StrokerCache

This module provides a full page cache solution for Zend Framework 2.

Installation

Installation of StrokerCache uses composer. For composer documentation, please refer to getcomposer.org.

cd my/project/directory
create or modify the composer.json file within your ZF2 application file with following contents:
```
{
    "require": {
        "stroker/cache": "*"
    }
}
```
install composer via curl -s https://getcomposer.org/installer | php (on windows, download https://getcomposer.org/installer and execute it with PHP). Then run php composer.phar install
open my/project/directory/configs/application.config.php and add the following key to your modules:
```
'StrokerCache',
```

Setup cache rules

Copy the file strokercache.local.php.dist to your config/autoload directory and rename to strokercache.local.php. Edit this file to reflect your needs.

The module provides several strategies to determine if a page should be cached.

By routename
By controller classname
By regex on the URI
Disable caching for authenticated users

Examples

Caching the home route:

<?php
return array(
    'strokercache' => array(
        'strategies' => array(
            'enabled' => array(
                'StrokerCache\Strategy\RouteName' => array(
                    'routes' => array(
                        'home'
                    ),
                ),
            ),
        ),
    ),
);

Caching the foo/bar route, but only for a GET request and only when the param id equals 60

<?php
return array(
    'strokercache' => array(
        'strategies' => array(
            'enabled' => array(
                'StrokerCache\Strategy\RouteName' => array(
                    'routes' => array(
                        'foo/bar' => array(
                            'http_methods' => array('GET'),
                            'params' => array('id' => 60)
                        )
                    ),
                ),
            ),
        ),
    ),
);

Change storage adapter

Storage adapter can be changed by configuration. Configuration structure is the same a StorageFactory consumes. See the ZF2 reference guide. By default filesystem storage is used.

Example using APC:

<?php
return array(
    'strokercache' => array(
        'storage_adapter' => array(
            'apc'
        ),
    ),
);

Clearing the cache

You can invalidate cache items using the provided console route. Alternatively you could pull strokercache_service from the servicelocator and call clearByTags directly from you application (i.e. from an event listener).

Run the following command from your project root: php public/index.php strokercache clear <tags>

Multiple tags can be seperated by a ,. Every page which is cached by StrokerCache is identified using the following tags:

route_<routename>: Contains the matched routename of the page
controller_<controllername>: Contains the controllername
param_<paramname>_<paramvalue>: One tag for every route param

To clear every page renderered by the someAction in MyNamespace\MyController do the following: php public/index.php strokercache clear controller_MyNamespace\MyController,param_action:some

To clear the route with alias player but only for the player with id 60. php public/index.php strokercache clear route_player,param_id_60

Custom strategies

You can create your own strategies by implementing the StrokerCache\Strategy\StrategyInterface. Now register your strategy to the pluginManager:

<?php
return array(
    'strokercache' => array(
        'strategies' => array(
            'plugin_manager' => array(
                'invokables' => array(
                    'MyNamespace\MyCustomStrategy'
                ),
            ),
        ),
    ),
);

Next you need to enable the strategy

<?php
return array(
    'strokercache' => array(
        'strategies' => array(
            'enabled' => array(
                'MyNamespace\MyCustomStrategy'
            ),
        ),
    ),
);

Events

The cache service triggers several events you can utilize to add some custom logic whenever saving/loading the cache happens. The events are listed as constants in the CacheEvent class:

EVENT_LOAD: triggered when the requested page is found in the cache and ready to be served to the client
EVENT_SAVE: triggered when your page is stored in the cache storage
EVENT_SHOULDCACHE: this event is used to determine if a page should be stored into the cache. You can listen to this event don't want the page to be cached at an early stage.

TODO add some examples

smartssa/zf2-fullpage-cache