src/nepi/core/execute.py

   1 #!/usr/bin/env python
   2 # -*- coding: utf-8 -*-
   3
   4 from nepi.core.attributes import Attribute, AttributesMap
   5 from nepi.core.connector import ConnectorTypeBase
   6 from nepi.util import validation
   7 from nepi.util.constants import STATUS_FINISHED, TIME_NOW
   8 from nepi.util.parser._xml import XmlExperimentParser
   9 import sys
  10 import re
  11 import threading
  12 import ConfigParser
  13 import os
  14 import collections
  15 import functools
  16
  17 ATTRIBUTE_PATTERN_BASE = re.compile(r"\{#\[(?P<label>[-a-zA-Z0-9._]*)\](?P<expr>(?P<component>\.addr\[[0-9]+\]|\.route\[[0-9]+\]|\.trace\[[0-9]+\])?.\[(?P<attribute>[-a-zA-Z0-9._]*)\])#}")
  18 ATTRIBUTE_PATTERN_GUID_SUB = r"{#[%(guid)s]%(expr)s#}"
  19 COMPONENT_PATTERN = re.compile(r"(?P<kind>[a-z]*)\[(?P<index>.*)\]")
  20
  21 class ConnectorType(ConnectorTypeBase):
  22     def __init__(self, testbed_id, factory_id, name, max = -1, min = 0):
  23         super(ConnectorType, self).__init__(testbed_id, factory_id, name, max, min)
  24         # from_connections -- connections where the other connector is the "From"
  25         # to_connections -- connections where the other connector is the "To"
  26         # keys in the dictionary correspond to the
  27         # connector_type_id for possible connections. The value is a tuple:
  28         # (can_cross, connect)
  29         # can_cross: indicates if the connection is allowed accros different
  30         #    testbed instances
  31         # code: is the connection function to be invoked when the elements
  32         #    are connected
  33         self._from_connections = dict()
  34         self._to_connections = dict()
  35
  36     def add_from_connection(self, testbed_id, factory_id, name, can_cross,
  37             init_code, compl_code):
  38         type_id = self.make_connector_type_id(testbed_id, factory_id, name)
  39         self._from_connections[type_id] = (can_cross, init_code, compl_code)
  40
  41     def add_to_connection(self, testbed_id, factory_id, name, can_cross,
  42             init_code, compl_code):
  43         type_id = self.make_connector_type_id(testbed_id, factory_id, name)
  44         self._to_connections[type_id] = (can_cross, init_code, compl_code)
  45
  46     def can_connect(self, testbed_id, factory_id, name, count,
  47             must_cross):
  48         connector_type_id = self.make_connector_type_id(testbed_id, factory_id, name)
  49         for lookup_type_id in self._type_resolution_order(connector_type_id):
  50             if lookup_type_id in self._from_connections:
  51                 (can_cross, init_code, compl_code) = self._from_connections[lookup_type_id]
  52             elif lookup_type_id in self._to_connections:
  53                 (can_cross, init_code, compl_code) = self._to_connections[lookup_type_id]
  54             else:
  55                 # keep trying
  56                 continue
  57             return not must_cross or can_cross
  58         else:
  59             return False
  60
  61     def _connect_to_code(self, testbed_id, factory_id, name,
  62             must_cross):
  63         connector_type_id = self.make_connector_type_id(testbed_id, factory_id, name)
  64         for lookup_type_id in self._type_resolution_order(connector_type_id):
  65             if lookup_type_id in self._to_connections:
  66                 (can_cross, init_code, compl_code) = self._to_connections[lookup_type_id]
  67                 if not must_cross or can_cross:
  68                     return (init_code, compl_code)
  69         else:
  70             return (False, False)
  71
  72     def connect_to_init_code(self, testbed_id, factory_id, name, must_cross):
  73         return self._connect_to_code(testbed_id, factory_id, name, must_cross)[0]
  74
  75     def connect_to_compl_code(self, testbed_id, factory_id, name, must_cross):
  76         return self._connect_to_code(testbed_id, factory_id, name, must_cross)[1]
  77
  78 class Factory(AttributesMap):
  79     def __init__(self, factory_id, create_function, start_function,
  80             stop_function, status_function,
  81             configure_function, preconfigure_function,
  82             prestart_function,
  83             allow_addresses = False, has_addresses = False,
  84             allow_routes = False, has_routes = False):
  85         super(Factory, self).__init__()
  86         self._factory_id = factory_id
  87         self._allow_addresses = bool(allow_addresses)
  88         self._allow_routes = bool(allow_routes)
  89         self._has_addresses = bool(has_addresses) or self._allow_addresses
  90         self._has_routes = bool(has_routes) or self._allow_routes
  91         self._create_function = create_function
  92         self._start_function = start_function
  93         self._stop_function = stop_function
  94         self._status_function = status_function
  95         self._configure_function = configure_function
  96         self._preconfigure_function = preconfigure_function
  97         self._prestart_function = prestart_function
  98         self._connector_types = dict()
  99         self._traces = list()
 100         self._tags = list()
 101         self._box_attributes = AttributesMap()
 102
 103     @property
 104     def factory_id(self):
 105         return self._factory_id
 106
 107     @property
 108     def allow_addresses(self):
 109         return self._allow_addresses
 110
 111     @property
 112     def allow_routes(self):
 113         return self._allow_routes
 114
 115     @property
 116     def has_addresses(self):
 117         return self._has_addresses
 118
 119     @property
 120     def has_routes(self):
 121         return self._has_routes
 122
 123     @property
 124     def box_attributes(self):
 125         return self._box_attributes
 126
 127     @property
 128     def create_function(self):
 129         return self._create_function
 130
 131     @property
 132     def prestart_function(self):
 133         return self._prestart_function
 134
 135     @property
 136     def start_function(self):
 137         return self._start_function
 138
 139     @property
 140     def stop_function(self):
 141         return self._stop_function
 142
 143     @property
 144     def status_function(self):
 145         return self._status_function
 146
 147     @property
 148     def configure_function(self):
 149         return self._configure_function
 150
 151     @property
 152     def preconfigure_function(self):
 153         return self._preconfigure_function
 154
 155     @property
 156     def traces(self):
 157         return self._traces
 158
 159     @property
 160     def tags(self):
 161         return self._tags
 162
 163     def connector_type(self, name):
 164         return self._connector_types[name]
 165
 166     def add_connector_type(self, connector_type):
 167         self._connector_types[connector_type.name] = connector_type
 168
 169     def add_trace(self, trace_id):
 170         self._traces.append(trace_id)
 171
 172     def add_tag(self, tag_id):
 173         self._tags.append(tag_id)
 174
 175     def add_box_attribute(self, name, help, type, value = None, range = None,
 176         allowed = None, flags = Attribute.NoFlags, validation_function = None,
 177         category = None):
 178         self._box_attributes.add_attribute(name, help, type, value, range,
 179                 allowed, flags, validation_function, category)
 180
 181 class TestbedController(object):
 182     def __init__(self, testbed_id, testbed_version):
 183         self._testbed_id = testbed_id
 184         self._testbed_version = testbed_version
 185
 186     @property
 187     def testbed_id(self):
 188         return self._testbed_id
 189
 190     @property
 191     def testbed_version(self):
 192         return self._testbed_version
 193
 194     @property
 195     def guids(self):
 196         raise NotImplementedError
 197
 198     def defer_configure(self, name, value):
 199         """Instructs setting a configuartion attribute for the testbed instance"""
 200         raise NotImplementedError
 201
 202     def defer_create(self, guid, factory_id):
 203         """Instructs creation of element """
 204         raise NotImplementedError
 205
 206     def defer_create_set(self, guid, name, value):
 207         """Instructs setting an initial attribute on an element"""
 208         raise NotImplementedError
 209
 210     def defer_factory_set(self, guid, name, value):
 211         """Instructs setting an attribute on a factory"""
 212         raise NotImplementedError
 213
 214     def defer_connect(self, guid1, connector_type_name1, guid2,
 215             connector_type_name2):
 216         """Instructs creation of a connection between the given connectors"""
 217         raise NotImplementedError
 218
 219     def defer_cross_connect(self,
 220             guid, connector_type_name,
 221             cross_guid, cross_testbed_guid,
 222             cross_testbed_id, cross_factory_id,
 223             cross_connector_type_name):
 224         """
 225         Instructs creation of a connection between the given connectors
 226         of different testbed instances
 227         """
 228         raise NotImplementedError
 229
 230     def defer_add_trace(self, guid, trace_id):
 231         """Instructs the addition of a trace"""
 232         raise NotImplementedError
 233
 234     def defer_add_address(self, guid, address, netprefix, broadcast):
 235         """Instructs the addition of an address"""
 236         raise NotImplementedError
 237
 238     def defer_add_route(self, guid, destination, netprefix, nexthop):
 239         """Instructs the addition of a route"""
 240         raise NotImplementedError
 241
 242     def do_setup(self):
 243         """After do_setup the testbed initial configuration is done"""
 244         raise NotImplementedError
 245
 246     def do_create(self):
 247         """
 248         After do_create all instructed elements are created and
 249         attributes setted
 250         """
 251         raise NotImplementedError
 252
 253     def do_connect_init(self):
 254         """
 255         After do_connect_init all internal connections between testbed elements
 256         are initiated
 257         """
 258         raise NotImplementedError
 259
 260     def do_connect_compl(self):
 261         """
 262         After do_connect all internal connections between testbed elements
 263         are completed
 264         """
 265         raise NotImplementedError
 266
 267     def do_preconfigure(self):
 268         """
 269         Done just before resolving netrefs, after connection, before cross connections,
 270         useful for early stages of configuration, for setting up stuff that might be
 271         required for netref resolution.
 272         """
 273         raise NotImplementedError
 274
 275     def do_configure(self):
 276         """After do_configure elements are configured"""
 277         raise NotImplementedError
 278
 279     def do_prestart(self):
 280         """Before do_start elements are prestart-configured"""
 281         raise NotImplementedError
 282
 283     def do_cross_connect_init(self, cross_data):
 284         """
 285         After do_cross_connect_init initiation of all external connections
 286         between different testbed elements is performed
 287         """
 288         raise NotImplementedError
 289
 290     def do_cross_connect_compl(self, cross_data):
 291         """
 292         After do_cross_connect_compl completion of all external connections
 293         between different testbed elements is performed
 294         """
 295         raise NotImplementedError
 296
 297     def start(self):
 298         raise NotImplementedError
 299
 300     def stop(self):
 301         raise NotImplementedError
 302
 303     def set(self, guid, name, value, time = TIME_NOW):
 304         raise NotImplementedError
 305
 306     def get(self, guid, name, time = TIME_NOW):
 307         raise NotImplementedError
 308
 309     def get_route(self, guid, index, attribute):
 310         """
 311         Params:
 312
 313             guid: guid of box to query
 314             index: number of routing entry to fetch
 315             attribute: one of Destination, NextHop, NetPrefix
 316         """
 317         raise NotImplementedError
 318
 319     def get_address(self, guid, index, attribute='Address'):
 320         """
 321         Params:
 322
 323             guid: guid of box to query
 324             index: number of inteface to select
 325             attribute: one of Address, NetPrefix, Broadcast
 326         """
 327         raise NotImplementedError
 328
 329     def get_attribute_list(self, guid):
 330         raise NotImplementedError
 331
 332     def get_factory_id(self, guid):
 333         raise NotImplementedError
 334
 335     def action(self, time, guid, action):
 336         raise NotImplementedError
 337
 338     def status(self, guid):
 339         raise NotImplementedError
 340
 341     def trace(self, guid, trace_id, attribute='value'):
 342         raise NotImplementedError
 343
 344     def traces_info(self):
 345         """ dictionary of dictionaries:
 346             traces_info = dict({
 347                 guid = dict({
 348                     trace_id = dict({
 349                             host = host,
 350                             filepath = filepath,
 351                             filesize = size in bytes,
 352                         })
 353                 })
 354             })"""
 355         raise NotImplementedError
 356
 357     def shutdown(self):
 358         raise NotImplementedError
 359
 360 class ExperimentController(object):
 361     def __init__(self, experiment_xml, root_dir):
 362         self._experiment_xml = experiment_xml
 363         self._testbeds = dict()
 364         self._deployment_config = dict()
 365         self._netrefs = collections.defaultdict(set)
 366         self._testbed_netrefs = collections.defaultdict(set)
 367         self._cross_data = dict()
 368         self._root_dir = root_dir
 369         self._netreffed_testbeds = set()
 370         self._guids_in_testbed_cache = dict()
 371
 372         self.persist_experiment_xml()
 373
 374     @property
 375     def experiment_xml(self):
 376         return self._experiment_xml
 377
 378     @property
 379     def guids(self):
 380         guids = list()
 381         for testbed_guid in self._testbeds.keys():
 382             _guids = self._guids_in_testbed(testbed_guid)
 383             if _guids:
 384                 guids.extend(_guids)
 385         return guids
 386
 387     def persist_experiment_xml(self):
 388         xml_path = os.path.join(self._root_dir, "experiment.xml")
 389         f = open(xml_path, "w")
 390         f.write(self._experiment_xml)
 391         f.close()
 392
 393     def trace(self, guid, trace_id, attribute='value'):
 394         testbed = self._testbed_for_guid(guid)
 395         if testbed != None:
 396             return testbed.trace(guid, trace_id, attribute)
 397         raise RuntimeError("No element exists with guid %d" % guid)
 398
 399     def traces_info(self):
 400         traces_info = dict()
 401         for guid, testbed in self._testbeds.iteritems():
 402             tinfo = testbed.traces_info()
 403             if tinfo:
 404                 traces_info[guid] = testbed.traces_info()
 405         return traces_info
 406
 407     @staticmethod
 408     def _parallel(callables):
 409         excs = []
 410         def wrap(callable):
 411             @functools.wraps(callable)
 412             def wrapped(*p, **kw):
 413                 try:
 414                     callable(*p, **kw)
 415                 except:
 416                     import traceback
 417                     traceback.print_exc(file=sys.stderr)
 418                     excs.append(sys.exc_info())
 419             return wrapped
 420         threads = [ threading.Thread(target=wrap(callable)) for callable in callables ]
 421         for thread in threads:
 422             thread.start()
 423         for thread in threads:
 424             thread.join()
 425         for exc in excs:
 426             eTyp, eVal, eLoc = exc
 427             raise eTyp, eVal, eLoc
 428
 429     def start(self):
 430         parser = XmlExperimentParser()
 431         data = parser.from_xml_to_data(self._experiment_xml)
 432
 433         self._init_testbed_controllers(data)
 434
 435         # persist testbed connection data, for potential recovery
 436         self._persist_testbed_proxies()
 437
 438         def steps_to_configure(self, allowed_guids):
 439             # perform setup in parallel for all test beds,
 440             # wait for all threads to finish
 441             self._parallel([testbed.do_setup
 442                             for guid,testbed in self._testbeds.iteritems()
 443                             if guid in allowed_guids])
 444
 445             # perform create-connect in parallel, wait
 446             # (internal connections only)
 447             self._parallel([testbed.do_create
 448                             for guid,testbed in self._testbeds.iteritems()
 449                             if guid in allowed_guids])
 450
 451             self._parallel([testbed.do_connect_init
 452                             for guid,testbed in self._testbeds.iteritems()
 453                             if guid in allowed_guids])
 454
 455             self._parallel([testbed.do_connect_compl
 456                             for guid,testbed in self._testbeds.iteritems()
 457                             if guid in allowed_guids])
 458
 459             self._parallel([testbed.do_preconfigure
 460                             for guid,testbed in self._testbeds.iteritems()
 461                             if guid in allowed_guids])
 462             self._clear_caches()
 463
 464         steps_to_configure(self, self._testbeds)
 465
 466         if self._netreffed_testbeds:
 467             # initally resolve netrefs
 468             self.do_netrefs(data, fail_if_undefined=False)
 469
 470             # rinse and repeat, for netreffed testbeds
 471             netreffed_testbeds = set(self._netreffed_testbeds)
 472
 473             self._init_testbed_controllers(data)
 474
 475             # persist testbed connection data, for potential recovery
 476             self._persist_testbed_proxies()
 477
 478             # configure dependant testbeds
 479             steps_to_configure(self, netreffed_testbeds)
 480
 481         # final netref step, fail if anything's left unresolved
 482         self.do_netrefs(data, fail_if_undefined=True)
 483
 484         self._program_testbed_cross_connections(data)
 485
 486         # perform do_configure in parallel for al testbeds
 487         # (it's internal configuration for each)
 488         self._parallel([testbed.do_configure
 489                         for testbed in self._testbeds.itervalues()])
 490
 491         self._clear_caches()
 492
 493         #print >>sys.stderr, "DO IT"
 494         #import time
 495         #time.sleep(60)
 496
 497         # cross-connect (cannot be done in parallel)
 498         for guid, testbed in self._testbeds.iteritems():
 499             cross_data = self._get_cross_data(guid)
 500             testbed.do_cross_connect_init(cross_data)
 501         for guid, testbed in self._testbeds.iteritems():
 502             cross_data = self._get_cross_data(guid)
 503             testbed.do_cross_connect_compl(cross_data)
 504
 505         self._clear_caches()
 506
 507         # Last chance to configure (parallel on all testbeds)
 508         self._parallel([testbed.do_prestart
 509                         for testbed in self._testbeds.itervalues()])
 510
 511         self._clear_caches()
 512
 513         # start experiment (parallel start on all testbeds)
 514         self._parallel([testbed.start
 515                         for testbed in self._testbeds.itervalues()])
 516
 517         self._clear_caches()
 518
 519     def _clear_caches(self):
 520         # Cleaning cache for safety.
 521         self._guids_in_testbed_cache = dict()
 522
 523     def _persist_testbed_proxies(self):
 524         TRANSIENT = ('Recover',)
 525
 526         # persist access configuration for all testbeds, so that
 527         # recovery mode can reconnect to them if it becomes necessary
 528         conf = ConfigParser.RawConfigParser()
 529         for testbed_guid, testbed_config in self._deployment_config.iteritems():
 530             testbed_guid = str(testbed_guid)
 531             conf.add_section(testbed_guid)
 532             for attr in testbed_config.attributes_list:
 533                 if attr not in TRANSIENT:
 534                     conf.set(testbed_guid, attr,
 535                         testbed_config.get_attribute_value(attr))
 536
 537         f = open(os.path.join(self._root_dir, 'deployment_config.ini'), 'w')
 538         conf.write(f)
 539         f.close()
 540
 541     def _load_testbed_proxies(self):
 542         TYPEMAP = {
 543             STRING : 'get',
 544             INTEGER : 'getint',
 545             FLOAT : 'getfloat',
 546             BOOLEAN : 'getboolean',
 547         }
 548
 549         # deferred import because proxy needs
 550         # our class definitions to define proxies
 551         import nepi.util.proxy as proxy
 552
 553         conf = ConfigParser.RawConfigParser()
 554         conf.read(os.path.join(self._root_dir, 'deployment_config.ini'))
 555         for testbed_guid in conf.sections():
 556             testbed_config = proxy.AccessConfiguration()
 557             for attr in conf.options(testbed_guid):
 558                 testbed_config.set_attribute_value(attr,
 559                     conf.get(testbed_guid, attr) )
 560
 561             testbed_guid = str(testbed_guid)
 562             conf.add_section(testbed_guid)
 563             for attr in testbed_config.attributes_list:
 564                 if attr not in TRANSIENT:
 565                     getter = getattr(conf, TYPEMAP.get(
 566                         testbed_config.get_attribute_type(attr),
 567                         'get') )
 568                     testbed_config.set_attribute_value(
 569                         testbed_guid, attr, getter(attr))
 570
 571     def _unpersist_testbed_proxies(self):
 572         try:
 573             os.remove(os.path.join(self._root_dir, 'deployment_config.ini'))
 574         except:
 575             # Just print exceptions, this is just cleanup
 576             import traceback
 577             ######## BUG ##########
 578             #BUG: If the next line is uncomented pyQt explodes when shutting down the experiment !!!!!!!!
 579             #traceback.print_exc(file=sys.stderr)
 580
 581     def stop(self):
 582        for testbed in self._testbeds.values():
 583            testbed.stop()
 584        self._unpersist_testbed_proxies()
 585
 586     def recover(self):
 587         # reload perviously persisted testbed access configurations
 588         self._load_testbed_proxies()
 589
 590         # recreate testbed proxies by reconnecting only
 591         self._init_testbed_controllers(recover = True)
 592
 593         # another time, for netrefs
 594         self._init_testbed_controllers(recover = True)
 595
 596     def is_finished(self, guid):
 597         testbed = self._testbed_for_guid(guid)
 598         if testbed != None:
 599             return testbed.status(guid) == STATUS_FINISHED
 600         raise RuntimeError("No element exists with guid %d" % guid)
 601
 602     def set(self, guid, name, value, time = TIME_NOW):
 603         testbed = self._testbed_for_guid(guid)
 604         if testbed != None:
 605             testbed.set(guid, name, value, time)
 606         else:
 607             raise RuntimeError("No element exists with guid %d" % guid)
 608
 609     def get(self, guid, name, time = TIME_NOW):
 610         testbed = self._testbed_for_guid(guid)
 611         if testbed != None:
 612             return testbed.get(guid, name, time)
 613         raise RuntimeError("No element exists with guid %d" % guid)
 614
 615     def get_factory_id(self, guid):
 616         testbed = self._testbed_for_guid(guid)
 617         if testbed != None:
 618             return testbed.get_factory_id(guid)
 619         raise RuntimeError("No element exists with guid %d" % guid)
 620
 621     def get_testbed_id(self, guid):
 622         testbed = self._testbed_for_guid(guid)
 623         if testbed != None:
 624             return testbed.testbed_id
 625         raise RuntimeError("No element exists with guid %d" % guid)
 626
 627     def get_testbed_version(self, guid):
 628         testbed = self._testbed_for_guid(guid)
 629         if testbed != None:
 630             return testbed.testbed_version
 631         raise RuntimeError("No element exists with guid %d" % guid)
 632
 633     def shutdown(self):
 634         exceptions = list()
 635         for testbed in self._testbeds.values():
 636             try:
 637                 testbed.shutdown()
 638             except:
 639                 exceptions.append(sys.exc_info())
 640         for exc_info in exceptions:
 641             raise exc_info[0], exc_info[1], exc_info[2]
 642
 643     def _testbed_for_guid(self, guid):
 644         for testbed_guid in self._testbeds.keys():
 645             if guid in self._guids_in_testbed(testbed_guid):
 646                 return self._testbeds[testbed_guid]
 647         return None
 648
 649     def _guids_in_testbed(self, testbed_guid):
 650         if testbed_guid not in self._testbeds:
 651             return set()
 652         if testbed_guid not in self._guids_in_testbed_cache:
 653             self._guids_in_testbed_cache[testbed_guid] = \
 654                 set(self._testbeds[testbed_guid].guids)
 655         return self._guids_in_testbed_cache[testbed_guid]
 656
 657     @staticmethod
 658     def _netref_component_split(component):
 659         match = COMPONENT_PATTERN.match(component)
 660         if match:
 661             return match.group("kind"), match.group("index")
 662         else:
 663             return component, None
 664
 665     _NETREF_COMPONENT_GETTERS = {
 666         'addr':
 667             lambda testbed, guid, index, name:
 668                 testbed.get_address(guid, int(index), name),
 669         'route' :
 670             lambda testbed, guid, index, name:
 671                 testbed.get_route(guid, int(index), name),
 672         'trace' :
 673             lambda testbed, guid, index, name:
 674                 testbed.trace(guid, index, name),
 675         '' :
 676             lambda testbed, guid, index, name:
 677                 testbed.get(guid, name),
 678     }
 679
 680     def resolve_netref_value(self, value, failval = None):
 681         match = ATTRIBUTE_PATTERN_BASE.search(value)
 682         if match:
 683             label = match.group("label")
 684             if label.startswith('GUID-'):
 685                 ref_guid = int(label[5:])
 686                 if ref_guid:
 687                     expr = match.group("expr")
 688                     component = (match.group("component") or "")[1:] # skip the dot
 689                     attribute = match.group("attribute")
 690
 691                     # split compound components into component kind and index
 692                     # eg: 'addr[0]' -> ('addr', '0')
 693                     component, component_index = self._netref_component_split(component)
 694
 695                     # find object and resolve expression
 696                     for ref_testbed_guid, ref_testbed in self._testbeds.iteritems():
 697                         if component not in self._NETREF_COMPONENT_GETTERS:
 698                             raise ValueError, "Malformed netref: %r - unknown component" % (expr,)
 699                         elif ref_guid not in self._guids_in_testbed(ref_testbed_guid):
 700                             pass
 701                         else:
 702                             ref_value = self._NETREF_COMPONENT_GETTERS[component](
 703                                 ref_testbed, ref_guid, component_index, attribute)
 704                             if ref_value:
 705                                 return value.replace(match.group(), ref_value)
 706         # couldn't find value
 707         return failval
 708
 709     def do_netrefs(self, data, fail_if_undefined = False):
 710         # element netrefs
 711         for (testbed_guid, guid), attrs in self._netrefs.items():
 712             testbed = self._testbeds.get(testbed_guid)
 713             if testbed is not None:
 714                 for name in set(attrs):
 715                     value = testbed.get(guid, name)
 716                     if isinstance(value, basestring):
 717                         ref_value = self.resolve_netref_value(value)
 718                         if ref_value is not None:
 719                             testbed.set(guid, name, ref_value)
 720                             attrs.remove(name)
 721                         elif fail_if_undefined:
 722                             raise ValueError, "Unresolvable netref in: %r=%r" % (name,value,)
 723                 if not attrs:
 724                     del self._netrefs[(testbed_guid, guid)]
 725
 726         # testbed netrefs
 727         for testbed_guid, attrs in self._testbed_netrefs.items():
 728             tb_data = dict(data.get_attribute_data(testbed_guid))
 729             if data:
 730                 for name in set(attrs):
 731                     value = tb_data.get(name)
 732                     if isinstance(value, basestring):
 733                         ref_value = self.resolve_netref_value(value)
 734                         if ref_value is not None:
 735                             data.set_attribute_data(testbed_guid, name, ref_value)
 736                             attrs.remove(name)
 737                         elif fail_if_undefined:
 738                             raise ValueError, "Unresolvable netref in: %r" % (value,)
 739                 if not attrs:
 740                     del self._testbed_netrefs[testbed_guid]
 741
 742
 743     def _init_testbed_controllers(self, data, recover = False):
 744         blacklist_testbeds = set(self._testbeds)
 745         element_guids = list()
 746         label_guids = dict()
 747         data_guids = data.guids
 748
 749         # create testbed controllers
 750         for guid in data_guids:
 751             if data.is_testbed_data(guid):
 752                 if guid not in self._testbeds:
 753                     self._create_testbed_controller(guid, data, element_guids,
 754                             recover)
 755             else:
 756                 (testbed_guid, factory_id) = data.get_box_data(guid)
 757                 if testbed_guid not in blacklist_testbeds:
 758                     element_guids.append(guid)
 759                     label = data.get_attribute_data(guid, "label")
 760                     if label is not None:
 761                         if label in label_guids:
 762                             raise RuntimeError, "Label %r is not unique" % (label,)
 763                         label_guids[label] = guid
 764
 765         # replace references to elements labels for its guid
 766         self._resolve_labels(data, data_guids, label_guids)
 767
 768         # program testbed controllers
 769         if not recover:
 770             self._program_testbed_controllers(element_guids, data)
 771
 772     def _resolve_labels(self, data, data_guids, label_guids):
 773         netrefs = self._netrefs
 774         testbed_netrefs = self._testbed_netrefs
 775         for guid in data_guids:
 776             for name, value in data.get_attribute_data(guid):
 777                 if isinstance(value, basestring):
 778                     match = ATTRIBUTE_PATTERN_BASE.search(value)
 779                     if match:
 780                         label = match.group("label")
 781                         if not label.startswith('GUID-'):
 782                             ref_guid = label_guids.get(label)
 783                             if ref_guid is not None:
 784                                 value = ATTRIBUTE_PATTERN_BASE.sub(
 785                                     ATTRIBUTE_PATTERN_GUID_SUB % dict(
 786                                         guid = 'GUID-%d' % (ref_guid,),
 787                                         expr = match.group("expr"),
 788                                         label = label),
 789                                     value)
 790                                 data.set_attribute_data(guid, name, value)
 791
 792                                 # memorize which guid-attribute pairs require
 793                                 # postprocessing, to avoid excessive controller-testbed
 794                                 # communication at configuration time
 795                                 # (which could require high-latency network I/O)
 796                                 if not data.is_testbed_data(guid):
 797                                     (testbed_guid, factory_id) = data.get_box_data(guid)
 798                                     netrefs[(testbed_guid, guid)].add(name)
 799                                 else:
 800                                     testbed_netrefs[guid].add(name)
 801
 802     def _create_testbed_controller(self, guid, data, element_guids, recover):
 803         (testbed_id, testbed_version) = data.get_testbed_data(guid)
 804         deployment_config = self._deployment_config.get(guid)
 805
 806         # deferred import because proxy needs
 807         # our class definitions to define proxies
 808         import nepi.util.proxy as proxy
 809
 810         if deployment_config is None:
 811             # need to create one
 812             deployment_config = proxy.AccessConfiguration()
 813
 814             for (name, value) in data.get_attribute_data(guid):
 815                 if value is not None and deployment_config.has_attribute(name):
 816                     # if any deployment config attribute has a netref, we can't
 817                     # create this controller yet
 818                     if isinstance(value, basestring) and ATTRIBUTE_PATTERN_BASE.search(value):
 819                         # remember to re-issue this one
 820                         self._netreffed_testbeds.add(guid)
 821                         return
 822
 823                     # copy deployment config attribute
 824                     deployment_config.set_attribute_value(name, value)
 825
 826             # commit config
 827             self._deployment_config[guid] = deployment_config
 828
 829         if deployment_config is not None:
 830             # force recovery mode
 831             deployment_config.set_attribute_value("recover",recover)
 832
 833         testbed = proxy.create_testbed_controller(testbed_id,
 834                 testbed_version, deployment_config)
 835         for (name, value) in data.get_attribute_data(guid):
 836             testbed.defer_configure(name, value)
 837         self._testbeds[guid] = testbed
 838         if guid in self._netreffed_testbeds:
 839             self._netreffed_testbeds.remove(guid)
 840
 841     def _program_testbed_controllers(self, element_guids, data):
 842         for guid in element_guids:
 843             (testbed_guid, factory_id) = data.get_box_data(guid)
 844             testbed = self._testbeds.get(testbed_guid)
 845             if testbed:
 846                 testbed.defer_create(guid, factory_id)
 847                 for (name, value) in data.get_attribute_data(guid):
 848                     # Try to resolve create-time netrefs, if possible
 849                     if isinstance(value, basestring) and ATTRIBUTE_PATTERN_BASE.search(value):
 850                         try:
 851                             nuvalue = self.resolve_netref_value(value)
 852                         except:
 853                             # Any trouble means we're not in shape to resolve the netref yet
 854                             nuvalue = None
 855                         if nuvalue is not None:
 856                             # Only if we succeed we remove the netref deferral entry
 857                             value = nuvalue
 858                             data.set_attribute_data(guid, name, value)
 859                             if (testbed_guid, guid) in self._netrefs:
 860                                 self._netrefs[(testbed_guid, guid)].discard(name)
 861                     testbed.defer_create_set(guid, name, value)
 862
 863         for guid in element_guids:
 864             (testbed_guid, factory_id) = data.get_box_data(guid)
 865             testbed = self._testbeds.get(testbed_guid)
 866             if testbed:
 867                 for (connector_type_name, cross_guid, cross_connector_type_name) \
 868                         in data.get_connection_data(guid):
 869                     (testbed_guid, factory_id) = data.get_box_data(guid)
 870                     (cross_testbed_guid, cross_factory_id) = data.get_box_data(
 871                             cross_guid)
 872                     if testbed_guid == cross_testbed_guid:
 873                         testbed.defer_connect(guid, connector_type_name,
 874                                 cross_guid, cross_connector_type_name)
 875                 for trace_id in data.get_trace_data(guid):
 876                     testbed.defer_add_trace(guid, trace_id)
 877                 for (autoconf, address, netprefix, broadcast) in \
 878                         data.get_address_data(guid):
 879                     if address != None:
 880                         testbed.defer_add_address(guid, address, netprefix,
 881                                 broadcast)
 882                 for (destination, netprefix, nexthop) in data.get_route_data(guid):
 883                     testbed.defer_add_route(guid, destination, netprefix, nexthop)
 884
 885     def _program_testbed_cross_connections(self, data):
 886         data_guids = data.guids
 887
 888         for guid in data_guids:
 889             if not data.is_testbed_data(guid):
 890                 (testbed_guid, factory_id) = data.get_box_data(guid)
 891                 testbed = self._testbeds.get(testbed_guid)
 892                 if testbed:
 893                     for (connector_type_name, cross_guid, cross_connector_type_name) \
 894                             in data.get_connection_data(guid):
 895                         (testbed_guid, factory_id) = data.get_box_data(guid)
 896                         (cross_testbed_guid, cross_factory_id) = data.get_box_data(
 897                                 cross_guid)
 898                         if testbed_guid != cross_testbed_guid:
 899                             cross_testbed = self._testbeds[cross_testbed_guid]
 900                             cross_testbed_id = cross_testbed.testbed_id
 901                             testbed.defer_cross_connect(guid, connector_type_name, cross_guid,
 902                                     cross_testbed_guid, cross_testbed_id, cross_factory_id,
 903                                     cross_connector_type_name)
 904                             # save cross data for later
 905                             self._add_crossdata(testbed_guid, guid, cross_testbed_guid,
 906                                     cross_guid)
 907
 908     def _add_crossdata(self, testbed_guid, guid, cross_testbed_guid, cross_guid):
 909         if testbed_guid not in self._cross_data:
 910             self._cross_data[testbed_guid] = dict()
 911         if cross_testbed_guid not in self._cross_data[testbed_guid]:
 912             self._cross_data[testbed_guid][cross_testbed_guid] = set()
 913         self._cross_data[testbed_guid][cross_testbed_guid].add(cross_guid)
 914
 915     def _get_cross_data(self, testbed_guid):
 916         cross_data = dict()
 917         if not testbed_guid in self._cross_data:
 918             return cross_data
 919         for cross_testbed_guid, guid_list in \
 920                 self._cross_data[testbed_guid].iteritems():
 921             cross_data[cross_testbed_guid] = dict()
 922             cross_testbed = self._testbeds[cross_testbed_guid]
 923             for cross_guid in guid_list:
 924                 elem_cross_data = dict(
 925                     _guid = cross_guid,
 926                     _testbed_guid = cross_testbed_guid,
 927                     _testbed_id = cross_testbed.testbed_id,
 928                     _testbed_version = cross_testbed.testbed_version)
 929                 cross_data[cross_testbed_guid][cross_guid] = elem_cross_data
 930                 attributes_list = cross_testbed.get_attribute_list(cross_guid)
 931                 for attr_name in attributes_list:
 932                     attr_value = cross_testbed.get(cross_guid, attr_name)
 933                     elem_cross_data[attr_name] = attr_value
 934         return cross_data
 935