from copy import deepcopy from lxml import etree from sfa.util.xrn import hrn_to_urn, urn_to_hrn from sfa.util.plxrn import PlXrn from sfa.rspecs.rspec_version import BaseVersion from sfa.rspecs.rspec_elements import RSpecElement, RSpecElements from sfa.rspecs.elements.versions.pgv2Link import PGv2Link from sfa.rspecs.elements.versions.sfav1Node import SFAv1Node class SFAv1(BaseVersion): enabled = True type = 'SFA' content_type = '*' version = '1' schema = None namespace = None extensions = {} namespaces = None elements = [] template = '' % type def get_network_elements(self): return self.xml.xpath('//network') def get_networks(self): return self.xml.xpath('//network[@name]/@name') def get_nodes(self, network=None): return SFAv1Node.get_nodes(self.xml) def get_nodes_with_slivers(self, network = None): return SFAv1Node.get_nodes_with_slivers(self.xml) def attributes_list(self, elem): # convert a list of attribute tags into list of tuples # (tagnme, text_value) opts = [] if elem is not None: for e in elem: opts.append((e.tag, str(e.text).strip())) return opts 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 isinstance(defaults, list) and defaults: defaults = defaults[0] return self.attributes_list(defaults) def get_sliver_attributes(self, hostname, network=None): attributes = [] node = self.get_node_element(hostname, network) #sliver = node.find("sliver") slivers = node.xpath('./sliver') if isinstance(slivers, list) and slivers: attributes = self.attributes_list(slivers[0]) return attributes def get_slice_attributes(self, network=None): slice_attributes = [] nodes_with_slivers = self.get_nodes_with_slivers(network) for default_attribute in self.get_default_sliver_attributes(network): attribute = {'name': str(default_attribute[0]), 'value': str(default_attribute[1]), 'node_id': None} slice_attributes.append(attribute) for node in nodes_with_slivers: sliver_attributes = self.get_sliver_attributes(node, network) for sliver_attribute in sliver_attributes: attribute = {'name': str(sliver_attribute[0]), 'value': str(sliver_attribute[1]), 'node_id': node} slice_attributes.append(attribute) return slice_attributes def get_links(self, network=None): return PGv2Link.get_links(self.xml) def get_link_requests(self): return PGv2Link.get_link_requests(self.xml) ################## # Builder ################## def add_network(self, network): network_tags = self.xml.xpath('//network[@name="%s"]' % network) if not network_tags: network_tag = etree.SubElement(self.xml.root, 'network', name=network) else: network_tag = network_tags[0] return network_tag def add_nodes(self, nodes, network = None, no_dupes=False): SFAv1Node.add_nodes(self.xml, nodes) 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)) def add_links(self, links): networks = self.get_network_elements() if len(networks) > 0: xml = networks[0] else: xml = self.xml PGv2Link.add_links(xml, links) def add_link_requests(self, links): PGv2Link.add_link_requests(self.xml, links) def add_slivers(self, slivers, network=None, sliver_urn=None, no_dupes=False, append=False): # 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]) all_nodes = self.get_nodes() nodes_with_slivers = [sliver['hostname'] for sliver in slivers] nodes_without_slivers = set(all_nodes).difference(nodes_with_slivers) # add slivers for sliver in slivers: node_elem = self.get_node_element(sliver['hostname'], network) if not node_elem: continue sliver_elem = etree.SubElement(node_elem, 'sliver') if 'tags' in sliver: for tag in sliver['tags']: etree.SubElement(sliver_elem, tag['tagname']).text = value=tag['value'] # remove all nodes without slivers if not append: for node in nodes_without_slivers: node_elem = self.get_node_element(node) parent = node_elem.getparent() parent.remove(node_elem) def remove_slivers(self, slivers, network=None, no_dupes=False): SFAv1Node.remove_slivers(self.xml, slivers) 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" % network) if not defaults : network_tag = self.xml.xpath("//network[@name='%s']" % network) if isinstance(network_tag, list): network_tag = network_tag[0] defaults = self.xml.add_element('sliver_defaults', attrs={}, parent=network_tag) elif isinstance(defaults, list): defaults = defaults[0] self.xml.add_attribute(defaults, name, value) def add_sliver_attribute(self, hostname, name, value, network=None): node = self.get_node_element(hostname, network) sliver = node.find("sliver") self.xml.add_attribute(sliver, name, value) def remove_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" % network) self.xml.remove_attribute(defaults, name, value) def remove_sliver_attribute(self, hostname, name, value, network=None): node = self.get_node_element(hostname, network) sliver = node.find("sliver") self.xml.remove_attribute(sliver, name, value) def merge(self, in_rspec): """ Merge contents for specified rspec with current rspec """ 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_network_elements() for network in networks: current_network = network.get('name') if current_network and current_network not in current_networks: self.xml.root.append(network) current_networks.append(current_network) 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)