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) or \
48 factory.box_attributes.is_attribute_invisible(name):
50 element = self._elements[guid]
51 ns3_value = self._to_ns3_value(guid, name, value)
52 element.SetAttribute(name, ns3_value)
54 def get(self, guid, name, time = TIME_NOW):
55 value = super(TestbedController, self).get(guid, name, time)
56 # TODO: take on account schedule time for the task
57 factory_id = self._create[guid]
58 factory = self._factories[factory_id]
59 if factory.box_attributes.is_attribute_design_only(name) or \
60 factory.box_attributes.is_attribute_invisible(name):
62 TypeId = self.ns3.TypeId()
63 typeid = TypeId.LookupByName(factory_id)
64 info = TypeId.AttributeInfo()
65 if not typeid or not typeid.LookupAttributeByName(name, info):
66 raise AttributeError("Invalid attribute %s for element type %d" % \
68 checker = info.checker
69 ns3_value = checker.Create()
70 element = self._elements[guid]
71 element.GetAttribute(name, ns3_value)
72 value = ns3_value.SerializeToString(checker)
73 attr_type = factory.box_attributes.get_attribute_type(name)
74 if attr_type == Attribute.INTEGER:
76 if attr_type == Attribute.DOUBLE:
78 if attr_type == Attribute.BOOL:
79 return value == "true"
82 def action(self, time, guid, action):
83 raise NotImplementedError
85 def trace_filename(self, guid, trace_id):
86 # TODO: Need to be defined inside a home!!!! with and experiment id_code
87 filename = self._traces[guid][trace_id]
88 return os.path.join(self.home_directory, filename)
90 def follow_trace(self, guid, trace_id, filename):
91 if guid not in self._traces:
92 self._traces[guid] = dict()
93 self._traces[guid][trace_id] = filename
96 for element in self._elements.values():
99 def _simulator_run(self, condition):
101 self.ns3.Simulator.Run()
102 # Signal condition on simulation end to notify waiting threads
104 condition.notifyAll()
107 def _schedule_event(self, condition, func, *args):
108 """Schedules event on running experiment"""
109 def execute_event(condition, has_event_occurred, func, *args):
113 has_event_occurred[0] = True
114 # notify condition indicating attribute was set
116 condition.notifyAll()
119 # contextId is defined as general context
120 contextId = long(0xffffffff)
121 # delay 0 means that the event is expected to execute inmediately
122 delay = self.ns3.Seconds(0)
123 # flag to indicate that the event occured
124 # because bool is an inmutable object in python, in order to create a
125 # bool flag, a list is used as wrapper
126 has_event_occurred = [False]
128 if not self.ns3.Simulator.IsFinished():
129 self.ns3.Simulator.ScheduleWithContext(contextId, delay, execute_event,
130 condition, has_event_occurred, func, *args)
131 while not has_event_occurred[0] and not self.ns3.Simulator.IsFinished():
134 if not has_event_occurred[0]:
135 raise RuntimeError('Event could not be scheduled : %s %s ' \
136 % (repr(func), repr(args)))
138 def _to_ns3_value(self, guid, name, value):
139 factory_id = self._create[guid]
140 TypeId = self.ns3.TypeId()
141 typeid = TypeId.LookupByName(factory_id)
142 info = TypeId.AttributeInfo()
143 if not typeid.LookupAttributeByName(name, info):
144 raise RuntimeError("Attribute %s doesn't belong to element %s" \
145 % (name, factory_id))
146 str_value = str(value)
147 if isinstance(value, bool):
148 str_value = str_value.lower()
149 checker = info.checker
150 ns3_value = checker.Create()
151 ns3_value.DeserializeFromString(str_value, checker)
154 def _load_ns3_module(self):
158 simu_impl_type = self._attributes.get_attribute_value(
159 "SimulatorImplementationType")
160 checksum = self._attributes.get_attribute_value("ChecksumEnabled")
162 bindings = os.environ["NEPI_NS3BINDINGS"] \
163 if "NEPI_NS3BINDINGS" in os.environ else None
164 libfile = os.environ["NEPI_NS3LIBRARY"] \
165 if "NEPI_NS3LIBRARY" in os.environ else None
168 ctypes.CDLL(libfile, ctypes.RTLD_GLOBAL)
170 path = [ os.path.dirname(__file__) ] + sys.path
172 path = [ bindings ] + path
174 module = imp.find_module ('ns3', path)
175 mod = imp.load_module ('ns3', *module)
178 value = mod.StringValue(simu_impl_type)
179 mod.GlobalValue.Bind ("SimulatorImplementationType", value)
181 value = mod.BooleanValue(checksum)
182 mod.GlobalValue.Bind ("ChecksumEnabled", value)
185 def _get_construct_parameters(self, guid):
186 params = self._get_parameters(guid)
187 construct_params = dict()
188 factory_id = self._create[guid]
189 TypeId = self.ns3.TypeId()
190 typeid = TypeId.LookupByName(factory_id)
191 for name, value in params.iteritems():
192 info = self.ns3.TypeId.AttributeInfo()
193 found = typeid.LookupAttributeByName(name, info)
195 (info.flags & TypeId.ATTR_CONSTRUCT == TypeId.ATTR_CONSTRUCT):
196 construct_params[name] = value
197 return construct_params