sfa/rspecs/pg_rspec.py

   1 #!/usr/bin/python
   2 from __future__ import with_statement
   3 from lxml import etree
   4 from xmlbuilder import XMLBuilder
   5 from StringIO import StringIO
   6 from sfa.util.xrn import *
   7
   8 class PGRSpec:
   9     xml_tree = None
  10     namespaces = {'rspecv2':'http://www.protogeni.net/resources/rspec/0.2'}
  11
  12
  13     def __init__(self, rspec="", namespaces={}):
  14         try:
  15             self.xml_tree = etree.parse(rspec)
  16             if namespaces:
  17                self.namespaces = namespaces
  18
  19         except IOError:
  20             # 'rspec' file doesnt exist. 'rspec' is proably an xml string
  21             try:
  22                 self.xml_tree = etree.parse(StringIO(rspec))
  23             except:
  24                 raise IOError("Must specify a xml file or xml string. Received: " + rspec )
  25
  26     def get_network(self):
  27         network = None
  28         root = self.xml_tree.getroot()
  29         nodes = root.xpath("//rspecv2:node[@component_manager_uuid][1]", self.namespaces)
  30         if nodes:
  31             network  = nodes[0].get('component_manager_uuid')
  32         return network
  33
  34     def get_nodes(self, nodes_with_slivers=False):
  35         root = self.xml_tree.getroot()
  36         nodes = root.xpath("//rspecv2:node", self.namespaces)
  37         return nodes
  38
  39
  40     def to_sfa_node(self, site, node, i=0):
  41         cm_urn = node.get('component_manager_uuid')
  42         c_name = node.get('component_name')
  43         c_urn = node.get('component_uuid')
  44         c_hrn, _ = urn_to_hrn(c_urn)
  45         node_tag = etree.SubElement(site, "node")
  46         node_tag.set("component_manager_uuid", cm_urn)
  47         node_tag.set("component_name", c_name)
  48         node_tag.set("component_uuid", c_urn)
  49         hostname_tag = etree.SubElement(node_tag, "hostname").text = c_hrn
  50         urn_tag = etree.SubElement(node_tag, "urn").text = c_hrn
  51         for child in node.getchildren():
  52             node_tag.append(transform(child).getroot())
  53
  54
  55     def to_sfa_network(self, xml):
  56         network_urn = self.get_network()
  57         network,  _ = urn_to_hrn(network_urn)
  58         nodes = self.get_nodes()
  59         network_tag = etree.SubElement(xml, "network")
  60         network_tag.set("name", network)
  61         network_tag.set("id", network)
  62         site_tag = etree.SubElement(network_tag, "Site")
  63         site_tag.set("id", network)
  64         name = etree.SubElement(site_tag, "name").text = network
  65         i = 0
  66         for node in nodes:
  67             self.to_sfa_node(site_tag, node, i)
  68
  69     def to_sfa_rspec(self):
  70         header = '<?xml version="1.0"?>\n'
  71         xml = etree.Element("RSpec", type="SFA")
  72         self.to_sfa_network(xml)
  73         return header + etree.tostring(xml, pretty_print=True)
  74
  75 if __name__ == '__main__':
  76    pass