src/collecty/bus.py

   1 #!/usr/bin/python
   2 ###############################################################################
   3 #                                                                             #
   4 # collecty - A system statistics collection daemon for IPFire                 #
   5 # Copyright (C) 2015 IPFire development team                                  #
   6 #                                                                             #
   7 # This program is free software: you can redistribute it and/or modify        #
   8 # it under the terms of the GNU General Public License as published by        #
   9 # the Free Software Foundation, either version 3 of the License, or           #
  10 # (at your option) any later version.                                         #
  11 #                                                                             #
  12 # This program is distributed in the hope that it will be useful,             #
  13 # but WITHOUT ANY WARRANTY; without even the implied warranty of              #
  14 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the               #
  15 # GNU General Public License for more details.                                #
  16 #                                                                             #
  17 # You should have received a copy of the GNU General Public License           #
  18 # along with this program.  If not, see <http://www.gnu.org/licenses/>.       #
  19 #                                                                             #
  20 ###############################################################################
  21
  22 import dbus
  23 import dbus.mainloop.glib
  24 import dbus.service
  25 import gobject
  26 import threading
  27
  28 from constants import *
  29 from i18n import _
  30
  31 import logging
  32 log = logging.getLogger("collecty.bus")
  33 log.propagate = 1
  34
  35 # Initialise the glib main loop
  36 dbus.mainloop.glib.DBusGMainLoop(set_as_default=True)
  37 dbus.mainloop.glib.threads_init()
  38
  39 class Bus(threading.Thread):
  40         def __init__(self, collecty):
  41                 threading.Thread.__init__(self)
  42                 self.daemon = True
  43
  44                 self.collecty = collecty
  45
  46                 # Initialise the main loop
  47                 gobject.threads_init()
  48                 self.loop = gobject.MainLoop()
  49
  50                 # Register the GraphGenerator interface
  51                 self.generator = GraphGenerator(self.collecty)
  52
  53         def run(self):
  54                 log.debug(_("Bus thread has started"))
  55
  56                 # Run the main loop
  57                 self.loop.run()
  58
  59         def shutdown(self):
  60                 log.debug(_("Stopping bus thread"))
  61
  62                 # End the main loop
  63                 self.loop.quit()
  64
  65                 # Return when this thread has finished
  66                 return self.join()
  67
  68
  69 class GraphGenerator(dbus.service.Object):
  70         def __init__(self, collecty):
  71                 bus_name = dbus.service.BusName(BUS_DOMAIN, bus=dbus.SystemBus())
  72                 dbus.service.Object.__init__(self, bus_name, "/%s" % self.__class__.__name__)
  73
  74                 self.collecty = collecty
  75
  76         @dbus.service.method(BUS_DOMAIN, in_signature="sa{sv}", out_signature="ay")
  77         def GenerateGraph(self, template_name, kwargs):
  78                 """
  79                         Returns a graph generated from the given template and object.
  80                 """
  81                 graph = self.collecty.generate_graph(template_name, **kwargs)
  82
  83                 return dbus.ByteArray(graph or [])
  84
  85         @dbus.service.method(BUS_DOMAIN, in_signature="", out_signature="as")
  86         def ListTemplates(self):
  87                 """
  88                         Returns a list of all available templates
  89                 """
  90                 return [t.name for t in self.collecty.templates]