examples/example-signal-recipient.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 sys
  33 import traceback
  34
  35 import gobject
  36
  37 import dbus
  38 import dbus.mainloop.glib
  39
  40 def handle_reply(msg):
  41     print msg
  42
  43 def handle_error(e):
  44     print str(e)
  45
  46 def emit_signal():
  47    #call the emitHelloSignal method
  48    object.emitHelloSignal(dbus_interface="com.example.TestService")
  49                           #reply_handler = handle_reply, error_handler = handle_error)
  50    # exit after waiting a short time for the signal
  51    gobject.timeout_add(2000, loop.quit)
  52
  53    if sys.argv[1:] == ['--exit-service']:
  54       object.Exit(dbus_interface='com.example.TestService')
  55
  56    return False
  57
  58 def hello_signal_handler(hello_string):
  59     print ("Received signal (by connecting using remote object) and it says: "
  60            + hello_string)
  61
  62 def catchall_signal_handler(*args, **kwargs):
  63     print ("Caught signal (in catchall handler) "
  64            + kwargs['dbus_interface'] + "." + kwargs['member'])
  65     for arg in args:
  66         print "        " + str(arg)
  67
  68 def catchall_hello_signals_handler(hello_string):
  69     print "Received a hello signal and it says " + hello_string
  70
  71 def catchall_testservice_interface_handler(hello_string, dbus_message):
  72     print "com.example.TestService interface says " + hello_string + " when it sent signal " + dbus_message.get_member()
  73
  74
  75 if __name__ == '__main__':
  76     dbus.mainloop.glib.DBusGMainLoop(set_as_default=True)
  77
  78     bus = dbus.SessionBus()
  79     try:
  80         object  = bus.get_object("com.example.TestService","/com/example/TestService/object")
  81
  82         object.connect_to_signal("HelloSignal", hello_signal_handler, dbus_interface="com.example.TestService", arg0="Hello")
  83     except dbus.DBusException:
  84         traceback.print_exc()
  85         print usage
  86         sys.exit(1)
  87
  88     #lets make a catchall
  89     bus.add_signal_receiver(catchall_signal_handler, interface_keyword='dbus_interface', member_keyword='member')
  90
  91     bus.add_signal_receiver(catchall_hello_signals_handler, dbus_interface = "com.example.TestService", signal_name = "HelloSignal")
  92
  93     bus.add_signal_receiver(catchall_testservice_interface_handler, dbus_interface = "com.example.TestService", message_keyword='dbus_message')
  94
  95     # Tell the remote object to emit the signal after a short delay
  96     gobject.timeout_add(2000, emit_signal)
  97
  98     loop = gobject.MainLoop()
  99     loop.run()