Hello, I wanted to share a few utility components with you that I found useful in my last Kamaelia program. My hope is that if others find these useful they might find their way into subversion or at least serve as a basis of discussion for similar functionality. The attached python file includes the following four components:
PeriodicTick - This component is very similar to Kamaelia.Util.Clock.CheapAndChearfulClock. It has three main improvements over the aforementioned clock. The first is that PeriodicTick does not accumulate delay errors over time. The second improvement is that PeriodicTick has an optional check_interval parameter which specifies a time period to periodically check for a termination signal. And the last improvement is the shorter name. SingleTick - This components is like PeriodicTick except that it ends after a single delay interval. It does still include the ability to check for an early termination signal. TTL - This component's name stands for Time To Live. It's used to wrap an existing component and force a shutdown of the wrapped component after a set period of time. This is particularly useful for components that don't have their own built-in timeout functionality. It uses an embedded SingleTick component to accomplish its task. The TTL component exposes all the non-private inboxes and outboxes of the wrapped component. DataSink - This component is the inverse of the DataSource component. While DataSource provides a convenient way to transition data from a procedural section of code into a Kamaelia pipeline, there was not a component to easily go the other direction. To facilitate transitioning back from Kamaelia managed code into standard procedural python, I ade the DataSink which takes data received on its inbox and stores it in a list. This is by design not thread-safe as it is intended only to be accessed after the Kamaelia pipeline has terminated. I look forward to any thoughts or comments you might have on these components. -- Steve --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "kamaelia" group. To post to this group, send email to kamaelia@googlegroups.com To unsubscribe from this group, send email to kamaelia+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/kamaelia?hl=en -~----------~----~----~----~------~----~------~--~---
utilities.py
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