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=None, sliver_urn=None, append=False):
  63         if attributes is None: attributes=[]
  64         # add slice name to network tag
  65         network_tags = self.xml.xpath('//network')
  66         if network_tags:
  67             network_tag = network_tags[0]
  68             network_tag.set('slice', urn_to_hrn(sliver_urn)[0])
  69
  70         # add slivers
  71         sliver = {'name':sliver_urn,
  72                   'pl_tags': attributes}
  73         for hostname in hostnames:
  74             if sliver_urn:
  75                 sliver['name'] = sliver_urn
  76             node_elems = self.get_nodes({'component_id': '*%s*' % hostname})
  77             if not node_elems:
  78                 continue
  79             node_elem = node_elems[0]
  80             SFAv1Sliver.add_slivers(node_elem.element, sliver)
  81
  82         # remove all nodes without slivers
  83         if not append:
  84             for node_elem in self.get_nodes():
  85                 if not node_elem['slivers']:
  86                     parent = node_elem.element.getparent()
  87                     parent.remove(node_elem.element)
  88
  89
  90     def remove_slivers(self, slivers, network=None, no_dupes=False):
  91         SFAv1Node.remove_slivers(self.xml, slivers)
  92
  93     def get_slice_attributes(self, network=None):
  94         attributes = []
  95         nodes_with_slivers = self.get_nodes_with_slivers()
  96         for default_attribute in self.get_default_sliver_attributes(network):
  97             attribute = default_attribute.copy()
  98             attribute['node_id'] = None
  99             attributes.append(attribute)
 100         for node in nodes_with_slivers:
 101             nodename=node['component_name']
 102             sliver_attributes = self.get_sliver_attributes(nodename, network)
 103             for sliver_attribute in sliver_attributes:
 104                 sliver_attribute['node_id'] = nodename
 105                 attributes.append(sliver_attribute)
 106         return attributes
 107
 108
 109     def add_sliver_attribute(self, component_id, name, value, network=None):
 110         nodes = self.get_nodes({'component_id': '*%s*' % component_id})
 111         if nodes is not None and isinstance(nodes, list) and len(nodes) > 0:
 112             node = nodes[0]
 113             slivers = SFAv1Sliver.get_slivers(node)
 114             if slivers:
 115                 sliver = slivers[0]
 116                 SFAv1Sliver.add_sliver_attribute(sliver, name, value)
 117         else:
 118             # should this be an assert / raise an exception?
 119             logger.error("WARNING: failed to find component_id %s" % component_id)
 120
 121     def get_sliver_attributes(self, component_id, network=None):
 122         nodes = self.get_nodes({'component_id': '*%s*' % component_id})
 123         attribs = []
 124         if nodes is not None and isinstance(nodes, list) and len(nodes) > 0:
 125             node = nodes[0]
 126             slivers = SFAv1Sliver.get_slivers(node.element)
 127             if slivers is not None and isinstance(slivers, list) and len(slivers) > 0:
 128                 sliver = slivers[0]
 129                 attribs = SFAv1Sliver.get_sliver_attributes(sliver.element)
 130         return attribs
 131
 132     def remove_sliver_attribute(self, component_id, name, value, network=None):
 133         attribs = self.get_sliver_attributes(component_id)
 134         for attrib in attribs:
 135             if attrib['name'] == name and attrib['value'] == value:
 136                 #attrib.element.delete()
 137                 parent = attrib.element.getparent()
 138                 parent.remove(attrib.element)
 139
 140     def add_default_sliver_attribute(self, name, value, network=None):
 141         if network:
 142             defaults = self.xml.xpath("//network[@name='%s']/sliver_defaults" % network)
 143         else:
 144             defaults = self.xml.xpath("//sliver_defaults")
 145         if not defaults:
 146             if network:
 147                 network_tag = self.xml.xpath("//network[@name='%s']" % network)
 148             else:
 149                 network_tag = self.xml.xpath("//network")
 150             if isinstance(network_tag, list):
 151                 network_tag = network_tag[0]
 152             defaults = network_tag.add_element('sliver_defaults')
 153         elif isinstance(defaults, list):
 154             defaults = defaults[0]
 155         SFAv1Sliver.add_sliver_attribute(defaults, name, value)
 156
 157     def get_default_sliver_attributes(self, network=None):
 158         if network:
 159             defaults = self.xml.xpath("//network[@name='%s']/sliver_defaults" % network)
 160         else:
 161             defaults = self.xml.xpath("//sliver_defaults")
 162         if not defaults: return []
 163         return SFAv1Sliver.get_sliver_attributes(defaults[0])
 164
 165     def remove_default_sliver_attribute(self, name, value, network=None):
 166         attribs = self.get_default_sliver_attributes(network)
 167         for attrib in attribs:
 168             if attrib['name'] == name and attrib['value'] == value:
 169                 #attrib.element.delete()
 170                 parent = attrib.element.getparent()
 171                 parent.remove(attrib.element)
 172
 173     # Links
 174
 175     def get_links(self, network=None):
 176         return PGv2Link.get_links(self.xml)
 177
 178     def get_link_requests(self):
 179         return PGv2Link.get_link_requests(self.xml)
 180
 181     def add_links(self, links):
 182         networks = self.get_networks()
 183         if len(networks) > 0:
 184             xml = networks[0].element
 185         else:
 186             xml = self.xml
 187         PGv2Link.add_links(xml, links)
 188
 189     def add_link_requests(self, links):
 190         PGv2Link.add_link_requests(self.xml, links)
 191
 192     # utility
 193
 194     def merge(self, in_rspec):
 195         """
 196         Merge contents for specified rspec with current rspec
 197         """
 198
 199         if not in_rspec:
 200             return
 201
 202         from sfa.rspecs.rspec import RSpec
 203         if isinstance(in_rspec, RSpec):
 204             rspec = in_rspec
 205         else:
 206             rspec = RSpec(in_rspec)
 207         if rspec.version.type.lower() == 'protogeni':
 208             from sfa.rspecs.rspec_converter import RSpecConverter
 209             in_rspec = RSpecConverter.to_sfa_rspec(rspec.toxml())
 210             rspec = RSpec(in_rspec)
 211
 212         # just copy over all networks
 213         current_networks = self.get_networks()
 214         networks = rspec.version.get_networks()
 215         for network in networks:
 216             current_network = network.get('name')
 217             if current_network and current_network not in current_networks:
 218                 self.xml.append(network.element)
 219                 current_networks.append(current_network)
 220
 221     # Leases
 222
 223     def get_leases(self, filter=None):
 224         return SFAv1Lease.get_leases(self.xml, filter)
 225
 226     def add_leases(self, leases, network = None, no_dupes=False):
 227         SFAv1Lease.add_leases(self.xml, leases)
 228
 229     # Spectrum
 230
 231     def get_channels(self, filter=None):
 232         return []
 233
 234     def add_channels(self, channels, network = None, no_dupes=False):
 235         pass
 236
 237 if __name__ == '__main__':
 238     from sfa.rspecs.rspec import RSpec
 239     from sfa.rspecs.rspec_elements import *
 240     r = RSpec('/tmp/resources.rspec')
 241     r.load_rspec_elements(SFAv1.elements)
 242     print r.get(RSpecElements.NODE)