examples/example-signal-emitter.py

   1 #!/usr/bin/env python
   2
   3 usage = """Usage:
   4 python example-signal-emitter.py &
   5 python example-signal-recipient.py
   6 python example-signal-recipient.py --exit-service
   7 """
   8
   9 # Copyright (C) 2004-2006 Red Hat Inc. <http://www.redhat.com/>
  10 # Copyright (C) 2005-2007 Collabora Ltd. <http://www.collabora.co.uk/>
  11 #
  12 # Permission is hereby granted, free of charge, to any person
  13 # obtaining a copy of this software and associated documentation
  14 # files (the "Software"), to deal in the Software without
  15 # restriction, including without limitation the rights to use, copy,
  16 # modify, merge, publish, distribute, sublicense, and/or sell copies
  17 # of the Software, and to permit persons to whom the Software is
  18 # furnished to do so, subject to the following conditions:
  19 #
  20 # The above copyright notice and this permission notice shall be
  21 # included in all copies or substantial portions of the Software.
  22 #
  23 # THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  24 # EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  25 # MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  26 # NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
  27 # HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
  28 # WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  29 # OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
  30 # DEALINGS IN THE SOFTWARE.
  31
  32 import gobject
  33
  34 import dbus
  35 import dbus.service
  36 import dbus.mainloop.glib
  37
  38 class TestObject(dbus.service.Object):
  39     def __init__(self, conn, object_path='/com/example/TestService/object'):
  40         dbus.service.Object.__init__(self, conn, object_path)
  41
  42     @dbus.service.signal('com.example.TestService')
  43     def HelloSignal(self, message):
  44         # The signal is emitted when this method exits
  45         # You can have code here if you wish
  46         pass
  47
  48     @dbus.service.method('com.example.TestService')
  49     def emitHelloSignal(self):
  50         #you emit signals by calling the signal's skeleton method
  51         self.HelloSignal('Hello')
  52         return 'Signal emitted'
  53
  54     @dbus.service.method("com.example.TestService",
  55                          in_signature='', out_signature='')
  56     def Exit(self):
  57         loop.quit()
  58
  59 if __name__ == '__main__':
  60     dbus.mainloop.glib.DBusGMainLoop(set_as_default=True)
  61
  62     session_bus = dbus.SessionBus()
  63     name = dbus.service.BusName('com.example.TestService', session_bus)
  64     object = TestObject(session_bus)
  65
  66     loop = gobject.MainLoop()
  67     print "Running example signal emitter service."
  68     print usage
  69     loop.run()