January 2010
Intermediate to advanced
479 pages
11h 5m
English
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Chapter 14. Writing Strophe Plug-ins
WHAT'S IN THIS CHAPTER?
Using Strophe plug-ins
Creating plug-ins
Adding namespaces to Strophe
Building a simple roster plug-in
The applications in this book were all written using Strophe's primitive functions to build and send XMPP stanzas. Developing the code this way provided valuable visibility into how the various extensions of XMPP work. In real applications, however, it is nice to develop some abstractions to reduce some of the grunt work. Strophe allows users to build and load plug-ins that extend its functionality so that such abstractions can be built by developers and used by applications.
As an example, recall that in Chapter 9 you built SketchCast, which broadcast drawing events to a pubsub node for subscribers to watch. The application's code created subscription stanzas, node creation stanzas, and configuration stanzas to accomplish its tasks. Imagine if there was a pubsub plug-in for Strophe that encapsulated this logic for you. Code using this plug-in might appear as follows:
SketchCast.connection.pubsub.create(
SketchCast.node, SketchCast.created, SketchCast.create_error);
SketchCast.connection.pubsub.configure(
SketchCast.node, {"max_items": 20},
SketchCast.configured, SketchCast.configure_error);This version of the code is no less correct, but much shorter and more clear. The details of how to build the various stanzas required for the operations are hidden behind the plug-in's interface, leaving you to think about your own application's ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.