Deploying Symfony2 app with Capifony - APC loader still uses previous release

Question

I've recently upgraded my Symfony2 application to 2.1 and migrated it to a new server, so I figured I'd configure Capifony to make deploying simpler. Everything has gone great except for the fact that it now doesn't make use of the APCLoader, so I've had to comment this out temporarily until it's sorted.

Here's the relevant code from app.php:

$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.

$loader = new ApcClassLoader('my_prefix', $loader);
$loader->register(true);

The problem is that 'my_prefix' isn't unique per release so it'll end up trying to look for cached files that belong to previous releases, which may or may not still be there. This is obviously a very big problem!

What would be the best solution for this? Should I somehow write a task that capifony will run before deploying that changes the prefix to something unique, such as the #{latest_release} variable? Or should I somehow reset the entire contents of the APC cache after each deploy?

I'm not too sure of the best way to do either of these things, so if you'd recommend one of them could you please point me in the right direction to be able to implement it? Or is there an alternative solution that I haven't thought of?

Answer 1

You could use the ApcBundle, which provides a command that will create new file in the web/ directory, execute it through HTTP, then remove it. Then, you could use your run "/path/to/app/console apc:clear" command in your deployment script.