#!/usr/bin/env python
# -*- coding: utf-8 -*-
-from constants import TESTBED_ID
from nepi.core import testbed_impl
from nepi.core.attributes import Attribute
-from nepi.util.constants import TIME_NOW
+from constants import TESTBED_ID
+from nepi.util.constants import TIME_NOW, \
+ TESTBED_STATUS_STARTED
import os
import sys
import threading
+import random
+import socket
+import weakref
class TestbedController(testbed_impl.TestbedController):
+ from nepi.util.tunchannel_impl import TunChannel
+
+ LOCAL_FACTORIES = {
+ 'ns3::Nepi::TunChannel' : TunChannel,
+ }
+
+ LOCAL_TYPES = tuple(LOCAL_FACTORIES.values())
+
def __init__(self, testbed_version):
super(TestbedController, self).__init__(TESTBED_ID, testbed_version)
self._ns3 = None
self._home_directory = self._attributes.\
get_attribute_value("homeDirectory")
self._ns3 = self._load_ns3_module()
+
+ # create home...
+ home = os.path.normpath(self.home_directory)
+ if not os.path.exists(home):
+ os.makedirs(home, 0755)
+
super(TestbedController, self).do_setup()
def start(self):
self._condition = threading.Condition()
self._simulator_thread = threading.Thread(target = self._simulator_run,
args = [self._condition])
+ self._simulator_thread.isDaemon()
self._simulator_thread.start()
+ def stop(self, time = TIME_NOW):
+ super(TestbedController, self).stop(time)
+ # BUG!!!!
+ # TODO!! This is not working!!!
+ self.ns3.Simulator.Stop()
+ #self._stop_simulation(time)
+
def set(self, guid, name, value, time = TIME_NOW):
super(TestbedController, self).set(guid, name, value, time)
# TODO: take on account schedule time for the task
factory_id = self._create[guid]
factory = self._factories[factory_id]
- if factory.box_attributes.is_attribute_design_only(name) or \
- factory.box_attributes.is_attribute_invisible(name):
+ if factory.box_attributes.is_attribute_design_only(name):
return
element = self._elements[guid]
- ns3_value = self._to_ns3_value(guid, name, value)
- element.SetAttribute(name, ns3_value)
+ if factory_id in self.LOCAL_FACTORIES:
+ setattr(element, name, value)
+ elif factory.box_attributes.is_attribute_invisible(name):
+ return
+ else:
+ ns3_value = self._to_ns3_value(guid, name, value)
+ self._set_attribute(name, ns3_value, element)
def get(self, guid, name, time = TIME_NOW):
value = super(TestbedController, self).get(guid, name, time)
# TODO: take on account schedule time for the task
factory_id = self._create[guid]
factory = self._factories[factory_id]
+ element = self._elements[guid]
+ if factory_id in self.LOCAL_FACTORIES:
+ if hasattr(element, name):
+ return getattr(element, name)
+ else:
+ return value
if factory.box_attributes.is_attribute_design_only(name) or \
factory.box_attributes.is_attribute_invisible(name):
return value
(name, guid))
checker = info.checker
ns3_value = checker.Create()
- element = self._elements[guid]
- element.GetAttribute(name, ns3_value)
+ self._get_attribute(name, ns3_value, element)
value = ns3_value.SerializeToString(checker)
attr_type = factory.box_attributes.get_attribute_type(name)
if attr_type == Attribute.INTEGER:
self._traces[guid][trace_id] = filename
def shutdown(self):
- for element in self._elements.values():
- element = None
+ for element in self._elements.itervalues():
+ if isinstance(element, self.LOCAL_TYPES):
+ # graceful shutdown of locally-implemented objects
+ element.Cleanup()
+ self._elements.clear()
+ if self.ns3:
+ self.ns3.Simulator.Stop()
+ # BUG!!!!
+ # TODO!! This is not working!!! NEVER STOPS THE SIMULATION!!!
+ #self._stop_simulation("0s")
+ #if self._simulator_thread:
+ # print "Joining thread"
+ # self._simulator_thread.join()
+ #print "destroying"
+ self.ns3.Simulator.Destroy()
+ self._ns3 = None
+ sys.stdout.flush()
+ sys.stderr.flush()
def _simulator_run(self, condition):
# Run simulation
"""Schedules event on running experiment"""
def execute_event(condition, has_event_occurred, func, *args):
# exec func
- func(*args)
- # flag event occured
- has_event_occurred[0] = True
- # notify condition indicating attribute was set
- condition.acquire()
- condition.notifyAll()
- condition.release()
+ try:
+ func(*args)
+ finally:
+ # flag event occured
+ has_event_occurred[0] = True
+ # notify condition indicating attribute was set
+ condition.acquire()
+ condition.notifyAll()
+ condition.release()
# contextId is defined as general context
contextId = long(0xffffffff)
while not has_event_occurred[0] and not self.ns3.Simulator.IsFinished():
condition.wait()
condition.release()
- if not has_event_occurred[0]:
- raise RuntimeError('Event could not be scheduled : %s %s ' \
- % (repr(func), repr(args)))
+
+ def _set_attribute(self, name, ns3_value, element):
+ if self.status() == TESTBED_STATUS_STARTED:
+ # schedule the event in the Simulator
+ self._schedule_event(self._condition, self._set_ns3_attribute,
+ name, ns3_value, element)
+ else:
+ self._set_ns3_attribute(name, ns3_value, element)
+
+ def _get_attribute(self, name, ns3_value, element):
+ if self.status() == TESTBED_STATUS_STARTED:
+ # schedule the event in the Simulator
+ self._schedule_event(self._condition, self._get_ns3_attribute,
+ name, ns3_value, element)
+ else:
+ self._get_ns3_attribute(name, ns3_value, element)
+
+ def _set_ns3_attribute(self, name, ns3_value, element):
+ element.SetAttribute(name, ns3_value)
+
+ def _get_ns3_attribute(self, name, ns3_value, element):
+ element.GetAttribute(name, ns3_value)
+
+ def _stop_simulation(self, time):
+ if self.status() == TESTBED_STATUS_STARTED:
+ # schedule the event in the Simulator
+ self._schedule_event(self._condition, self._stop_ns3_simulation,
+ time)
+ else:
+ self._stop_ns3_simulation(time)
+
+ def _stop_simulation(self, time = TIME_NOW):
+ if not self.ns3:
+ return
+ if time == TIME_NOW:
+ self.ns3.Simulator.Stop()
+ else:
+ self.ns3.Simulator.Stop(self.ns3.Time(time))
def _to_ns3_value(self, guid, name, value):
factory_id = self._create[guid]
simu_impl_type = self._attributes.get_attribute_value(
"SimulatorImplementationType")
checksum = self._attributes.get_attribute_value("ChecksumEnabled")
+ stop_time = self._attributes.get_attribute_value("StopTime")
bindings = os.environ["NEPI_NS3BINDINGS"] \
if "NEPI_NS3BINDINGS" in os.environ else None
if bindings:
path = [ bindings ] + path
- module = imp.find_module ('ns3', path)
- mod = imp.load_module ('ns3', *module)
+ try:
+ module = imp.find_module ('ns3', path)
+ mod = imp.load_module ('ns3', *module)
+ except ImportError:
+ # In some environments, ns3 per-se does not exist,
+ # only the low-level _ns3
+ module = imp.find_module ('_ns3', path)
+ mod = imp.load_module ('_ns3', *module)
+ sys.modules["ns3"] = mod # install it as ns3 too
+
+ # When using _ns3, we have to make sure we destroy
+ # the simulator when the process finishes
+ import atexit
+ atexit.register(mod.Simulator.Destroy)
if simu_impl_type:
value = mod.StringValue(simu_impl_type)
if checksum:
value = mod.BooleanValue(checksum)
mod.GlobalValue.Bind ("ChecksumEnabled", value)
+ if stop_time:
+ value = mod.Time(stop_time)
+ mod.Simulator.Stop (value)
return mod
def _get_construct_parameters(self, guid):
construct_params[name] = value
return construct_params
+
+
git://git.onelab.eu / nepi.git / blobdiff