2 # -*- coding: utf-8 -*-
4 from nepi.core.attributes import Attribute, AttributesMap
5 from nepi.core.connector import ConnectorTypeBase
6 from nepi.util import proxy, validation
7 from nepi.util.constants import STATUS_FINISHED, TIME_NOW
8 from nepi.util.parser._xml import XmlExperimentParser
15 ATTRIBUTE_PATTERN_BASE = re.compile(r"\{#\[(?P<label>[-a-zA-Z0-9._]*)\](?P<expr>(?P<component>\.addr\[[0-9]+\]|\.route\[[0-9]+\]|\.trace\[[0-9]+\]|).\[(?P<attribute>[-a-zA-Z0-9._]*)\])#}")
16 ATTRIBUTE_PATTERN_GUID_SUB = r"{#[%(guid)s]%(expr)s#}"
17 COMPONENT_PATTERN = re.compile(r"(?P<kind>[a-z]*)\[(?P<index>.*)\]")
19 class ConnectorType(ConnectorTypeBase):
20 def __init__(self, testbed_id, factory_id, name, max = -1, min = 0):
21 super(ConnectorType, self).__init__(testbed_id, factory_id, name, max, min)
22 # from_connections -- connections where the other connector is the "From"
23 # to_connections -- connections where the other connector is the "To"
24 # keys in the dictionary correspond to the
25 # connector_type_id for possible connections. The value is a tuple:
26 # (can_cross, connect)
27 # can_cross: indicates if the connection is allowed accros different
29 # code: is the connection function to be invoked when the elements
31 self._from_connections = dict()
32 self._to_connections = dict()
34 def add_from_connection(self, testbed_id, factory_id, name, can_cross,
35 init_code, compl_code):
36 type_id = self.make_connector_type_id(testbed_id, factory_id, name)
37 self._from_connections[type_id] = (can_cross, init_code, compl_code)
39 def add_to_connection(self, testbed_id, factory_id, name, can_cross,
40 init_code, compl_code):
41 type_id = self.make_connector_type_id(testbed_id, factory_id, name)
42 self._to_connections[type_id] = (can_cross, init_code, compl_code)
44 def can_connect(self, testbed_id, factory_id, name, count,
46 connector_type_id = self.make_connector_type_id(testbed_id, factory_id, name)
47 for lookup_type_id in self._type_resolution_order(connector_type_id):
48 if lookup_type_id in self._from_connections:
49 (can_cross, init_code, compl_code) = self._from_connections[lookup_type_id]
50 elif lookup_type_id in self._to_connections:
51 (can_cross, init_code, compl_code) = self._to_connections[lookup_type_id]
55 return not must_cross or can_cross
59 def _connect_to_code(self, testbed_id, factory_id, name):
60 connector_type_id = self.make_connector_type_id(testbed_id, factory_id, name)
61 for lookup_type_id in self._type_resolution_order(connector_type_id):
62 if lookup_type_id in self._to_connections:
63 (can_cross, init_code, compl_code) = self._to_connections[lookup_type_id]
64 return (init_code, compl_code)
68 def connect_to_init_code(self, testbed_id, factory_id, name):
69 return self._connect_to_code(testbed_id, factory_id, name)[0]
71 def connect_to_compl_code(self, testbed_id, factory_id, name):
72 return self._connect_to_code(testbed_id, factory_id, name)[1]
74 class Factory(AttributesMap):
75 def __init__(self, factory_id, create_function, start_function,
76 stop_function, status_function,
77 configure_function, preconfigure_function,
78 allow_addresses = False, has_addresses = False,
79 allow_routes = False, has_routes = False):
80 super(Factory, self).__init__()
81 self._factory_id = factory_id
82 self._allow_addresses = bool(allow_addresses)
83 self._allow_routes = bool(allow_routes)
84 self._has_addresses = bool(has_addresses) or self._allow_addresses
85 self._has_routes = bool(has_routes) or self._allow_routes
86 self._create_function = create_function
87 self._start_function = start_function
88 self._stop_function = stop_function
89 self._status_function = status_function
90 self._configure_function = configure_function
91 self._preconfigure_function = preconfigure_function
92 self._connector_types = dict()
94 self._box_attributes = AttributesMap()
98 return self._factory_id
101 def allow_addresses(self):
102 return self._allow_addresses
105 def allow_routes(self):
106 return self._allow_routes
109 def has_addresses(self):
110 return self._has_addresses
113 def has_routes(self):
114 return self._has_routes
117 def box_attributes(self):
118 return self._box_attributes
121 def create_function(self):
122 return self._create_function
125 def start_function(self):
126 return self._start_function
129 def stop_function(self):
130 return self._stop_function
133 def status_function(self):
134 return self._status_function
137 def configure_function(self):
138 return self._configure_function
141 def preconfigure_function(self):
142 return self._preconfigure_function
148 def connector_type(self, name):
149 return self._connector_types[name]
151 def add_connector_type(self, connector_type):
152 self._connector_types[connector_type.name] = connector_type
154 def add_trace(self, trace_id):
155 self._traces.append(trace_id)
157 def add_box_attribute(self, name, help, type, value = None, range = None,
158 allowed = None, flags = Attribute.NoFlags, validation_function = None):
159 self._box_attributes.add_attribute(name, help, type, value, range,
160 allowed, flags, validation_function)
162 class TestbedController(object):
163 def __init__(self, testbed_id, testbed_version):
164 self._testbed_id = testbed_id
165 self._testbed_version = testbed_version
168 def testbed_id(self):
169 return self._testbed_id
172 def testbed_version(self):
173 return self._testbed_version
177 raise NotImplementedError
179 def defer_configure(self, name, value):
180 """Instructs setting a configuartion attribute for the testbed instance"""
181 raise NotImplementedError
183 def defer_create(self, guid, factory_id):
184 """Instructs creation of element """
185 raise NotImplementedError
187 def defer_create_set(self, guid, name, value):
188 """Instructs setting an initial attribute on an element"""
189 raise NotImplementedError
191 def defer_factory_set(self, guid, name, value):
192 """Instructs setting an attribute on a factory"""
193 raise NotImplementedError
195 def defer_connect(self, guid1, connector_type_name1, guid2,
196 connector_type_name2):
197 """Instructs creation of a connection between the given connectors"""
198 raise NotImplementedError
200 def defer_cross_connect(self, guid, connector_type_name, cross_guid,
201 cross_testbed_id, cross_factory_id, cross_connector_type_name):
203 Instructs creation of a connection between the given connectors
204 of different testbed instances
206 raise NotImplementedError
208 def defer_add_trace(self, guid, trace_id):
209 """Instructs the addition of a trace"""
210 raise NotImplementedError
212 def defer_add_address(self, guid, address, netprefix, broadcast):
213 """Instructs the addition of an address"""
214 raise NotImplementedError
216 def defer_add_route(self, guid, destination, netprefix, nexthop):
217 """Instructs the addition of a route"""
218 raise NotImplementedError
221 """After do_setup the testbed initial configuration is done"""
222 raise NotImplementedError
226 After do_create all instructed elements are created and
229 raise NotImplementedError
231 def do_connect_init(self):
233 After do_connect_init all internal connections between testbed elements
236 raise NotImplementedError
238 def do_connect_compl(self):
240 After do_connect all internal connections between testbed elements
243 raise NotImplementedError
245 def do_configure(self):
246 """After do_configure elements are configured"""
247 raise NotImplementedError
249 def do_cross_connect_init(self, cross_data):
251 After do_cross_connect_init initiation of all external connections
252 between different testbed elements is performed
254 raise NotImplementedError
256 def do_cross_connect_compl(self, cross_data):
258 After do_cross_connect_compl completion of all external connections
259 between different testbed elements is performed
261 raise NotImplementedError
264 raise NotImplementedError
267 raise NotImplementedError
269 def set(self, guid, name, value, time = TIME_NOW):
270 raise NotImplementedError
272 def get(self, guid, name, time = TIME_NOW):
273 raise NotImplementedError
275 def get_route(self, guid, index, attribute):
279 guid: guid of box to query
280 index: number of routing entry to fetch
281 attribute: one of Destination, NextHop, NetPrefix
283 raise NotImplementedError
285 def get_address(self, guid, index, attribute='Address'):
289 guid: guid of box to query
290 index: number of inteface to select
291 attribute: one of Address, NetPrefix, Broadcast
293 raise NotImplementedError
295 def get_attribute_list(self, guid):
296 raise NotImplementedError
298 def action(self, time, guid, action):
299 raise NotImplementedError
301 def status(self, guid):
302 raise NotImplementedError
304 def trace(self, guid, trace_id, attribute='value'):
305 raise NotImplementedError
308 raise NotImplementedError
310 class ExperimentController(object):
311 def __init__(self, experiment_xml, root_dir):
312 self._experiment_xml = experiment_xml
313 self._testbeds = dict()
314 self._access_config = dict()
315 self._netrefs = dict()
316 self._cross_data = dict()
317 self._root_dir = root_dir
319 self.persist_experiment_xml()
322 def experiment_xml(self):
323 return self._experiment_xml
325 def persist_experiment_xml(self):
326 xml_path = os.path.join(self._root_dir, "experiment.xml")
327 f = open(xml_path, "w")
328 f.write(self._experiment_xml)
331 def set_access_configuration(self, testbed_guid, access_config):
332 self._access_config[testbed_guid] = access_config
334 def trace(self, testbed_guid, guid, trace_id, attribute='value'):
335 return self._testbeds[testbed_guid].trace(guid, trace_id, attribute)
338 def _parallel(callables):
339 threads = [ threading.Thread(target=callable) for callable in callables ]
340 for thread in threads:
342 for thread in threads:
346 self._init_testbed_controllers()
348 # persist testbed connection data, for potential recovery
349 self._persist_testbed_proxies()
351 # perform setup in parallel for all test beds,
352 # wait for all threads to finish
353 self._parallel([testbed.do_setup
354 for testbed in self._testbeds.itervalues()])
356 # perform create-connect in parallel, wait
357 # (internal connections only)
358 self._parallel([testbed.do_create
359 for testbed in self._testbeds.itervalues()])
361 self._parallel([testbed.do_connect_init
362 for testbed in self._testbeds.itervalues()])
364 self._parallel([testbed.do_connect_compl
365 for testbed in self._testbeds.itervalues()])
367 self._parallel([testbed.do_preconfigure
368 for testbed in self._testbeds.itervalues()])
371 self.do_netrefs(fail_if_undefined=True)
373 # perform do_configure in parallel for al testbeds
374 # (it's internal configuration for each)
375 self._parallel([testbed.do_configure
376 for testbed in self._testbeds.itervalues()])
378 # cross-connect (cannot be done in parallel)
379 for guid, testbed in self._testbeds.iteritems():
380 cross_data = self._get_cross_data(guid)
381 testbed.do_cross_connect_init(cross_data)
382 for guid, testbed in self._testbeds.iteritems():
383 cross_data = self._get_cross_data(guid)
384 testbed.do_cross_connect_compl(cross_data)
386 # start experiment (parallel start on all testbeds)
387 self._parallel([testbed.start
388 for testbed in self._testbeds.itervalues()])
390 def _persist_testbed_proxies(self):
391 TRANSIENT = ('Recover',)
393 # persist access configuration for all testbeds, so that
394 # recovery mode can reconnect to them if it becomes necessary
395 conf = ConfigParser.RawConfigParser()
396 for testbed_guid, testbed_config in self._access_config.iteritems():
397 testbed_guid = str(testbed_guid)
398 conf.add_section(testbed_guid)
399 for attr in testbed_config.attributes_list:
400 if attr not in TRANSIENT:
401 conf.set(testbed_guid, attr,
402 testbed_config.get_attribute_value(attr))
404 f = open(os.path.join(self._root_dir, 'access_config.ini'), 'w')
408 def _load_testbed_proxies(self):
413 BOOLEAN : 'getboolean',
416 conf = ConfigParser.RawConfigParser()
417 conf.read(os.path.join(self._root_dir, 'access_config.ini'))
418 for testbed_guid in conf.sections():
419 testbed_config = proxy.AccessConfiguration()
420 for attr in conf.options(testbed_guid):
421 testbed_config.set_attribute_value(attr,
422 conf.get(testbed_guid, attr) )
424 testbed_guid = str(testbed_guid)
425 conf.add_section(testbed_guid)
426 for attr in testbed_config.attributes_list:
427 if attr not in TRANSIENT:
428 getter = getattr(conf, TYPEMAP.get(
429 testbed_config.get_attribute_type(attr),
431 testbed_config.set_attribute_value(
432 testbed_guid, attr, getter(attr))
434 def _unpersist_testbed_proxies(self):
436 os.remove(os.path.join(self._root_dir, 'access_config.ini'))
438 # Just print exceptions, this is just cleanup
440 traceback.print_exc(file=sys.stderr)
443 for testbed in self._testbeds.values():
445 self._unpersist_testbed_proxies()
448 # reload perviously persisted testbed access configurations
449 self._load_testbed_proxies()
451 # recreate testbed proxies by reconnecting only
452 self._init_testbed_controllers(recover = True)
454 def is_finished(self, guid):
455 for testbed in self._testbeds.values():
456 for guid_ in testbed.guids:
458 return testbed.status(guid) == STATUS_FINISHED
459 raise RuntimeError("No element exists with guid %d" % guid)
461 def set(self, testbed_guid, guid, name, value, time = TIME_NOW):
462 testbed = self._testbeds[testbed_guid]
463 testbed.set(guid, name, value, time)
465 def get(self, testbed_guid, guid, name, time = TIME_NOW):
466 testbed = self._testbeds[testbed_guid]
467 return testbed.get(guid, name, time)
470 for testbed in self._testbeds.values():
474 def _netref_component_split(component):
475 match = COMPONENT_PATTERN.match(component)
477 return match.group("kind"), match.group("index")
479 return component, None
481 def do_netrefs(self, fail_if_undefined = False):
482 COMPONENT_GETTERS = {
484 lambda testbed, guid, index, name:
485 testbed.get_address(guid, index, name),
487 lambda testbed, guid, index, name:
488 testbed.get_route(guid, index, name),
490 lambda testbed, guid, index, name:
491 testbed.trace(guid, index, name),
493 lambda testbed, guid, index, name:
494 testbed.get(guid, name),
497 for (testbed_guid, guid), attrs in self._netrefs.iteritems():
498 testbed = self._testbeds[testbed_guid]
500 value = testbed.get(guid, name)
501 if isinstance(value, basestring):
502 match = ATTRIBUTE_PATTERN_BASE.search(value)
504 label = match.group("label")
505 if label.startswith('GUID-'):
506 ref_guid = int(label[5:])
508 expr = match.group("expr")
509 component = match.group("component")[1:] # skip the dot
510 attribute = match.group("attribute")
512 # split compound components into component kind and index
513 # eg: 'addr[0]' -> ('addr', '0')
514 component, component_index = self._netref_component_split(component)
516 # find object and resolve expression
517 for ref_testbed in self._testbeds.itervalues():
518 if component not in COMPONENT_GETTERS:
519 raise ValueError, "Malformed netref: %r - unknown component" % (expr,)
521 ref_value = COMPONENT_GETTERS[component](
522 ref_testbed, ref_guid, component_index, attribute)
524 testbed.set(guid, name,
525 value.replace(match.group(), ref_value))
528 # couldn't find value
529 if fail_if_undefined:
530 raise ValueError, "Unresolvable GUID: %r, in netref: %r" % (ref_guid, expr)
532 def _init_testbed_controllers(self, recover = False):
533 parser = XmlExperimentParser()
534 data = parser.from_xml_to_data(self._experiment_xml)
535 element_guids = list()
537 data_guids = data.guids
539 # create testbed controllers
540 for guid in data_guids:
541 if data.is_testbed_data(guid):
542 self._create_testbed_controller(guid, data, element_guids,
545 element_guids.append(guid)
546 label = data.get_attribute_data(guid, "label")
547 if label is not None:
548 if label in label_guids:
549 raise RuntimeError, "Label %r is not unique" % (label,)
550 label_guids[label] = guid
552 # replace references to elements labels for its guid
553 self._resolve_labels(data, data_guids, label_guids)
555 # program testbed controllers
557 self._program_testbed_controllers(element_guids, data)
559 def _resolve_labels(self, data, data_guids, label_guids):
560 netrefs = self._netrefs
561 for guid in data_guids:
562 if not data.is_testbed_data(guid):
563 for name, value in data.get_attribute_data(guid):
564 if isinstance(value, basestring):
565 match = ATTRIBUTE_PATTERN_BASE.search(value)
567 label = match.group("label")
568 if not label.startswith('GUID-'):
569 ref_guid = label_guids.get(label)
570 if ref_guid is not None:
571 value = ATTRIBUTE_PATTERN_BASE.sub(
572 ATTRIBUTE_PATTERN_GUID_SUB % dict(
573 guid = 'GUID-%d' % (ref_guid,),
574 expr = match.group("expr"),
577 data.set_attribute_data(guid, name, value)
579 # memorize which guid-attribute pairs require
580 # postprocessing, to avoid excessive controller-testbed
581 # communication at configuration time
582 # (which could require high-latency network I/O)
583 (testbed_guid, factory_id) = data.get_box_data(guid)
584 netrefs.setdefault((testbed_guid, guid), set()).add(name)
586 def _create_testbed_controller(self, guid, data, element_guids, recover):
587 (testbed_id, testbed_version) = data.get_testbed_data(guid)
588 access_config = None if guid not in self._access_config else\
589 self._access_config[guid]
591 if recover and access_config is None:
593 access_config = self._access_config[guid] = proxy.AccessConfiguration()
594 if access_config is not None:
595 # force recovery mode
596 access_config.set_attribute_value("recover",recover)
598 testbed = proxy.create_testbed_controller(testbed_id,
599 testbed_version, access_config)
600 for (name, value) in data.get_attribute_data(guid):
601 testbed.defer_configure(name, value)
602 self._testbeds[guid] = testbed
604 def _program_testbed_controllers(self, element_guids, data):
605 for guid in element_guids:
606 (testbed_guid, factory_id) = data.get_box_data(guid)
607 testbed = self._testbeds[testbed_guid]
608 testbed.defer_create(guid, factory_id)
609 for (name, value) in data.get_attribute_data(guid):
610 testbed.defer_create_set(guid, name, value)
612 for guid in element_guids:
613 (testbed_guid, factory_id) = data.get_box_data(guid)
614 testbed = self._testbeds[testbed_guid]
615 for (connector_type_name, cross_guid, cross_connector_type_name) \
616 in data.get_connection_data(guid):
617 (testbed_guid, factory_id) = data.get_box_data(guid)
618 (cross_testbed_guid, cross_factory_id) = data.get_box_data(
620 if testbed_guid == cross_testbed_guid:
621 testbed.defer_connect(guid, connector_type_name,
622 cross_guid, cross_connector_type_name)
624 cross_testbed = self._testbeds[cross_testbed_guid]
625 cross_testbed_id = cross_testbed.testbed_id
626 testbed.defer_cross_connect(guid, connector_type_name, cross_guid,
627 cross_testbed_guid, cross_testbed_id, cross_factory_id,
628 cross_connector_type_name)
629 # save cross data for later
630 self._add_crossdata(testbed_guid, guid, cross_testbed_guid,
632 for trace_id in data.get_trace_data(guid):
633 testbed.defer_add_trace(guid, trace_id)
634 for (autoconf, address, netprefix, broadcast) in \
635 data.get_address_data(guid):
637 testbed.defer_add_address(guid, address, netprefix,
639 for (destination, netprefix, nexthop) in data.get_route_data(guid):
640 testbed.defer_add_route(guid, destination, netprefix, nexthop)
642 def _add_crossdata(self, testbed_guid, guid, cross_testbed_guid, cross_guid):
643 if testbed_guid not in self._cross_data:
644 self._cross_data[testbed_guid] = dict()
645 if cross_testbed_guid not in self._cross_data[testbed_guid]:
646 self._cross_data[testbed_guid][cross_testbed_guid] = set()
647 self._cross_data[testbed_guid][cross_testbed_guid].add(cross_guid)
649 def _get_cross_data(self, testbed_guid):
651 if not testbed_guid in self._cross_data:
653 for cross_testbed_guid, guid_list in \
654 self._cross_data[testbed_guid].iteritems():
655 cross_data[cross_testbed_guid] = dict()
656 cross_testbed = self._testbeds[cross_testbed_guid]
657 for cross_guid in guid_list:
658 elem_cross_data = dict()
659 cross_data[cross_testbed_guid][cross_guid] = elem_cross_data
660 attributes_list = cross_testbed.get_attribute_list(cross_guid)
661 for attr_name in attributes_list:
662 attr_value = cross_testbed.get(cross_guid, attr_name)
663 elem_cross_data[attr_name] = attr_value