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// GNU General Public License for more details.
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// GNU General Public License for more details.
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//
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//
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// You should have received a copy of the GNU General Public License
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// You should have received a copy of the GNU General Public License
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// along with Moodle.  If not, see <http://www.gnu.org/licenses/>.
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// along with Moodle.  If not, see <http://www.gnu.org/licenses/>.
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/**
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 * APCu cache store main library.
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 *
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use core_cache\configurable_cache_interface;
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 * @package    cachestore_apcu
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use core_cache\definition;
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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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 */
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use core_cache\key_aware_cache_interface;
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defined('MOODLE_INTERNAL') || die();
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use core_cache\store;
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/**
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/**
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 * The APCu cache store class.
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 * The APCu cache store class.
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 *
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 *
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 * @package    cachestore_apcu
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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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class cachestore_apcu extends cache_store implements cache_is_key_aware, cache_is_configurable {
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 */
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class cachestore_apcu extends store implements configurable_cache_interface, key_aware_cache_interface {
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    /**
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    /**
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     * The required version of APCu for this extension.
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     * The required version of APCu for this extension.
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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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     * The definition used when this instance was initialised.
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     * The definition used when this instance was initialised.
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     * @var cache_definition
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     * @var definition
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     */
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     */
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    protected $definition = null;
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    protected $definition = null;
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    }
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    }
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    /**
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    /**
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     * Static method to check if a store is usable with the given mode.
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     * Static method to check if a store is usable with the given mode.
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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 $mode One of store::MODE_*
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     * @return bool True if the mode is supported.
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     * @return bool True if the mode is supported.
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     */
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     */
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    public static function is_supported_mode($mode) {
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    public static function is_supported_mode($mode) {
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        return ($mode === self::MODE_APPLICATION || $mode === self::MODE_SESSION);
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        return ($mode === self::MODE_APPLICATION || $mode === self::MODE_SESSION);
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    /**
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    /**
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     * Initialises a new instance of the cache store given the definition the instance is to be used for.
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     * Initialises a new instance of the cache store given the definition the instance is to be used for.
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     *
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     *
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     * This function should prepare any given connections etc.
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     * This function should prepare any given connections etc.
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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 bool
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     * @return bool
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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->definition = $definition;
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        $this->definition = $definition;
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        $this->cacheprefix = $this->storeprefix.$definition->generate_definition_hash().'__';
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        $this->cacheprefix = $this->storeprefix.$definition->generate_definition_hash().'__';
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        return true;
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        return true;
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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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     * Returns an instance of the cache store, or false if one cannot be created.
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     * Returns an instance of the cache store, or false if one cannot be created.
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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 cache_store
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     * @return store
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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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        $testperformance = get_config('cachestore_apcu', 'testperformance');
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        $testperformance = get_config('cachestore_apcu', 'testperformance');
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        if (empty($testperformance)) {
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        if (empty($testperformance)) {
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            return false;
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            return false;
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        }
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        }
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        if (!self::are_requirements_met()) {
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        if (!self::are_requirements_met()) {