decorator issue with modules dbus & gobject

[Makiavelik]

Hi,
Here is a sample code that reproduces the issue :

import logging
import unittest
import signal
import gobject
import dbus
from functools import wraps
from dbus.mainloop.glib import DBusGMainLoop

class TimeoutException(Exception):
pass

def timeout(timeout_time=1800):
"""
decorator function catching the argument
"""
def timeout_function(func):
"""
decorator function
"""
@wraps(func)
def _timeout_function(self):
"""
create a signal handler
set the timeout with the argument given while calling the
decorator @timeout
call the function
catch a timeout exception if necessary
"""
def timeout_handler(signum, frame):
print 'Timeout (%s sec) reached' % str(timeout_time)
raise TimeoutException()

old_handler = signal.signal(signal.SIGALRM,
timeout_handler)
signal.alarm(timeout_time) # triger alarm in timeout_time
seconds
try:
retval = func(self)
finally:
signal.signal(signal.SIGALRM, old_handler)
signal.alarm(0)
return retval
return _timeout_function
return timeout_function

class Test_loopRun_And_Timeout(unittest.TestCase):
def __init__(self,*args,**kwargs):
super(Test_loopRun_And_Timeout, self).__init__(*args,**kwargs)
dbus_loop = DBusGMainLoop(set_as_default=True)
self.bus = dbus.SessionBus(private=True,mainloop=dbus_loop)
self.loop = gobject.MainLoop()

logging.basicConfig()
self.__logger = logging.getLogger("Tests.%s" %
self.__class__.__name__)
self.__logger.setLevel(logging.DEBUG)

def setUp(self):
'''
in this part, mediarouter can not be created
Setup are all launch in //
So if 50 tests are run in this class, 50 mediarouters are
created
'''
pass


def tearDown(self):
'''
'''

@timeout(5)
def test_001(self):
'''
'''
self.__logger.info('[CHECKPOINT] test_001')
try:
self.__logger.info('entering a waiting loop')
self.loop.run()
self.__logger.info('dummy log, should not appear')
self.fail()

except KeyboardInterrupt:
self.__logger.exception('Catching a Ctrl+c event (user or
timeout)')
except :
self.__logger.exception('Unexpected error')
self.fail()


@timeout(5)
def test_002(self):
'''
'''
def loop_quit(loop):
loop.quit()
return False


self.__logger.info('[CHECKPOINT] test_002')
try:
self.__logger.info('entering a waiting loop')
gobject.timeout_add(1000, loop_quit, self.loop)
self.loop.run()
self.__logger.info('exiting the loop')

except KeyboardInterrupt:
self.__logger.exception('Catching a Ctrl+c event (user or
timeout)')
self.fail()
except :
self.__logger.exception('Unexpected error')
self.fail()

If I start a unittest campaign like this :

if __name__ == "__main__":
#Add the test you want to run
suite = unittest.TestSuite()

#To choose a list of tests, comment those you don't want to run
suite.addTest(Test_loopRun_And_Timeout('test_002'))
suite.addTest(Test_loopRun_And_Timeout('test_001'))
unittest.TextTestRunner(verbosity=0).run(suite)
print 'done'

the result give me 2 tests OK

Now If I launch this

if __name__ == "__main__":
#Add the test you want to run
suite = unittest.TestSuite()

#To choose a list of tests, comment those you don't want to run
suite.addTest(Test_loopRun_And_Timeout('test_001'))
suite.addTest(Test_loopRun_And_Timeout('test_002'))
unittest.TextTestRunner(verbosity=0).run(suite)
print 'done'

1 OK (test_001)
1 Fail (test_002 goes on timeout)

And if I am using more than 3 Testcases, the code is going to run in
infinite loop (Ctrl+C or timeout decorator does not work, only a kill
works)


Is there an issue using the 'timeout' decorator with the loop.run() ?

 

[Emile van Sebille]

On 8/18/2011 5:02 AM Makiavelik said...

Hi,
Here is a sample code that reproduces the issue :

Not really 'sample' enough to allow others to investigate...

ImportError: No module named gobject
ImportError: No module named dbus
ImportError: No module named dbus.mainloop.glib

Try to eliminate the non-standard dependencies. I wanted to check the
default value set in timeout but there's too much crap to clean up.

Emile

 

[Makiavelik]

On 8/18/2011 5:02 AM Makiavelik said...


Not really 'sample' enough to allow others to investigate...

ImportError: No module namedgobject
ImportError: No module nameddbus
ImportError: No module nameddbus.mainloop.glib

Try to eliminate the non-standard dependencies.  I wanted to check the
default value set in timeout but there's too much crap to clean up.

Emile

Yes that's right there is a dependency with both modules dbus and
gobject (as mentionned in the subject of the thread).

The fact is I am not able to quit the looping method of the
gobject.Mainloop object without errors ...