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