src/nepi/util/parsers/xml_parser.py

   1 #
   2 #    NEPI, a framework to manage network experiments
   3 #    Copyright (C) 2013 INRIA
   4 #
   5 #    This program is free software: you can redistribute it and/or modify
   6 #    it under the terms of the GNU General Public License as published by
   7 #    the Free Software Foundation, either version 3 of the License, or
   8 #    (at your option) any later version.
   9 #
  10 #    This program is distributed in the hope that it will be useful,
  11 #    but WITHOUT ANY WARRANTY; without even the implied warranty of
  12 #    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13 #    GNU General Public License for more details.
  14 #
  15 #    You should have received a copy of the GNU General Public License
  16 #    along with this program.  If not, see <http://www.gnu.org/licenses/>.
  17 #
  18 # Author: Alina Quereilhac <alina.quereilhac@inria.fr>
  19
  20 from nepi.util.timefuncs import stformat, tsformat
  21
  22 from xml.dom import minidom
  23
  24 import datetime
  25 import sys
  26 import os
  27
  28 STRING = "string"
  29 BOOL = "bool"
  30 INTEGER = "integer"
  31 DOUBLE = "float"
  32
  33 def xmlencode(s):
  34     if isinstance(s, str):
  35         rv = s.decode("latin1")
  36     if isinstance(s, datetime.datetime):
  37         rv = tsformat(s)
  38     elif not isinstance(s, unicode):
  39         rv = unicode(s)
  40     else:
  41         rv = s
  42     return rv.replace(u'\x00',u'&#0000;')
  43
  44 def xmldecode(s, cast = str):
  45     ret = s.replace(u'&#0000',u'\x00').encode("ascii")
  46     ret = cast(ret)
  47     if s == "None":
  48         return None
  49     return ret
  50
  51 def from_type(value):
  52     if isinstance(value, bool):
  53         return BOOL
  54     if isinstance(value, int):
  55         return INTEGER
  56     if isinstance(value, float):
  57         return DOUBLE
  58
  59     return STRING
  60
  61 def to_type(type, value):
  62     if not value:
  63         return value
  64
  65     if type == STRING:
  66         return str(value)
  67     if type == BOOL:
  68         return value == "True"
  69     if type == INTEGER:
  70         return int(value)
  71     if type == DOUBLE:
  72         return float(value)
  73
  74 class ECXMLParser(object):
  75     def to_xml(self, ec):
  76
  77         doc = minidom.Document()
  78
  79         self._ec_to_xml(doc, ec)
  80
  81         try:
  82             xml = doc.toprettyxml(indent="    ", encoding="UTF-8")
  83         except:
  84             print >>sys.stderr, "Oops: generating XML from %s" % (data,)
  85             raise
  86
  87         return xml
  88
  89     def _ec_to_xml(self, doc, ec):
  90         ecnode = doc.createElement("experiment")
  91         ecnode.setAttribute("exp_id", xmlencode(ec.exp_id))
  92         ecnode.setAttribute("run_id", xmlencode(ec.run_id))
  93         ecnode.setAttribute("nthreads", xmlencode(ec.nthreads))
  94         doc.appendChild(ecnode)
  95
  96         for guid, rm in ec._resources.iteritems():
  97             self._rm_to_xml(doc, ecnode, ec, guid, rm)
  98
  99         return doc
 100
 101     def _rm_to_xml(self, doc, ecnode, ec, guid, rm):
 102         rmnode = doc.createElement("rm")
 103         rmnode.setAttribute("guid", xmlencode(guid))
 104         rmnode.setAttribute("rtype", xmlencode(rm._rtype))
 105         rmnode.setAttribute("state", xmlencode(rm._state))
 106         if rm._start_time:
 107             rmnode.setAttribute("start_time", xmlencode(rm._start_time))
 108         if rm._stop_time:
 109             rmnode.setAttribute("stop_time", xmlencode(rm._stop_time))
 110         if rm._discover_time:
 111             rmnode.setAttribute("discover_time", xmlencode(rm._discover_time))
 112         if rm._provision_time:
 113             rmnode.setAttribute("provision_time", xmlencode(rm._provision_time))
 114         if rm._ready_time:
 115             rmnode.setAttribute("ready_time", xmlencode(rm._ready_time))
 116         if rm._release_time:
 117             rmnode.setAttribute("release_time", xmlencode(rm._release_time))
 118         if rm._failed_time:
 119             rmnode.setAttribute("failed_time", xmlencode(rm._failed_time))
 120         ecnode.appendChild(rmnode)
 121
 122         anode = doc.createElement("attributes")
 123         attributes = False
 124
 125         for attr in rm._attrs.values():
 126             if attr.has_changed:
 127                 attributes = True
 128                 aanode = doc.createElement("attribute")
 129                 aanode.setAttribute("name", xmlencode(attr.name))
 130                 aanode.setAttribute("value", xmlencode(attr.value))
 131                 aanode.setAttribute("type", from_type(attr.value))
 132                 anode.appendChild(aanode)
 133
 134         if attributes:
 135             rmnode.appendChild(anode)
 136
 137         cnode = doc.createElement("connections")
 138         connections = False
 139
 140         for guid in rm._connections:
 141             connections = True
 142             ccnode = doc.createElement("connection")
 143             ccnode.setAttribute("guid", xmlencode(guid))
 144             cnode.appendChild(ccnode)
 145
 146         if connections:
 147            rmnode.appendChild(cnode)
 148
 149         cnnode = doc.createElement("conditions")
 150         conditions = False
 151
 152         for action, conds in rm._conditions.iteritems():
 153             conditions = True
 154             for (group, state, time) in conds:
 155                 ccnnode = doc.createElement("condition")
 156                 ccnnode.setAttribute("action", xmlencode(action))
 157                 ccnnode.setAttribute("group", xmlencode(group))
 158                 ccnnode.setAttribute("state", xmlencode(state))
 159                 ccnnode.setAttribute("time", xmlencode(time))
 160                 cnnode.appendChild(ccnnode)
 161
 162         if conditions:
 163            rmnode.appendChild(cnnode)
 164
 165         tnode = doc.createElement("traces")
 166         traces = False
 167
 168         for trace in rm._trcs.values():
 169             if trace.enabled:
 170                 traces = True
 171                 ttnode = doc.createElement("trace")
 172                 ttnode.setAttribute("name", xmlencode(trace.name))
 173                 tnode.appendChild(ttnode)
 174
 175         if traces:
 176             rmnode.appendChild(tnode)
 177
 178     def from_xml(self, xml):
 179         doc = minidom.parseString(xml)
 180         return self._ec_from_xml(doc)
 181
 182     def _ec_from_xml(self, doc):
 183         from nepi.execution.ec import ExperimentController
 184         ec = None
 185
 186         ecnode_list = doc.getElementsByTagName("experiment")
 187         for ecnode in ecnode_list:
 188             if ecnode.nodeType == doc.ELEMENT_NODE:
 189                 exp_id = xmldecode(ecnode.getAttribute("exp_id"))
 190                 run_id = xmldecode(ecnode.getAttribute("run_id"))
 191                 nthreads = xmldecode(ecnode.getAttribute("nthreads"))
 192
 193                 os.environ["NEPI_NTHREADS"] = nthreads
 194                 ec = ExperimentController(exp_id = exp_id)
 195
 196                 connections = set()
 197
 198                 rmnode_list = ecnode.getElementsByTagName("rm")
 199                 for rmnode in rmnode_list:
 200                     if rmnode.nodeType == doc.ELEMENT_NODE:
 201                         self._rm_from_xml(doc, rmnode, ec, connections)
 202
 203                 for (guid1, guid2) in connections:
 204                     ec.register_connection(guid1, guid2)
 205
 206                 break
 207
 208         return ec
 209
 210     def _rm_from_xml(self, doc, rmnode, ec, connections):
 211         start_time = None
 212         stop_time = None
 213         discover_time = None
 214         provision_time = None
 215         ready_time = None
 216         release_time = None
 217         failed_time = None
 218
 219         guid = xmldecode(rmnode.getAttribute("guid"), int)
 220         rtype = xmldecode(rmnode.getAttribute("rtype"))
 221
 222         # FOR NOW ONLY STATE NEW IS ALLOWED
 223         state = 0
 224         """
 225         state = xmldecode(rmnode.getAttribute("state"), int)
 226
 227         if rmnode.hasAttribute("start_time"):
 228             start_time = xmldecode(rmnode.getAttribute("start_time"),
 229                     datetime.datetime)
 230         if rmnode.hasAttribute("stop_time"):
 231             stop_time = xmldecode(rmnode.getAttribute("stop_time"),
 232                     datetime.datetime)
 233         if rmnode.hasAttribute("discover_time"):
 234             dicover_time = xmldecode(rmnode.getAttribute("discover_time"),
 235                     datetime.datetime)
 236         if rmnode.hasAttribute("provision_time"):
 237             provision_time = xmldecode(rmnode.getAttribute("provision_time"),
 238                     datetime.datetime)
 239         if rmnode.hasAttribute("ready_time"):
 240             ready_time = xmldecode(rmnode.getAttribute("ready_time"),
 241                     datetime.datetime)
 242         if rmnode.hasAttribute("release_time"):
 243             release_time = xmldecode(rmnode.getAttribute("release_time"),
 244                     datetime.datetime)
 245         if rmnode.hasAttribute("failed_time"):
 246             failed_time = xmldecode(rmnode.getAttribute("failed_time"),
 247                     datetime.datetime)
 248         """
 249
 250         ec.register_resource(rtype, guid = guid)
 251         rm = ec.get_resource(guid)
 252         rm.set_state_time(state, "_start_time", start_time)
 253         rm.set_state_time(state, "_stop_time", stop_time)
 254         rm.set_state_time(state, "_discover_time", discover_time)
 255         rm.set_state_time(state, "_provision_time", provision_time)
 256         rm.set_state_time(state, "_ready_time", ready_time)
 257         rm.set_state_time(state, "_release_time", release_time)
 258         rm.set_state_time(state, "_failed_time", failed_time)
 259
 260         anode_list = rmnode.getElementsByTagName("attributes")
 261         if anode_list:
 262             aanode_list = anode_list[0].getElementsByTagName("attribute")
 263             for aanode in aanode_list:
 264                 name = xmldecode(aanode.getAttribute("name"))
 265                 value = xmldecode(aanode.getAttribute("value"))
 266                 tipe = xmldecode(aanode.getAttribute("type"))
 267                 value = to_type(tipe, value)
 268                 rm.set(name, value)
 269
 270         cnode_list = rmnode.getElementsByTagName("connections")
 271         if cnode_list:
 272             ccnode_list = cnode_list[0].getElementsByTagName("connection")
 273             for ccnode in ccnode_list:
 274                 guid2 = xmldecode(ccnode.getAttribute("guid"), int)
 275                 connections.add((guid, guid2))
 276
 277         tnode_list = rmnode.getElementsByTagName("traces")
 278         if tnode_list:
 279             ttnode_list = tnode_list[0].getElementsByTagName("trace")
 280             for ttnode in ttnode_list:
 281                 name = xmldecode(ttnode.getAttribute("name"))
 282                 ec.enable_trace(guid, name)
 283
 284         cnnode_list = rmnode.getElementsByTagName("conditions")
 285         if cnnode_list:
 286             ccnnode_list = cnnode_list[0].getElementsByTagName("condition")
 287             for ccnnode in ccnnode_list:
 288                 action = xmldecode(ccnnode.getAttribute("action"), int)
 289                 group = xmldecode(ccnnode.getAttribute("group"), eval)
 290                 state = xmldecode(ccnnode.getAttribute("state"), int)
 291                 time = xmldecode(ccnnode.getAttribute("time"))
 292                 time = to_type('STRING', time)
 293                 ec.register_condition(guid, action, group, state, time = time)
 294