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pypm install collective.timedevents

How to install collective.timedevents

  1. Download and install ActivePython
  2. Open Command Prompt
  3. Type pypm install collective.timedevents
 Python 2.7Python 3.2Python 3.3
Windows (32-bit)
0.2.1 Available View build log
0.1.1 Available View build log
Windows (64-bit)
0.2.1 Available View build log
0.1.1 Available View build log
Mac OS X (10.5+)
0.2.1 Available View build log
0.1.1 Available View build log
Linux (32-bit)
0.2.1 Available View build log
0.1.1 Available View build log
Linux (64-bit)
0.2.1 Available View build log
0.1.1 Available View build log
Lastest release
version 0.2.1 on May 23rd, 2012


This is a developer level product. This product is indended to replace Products.TickingMachine with more robust Zope 3 codebase.


  1. Install collective.timedevents

Add the following to your buildout.cfg:

eggs =

Add clock server to tick timedevents subscribers - use your Plone instance name:

zope-conf-additional =
            method /mysite/@@tick
            period 90
        user admin
            password adminpassword
            host localhost
  1. Add collective.timedevents.interfaces.ITickEvent subscribers to your product ZCML declarations.


  2. Configure your event handler to react after certain period has expired:

    from zope.app.component.hooks import getSite
    def on_tick(event):
        """ Do something after one hour has elapsed """
        interval_in_days = 1.0 / 24.0 # One hour, floating point
        context = site.my_magic_context # Persistent object which stores our timing data
        if event.last_tick > context.last_action + interval_in_days: # Check whether enough time has elaped
            context.last_action = event.last_tick # Store when we last time did something


All ticking code is executed under admin privileges. Tick period is 300 seconds by default. This can be controlled in views.py. Ticks are logged by events.tick_logger defined in configure.zcml.

The product is loosely connected to Plone, but can be used standalone with little modifications.

Quality assurance

This product fills the following quality criteria:

  • Unit tests provided
  • Good documentation provided
  • Commented code
  • PyPi eggs provided


Cron like "on day/hour/minute X" like subscribers could be added.


  • Mikko Ohtamaa
  • Quintagroup
  • The orignal concept and code was created by Tomasz J. Kotarba

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Last updated May 23rd, 2012

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