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         # TODO: take on account schedule time for the task
  31         element = self._elements[guid]
  32         if element:
  33             setattr(element, name, value)
  34
  35     def get(self, time, guid, name):
  36         # TODO: take on account schedule time for the task
  37         element = self._elements[guid]
  38         return getattr(element, name)
  39
  40     def action(self, time, guid, action):
  41         raise NotImplementedError
  42
  43     def trace(self, guid, trace_id):
  44         fd = open("%s" % self.trace_filename(guid, trace_id), "r")
  45         content = fd.read()
  46         fd.close()
  47         return content
  48
  49     def shutdown(self):
  50         for trace in self._traces.values():
  51             trace.close()
  52         for element in self._elements.values():
  53             element.destroy()
  54
  55     def trace_filename(self, guid, trace_id):
  56         # TODO: Need to be defined inside a home!!!! with and experiment id_code
  57         return os.path.join(self.home_directory, "%d_%s" % (guid, trace_id))
  58
  59     def follow_trace(self, trace_id, trace):
  60         self._traces[trace_id] = trace
  61
  62     def _load_netns_module(self):
  63         # TODO: Do something with the configuration!!!
  64         import sys
  65         __import__("netns")
  66         netns_mod = sys.modules["netns"]
  67         # enable debug
  68         enable_debug = self._attributes.get_attribute_value("enableDebug")
  69         if enable_debug:
  70             netns_mod.environ.set_log_level(netns_mod.environ.LOG_DEBUG)
  71         return netns_mod
  72