Python cannot work as dbus server and client in the multi-thread enviroment -

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i created dbus server following code, named server1.py

#!/usr/bin/python2.7 import dbus.service import dbus.glib import glib import gobject dbus.mainloop.glib import dbusgmainloop   class app_server(dbus.service.object):     def __init__(self):         bus = dbus.sessionbus(private = true, mainloop = dbusgmainloop())         bus_name = dbus.service.busname('de.test.app1', bus)         dbus.service.object.__init__(self, bus_name, '/de/test/app1_obj_path')      @dbus.service.method("test.app1.interface",)     def is_ready(self):                    return true  def publish_dbus():     loop = glib.mainloop()     app_server()     loop.run()  if __name__ == '__main__':      gobject.threads_init()     dbus.glib.init_threads()     publish_dbus()

and want access dbus service in server1.py following code, named server2.py work dbus server.

#!/usr/bin/python2.7 import dbus.service import dbus.glib import glib import dbus.mainloop import gobject dbus.mainloop.glib import dbusgmainloop threading import thread time import sleep   class app_server(dbus.service.object):     def __init__(self):         bus = dbus.sessionbus(private = true, mainloop = dbusgmainloop())         bus_name = dbus.service.busname('de.test.app3', bus)         dbus.service.object.__init__(self, bus_name, '/de/test/app3_obj_path')      @dbus.service.method("test.app3.interface",)     def is_ready(self):                    return true  def call_dbus():     bus_name = 'de.test.app1'     obj_path = '/de/test/app1_obj_path'     interface_name = 'test.app1.interface'     count = 1     while count < 1000:         proxy_bus = dbus.sessionbus(private = true)         obj = none         try:             obj = proxy_bus.get_object(bus_name, obj_path)         except:             sleep(1)             obj = proxy_bus.get_object(bus_name, obj_path)         ready = obj.get_dbus_method('is_ready', interface_name)         ready(pid_, bin_path)         count += 1         print count   def publish_dbus():     loop = glib.mainloop()     app_server()     loop.run()  if __name__ == '__main__':     gobject.threads_init()     dbus.glib.init_threads()     th1 = thread(target = publish_dbus)     th1.start()     th2 = thread(target = call_dbus)     th2.start()     sleep(10000000)

then after run server2.py, application terminated without finished dbus call in thread "call_dbus".

and if tried follwoing code, changed code in server2.py following:

from:

 proxy_bus = dbus.sessionbus(private = true)

to:

  proxy_bus = dbus.sessionbus(private = true, mainloop = dbus.mainloop.null_main_loop)

now, there have many connnections after thread "callbus" finished using tools "d-feet" can used d-bus debugger check if dbus server ready or if dbus connection has been established.

if can make suggeston make work normally??

what i've noticed this:

  • your bus/object names don't match.
  • you create new dbus connection each time in while loop. bad idea, specially seen don't close them.
    either move call out of loop, or use shared connection (private=false)
  • you don't need own thread publish dbus object, that's mainloop anyway.
  • if run mainloop in different thread, make sure have way stop, otherwise kill way of terminating program. or put int in main thread, should @ least react ctrl-c
  • the sleep @ end of program unnecessary. long there running non-daemon threads around program won't exit anyway.

putting together, should work:

#!/usr/bin/python2.7 import dbus.service import dbus.glib import glib import dbus.mainloop import gobject dbus.mainloop.glib import dbusgmainloop threading import thread time import sleep   class app_server(dbus.service.object):     def __init__(self):         bus = dbus.sessionbus(private = true, mainloop = dbusgmainloop())         bus_name = dbus.service.busname('de.test.app3', bus)         dbus.service.object.__init__(self, bus_name, '/de/test/app3_obj_path')      @dbus.service.method("test.app3.interface",)     def is_ready(self):                    return true  def call_dbus():     bus_name = 'de.test.app3'     obj_path = '/de/test/app3_obj_path'     interface_name = 'test.app3.interface'     proxy_bus = dbus.sessionbus(private = true)     count = 1     while count < 1000:         obj = none         try:             obj = proxy_bus.get_object(bus_name, obj_path)         except:             sleep(1)             obj = proxy_bus.get_object(bus_name, obj_path)         ready = obj.get_dbus_method('is_ready', interface_name)         #ready(pid_, bin_path)         count += 1         print count    if __name__ == '__main__':     gobject.threads_init()     dbus.glib.init_threads()     loop = glib.mainloop()     server = app_server()     #th1 = thread(target = publish_dbus)     #th1.start()     th2 = thread(target = call_dbus)     th2.start()     loop.run()

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