}
/**
- * Hashes a descriptive key to make it shorter and stil unique.
- * @param string $key
+ * Hashes a descriptive key to make it shorter and still unique.
+ * @param string|int $key
+ * @param cache_definition $definition
* @return string
*/
- public static function hash_key($key) {
- return crc32($key);
+ public static function hash_key($key, cache_definition $definition) {
+ if ($definition->uses_simple_keys()) {
+ // We put the key first so that we can be sure the start of the key changes.
+ return (string)$key . '-' . $definition->generate_single_key_prefix();
+ }
+ $key = $definition->generate_single_key_prefix() . '-' . $key;
+ return sha1($key);
}
+
+ /**
+ * Finds all definitions and updates them within the cache config file.
+ *
+ * @param bool $coreonly If set to true only core definitions will be updated.
+ */
+ public static function update_definitions($coreonly = false) {
+ global $CFG;
+ // Include locallib
+ require_once($CFG->dirroot.'/cache/locallib.php');
+ // First update definitions
+ cache_config_writer::update_definitions($coreonly);
+ // Second reset anything we have already initialised to ensure we're all up to date.
+ cache_factory::reset();
+ }
}
