How to cache in Symfony 2?

Question

I need to cache some application specific data using Symfony 2's caching system so that I can run cache:clear to clear it. All the cache relies under app/cache but how do I actually go about caching data?

http://symfony.com/doc/current/cookbook/index.html

The only topic I see is about HTML caching with Varnish.

Answer 1

If you are using Doctrine already just use those cache classes.

Add a service to config.yml:

services:     cache:         class: Doctrine\Common\Cache\ApcCache 

And use it in your controller:

if ($fooString = $this->get('cache')->fetch('foo')) {     $foo = unserialize($fooString); } else {     // do the work     $this->get('cache')->save('foo', serialize($foo)); } 

Answer 2

Simple way use Doctrine cache providers. At first, register service(sample in config.yml):

services:     memcached:         class: Memcached         calls:             - [ addServer, ['localhost', 11211] ]     memcached_cache:         class: Doctrine\Common\Cache\MemcachedCache         calls:             - [ setMemcached, [@memcached] ] 

Then to use get service, for example in controler:

$cache = $this->get('memcached_cache'); 

to send in another service use calls:

calls:     - [ setCacheProvider, [@memcached_cache] ] 

or arguments:

arguments:     - @memcached_cache 

In the same way, you can use other interfaces of Doctrine Cache package. Doctrine Cache provides a very simple interface for which several out of the box implementations are provided:

• ApcCache (requires ext/apc)
• ArrayCache (in memory, lifetime of the request)
• FilesystemCache (not optimal for high concurrency)
• MemcacheCache (requires ext/memcache)
• MemcachedCache (requires ext/memcached)
• PhpFileCache (not optimal for high concurrency)
• RedisCache.php (requires ext/phpredis)
• WinCacheCache.php (requires ext/wincache)
• XcacheCache.php (requires ext/xcache)
• ZendDataCache.php (requires Zend Server Platform)

If you do not already use Doctrine, you may require Common Library for Doctrine projects: php composer.phar require doctrine/common or require only Caching library offering an object-oriented API for many cache backends: php composer.phar require doctrine/cache

How to use Doctrine Caching you can read in Doctrine Common documentation on Doctrine Project web site