def exit(self):
"""
Called before the user exits IPython, notifying each registered
plugin
"""
logger.debug('Exiting')
self.run_callback(self.CB_EXIT, self.__class__.__name__)
for name, inst in self._extensions.iteritems():
if inst is self:
continue
logger.debug('Plugin exit: %s' % name)
try:
inst.exit()
except Exception as ex:
print('Plugin %s exit failed: (%s) %s' %
(name, ex.__class__.__name__, ex))
util.print_traceback(ex)
# Detach the pyepics context or some background tasks might delay
# exiting
class CA_NoOperation(object):
def ca_name(self, id):
return ''
epics.ca.detach_context()
epics.ca.libca = CA_NoOperation()
self._shell_exit()
def run_callback(self, name, handle_exceptions=True, show_traceback=None,
**kwargs):
"""
Trigger a previously registered callback
:param name: The callback name
:param handle_exceptions: Catch exceptions and continue processing other
callbacks
:param show_traceback: A file-like object indicating where to print the
traceback to (or None to disable)
:param kwargs: Keyword arguments to be passed to the callback functions
"""
for fcn in self._cb_dict[name]:
try:
fcn(**kwargs)
except Exception as ex:
if handle_exceptions:
self.logger.debug('Callback %s failed' % (name, ),
exc_info=True)
if show_traceback is not None:
print('Callback %s failed' % (name, ))
util.print_traceback(ex, f=show_traceback)
else:
raise
