Class: cache_cached_object  - X-Ref

A cached object wrapper.

This class gets used when the data is an object that has implemented the cacheable_object interface.

Class: cache_ttl_wrapper  - X-Ref

A wrapper class used to handle ttl when the cache store doesn't natively support it.

This class is exactly why you should use event driving invalidation of cache data rather than relying on ttl.

Class: cache_exception  - X-Ref

A cache exception class. Just allows people to catch cache exceptions.

Class: cacheable_object_array  - X-Ref

An array of cacheable objects.

This class allows a developer to create an array of cacheable objects and store that.
The cache API doesn't check items within an array to see whether they are cacheable. Such a check would be very costly to both
arrays using cacheable object and those that don't.
Instead the developer must explicitly use a cacheable_object_array instance.

The following is one example of how this class can be used.
<code>
$data = array();
$data[] = new cacheable_object('one');
$data[] = new cacheable_object('two');
$data[] = new cacheable_object('three');
$cache->set(new cacheable_object_array($data));
</code>
Another example would be
<code>
$data = new cacheable_object_array();
$data[] = new cacheable_object('one');
$data[] = new cacheable_object('two');
$data[] = new cacheable_object('three');
$cache->set($data);
</code>