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 * @category   cache
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 * @category   cache
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 * @copyright  2012 Sam Hemelryk
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 * @copyright  2012 Sam Hemelryk
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 * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
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 * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
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 */
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 */
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use core_cache\definition;
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use core_cache\key_aware_cache_interface;
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use core_cache\searchable_cache_interface;
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use core_cache\store;
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defined('MOODLE_INTERNAL') || die();
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defined('MOODLE_INTERNAL') || die();
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/**
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/**
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 * The session data store class.
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 * The session data store class.
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 *
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 *
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 * @copyright  2012 Sam Hemelryk
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 * @copyright  2012 Sam Hemelryk
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 * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
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 * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
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 */
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 */
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abstract class session_data_store extends cache_store {
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abstract class session_data_store extends store {
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    /**
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    /**
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 * The Session store class.
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 * The Session store class.
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 *
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 *
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 * @copyright  2012 Sam Hemelryk
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 * @copyright  2012 Sam Hemelryk
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 * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
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 * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
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 */
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 */
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class cachestore_session extends session_data_store implements cache_is_key_aware, cache_is_searchable {
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class cachestore_session extends session_data_store implements key_aware_cache_interface, searchable_cache_interface {
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    /**
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    /**
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     * The name of the store
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     * The name of the store
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     * @var store
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     * @var store
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     */
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     */
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    protected $name;
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    protected $name;
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    /**
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    /**
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     * Constructs the store instance.
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     * Constructs the store instance.
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     *
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     *
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     * Noting that this function is not an initialisation. It is used to prepare the store for use.
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     * Noting that this function is not an initialisation. It is used to prepare the store for use.
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     * The store will be initialised when required and will be provided with a cache_definition at that time.
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     * The store will be initialised when required and will be provided with a definition at that time.
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     *
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     *
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     * @param string $name
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     * @param string $name
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     * @param array $configuration
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     * @param array $configuration
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     */
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     */
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    }
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    }
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    /**
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    /**
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     * Returns true if the given mode is supported by this store.
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     * Returns true if the given mode is supported by this store.
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     *
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     *
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     * @param int $mode One of cache_store::MODE_*
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     * @param int $mode One of store::MODE_*
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     * @return bool
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     * @return bool
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     */
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     */
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    public static function is_supported_mode($mode) {
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    public static function is_supported_mode($mode) {
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        return ($mode === self::MODE_SESSION);
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        return ($mode === store::MODE_SESSION);
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    }
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    }
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    /**
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    /**
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     * Initialises the cache.
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     * Initialises the cache.
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     *
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     *
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     * Once this has been done the cache is all set to be used.
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     * Once this has been done the cache is all set to be used.
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     *
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     *
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     * @param cache_definition $definition
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     * @param definition $definition
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     */
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     */
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    public function initialise(cache_definition $definition) {
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    public function initialise(definition $definition) {
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        $this->storeid = $definition->generate_definition_hash();
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        $this->storeid = $definition->generate_definition_hash();
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        $this->store = &self::register_store_id($this->name.'-'.$definition->get_id());
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        $this->store = &self::register_store_id($this->name.'-'.$definition->get_id());
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        $this->ttl = $definition->get_ttl();
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        $this->ttl = $definition->get_ttl();
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    }
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    }
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    /**
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    /**
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     * Generates an instance of the cache store that can be used for testing.
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     * Generates an instance of the cache store that can be used for testing.
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     *
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     *
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     * @param cache_definition $definition
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     * @param definition $definition
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     * @return cachestore_session
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     * @return cachestore_session
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     */
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     */
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    public static function initialise_test_instance(cache_definition $definition) {
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    public static function initialise_test_instance(definition $definition) {
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        // Do something here perhaps.
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        // Do something here perhaps.
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        $cache = new cachestore_session('Session test');
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        $cache = new cachestore_session('Session test');
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        $cache->initialise($definition);
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        $cache->initialise($definition);
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        return $cache;
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        return $cache;