View source for Developers/Custom Kernel

Sometimes it's required to use additional bundles. Since the bundle list in the [https://github.com/partkeepr/PartKeepr/blob/master/app/AppKernel.php AppKernel] is pretty much static and there's no plugin system yet, the recommended way is to create a custom kernel:

= Basics =
<pre>
# app/MyCustomAppKernel.php
use Symfony\Component\HttpKernel\Kernel;

class MyCustomAppKernel extends AppKernel {
    public function getCustomBundles () {
        $customBundles = [];
        $customBundles[] = new My\Custom\Bundle();
        return $customBundles;
    }
}
</pre>

Then create a custom app.php which uses the custom app kernel:

<pre>
<?php

use Symfony\Component\ClassLoader\ApcClassLoader;
use Symfony\Component\HttpFoundation\Request;

$loader = require_once __DIR__.'/../app/bootstrap.php.cache';

// Use APC for autoloading to improve performance.
// Change 'sf2' to a unique prefix in order to prevent cache key conflicts
// with other applications also using APC.
/*
$apcLoader = new ApcClassLoader('sf2', $loader);
$loader->unregister();
$apcLoader->register(true);
*/
require_once __DIR__.'/../app/AppKernel.php';
require_once __DIR__.'/../app/MyCustomAppKernel.php';
//require_once __DIR__.'/../app/AppCache.php';

$kernel = new MyCustomAppKernel('prod', false);
$kernel->loadClassCache();
//$kernel = new AppCache($kernel);
$request = Request::createFromGlobals();
$response = $kernel->handle($request);
$response->send();
$kernel->terminate($request, $response);
</pre>

To avoid overwriting, you can create a file like app_custom.php and set your DirectoryIndex to that file.

= Custom Kernel Use Case =

A good use case for a custom kernel is if you wish to operate PartKeepr with sessions stored in redis. To do that, add the Redis Bundle to the overridden kernel:

<pre>
# app/MyCustomAppKernel.php
use Symfony\Component\HttpKernel\Kernel;

class MyCustomAppKernel extends Kernel {
    public function getCustomBundles () {
        $customBundles = [];
        $customBundles[] = new Snc\RedisBundle\SncRedisBundle();
        return $customBundles;
    }
}
</pre>

Then adjust your app.php and configure the bundle.