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
25 def get_network_elements(self):
26 return self.xml.xpath('//network')
28 def get_networks(self):
29 return self.xml.xpath('//network[@name]/@name')
31 def get_node_element(self, hostname, network=None):
33 names = self.xml.xpath('//network[@name="%s"]//node/hostname' % network)
35 names = self.xml.xpath('//node/hostname')
37 if name.text == hostname:
38 return name.getparent()
41 def get_node_elements(self, network=None):
43 return self.xml.xpath('//network[@name="%s"]//node' % network)
45 return self.xml.xpath('//node')
47 def get_nodes(self, network=None):
49 nodes = self.xml.xpath('//node/hostname/text()')
51 nodes = self.xml.xpath('//network[@name="%s"]//node/hostname/text()' % network)
54 def get_nodes_with_slivers(self, network = None):
56 return self.xml.xpath('//network[@name="%s"]//node[sliver]/hostname/text()' % network)
58 return self.xml.xpath('//node[sliver]/hostname/text()')
60 def get_nodes_without_slivers(self, network=None):
61 xpath_nodes_without_slivers = '//node[not(sliver)]/hostname/text()'
62 xpath_nodes_without_slivers_in_network = '//network[@name="%s"]//node[not(sliver)]/hostname/text()'
64 return self.xml.xpath('//network[@name="%s"]//node[not(sliver)]/hostname/text()' % network)
66 return self.xml.xpath('//node[not(sliver)]/hostname/text()')
69 def attributes_list(self, elem):
70 # convert a list of attribute tags into list of tuples
71 # (tagnme, text_value)
75 opts.append((e.tag, e.text))
78 def get_default_sliver_attributes(self, network=None):
80 defaults = self.xml.xpath("//network[@name='%s']/sliver_defaults" % network)
82 defaults = self.xml.xpath("//network/sliver_defaults" % network)
83 return self.attributes_list(defaults)
85 def get_sliver_attributes(self, hostname, network=None):
86 node = self.get_node_element(hostname, network)
87 sliver = node.find("sliver")
88 return self.attributes_list(sliver)
90 def get_site_nodes(self, siteid, network=None):
92 nodes = self.xml.xpath('//network[@name="%s"]/site[@id="%s"]/node/hostname/text()' % \
95 nodes = self.xml.xpath('//site[@id="%s"]/node/hostname/text()' % siteid)
98 def get_links(self, network=None):
100 links = self.xml.xpath('//network[@name="%s"]/link' % network)
102 links = self.xml.xpath('//link')
105 (end1, end2) = link.get("endpoints").split()
106 name = link.find("description")
107 linklist.append((name.text,
108 self.get_site_nodes(end1, network),
109 self.get_site_nodes(end2, network)))
112 def get_link(self, fromnode, tonode, network=None):
113 fromsite = fromnode.getparent()
114 tosite = tonode.getparent()
115 fromid = fromsite.get("id")
116 toid = tosite.get("id")
118 query = "//network[@name='%s']" % network + "/link[@endpoints = '%s %s']"
120 query = "//link[@endpoints = '%s %s']"
122 results = self.rspec.xpath(query % (fromid, toid))
124 results = self.rspec.xpath(query % (toid, fromid))
127 def query_links(self, fromnode, tonode, network=None):
128 return get_link(fromnode, tonode, network)
130 def get_vlinks(self, network=None):
133 vlinks = self.xml.xpath("//network[@name='%s']//vlink" % network)
135 vlinks = self.xml.xpath("//vlink")
137 endpoints = vlink.get("endpoints")
138 (end1, end2) = endpoints.split()
140 node1 = self.xml.xpath('//network[@name="%s"]//node[@id="%s"]/hostname/text()' % \
142 node2 = self.xml.xpath('//network[@name="%s"]//node[@id="%s"]/hostname/text()' % \
145 node1 = self.xml.xpath('//node[@id="%s"]/hostname/text()' % end1)[0]
146 node2 = self.xml.xpath('//node[@id="%s"]/hostname/text()' % end2)[0]
147 desc = "%s <--> %s" % (node1, node2)
148 kbps = vlink.find("kbps")
149 vlinklist.append((endpoints, desc, kbps.text))
152 def get_vlink(self, endponts, network=None):
154 query = "//network[@name='%s']//vlink[@endpoints = '%s']" % (network, endpoints)
156 query = "//vlink[@endpoints = '%s']" % (network, endpoints)
157 results = self.rspec.xpath(query)
160 def query_vlinks(self, endpoints, network=None):
161 return get_vlink(endpoints,network)
167 def add_network(self, network):
168 network_tag = etree.SubElement(self.xml, 'network', id=network)
170 def add_nodes(self, nodes, network = None, no_dupes=False):
171 if not isinstance(nodes, list):
175 self.get_node_element(node['hostname']):
176 # node already exists
179 network_tag = self.xml
180 if 'network' in node:
181 network = node['network']
182 network_tags = self.xml.xpath('//network[@name="%s"]' % network)
184 network_tag = etree.SubElement(self.xml, 'network', name=network)
186 network_tag = network_tags[0]
188 node_tag = etree.SubElement(network_tag, 'node')
189 if 'network' in node:
190 node_tag.set('component_manager_id', network)
192 node_tag.set('component_id', node['urn'])
193 if 'site_urn' in node:
194 node_tag.set('site_id', node['site_urn'])
195 if 'node_id' in node:
196 node_tag.set('node_id', 'n'+str(node['node_id']))
197 if 'hostname' in node:
198 hostname_tag = etree.SubElement(node_tag, 'hostname').text = node['hostname']
199 if 'interfaces' in node:
200 for interface in node['interfaces']:
201 if 'bwlimit' in interface and interface['bwlimit']:
202 bwlimit = etree.SubElement(node_tag, 'bw_limit', units='kbps').text = str(interface['bwlimit']/1000)
204 for tag in node['tags']:
205 #expose this hard wired list of tags, plus the ones that are marked 'sfa' in their category
206 #if tag['tagname'] in ['fcdistro', 'arch'] or 'sfa' in tag['category'].split('/'):
207 #tag_element = etree.SubElement(node_tag, tag['tagname'], value=tag['value'])
209 #panos expose tags only if requested by the user using the -i option
210 if self.user_options:
211 #print "[sfa rspec] found tag ",tag," and have info ",self.user_options.get('info')
212 if self.user_options.get('info') and tag['tagname'] in self.user_options.get('info'):
213 tag_element = etree.SubElement(node_tag, tag['tagname'], value=tag['value'])
215 if 'sfa' in tag['category'].split('/'):
216 tag_element = etree.SubElement(node_tag, tag['tagname'], value=tag['value'])
219 longitude = str(node['site']['longitude'])
220 latitude = str(node['site']['latitude'])
221 location = etree.SubElement(node_tag, 'location', country='unknown', \
222 longitude=longitude, latitude=latitude)
224 def add_interfaces(self, interfaces):
227 def add_links(self, links):
230 def add_slivers(self, slivers, network=None, no_dupes=False):
231 if not isinstance(slivers, list):
234 nodes_with_slivers = self.get_nodes_with_slivers(network)
235 for sliver in slivers:
236 if sliver['hostname'] in nodes_with_slivers:
238 node_elem = self.get_node_element(sliver['hostname'], network)
239 sliver_elem = etree.SubElement(node_elem, 'sliver')
241 for tag in sliver['tags']:
242 etree.SubElement(sliver_elem, tag['tagname'], value=tag['value'])
244 def remove_slivers(self, slivers, network=None, no_dupes=False):
245 if not isinstance(slivers, list):
247 for sliver in slivers:
248 node_elem = self.get_node_element(sliver['hostname'], network)
249 sliver_elem = node.find('sliver')
250 if sliver_elem != None:
251 node_elem.remove(sliver)
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 defaults = etree.Element("sliver_defaults")
260 network = self.xml.xpath("//network[@name='%s']" % network)
261 network.insert(0, defaults)
262 self.add_attribute(defaults, name, value)
264 def add_sliver_attribute(self, hostname, name, value, network=None):
265 node = self.get_node_element(hostname, network)
266 sliver = node.find("sliver")
267 self.add_attribute(sliver, name, value)
269 def remove_default_sliver_attribute(self, name, value, network=None):
271 defaults = self.xml.xpath("//network[@name='%s']/sliver_defaults" % network)
273 defaults = self.xml.xpath("//sliver_defaults" % network)
274 self.remove_attribute(defaults, name, value)
276 def remove_sliver_attribute(self, hostname, name, value, network=None):
277 node = self.get_node_element(hostname, network)
278 sliver = node.find("sliver")
279 self.remove_attribute(sliver, name, value)
281 def add_vlink(self, fromhost, tohost, kbps, network=None):
282 fromnode = self.get_node_element(fromhost, network)
283 tonode = self.get_node_element(tohost, network)
284 links = self.get_link(fromnode, tonode, network)
287 vlink = etree.SubElement(link, "vlink")
288 fromid = fromnode.get("id")
289 toid = tonode.get("id")
290 vlink.set("endpoints", "%s %s" % (fromid, toid))
291 self.add_attribute(vlink, "kbps", kbps)
294 def remove_vlink(self, endpoints, network=None):
295 vlinks = self.query_vlinks(endpoints, network)
297 vlink.getparent().remove(vlink)
300 def merge(self, in_rspec):
302 Merge contents for specified rspec with current rspec
305 # just copy over all networks
306 current_networks = self.get_networks()
307 rspec = SfaRSpec(rspec=in_rspec)
308 networks = rspec.get_network_elements()
309 for network in networks:
310 current_network = network.get('name')
311 if not current_network in current_networks:
312 self.xml.append(network)
313 current_networks.append(current_network)
317 if __name__ == '__main__':
321 'hostname': 'node1.planet-lab.org',
322 'site_urn': 'urn:publicid:IDN+plc+authority+cm',
326 'hostname': 'node2.planet-lab.org',
327 'site_urn': 'urn:publicid:IDN+plc+authority+cm',
331 'hostname': 'node1.planet-lab.eu',
332 'site_urn': 'urn:publicid:IDN+plc+authority+cm',
336 rspec.add_nodes(nodes)