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add backtraces to exceptions

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This commit is contained in:
Christophe Benz 2010-05-13 22:52:34 +02:00
commit 5bdc7605e5
1 changed files with 40 additions and 42 deletions
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82
weboob/bcall.py
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@ -1,22 +1,19 @@
# -*- coding: utf-8 -*-
"""
Copyright(C) 2010 Romain Bignon
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, version 3 of the License.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
"""
# Copyright(C) 2010 Romain Bignon, Christophe Benz
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, version 3 of the License.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
from __future__ import with_statement
@ -29,7 +26,8 @@ __all__ = ['BackendsCall', 'CallErrors']
class CallErrors(Exception):
def __init__(self, errors):
Exception.__init__(self, u"Several errors have been raised:\n%s" % (u'\n'.join((u'%s: %s' % (b, e)) for b, e in errors)))
Exception.__init__(self, u'These errors have been raised in backend threads:\n%s' % (
u'\n'.join((u' * %s: %s\n%s' % (backend, error, backtrace)) for backend, error, backtrace in errors)))
self.errors = copy(errors)
def __iter__(self):
@ -76,53 +74,53 @@ class BackendsCall(object):
# Create jobs for each backend
with self.mutex:
for b in backends:
debug('New timer for %s' % b)
self.threads.append(Timer(0, self._caller, (b, function, args, kwargs)).start())
for backend in backends:
debug('Creating a new thread for %s' % backend)
self.threads.append(Timer(0, self._caller, (backend, function, args, kwargs)).start())
if not backends:
self.finish_event.set()
def _store_error(self, b, e):
def _store_error(self, backend, error):
with self.mutex:
# TODO save backtrace and/or print it here (with debug)
self.errors.append((b, e))
debug(get_backtrace(e))
backtrace = get_backtrace(error)
self.errors.append((backend, error, backtrace))
def _store_result(self, b, r):
def _store_result(self, backend, result):
with self.mutex:
self.responses.append((b,r))
self.responses.append((backend, result))
self.response_event.set()
def _caller(self, b, function, args, kwargs):
debug('Hello from timer %s' % b)
with b:
def _caller(self, backend, function, args, kwargs):
debug('%s: Thread created successfully' % backend)
with backend:
try:
# Call method on backend
try:
debug('%s: Calling function %s' % (backend, function))
if callable(function):
r = function(b, *args, **kwargs)
result = function(backend, *args, **kwargs)
else:
r = getattr(b, function)(*args, **kwargs)
except Exception, e:
self._store_error(b, e)
result = getattr(backend, function)(*args, **kwargs)
except Exception, error:
self._store_error(backend, error)
else:
debug('%s: Got answer! %s' % (b, r))
debug('%s: Called function %s returned: "%s"' % (backend, function, result))
if hasattr(r, '__iter__'):
if hasattr(result, '__iter__'):
# Loop on iterator
try:
for e in r:
for subresult in result:
# Lock mutex only in loop in case the iterator is slow
# (for example if backend do some parsing operations)
self._store_result(b, e)
except Exception, e:
self._store_error(b, e)
self._store_result(backend, subresult)
except Exception, error:
self._store_error(backend, error)
else:
self._store_result(b, r)
self._store_result(backend, result)
finally:
with self.mutex:
# This backend is now finished
self.backends[b.name] = True
self.backends[backend.name] = True
for finished in self.backends.itervalues():
if not finished:
return