sfa/rspecs/versions/sfav1.py

   1 from copy import deepcopy
   2 from lxml import etree
   3
   4 from sfa.util.sfalogging import logger
   5 from sfa.util.xrn import hrn_to_urn, urn_to_hrn
   6 from sfa.rspecs.version import RSpecVersion
   7 from sfa.rspecs.elements.element import Element
   8 from sfa.rspecs.elements.versions.pgv2Link import PGv2Link
   9 from sfa.rspecs.elements.versions.sfav1Node import SFAv1Node
  10 from sfa.rspecs.elements.versions.sfav1Sliver import SFAv1Sliver
  11 from sfa.rspecs.elements.versions.sfav1Lease import SFAv1Lease
  12
  13 class SFAv1(RSpecVersion):
  14     enabled = True
  15     type = 'SFA'
  16     content_type = '*'
  17     version = '1'
  18     schema = ''
  19     namespace = ''
  20     extensions = {}
  21     namespaces = None
  22     template = '<RSpec type="%s"></RSpec>' % type
  23
  24     # Network
  25     def get_networks(self):
  26         network_elems = self.xml.xpath('//network')
  27         networks = [network_elem.get_instance(fields=['name', 'slice']) for \
  28                     network_elem in network_elems]
  29         return networks
  30
  31
  32     def add_network(self, network):
  33         network_tags = self.xml.xpath('//network[@name="%s"]' % network)
  34         if not network_tags:
  35             network_tag = self.xml.add_element('network', name=network)
  36         else:
  37             network_tag = network_tags[0]
  38         return network_tag
  39
  40
  41     # Nodes
  42
  43     def get_nodes(self, filter=None):
  44         return SFAv1Node.get_nodes(self.xml, filter)
  45
  46     def get_nodes_with_slivers(self):
  47         return SFAv1Node.get_nodes_with_slivers(self.xml)
  48
  49     def add_nodes(self, nodes, network = None, no_dupes=False, rspec_content_type=None):
  50         SFAv1Node.add_nodes(self.xml, nodes, rspec_content_type)
  51
  52     def merge_node(self, source_node_tag, network, no_dupes=False):
  53         if no_dupes and self.get_node_element(node['hostname']):
  54             # node already exists
  55             return
  56
  57         network_tag = self.add_network(network)
  58         network_tag.append(deepcopy(source_node_tag))
  59
  60     # Slivers
  61
  62     def add_slivers(self, hostnames, attributes=[], sliver_urn=None, append=False):
  63         # add slice name to network tag
  64         network_tags = self.xml.xpath('//network')
  65         if network_tags:
  66             network_tag = network_tags[0]
  67             network_tag.set('slice', urn_to_hrn(sliver_urn)[0])
  68
  69         # add slivers
  70         sliver = {'name':sliver_urn,
  71                   'pl_tags': attributes}
  72         for hostname in hostnames:
  73             if sliver_urn:
  74                 sliver['name'] = sliver_urn
  75             node_elems = self.get_nodes({'component_id': '*%s*' % hostname})
  76             if not node_elems:
  77                 continue
  78             node_elem = node_elems[0]
  79             SFAv1Sliver.add_slivers(node_elem.element, sliver)
  80
  81         # remove all nodes without slivers
  82         if not append:
  83             for node_elem in self.get_nodes():
  84                 if not node_elem['slivers']:
  85                     parent = node_elem.element.getparent()
  86                     parent.remove(node_elem.element)
  87
  88
  89     def remove_slivers(self, slivers, network=None, no_dupes=False):
  90         SFAv1Node.remove_slivers(self.xml, slivers)
  91
  92     def get_slice_attributes(self, network=None):
  93         attributes = []
  94         nodes_with_slivers = self.get_nodes_with_slivers()
  95         for default_attribute in self.get_default_sliver_attributes(network):
  96             attribute = default_attribute.copy()
  97             attribute['node_id'] = None
  98             attributes.append(attribute)
  99         for node in nodes_with_slivers:
 100             nodename=node['component_name']
 101             sliver_attributes = self.get_sliver_attributes(nodename, network)
 102             for sliver_attribute in sliver_attributes:
 103                 sliver_attribute['node_id'] = nodename
 104                 attributes.append(sliver_attribute)
 105         return attributes
 106
 107
 108     def add_sliver_attribute(self, component_id, name, value, network=None):
 109         nodes = self.get_nodes({'component_id': '*%s*' % component_id})
 110         if nodes is not None and isinstance(nodes, list) and len(nodes) > 0:
 111             node = nodes[0]
 112             slivers = SFAv1Sliver.get_slivers(node)
 113             if slivers:
 114                 sliver = slivers[0]
 115                 SFAv1Sliver.add_sliver_attribute(sliver, name, value)
 116         else:
 117             # should this be an assert / raise an exception?
 118             logger.error("WARNING: failed to find component_id %s" % component_id)
 119
 120     def get_sliver_attributes(self, component_id, network=None):
 121         nodes = self.get_nodes({'component_id': '*%s*' % component_id})
 122         attribs = []
 123         if nodes is not None and isinstance(nodes, list) and len(nodes) > 0:
 124             node = nodes[0]
 125             slivers = SFAv1Sliver.get_slivers(node.element)
 126             if slivers is not None and isinstance(slivers, list) and len(slivers) > 0:
 127                 sliver = slivers[0]
 128                 attribs = SFAv1Sliver.get_sliver_attributes(sliver.element)
 129         return attribs
 130
 131     def remove_sliver_attribute(self, component_id, name, value, network=None):
 132         attribs = self.get_sliver_attributes(component_id)
 133         for attrib in attribs:
 134             if attrib['name'] == name and attrib['value'] == value:
 135                 #attrib.element.delete()
 136                 parent = attrib.element.getparent()
 137                 parent.remove(attrib.element)
 138
 139     def add_default_sliver_attribute(self, name, value, network=None):
 140         if network:
 141             defaults = self.xml.xpath("//network[@name='%s']/sliver_defaults" % network)
 142         else:
 143             defaults = self.xml.xpath("//sliver_defaults")
 144         if not defaults:
 145             if network:
 146                 network_tag = self.xml.xpath("//network[@name='%s']" % network)
 147             else:
 148                 network_tag = self.xml.xpath("//network")
 149             if isinstance(network_tag, list):
 150                 network_tag = network_tag[0]
 151             defaults = network_tag.add_element('sliver_defaults')
 152         elif isinstance(defaults, list):
 153             defaults = defaults[0]
 154         SFAv1Sliver.add_sliver_attribute(defaults, name, value)
 155
 156     def get_default_sliver_attributes(self, network=None):
 157         if network:
 158             defaults = self.xml.xpath("//network[@name='%s']/sliver_defaults" % network)
 159         else:
 160             defaults = self.xml.xpath("//sliver_defaults")
 161         if not defaults: return []
 162         return SFAv1Sliver.get_sliver_attributes(defaults[0])
 163
 164     def remove_default_sliver_attribute(self, name, value, network=None):
 165         attribs = self.get_default_sliver_attributes(network)
 166         for attrib in attribs:
 167             if attrib['name'] == name and attrib['value'] == value:
 168                 #attrib.element.delete()
 169                 parent = attrib.element.getparent()
 170                 parent.remove(attrib.element)
 171
 172     # Links
 173
 174     def get_links(self, network=None):
 175         return PGv2Link.get_links(self.xml)
 176
 177     def get_link_requests(self):
 178         return PGv2Link.get_link_requests(self.xml)
 179
 180     def add_links(self, links):
 181         networks = self.get_networks()
 182         if len(networks) > 0:
 183             xml = networks[0].element
 184         else:
 185             xml = self.xml
 186         PGv2Link.add_links(xml, links)
 187
 188     def add_link_requests(self, links):
 189         PGv2Link.add_link_requests(self.xml, links)
 190
 191     # utility
 192
 193     def merge(self, in_rspec):
 194         """
 195         Merge contents for specified rspec with current rspec
 196         """
 197
 198         if not in_rspec:
 199             return
 200
 201         from sfa.rspecs.rspec import RSpec
 202         if isinstance(in_rspec, RSpec):
 203             rspec = in_rspec
 204         else:
 205             rspec = RSpec(in_rspec)
 206         if rspec.version.type.lower() == 'protogeni':
 207             from sfa.rspecs.rspec_converter import RSpecConverter
 208             in_rspec = RSpecConverter.to_sfa_rspec(rspec.toxml())
 209             rspec = RSpec(in_rspec)
 210
 211         # just copy over all networks
 212         current_networks = self.get_networks()
 213         networks = rspec.version.get_networks()
 214         for network in networks:
 215             current_network = network.get('name')
 216             if current_network and current_network not in current_networks:
 217                 self.xml.append(network.element)
 218                 current_networks.append(current_network)
 219
 220     # Leases
 221
 222     def get_leases(self, filter=None):
 223         return SFAv1Lease.get_leases(self.xml, filter)
 224
 225     def add_leases(self, leases, network = None, no_dupes=False):
 226         SFAv1Lease.add_leases(self.xml, leases)
 227
 228     # Spectrum
 229
 230     def get_channels(self, filter=None):
 231         return []
 232
 233     def add_channels(self, channels, network = None, no_dupes=False):
 234         pass
 235
 236 if __name__ == '__main__':
 237     from sfa.rspecs.rspec import RSpec
 238     from sfa.rspecs.rspec_elements import *
 239     r = RSpec('/tmp/resources.rspec')
 240     r.load_rspec_elements(SFAv1.elements)
 241     print r.get(RSpecElements.NODE)