Jeff Carouth

Web and mobile developer. Agile apprentice.

Object Oriented Power, Err, Programming

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I started working on integration between three libraries that were not meant to work together. Well, I should say they were not developed with this type of integration in mind. Naturally there were some roadblocks, but eventually I was able to overcome them and create what should be a decently elegant solution. But that’s a post for another day. This post is targeted at developers searching for the purpose of Object Oriented Programming.

I suppose it’s not a secret that I make liberal use of the Zend Framework. (It’s nothing personal Symfony, CodeIgnitor, Django, etc., Zend Framework just fits my style!) Part of my integration experiment led me to ZF-7367 because I too needed to tell the front controller to return the response rather than output it. The first instinct is to hack up the copy of the Zend Framework to make this work. The patch suggested in the issue gets us part of the way there, but we also have to hack on the Zend_Application component including the Bootstrap implementation. This would make future upgrades a pain if this feature request is rejected, so it’s obviously not the best solution.

Thinking about the problem a little deeper I immediately realized that I already extend the Zend_Application_Bootstrap_Bootstrap (yes, the naming scheme is quite verbose and suffers from a bit of redundant redundancy…) so it should not be too difficult to override the run() method to do what I want. Let’s look at the original run() method inside Zend_Application_Bootstrap_Bootstrap.

[php]/* * Run the application * * Checks to see that we have a default controller directory. If not, an * exception is thrown. * * If so, it registers the bootstrap with the ‘bootstrap’ parameter of * the front controller, and dispatches the front controller. * * @return void * @throws Zend_Application_Bootstrap_Exception / public function run() { $front = $this->getResource(‘FrontController’); $default = $front->getDefaultModule(); if (null === $front->getControllerDirectory($default)) { throw new Zend_Application_Bootstrap_Exception( ‘No default controller directory registered with front controller’ ); }

$front->setParam(‘bootstrap’, $this); $front->dispatch(); }[/php]

All we really need to do here is configure the front controller instance to return the response object which is accomplished using the Zend_Controller_Front::returnResponse(bool) method. Inside the application bootstrap class we simply use this implementation:

[php] public function run() { $front = $this->getResource(‘FrontController’); $front->returnResponse(true);


return $front->getResponse(); } [/php]

Now I have the response I need returned from the bootstrap file, but the Zend_Application::run() method does not return this value. Here’s where what I’ve been rambling about should click. I merely have to override the Zend_Application::run() method with one of my own, like so:

[php]class My_Application extends Zend_Application { public function run() { return $this->getBootstrap()->run(); } }[/php]

This protects me from hassle when my copy of the Zend Framework needs updates or upgrades but still allows for the functionality I needed. In the index.php file I switch out all references to Zend_Application with My_Application and everything should roll.