timeline 0.0.1

Timeline module for modelling a series of actions.

Copyright (c) 2011, Canonical Ltd

This program is free software: you can redistribute it and/or modify it under the terms of the GNU Affero General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.

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 Affero General Public License for more details.

You should have received a copy of the GNU Affero General Public License along with this program. If not, see <http://www.gnu.org/licenses/>.

The timeline package provides a way to model a series of actions. For instance, during a web request the appserver might call out to a number of backend services, make sql queries and memcached lookups. All of these actions can be tracked in a single timeline, and that serialised or analysed for slow points.

Dependencies

• Python 2.6+

• pytz

Testing Dependencies

• subunit (http://pypi.python.org/pypi/python-subunit) (optional)

• testtools (http://pypi.python.org/pypi/testtools)

Usage

Create a timeline object:

>>> from timeline.timeline import TimeLine
>>> log = TimeLine()

Then add actions:

>>> action = log.start('mycategory', 'mydetails')

Perform your action and then tell the action it has finished:

>>> action.finish()

At this point you can start another action. If you wish to nest actions, pass allow_nested=True to start().

Installation

Either run setup.py in an environment with all the dependencies available, or add the working directory to your PYTHONPATH.

Development

Upstream development takes place at https://launchpad.net/python-timeline. To setup a working area for development, if the dependencies are not immediately available, you can use ./bootstrap.py to create bin/buildout, then bin/py to get a python interpreter with the dependencies available.

To run the tests use the runner of your choice, the test suite is timeline.tests.test_suite.

For instance:

$ bin/py -m testtools.run timeline.tests.test_suite