from copy import deepcopy from lxml import etree from sfa.util.sfalogging import logger from sfa.util.xrn import hrn_to_urn, urn_to_hrn from sfa.rspecs.version import RSpecVersion from sfa.rspecs.elements.element import Element from sfa.rspecs.elements.versions.pgv2Link import PGv2Link from sfa.rspecs.elements.versions.sfav1Node import SFAv1Node from sfa.rspecs.elements.versions.sfav1Sliver import SFAv1Sliver from sfa.rspecs.elements.versions.sfav1Lease import SFAv1Lease class SFAv1(RSpecVersion): enabled = True type = 'SFA' content_type = '*' version = '1' schema = '' namespace = '' extensions = {} namespaces = None template = '' % type # Network def get_networks(self): network_elems = self.xml.xpath('//network') networks = [network_elem.get_instance(fields=['name', 'slice']) for network_elem in network_elems] return networks def add_network(self, network): network_tags = self.xml.xpath('//network[@name="%s"]' % network) if not network_tags: network_tag = self.xml.add_element('network', name=network) else: network_tag = network_tags[0] return network_tag # Nodes def get_nodes(self, filter=None): return SFAv1Node.get_nodes(self.xml, filter) def get_nodes_with_slivers(self): return SFAv1Node.get_nodes_with_slivers(self.xml) def add_nodes(self, nodes, network=None, no_dupes=False, rspec_content_type=None): SFAv1Node.add_nodes(self.xml, nodes, rspec_content_type) def merge_node(self, source_node_tag, network, no_dupes=False): if no_dupes and self.get_node_element(node['hostname']): # node already exists return network_tag = self.add_network(network) network_tag.append(deepcopy(source_node_tag)) # Slivers def add_slivers(self, hostnames, attributes=None, sliver_urn=None, append=False): if attributes is None: attributes = [] # add slice name to network tag network_tags = self.xml.xpath('//network') if network_tags: network_tag = network_tags[0] network_tag.set('slice', urn_to_hrn(sliver_urn)[0]) # add slivers sliver = {'name': sliver_urn, 'pl_tags': attributes} for hostname in hostnames: if sliver_urn: sliver['name'] = sliver_urn node_elems = self.get_nodes({'component_id': '*%s*' % hostname}) if not node_elems: continue node_elem = node_elems[0] SFAv1Sliver.add_slivers(node_elem.element, sliver) # remove all nodes without slivers if not append: for node_elem in self.get_nodes(): if not node_elem['slivers']: parent = node_elem.element.getparent() parent.remove(node_elem.element) def remove_slivers(self, slivers, network=None, no_dupes=False): SFAv1Node.remove_slivers(self.xml, slivers) def get_slice_attributes(self, network=None): attributes = [] nodes_with_slivers = self.get_nodes_with_slivers() for default_attribute in self.get_default_sliver_attributes(network): attribute = default_attribute.copy() attribute['node_id'] = None attributes.append(attribute) for node in nodes_with_slivers: nodename = node['component_name'] sliver_attributes = self.get_sliver_attributes(nodename, network) for sliver_attribute in sliver_attributes: sliver_attribute['node_id'] = nodename attributes.append(sliver_attribute) return attributes def add_sliver_attribute(self, component_id, name, value, network=None): nodes = self.get_nodes({'component_id': '*%s*' % component_id}) if nodes is not None and isinstance(nodes, list) and len(nodes) > 0: node = nodes[0] slivers = SFAv1Sliver.get_slivers(node) if slivers: sliver = slivers[0] SFAv1Sliver.add_sliver_attribute(sliver, name, value) else: # should this be an assert / raise an exception? logger.error("WARNING: failed to find component_id %s" % component_id) def get_sliver_attributes(self, component_id, network=None): nodes = self.get_nodes({'component_id': '*%s*' % component_id}) attribs = [] if nodes is not None and isinstance(nodes, list) and len(nodes) > 0: node = nodes[0] slivers = SFAv1Sliver.get_slivers(node.element) if slivers is not None and isinstance(slivers, list) and len(slivers) > 0: sliver = slivers[0] attribs = SFAv1Sliver.get_sliver_attributes(sliver.element) return attribs def remove_sliver_attribute(self, component_id, name, value, network=None): attribs = self.get_sliver_attributes(component_id) for attrib in attribs: if attrib['name'] == name and attrib['value'] == value: # attrib.element.delete() parent = attrib.element.getparent() parent.remove(attrib.element) def add_default_sliver_attribute(self, name, value, network=None): if network: defaults = self.xml.xpath( "//network[@name='%s']/sliver_defaults" % network) else: defaults = self.xml.xpath("//sliver_defaults") if not defaults: if network: network_tag = self.xml.xpath("//network[@name='%s']" % network) else: network_tag = self.xml.xpath("//network") if isinstance(network_tag, list): network_tag = network_tag[0] defaults = network_tag.add_element('sliver_defaults') elif isinstance(defaults, list): defaults = defaults[0] SFAv1Sliver.add_sliver_attribute(defaults, name, value) def get_default_sliver_attributes(self, network=None): if network: defaults = self.xml.xpath( "//network[@name='%s']/sliver_defaults" % network) else: defaults = self.xml.xpath("//sliver_defaults") if not defaults: return [] return SFAv1Sliver.get_sliver_attributes(defaults[0]) def remove_default_sliver_attribute(self, name, value, network=None): attribs = self.get_default_sliver_attributes(network) for attrib in attribs: if attrib['name'] == name and attrib['value'] == value: # attrib.element.delete() parent = attrib.element.getparent() parent.remove(attrib.element) # Links def get_links(self, network=None): return PGv2Link.get_links(self.xml) def get_link_requests(self): return PGv2Link.get_link_requests(self.xml) def add_links(self, links): networks = self.get_networks() if len(networks) > 0: xml = networks[0].element else: xml = self.xml PGv2Link.add_links(xml, links) def add_link_requests(self, links): PGv2Link.add_link_requests(self.xml, links) # utility def merge(self, in_rspec): """ Merge contents for specified rspec with current rspec """ if not in_rspec: return from sfa.rspecs.rspec import RSpec if isinstance(in_rspec, RSpec): rspec = in_rspec else: rspec = RSpec(in_rspec) if rspec.version.type.lower() == 'protogeni': from sfa.rspecs.rspec_converter import RSpecConverter in_rspec = RSpecConverter.to_sfa_rspec(rspec.toxml()) rspec = RSpec(in_rspec) # just copy over all networks current_networks = self.get_networks() networks = rspec.version.get_networks() for network in networks: current_network = network.get('name') if current_network and current_network not in current_networks: self.xml.append(network.element) current_networks.append(current_network) # Leases def get_leases(self, filter=None): return SFAv1Lease.get_leases(self.xml, filter) def add_leases(self, leases, network=None, no_dupes=False): SFAv1Lease.add_leases(self.xml, leases) # Spectrum def get_channels(self, filter=None): return [] def add_channels(self, channels, network=None, no_dupes=False): pass if __name__ == '__main__': from sfa.rspecs.rspec import RSpec from sfa.rspecs.rspec_elements import * r = RSpec('/tmp/resources.rspec') r.load_rspec_elements(SFAv1.elements) print(r.get(RSpecElements.NODE))