
216 for tag in node['tags']:
217 # expose this hard wired list of tags, plus the ones that are marked 'sfa' in their category
218 if tag['tagname'] in ['fcdistro', 'arch'] or 'sfa' in tag['category'].split('/'):
219 tag_element = etree.SubElement(node_tag, tag['tagname'], value=tag['value'])
222 longitude = str(node['site']['longitude'])
223 latitude = str(node['site']['latitude'])
224 location = etree.SubElement(node_tag, 'location', country='unknown', \
225 longitude=longitude, latitude=latitude)
227 def add_interfaces(self, interfaces):
230 def add_links(self, links):
233 def add_slivers(self, slivers, network=None, sliver_urn=None, no_dupes=False):
234 slivers = self._process_slivers(slivers)
235 nodes_with_slivers = self.get_nodes_with_slivers(network)
236 for sliver in slivers:
237 if sliver['hostname'] in nodes_with_slivers:
239 node_elem = self.get_node_element(sliver['hostname'], network)
240 sliver_elem = etree.SubElement(node_elem, 'sliver')
242 for tag in sliver['tags']:
243 etree.SubElement(sliver_elem, tag['tagname']).text = value=tag['value']
245 def remove_slivers(self, slivers, network=None, no_dupes=False):
246 slivers = self._process_slivers(slivers)
247 for sliver in slivers:
248 node_elem = self.get_node_element(sliver['hostname'], network)
249 sliver_elem = node_elem.find('sliver')
250 if sliver_elem != None:
251 node_elem.remove(sliver_elem)
253 def add_default_sliver_attribute(self, name, value, network=None):
255 defaults = self.xml.xpath("//network[@name='%s']/sliver_defaults" % network)
257 defaults = self.xml.xpath("//sliver_defaults" % network)
259 network_tag = self.xml.xpath("//network[@name='%s']" % network)
260 if isinstance(network_tag, list):
261 network_tag = network_tag[0]
262 defaults = self.add_element('sliver_defaults', attrs={}, parent=network_tag)
263 elif isinstance(defaults, list):
264 defaults = defaults[0]
265 self.add_attribute(defaults, name, value)
267 def add_sliver_attribute(self, hostname, name, value, network=None):
268 node = self.get_node_element(hostname, network)
269 sliver = node.find("sliver")
270 self.add_attribute(sliver, name, value)
272 def remove_default_sliver_attribute(self, name, value, network=None):
274 defaults = self.xml.xpath("//network[@name='%s']/sliver_defaults" % network)
276 defaults = self.xml.xpath("//sliver_defaults" % network)
277 self.remove_attribute(defaults, name, value)
279 def remove_sliver_attribute(self, hostname, name, value, network=None):
280 node = self.get_node_element(hostname, network)
281 sliver = node.find("sliver")
282 self.remove_attribute(sliver, name, value)
284 def add_vlink(self, fromhost, tohost, kbps, network=None):
285 fromnode = self.get_node_element(fromhost, network)
286 tonode = self.get_node_element(tohost, network)
287 links = self.get_link(fromnode, tonode, network)
290 vlink = etree.SubElement(link, "vlink")
291 fromid = fromnode.get("id")
292 toid = tonode.get("id")
293 vlink.set("endpoints", "%s %s" % (fromid, toid))
294 self.add_attribute(vlink, "kbps", kbps)
297 def remove_vlink(self, endpoints, network=None):
298 vlinks = self.query_vlinks(endpoints, network)
300 vlink.getparent().remove(vlink)
303 def merge(self, in_rspec):
305 Merge contents for specified rspec with current rspec
308 # just copy over all networks
309 current_networks = self.get_networks()
310 rspec = SfaRSpec(rspec=in_rspec)
311 networks = rspec.get_network_elements()
312 for network in networks:
313 current_network = network.get('name')
314 if not current_network in current_networks:
315 self.xml.append(network)
316 current_networks.append(current_network)
320 if __name__ == '__main__':
324 'hostname': 'node1.planet-lab.org',
325 'site_urn': 'urn:publicid:IDN+plc+authority+cm',
329 'hostname': 'node2.planet-lab.org',
330 'site_urn': 'urn:publicid:IDN+plc+authority+cm',
334 'hostname': 'node1.planet-lab.eu',
335 'site_urn': 'urn:publicid:IDN+plc+authority+cm',
339 rspec.add_nodes(nodes)