src/nepi/testbeds/netns/execute.py

   1 #!/usr/bin/env python
   2 # -*- coding: utf-8 -*-
   3
   4 from constants import TESTBED_ID
   5 from nepi.core import testbed_impl
   6 import os
   7
   8 class TestbedInstance(testbed_impl.TestbedInstance):
   9     def __init__(self, testbed_version):
  10         super(TestbedInstance, self).__init__(TESTBED_ID, testbed_version)
  11         self._netns = None
  12         self._home_directory = None
  13         self._traces = dict()
  14
  15     @property
  16     def home_directory(self):
  17         return self._home_directory
  18
  19     @property
  20     def netns(self):
  21         return self._netns
  22
  23     def do_setup(self):
  24         self._home_directory = self._attributes.\
  25             get_attribute_value("homeDirectory")
  26         self._netns = self._load_netns_module()
  27
  28     def set(self, time, guid, name, value):
  29         super(TestbedInstance, self).set(time, guid, name, value)
  30
  31         # TODO: take on account schedule time for the task
  32         element = self._elements.get(guid)
  33         if element:
  34             setattr(element, name, value)
  35
  36     def get(self, time, guid, name):
  37         # TODO: take on account schedule time for the task
  38         element = self._elements.get(guid)
  39         if element:
  40             try:
  41                 if hasattr(element, name):
  42                     # Runtime attribute
  43                     return getattr(element, name)
  44                 else:
  45                     # Try design-time attributes
  46                     return self.box_get(time, guid, name)
  47             except KeyError, AttributeError:
  48                 return None
  49
  50     def get_route(self, guid, index, attribute):
  51         # TODO: fetch real data from netns
  52         try:
  53             return self.box_get_route(guid, int(index), attribute)
  54         except KeyError, AttributeError:
  55             return None
  56
  57     def get_address(self, guid, index, attribute='Address'):
  58         # TODO: fetch real data from netns
  59         try:
  60             return self.box_get_address(guid, int(index), attribute)
  61         except KeyError, AttributeError:
  62             return None
  63
  64
  65     def action(self, time, guid, action):
  66         raise NotImplementedError
  67
  68     def shutdown(self):
  69         for trace in self._traces.values():
  70             trace.close()
  71         for element in self._elements.values():
  72             element.destroy()
  73
  74     def trace_filename(self, guid, trace_id):
  75         # TODO: Need to be defined inside a home!!!! with and experiment id_code
  76         return os.path.join(self.home_directory, "%d_%s" % (guid, trace_id))
  77
  78     def follow_trace(self, trace_id, trace):
  79         self._traces[trace_id] = trace
  80
  81     def _load_netns_module(self):
  82         # TODO: Do something with the configuration!!!
  83         import sys
  84         __import__("netns")
  85         netns_mod = sys.modules["netns"]
  86         # enable debug
  87         enable_debug = self._attributes.get_attribute_value("enableDebug")
  88         if enable_debug:
  89             netns_mod.environ.set_log_level(netns_mod.environ.LOG_DEBUG)
  90         return netns_mod
  91