← All changes | inc/attachment_cache.php +34 -6 3.11.0 → trunk View file →

		@@ -3,11 +3,22 @@
3	3	/**
4	4	* Class Optml_Attachment_Cache.
5	5	*/
6	6	class Optml_Attachment_Cache {
7		- const CACHE_GROUP = 'optml_attachment_ids';
8		-
	7	+ const CACHE_GROUP = 'om_att';
9	8	/**
	9	+ * Local cache map.
	10	+ *
	11	+ * @var array
	12	+ */
	13	+ private static $cache_map = [];
	14	+ /**
	15	+ * Reset the memory cache.
	16	+ */
	17	+ public static function reset() {
	18	+ self::$cache_map = [];
	19	+ }
	20	+ /**
10	21	* Get the cached attachment ID.
11	22	*
12	23	* @param string $url the URL of the attachment.
13	24	*
		@@ -13,11 +24,21 @@
13	24	*
14	25	* @return bool|mixed
15	26	*/
16	27	public static function get_cached_attachment_id( $url ) {
	28	+
	29	+ // We cache also in memory to avoid calling DB every time when not using Object Cache.
17	30	$cache_key = self::get_cache_key( $url );
	31	+ if ( isset( self::$cache_map[ $cache_key ] ) ) {
	32	+ return self::$cache_map[ $cache_key ];
	33	+ }
18	34
19		- return wp_cache_get( $cache_key, self::CACHE_GROUP );
	35	+ $value = wp_using_ext_object_cache()
	36	+ ? wp_cache_get( $cache_key, self::CACHE_GROUP )
	37	+ : get_transient( self::CACHE_GROUP . $cache_key );
	38	+ self::$cache_map[ $cache_key ] = $value;
	39	+
	40	+ return $value;
20	41	}
21	42
22	43	/**
23	44	* Set the cached attachment ID.
		@@ -28,10 +49,17 @@
28	49	* @return void
29	50	*/
30	51	public static function set_cached_attachment_id( $url, $id ) {
31	52	$cache_key = self::get_cache_key( $url );
32		-
33		- wp_cache_set( $cache_key, $id, self::CACHE_GROUP, DAY_IN_SECONDS );
	53	+ // We cache also in memory to avoid calling DB every time when not using Object Cache.
	54	+ self::$cache_map[ $cache_key ] = $id;
	55	+ // If the ID is not found we cache for 10 minutes, otherwise for a week.
	56	+ // We try to reduce the cache time when is not found to
	57	+ // avoid caching for situation when this might be temporary.
	58	+ $expiration = $id === 0 ? ( 10 * MINUTE_IN_SECONDS ) : WEEK_IN_SECONDS;
	59	+ wp_using_ext_object_cache()
	60	+ ? wp_cache_set( $cache_key, $id, self::CACHE_GROUP, $expiration )
	61	+ : set_transient( self::CACHE_GROUP . $cache_key, $id, $expiration );
34	62	}
35	63
36	64	/**
37	65	* Generate cache key for URL.
		@@ -42,7 +70,7 @@
42	70	*/
43	71	private static function get_cache_key( $url ) {
44	72	$url = strtok( $url, '?' );
45	73
46		- return 'attachment_id_' . crc32( $url );
	74	+ return 'id_' . crc32( $url );
47	75	}
48	76	}