2 # -*- coding: utf-8 -*-
4 from constants import TESTBED_ID
5 from nepi.core import testbed_impl
6 from nepi.core.attributes import Attribute
7 from nepi.util.constants import TIME_NOW
12 class TestbedController(testbed_impl.TestbedController):
13 def __init__(self, testbed_version):
14 super(TestbedController, self).__init__(TESTBED_ID, testbed_version)
16 self._home_directory = None
18 self._simulator_thread = None
19 self._condition = None
22 def home_directory(self):
23 return self._home_directory
30 self._home_directory = self._attributes.\
31 get_attribute_value("homeDirectory")
32 self._ns3 = self._load_ns3_module()
33 super(TestbedController, self).do_setup()
36 super(TestbedController, self).start()
37 self._condition = threading.Condition()
38 self._simulator_thread = threading.Thread(target = self._simulator_run,
39 args = [self._condition])
40 self._simulator_thread.start()
42 def set(self, guid, name, value, time = TIME_NOW):
43 super(TestbedController, self).set(guid, name, value, time)
44 # TODO: take on account schedule time for the task
45 factory_id = self._create[guid]
46 factory = self._factories[factory_id]
47 if factory.box_attributes.is_attribute_design_only(name):
49 element = self._elements[guid]
50 ns3_value = self._to_ns3_value(guid, name, value)
51 element.SetAttribute(name, ns3_value)
53 def get(self, guid, name, time = TIME_NOW):
54 value = super(TestbedController, self).get(guid, name, time)
55 # TODO: take on account schedule time for the task
56 factory_id = self._create[guid]
57 factory = self._factories[factory_id]
58 if factory.box_attributes.is_attribute_design_only(name):
60 TypeId = self.ns3.TypeId()
61 typeid = TypeId.LookupByName(factory_id)
62 info = TypeId.AttributeInfo()
63 if not typeid or not typeid.LookupAttributeByName(name, info):
64 raise AttributeError("Invalid attribute %s for element type %d" % \
66 checker = info.checker
67 ns3_value = checker.Create()
68 element = self._elements[guid]
69 element.GetAttribute(name, ns3_value)
70 value = ns3_value.SerializeToString(checker)
71 attr_type = factory.box_attributes.get_attribute_type(name)
72 if attr_type == Attribute.INTEGER:
74 if attr_type == Attribute.DOUBLE:
76 if attr_type == Attribute.BOOL:
77 return value == "true"
80 def action(self, time, guid, action):
81 raise NotImplementedError
83 def trace_filename(self, guid, trace_id):
84 # TODO: Need to be defined inside a home!!!! with and experiment id_code
85 filename = self._traces[guid][trace_id]
86 return os.path.join(self.home_directory, filename)
88 def follow_trace(self, guid, trace_id, filename):
89 if guid not in self._traces:
90 self._traces[guid] = dict()
91 self._traces[guid][trace_id] = filename
94 for element in self._elements.values():
97 def _simulator_run(self, condition):
99 self.ns3.Simulator.Run()
100 # Signal condition on simulation end to notify waiting threads
102 condition.notifyAll()
105 def _schedule_event(self, condition, func, *args):
106 """Schedules event on running experiment"""
107 def execute_event(condition, has_event_occurred, func, *args):
111 has_event_occurred[0] = True
112 # notify condition indicating attribute was set
114 condition.notifyAll()
117 # contextId is defined as general context
118 contextId = long(0xffffffff)
119 # delay 0 means that the event is expected to execute inmediately
120 delay = self.ns3.Seconds(0)
121 # flag to indicate that the event occured
122 # because bool is an inmutable object in python, in order to create a
123 # bool flag, a list is used as wrapper
124 has_event_occurred = [False]
126 if not self.ns3.Simulator.IsFinished():
127 self.ns3.Simulator.ScheduleWithContext(contextId, delay, execute_event,
128 condition, has_event_occurred, func, *args)
129 while not has_event_occurred[0] and not self.ns3.Simulator.IsFinished():
132 if not has_event_occurred[0]:
133 raise RuntimeError('Event could not be scheduled : %s %s ' \
134 % (repr(func), repr(args)))
136 def _to_ns3_value(self, guid, name, value):
137 factory_id = self._create[guid]
138 TypeId = self.ns3.TypeId()
139 typeid = TypeId.LookupByName(factory_id)
140 info = TypeId.AttributeInfo()
141 if not typeid.LookupAttributeByName(name, info):
142 raise RuntimeError("Attribute %s doesn't belong to element %s" \
143 % (name, factory_id))
144 str_value = str(value)
145 if isinstance(value, bool):
146 str_value = str_value.lower()
147 checker = info.checker
148 ns3_value = checker.Create()
149 ns3_value.DeserializeFromString(str_value, checker)
152 def _load_ns3_module(self):
156 simu_impl_type = self._attributes.get_attribute_value(
157 "SimulatorImplementationType")
158 checksum = self._attributes.get_attribute_value("ChecksumEnabled")
160 bindings = os.environ["NEPI_NS3BINDINGS"] \
161 if "NEPI_NS3BINDINGS" in os.environ else None
162 libfile = os.environ["NEPI_NS3LIBRARY"] \
163 if "NEPI_NS3LIBRARY" in os.environ else None
166 ctypes.CDLL(libfile, ctypes.RTLD_GLOBAL)
168 path = [ os.path.dirname(__file__) ] + sys.path
170 path = [ bindings ] + path
172 module = imp.find_module ('ns3', path)
173 mod = imp.load_module ('ns3', *module)
176 value = mod.StringValue(simu_impl_type)
177 mod.GlobalValue.Bind ("SimulatorImplementationType", value)
179 value = mod.BooleanValue(checksum)
180 mod.GlobalValue.Bind ("ChecksumEnabled", value)
183 def _get_construct_parameters(self, guid):
184 params = self._get_parameters(guid)
185 construct_params = dict()
186 factory_id = self._create[guid]
187 TypeId = self.ns3.TypeId()
188 typeid = TypeId.LookupByName(factory_id)
189 for name, value in params.iteritems():
190 info = self.ns3.TypeId.AttributeInfo()
191 found = typeid.LookupAttributeByName(name, info)
193 (info.flags & TypeId.ATTR_CONSTRUCT == TypeId.ATTR_CONSTRUCT):
194 construct_params[name] = value
195 return construct_params