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# Copyright 2010 Canonical Ltd. This software is licensed under the
# GNU Affero General Public License version 3 (see the file LICENSE).
"""Manage a Timeline for a request."""
__all__ = [
'get_request_timeline',
'set_request_timeline',
]
__metaclass__ = type
from timeline import Timeline
# XXX RobertCollins 2010-09-01 bug=623199: Undesirable but pragmatic.
# Because of this bug, rather than using request.annotations we have
# to work in with the webapp.adapter request model, which is
# different to that used by get_current_browser_request.
from canonical.launchpad import webapp
def get_request_timeline(request):
"""Get a `Timeline` for request.
This should ideally return the request.annotations['timeline'], creating it
if necessary. However due to bug 623199 it instead using the adapter
context for 'requests'. Once bug 623199 is fixed it will instead use the
request annotations.
:param request: A zope/launchpad request object.
:return: A timeline.timeline.Timeline object for the request.
"""
try:
return webapp.adapter._local.request_timeline
except AttributeError:
return set_request_timeline(request, Timeline())
# Disabled code path: bug 623199, ideally we would use this code path.
return request.annotations.setdefault('timeline', Timeline())
def set_request_timeline(request, timeline):
"""Explicitly set a timeline for request.
This is used by code which wants to manually assemble a timeline.
:param request: A zope/launchpad request object.
:param timeline: A Timeline.
"""
webapp.adapter._local.request_timeline = timeline
return timeline
# Disabled code path: bug 623199, ideally we would use this code path.
request.annotations['timeline'] = timeline
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