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.netgraph import NetGraph, TopologyType
  21 from nepi.util.timefuncs import stformat, tsformat
  22
  23 from xml.dom import minidom
  24
  25 import datetime
  26 import sys
  27 import os
  28
  29 STRING = "string"
  30 BOOL = "bool"
  31 INTEGER = "integer"
  32 DOUBLE = "float"
  33
  34 def xmlencode(s):
  35     if isinstance(s, str):
  36         rv = s.decode("latin1")
  37     if isinstance(s, datetime.datetime):
  38         rv = tsformat(s)
  39     elif not isinstance(s, unicode):
  40         rv = unicode(s)
  41     else:
  42         rv = s
  43     return rv.replace(u'\x00',u'&#0000;')
  44
  45 def xmldecode(s, cast = str):
  46     ret = s.replace(u'&#0000',u'\x00').encode("ascii")
  47     ret = cast(ret)
  48     if s == "None":
  49         return None
  50     return ret
  51
  52 def from_type(value):
  53     if isinstance(value, bool):
  54         return BOOL
  55     if isinstance(value, int):
  56         return INTEGER
  57     if isinstance(value, float):
  58         return DOUBLE
  59
  60     return STRING
  61
  62 def to_type(type, value):
  63     if not value:
  64         return value
  65
  66     if type == STRING:
  67         return str(value)
  68     if type == BOOL:
  69         return value == "True"
  70     if type == INTEGER:
  71         return int(value)
  72     if type == DOUBLE:
  73         return float(value)
  74
  75 class ECXMLParser(object):
  76     def to_xml(self, ec):
  77
  78         doc = minidom.Document()
  79
  80         self._ec_to_xml(doc, ec)
  81
  82         try:
  83             xml = doc.toprettyxml(indent="    ", encoding="UTF-8")
  84         except:
  85             print >>sys.stderr, "Oops: generating XML from %s" % (data,)
  86             raise
  87
  88         return xml
  89
  90     def _ec_to_xml(self, doc, ec):
  91         ecnode = doc.createElement("experiment")
  92         ecnode.setAttribute("exp_id", xmlencode(ec.exp_id))
  93         ecnode.setAttribute("run_id", xmlencode(ec.run_id))
  94         ecnode.setAttribute("nthreads", xmlencode(ec.nthreads))
  95         ecnode.setAttribute("local_dir", xmlencode(ec.local_dir))
  96         doc.appendChild(ecnode)
  97
  98         if ec.netgraph != None:
  99             self._netgraph_to_xml(doc, ecnode, ec)
 100
 101         rmsnode = doc.createElement("rms")
 102         ecnode.appendChild(rmsnode)
 103
 104         for guid, rm in ec._resources.iteritems():
 105             self._rm_to_xml(doc, rmsnode, ec, guid, rm)
 106
 107         return doc
 108
 109     def _netgraph_to_xml(self, doc, ecnode, ec):
 110         ngnode = doc.createElement("topology")
 111         ngnode.setAttribute("topo-type", xmlencode(ec.netgraph.topo_type))
 112         ecnode.appendChild(ngnode)
 113
 114         self. _netgraph_nodes_to_xml(doc, ngnode, ec)
 115         self. _netgraph_edges_to_xml(doc, ngnode, ec)
 116
 117     def _netgraph_nodes_to_xml(self, doc, ngnode, ec):
 118         ngnsnode = doc.createElement("nodes")
 119         ngnode.appendChild(ngnsnode)
 120
 121         for nid in ec.netgraph.nodes():
 122             ngnnode = doc.createElement("node")
 123             ngnnode.setAttribute("nid", xmlencode(nid))
 124             ngnsnode.appendChild(ngnnode)
 125
 126             # Mark ources and targets
 127             if ec.netgraph.is_source(nid):
 128                 ngnnode.setAttribute("source", xmlencode(True))
 129
 130             if ec.netgraph.is_target(nid):
 131                 ngnnode.setAttribute("target", xmlencode(True))
 132
 133             # Node annotations
 134             annosnode = doc.createElement("node-annotations")
 135             add_annotations = False
 136             for name in ec.netgraph.node_annotations(nid):
 137                 add_annotations = True
 138                 value = ec.netgraph.node_annotation(nid, name)
 139                 annonode = doc.createElement("node-annotation")
 140                 annonode.setAttribute("name", xmlencode(name))
 141                 annonode.setAttribute("value", xmlencode(value))
 142                 annonode.setAttribute("type", from_type(value))
 143                 annosnode.appendChild(annonode)
 144
 145             if add_annotations:
 146                 ngnnode.appendChild(annosnode)
 147
 148     def _netgraph_edges_to_xml(self, doc, ngnode, ec):
 149         ngesnode = doc.createElement("edges")
 150         ngnode.appendChild(ngesnode)
 151
 152         for nid1, nid2 in ec.netgraph.edges():
 153             ngenode = doc.createElement("edge")
 154             ngenode.setAttribute("nid1", xmlencode(nid1))
 155             ngenode.setAttribute("nid2", xmlencode(nid2))
 156             ngesnode.appendChild(ngenode)
 157
 158             # Edge annotations
 159             annosnode = doc.createElement("edge-annotations")
 160             add_annotations = False
 161             for name in ec.netgraph.edge_annotations(nid1, nid2):
 162                 add_annotations = True
 163                 value = ec.netgraph.edge_annotation(nid1, nid2, name)
 164                 annonode = doc.createElement("edge-annotation")
 165                 annonode.setAttribute("name", xmlencode(name))
 166                 annonode.setAttribute("value", xmlencode(value))
 167                 annonode.setAttribute("type", from_type(value))
 168                 annosnode.appendChild(annonode)
 169
 170             if add_annotations:
 171                 ngenode.appendChild(annosnode)
 172
 173     def _rm_to_xml(self, doc, rmsnode, ec, guid, rm):
 174         rmnode = doc.createElement("rm")
 175         rmnode.setAttribute("guid", xmlencode(guid))
 176         rmnode.setAttribute("rtype", xmlencode(rm._rtype))
 177         rmnode.setAttribute("state", xmlencode(rm._state))
 178         if rm._start_time:
 179             rmnode.setAttribute("start_time", xmlencode(rm._start_time))
 180         if rm._stop_time:
 181             rmnode.setAttribute("stop_time", xmlencode(rm._stop_time))
 182         if rm._discover_time:
 183             rmnode.setAttribute("discover_time", xmlencode(rm._discover_time))
 184         if rm._provision_time:
 185             rmnode.setAttribute("provision_time", xmlencode(rm._provision_time))
 186         if rm._ready_time:
 187             rmnode.setAttribute("ready_time", xmlencode(rm._ready_time))
 188         if rm._release_time:
 189             rmnode.setAttribute("release_time", xmlencode(rm._release_time))
 190         if rm._failed_time:
 191             rmnode.setAttribute("failed_time", xmlencode(rm._failed_time))
 192         rmsnode.appendChild(rmnode)
 193
 194         anode = doc.createElement("attributes")
 195         attributes = False
 196
 197         for attr in rm._attrs.values():
 198             if attr.has_changed:
 199                 attributes = True
 200                 aanode = doc.createElement("attribute")
 201                 aanode.setAttribute("name", xmlencode(attr.name))
 202                 aanode.setAttribute("value", xmlencode(attr.value))
 203                 aanode.setAttribute("type", from_type(attr.value))
 204                 anode.appendChild(aanode)
 205
 206         if attributes:
 207             rmnode.appendChild(anode)
 208
 209         cnode = doc.createElement("connections")
 210         connections = False
 211
 212         for guid in rm._connections:
 213             connections = True
 214             ccnode = doc.createElement("connection")
 215             ccnode.setAttribute("guid", xmlencode(guid))
 216             cnode.appendChild(ccnode)
 217
 218         if connections:
 219            rmnode.appendChild(cnode)
 220
 221         cnnode = doc.createElement("conditions")
 222         conditions = False
 223
 224         for action, conds in rm._conditions.iteritems():
 225             conditions = True
 226             for (group, state, time) in conds:
 227                 ccnnode = doc.createElement("condition")
 228                 ccnnode.setAttribute("action", xmlencode(action))
 229                 ccnnode.setAttribute("group", xmlencode(group))
 230                 ccnnode.setAttribute("state", xmlencode(state))
 231                 ccnnode.setAttribute("time", xmlencode(time))
 232                 cnnode.appendChild(ccnnode)
 233
 234         if conditions:
 235            rmnode.appendChild(cnnode)
 236
 237         tnode = doc.createElement("traces")
 238         traces = False
 239
 240         for trace in rm._trcs.values():
 241             if trace.enabled:
 242                 traces = True
 243                 ttnode = doc.createElement("trace")
 244                 ttnode.setAttribute("name", xmlencode(trace.name))
 245                 tnode.appendChild(ttnode)
 246
 247         if traces:
 248             rmnode.appendChild(tnode)
 249
 250     def from_xml(self, xml):
 251         doc = minidom.parseString(xml)
 252         return self._ec_from_xml(doc)
 253
 254     def _ec_from_xml(self, doc):
 255         from nepi.execution.ec import ExperimentController
 256         ec = None
 257
 258         ecnode_list = doc.getElementsByTagName("experiment")
 259         for ecnode in ecnode_list:
 260             if ecnode.nodeType == doc.ELEMENT_NODE:
 261                 exp_id = xmldecode(ecnode.getAttribute("exp_id"))
 262                 run_id = xmldecode(ecnode.getAttribute("run_id"))
 263                 local_dir = xmldecode(ecnode.getAttribute("local_dir"))
 264
 265                 # Configure number of preocessing threads
 266                 nthreads = xmldecode(ecnode.getAttribute("nthreads"))
 267                 os.environ["NEPI_NTHREADS"] = nthreads
 268
 269                 # Deserialize netgraph
 270                 netgraph = self._netgraph_from_xml(doc, ecnode)
 271                 topo_type = netgraph.topo_type if netgraph else None
 272
 273                 # Instantiate EC
 274                 ec = ExperimentController(exp_id = exp_id, local_dir = local_dir,
 275                         topology = netgraph.topology, topo_type = topo_type)
 276
 277                 connections = set()
 278
 279                 rmsnode_list = ecnode.getElementsByTagName("rms")
 280                 if rmsnode_list:
 281                     rmnode_list = rmsnode_list[0].getElementsByTagName("rm")
 282                     for rmnode in rmnode_list:
 283                         if rmnode.nodeType == doc.ELEMENT_NODE:
 284                             self._rm_from_xml(doc, rmnode, ec, connections)
 285
 286                 for (guid1, guid2) in connections:
 287                     ec.register_connection(guid1, guid2)
 288
 289                 break
 290
 291         return ec
 292
 293     def _netgraph_from_xml(self, doc, ecnode):
 294         netgraph = None
 295
 296         topology = ecnode.getElementsByTagName("topology")
 297         if topology:
 298             topology = topology[0]
 299             topo_type = xmldecode(topology.getAttribute("topo-type"))
 300
 301             netgraph = NetGraph(topo_type = topo_type)
 302
 303             ngnsnode_list = topology.getElementsByTagName("nodes")
 304             if ngnsnode_list:
 305                 ngnsnode = ngnsnode_list[0].getElementsByTagName("node")
 306                 for ngnnode in ngnsnode:
 307                     nid = xmldecode(ngnnode.getAttribute("nid"))
 308                     netgraph.add_node(nid)
 309
 310                     if ngnnode.hasAttribute("source"):
 311                         netgraph.set_source(nid)
 312                     if ngnnode.hasAttribute("target"):
 313                         netgraph.set_target(nid)
 314
 315                     annosnode_list = ngnnode.getElementsByTagName("node-annotations")
 316
 317                     if annosnode_list:
 318                         annosnode = annosnode_list[0].getElementsByTagName("node-annotation")
 319                         for annonode in annosnode:
 320                             name = xmldecode(annonode.getAttribute("name"))
 321
 322                             if name == "ips":
 323                                 ips = xmldecode(annonode.getAttribute("value"), eval) # list
 324                                 for ip in ips:
 325                                     netgraph.annotate_node_ip(nid, ip)
 326                             else:
 327                                 value = xmldecode(annonode.getAttribute("value"))
 328                                 tipe = xmldecode(annonode.getAttribute("type"))
 329                                 value = to_type(tipe, value)
 330                                 netgraph.annotate_node(nid, name, value)
 331
 332             ngesnode_list = topology.getElementsByTagName("edges")
 333             if ngesnode_list:
 334                 ngesnode = ngesnode_list[0].getElementsByTagName("edge")
 335                 for ngenode in ngesnode:
 336                     nid1 = xmldecode(ngenode.getAttribute("nid1"))
 337                     nid2 = xmldecode(ngenode.getAttribute("nid2"))
 338                     netgraph.add_edge(nid1, nid2)
 339
 340                     annosnode_list = ngenode.getElementsByTagName("edge-annotations")
 341                     if annosnode_list:
 342                         annosnode = annosnode_list[0].getElementsByTagName("edge-annotation")
 343                         for annonode in annosnode:
 344                             name = xmldecode(annonode.getAttribute("name"))
 345
 346                             if name == "net":
 347                                 net = xmldecode(annonode.getAttribute("value"), eval) # dict
 348                                 netgraph.annotate_edge_net(nid1, nid2, net[nid1], net[nid2],
 349                                         net["mask"], net["network"], net["prefix"])
 350                             else:
 351                                 value = xmldecode(annonode.getAttribute("value"))
 352                                 tipe = xmldecode(annonode.getAttribute("type"))
 353                                 value = to_type(tipe, value)
 354                                 netgraph.annotate_edge(nid1, nid2, name, value)
 355         return netgraph
 356
 357     def _rm_from_xml(self, doc, rmnode, ec, connections):
 358         start_time = None
 359         stop_time = None
 360         discover_time = None
 361         provision_time = None
 362         ready_time = None
 363         release_time = None
 364         failed_time = None
 365
 366         guid = xmldecode(rmnode.getAttribute("guid"), int)
 367         rtype = xmldecode(rmnode.getAttribute("rtype"))
 368
 369         # FOR NOW ONLY STATE NEW IS ALLOWED
 370         state = 0
 371         """
 372         state = xmldecode(rmnode.getAttribute("state"), int)
 373
 374         if rmnode.hasAttribute("start_time"):
 375             start_time = xmldecode(rmnode.getAttribute("start_time"),
 376                     datetime.datetime)
 377         if rmnode.hasAttribute("stop_time"):
 378             stop_time = xmldecode(rmnode.getAttribute("stop_time"),
 379                     datetime.datetime)
 380         if rmnode.hasAttribute("discover_time"):
 381             dicover_time = xmldecode(rmnode.getAttribute("discover_time"),
 382                     datetime.datetime)
 383         if rmnode.hasAttribute("provision_time"):
 384             provision_time = xmldecode(rmnode.getAttribute("provision_time"),
 385                     datetime.datetime)
 386         if rmnode.hasAttribute("ready_time"):
 387             ready_time = xmldecode(rmnode.getAttribute("ready_time"),
 388                     datetime.datetime)
 389         if rmnode.hasAttribute("release_time"):
 390             release_time = xmldecode(rmnode.getAttribute("release_time"),
 391                     datetime.datetime)
 392         if rmnode.hasAttribute("failed_time"):
 393             failed_time = xmldecode(rmnode.getAttribute("failed_time"),
 394                     datetime.datetime)
 395         """
 396
 397         ec.register_resource(rtype, guid = guid)
 398         rm = ec.get_resource(guid)
 399         rm.set_state_time(state, "_start_time", start_time)
 400         rm.set_state_time(state, "_stop_time", stop_time)
 401         rm.set_state_time(state, "_discover_time", discover_time)
 402         rm.set_state_time(state, "_provision_time", provision_time)
 403         rm.set_state_time(state, "_ready_time", ready_time)
 404         rm.set_state_time(state, "_release_time", release_time)
 405         rm.set_state_time(state, "_failed_time", failed_time)
 406
 407         anode_list = rmnode.getElementsByTagName("attributes")
 408         if anode_list:
 409             aanode_list = anode_list[0].getElementsByTagName("attribute")
 410             for aanode in aanode_list:
 411                 name = xmldecode(aanode.getAttribute("name"))
 412                 value = xmldecode(aanode.getAttribute("value"))
 413                 tipe = xmldecode(aanode.getAttribute("type"))
 414                 value = to_type(tipe, value)
 415                 rm.set(name, value)
 416
 417         cnode_list = rmnode.getElementsByTagName("connections")
 418         if cnode_list:
 419             ccnode_list = cnode_list[0].getElementsByTagName("connection")
 420             for ccnode in ccnode_list:
 421                 guid2 = xmldecode(ccnode.getAttribute("guid"), int)
 422                 connections.add((guid, guid2))
 423
 424         tnode_list = rmnode.getElementsByTagName("traces")
 425         if tnode_list:
 426             ttnode_list = tnode_list[0].getElementsByTagName("trace")
 427             for ttnode in ttnode_list:
 428                 name = xmldecode(ttnode.getAttribute("name"))
 429                 ec.enable_trace(guid, name)
 430
 431         cnnode_list = rmnode.getElementsByTagName("conditions")
 432         if cnnode_list:
 433             ccnnode_list = cnnode_list[0].getElementsByTagName("condition")
 434             for ccnnode in ccnnode_list:
 435                 action = xmldecode(ccnnode.getAttribute("action"), int)
 436                 group = xmldecode(ccnnode.getAttribute("group"), eval) # list
 437                 state = xmldecode(ccnnode.getAttribute("state"), int)
 438                 time = xmldecode(ccnnode.getAttribute("time"))
 439                 time = to_type('STRING', time)
 440                 ec.register_condition(guid, action, group, state, time = time)
 441