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"""
raven.context
~~~~~~~~~~~~~
:copyright: (c) 2010-2012 by the Sentry Team, see AUTHORS for more details.
:license: BSD, see LICENSE for more details.
"""
from __future__ import absolute_import
from collections import Mapping, Iterable
from threading import local
from weakref import ref as weakref
from raven.utils.compat import iteritems
try:
from thread import get_ident as get_thread_ident
except ImportError:
from _thread import get_ident as get_thread_ident
_active_contexts = local()
def get_active_contexts():
"""Returns all the active contexts for the current thread."""
try:
return list(_active_contexts.contexts)
except AttributeError:
return []
class Context(local, Mapping, Iterable):
"""
Stores context until cleared.
>>> def view_handler(view_func, *args, **kwargs):
>>> context = Context()
>>> context.merge(tags={'key': 'value'})
>>> try:
>>> return view_func(*args, **kwargs)
>>> finally:
>>> context.clear()
"""
def __init__(self, client=None):
breadcrumbs = raven.breadcrumbs.make_buffer(
client is None or client.enable_breadcrumbs)
if client is not None:
client = weakref(client)
self._client = client
# Because the thread auto activates the thread local this also
# means that we auto activate this thing. Only if someone decides
# to deactivate manually later another call to activate is
# technically necessary.
self.activate()
self.data = {}
self.exceptions_to_skip = set()
self.breadcrumbs = breadcrumbs
@property
def client(self):
if self._client is None:
return None
return self._client()
def __hash__(self):
return id(self)
def __eq__(self, other):
return self is other
def __ne__(self, other):
return not self.__eq__(other)
def __getitem__(self, key):
return self.data[key]
def __iter__(self):
return iter(self.data)
def __len__(self):
return len(self.data)
def __repr__(self):
return '<%s: %s>' % (type(self).__name__, self.data)
def __enter__(self):
self.activate()
return self
def __exit__(self, exc_type, exc_value, tb):
self.deactivate()
def activate(self, sticky=False):
if sticky:
self._sticky_thread = get_thread_ident()
_active_contexts.__dict__.setdefault('contexts', set()).add(self)
def deactivate(self):
try:
_active_contexts.contexts.discard(self)
except AttributeError:
pass
def merge(self, data, activate=True):
if activate:
self.activate()
d = self.data
for key, value in iteritems(data):
if key in ('tags', 'extra'):
d.setdefault(key, {})
for t_key, t_value in iteritems(value):
d[key][t_key] = t_value
else:
d[key] = value
def set(self, data):
self.data = data
def get(self):
return self.data
def clear(self, deactivate=None):
self.data = {}
self.exceptions_to_skip.clear()
self.breadcrumbs.clear()
# If the caller did not specify if it wants to deactivate the
# context for the thread we only deactivate it if we're not the
# thread that created the context (main thread).
if deactivate is None:
client = self.client
if client is not None:
deactivate = get_thread_ident() != client.main_thread_id
if deactivate:
self.deactivate()
import raven.breadcrumbs