Dippy the Dispatcher
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Gary Mort
Dec 21, 2012, 12:00:59 PM12/21/12
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To give my brain a break from codespace, I wrote up a quick little humorous[at least I find it a little funny] description of how the Joomla Plugin system works in story format, starring Dippy the Dispatcher - an unpaid intern at a local branch of OSM International.
Instead of using code, I discuss how the system works by pretending instead that it is being used by real people at an office to handle incoming calls and visitors to the building. It's a fun little jaunt[at least it was fun for me]
Note: My site is a work in progress...at the moment I'm playing around with various defconf extensions for google analytics, so there are cookies for analytics and stuff on the site.
Donald Gilbert
Dec 21, 2012, 12:10:35 PM12/21/12
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Bookmarked for when I have more time during vacation - looks interesting!
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Glenn Arkell
Dec 21, 2012, 3:16:29 PM12/21/12
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Very entertaining... well done.
Samuel Moffatt
Dec 22, 2012, 12:45:16 AM12/22/12
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I don't think your section on "Does not photocopy" is an entirely
correct statement about the Joomla plugin system. While there is a
chain of command pattern in some places (the authentication system)
which was specifically designed to both facilitate altering the
original message and breaking out early, JDispatcher does not use that
pattern and in it's design doesn't take an opinion on the matter. It
really actually depends on the calling class and how it constructed
the arguments. If an object is being passed around then it will be
capable of being modified and this will be passed along, however if an
array of primitives is being passed then I don't see how these could
be altered.
Apart from that an interesting way of re-casting the system in
hopefully more familiar terms.
Cheers,
Sam
correct statement about the Joomla plugin system. While there is a
chain of command pattern in some places (the authentication system)
which was specifically designed to both facilitate altering the
original message and breaking out early, JDispatcher does not use that
pattern and in it's design doesn't take an opinion on the matter. It
really actually depends on the calling class and how it constructed
the arguments. If an object is being passed around then it will be
capable of being modified and this will be passed along, however if an
array of primitives is being passed then I don't see how these could
be altered.
Apart from that an interesting way of re-casting the system in
hopefully more familiar terms.
Cheers,
Sam
Niv Froehlich
Dec 22, 2012, 12:32:51 PM12/22/12
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love the idea of it!!!!!
what a great way to teach and learn ;-)
"The Dubious Adventures of Dippy the Dispatcher and his Posse in the Land of Joomla!" or something like that could take a beginner all the way through Joomla, conceptually, focusing on job functions, purposes etc.
you ever publish it, mark me down as a buyer :-)
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Gary Mort
Dec 22, 2012, 7:32:44 PM12/22/12
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On Saturday, December 22, 2012 12:45:16 AM UTC-5, Samuel Moffatt wrote:
I don't think your section on "Does not photocopy" is an entirely
correct statement about the Joomla plugin system.
You could be right, I have not made a full survey of every possible CMS event to check whether any of them use primitives as well as objects.
I know I personally have gotten bitten by things like trying to replace the content in a content plugin with some new content - building it all up in a temp variable and then doing a swap at the end:
$content = $newcontent
Only to have it be ignored because you have to replace the data IN $content in order for it to be brought back out.
I'll make sure to review plugins a bit more now that I've got my profile plugin ready for preview... The last bit of pain was setting up a method to dynamically regenerate the defines.php file in the root directory so that it doesn't get destroyed - just augmented - and then packaging up 2 plugins and 2 libraries into 1 install... it seemed to work locally - but something broke when I uploded it to my test server - so once I figure out what is breaking I can release it and move on to more fun with Joomla Plugins.
Sam Moffatt
Dec 22, 2012, 10:15:47 PM12/22/12
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It's one of those YMMV things. I know the onUserLogin casts the object to an array which makes it impossible to change later. As I said, it depends on what how it is called.
Cheers,
Sam
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