/**
* Initialises a new instance of the cache store given the definition the instance is to be used for.
*
* This function should prepare any given connections etc.
*
* @param cache_definition $definition
* @return bool
*/
public function initialise(cache_definition $definition)
{
$this->definition = $definition;
$definition_id = $definition->get_mode() . '/' . $definition->get_component() . '/' . $definition->get_area();
$this->prefix = $this->name . '/data/' . $definition_id . '/';
$this->prefix_lock = $this->name . '/lock/' . $definition_id . '/';
$this->prefix_length = strlen($this->prefix);
return true;
}