Changed caching invalidation by using increment to using microtime.

peterfabian · peterfabian · commit b3115bccc5ea · 2019-11-03T14:14:53.000+01:00
This is a similar problem that WP core faced in https://core.trac.wordpress.org/ticket/23448.
diff --git a/includes/class-wc-cache-helper.php b/includes/class-wc-cache-helper.php
@@ -94,7 +94,7 @@ public static function get_cache_prefix( $group ) {
 		$prefix = wp_cache_get( 'wc_' . $group . '_cache_prefix', $group );
 
 		if ( false === $prefix ) {
-			$prefix = 1;
+			$prefix = microtime();
 			wp_cache_set( 'wc_' . $group . '_cache_prefix', $prefix, $group );
 		}
 
@@ -107,7 +107,7 @@ public static function get_cache_prefix( $group ) {
 	 * @param string $group Group of cache to clear.
 	 */
 	public static function incr_cache_prefix( $group ) {
-		wp_cache_incr( 'wc_' . $group . '_cache_prefix', 1, $group );
+		wp_cache_set( 'wc_' . $group . '_cache_prefix', microtime(), $group );
 	}
 
 	/**

Original file line number	Diff line number	Diff line change
`@@ -94,7 +94,7 @@ public static function get_cache_prefix( $group ) {`
`94`	`94`	`$prefix = wp_cache_get( 'wc_' . $group . '_cache_prefix', $group );`
`95`	`95`
`96`	`96`	`if ( false === $prefix ) {`
`97`		`- $prefix = 1;`
	`97`	`+ $prefix = microtime();`
`98`	`98`	`wp_cache_set( 'wc_' . $group . '_cache_prefix', $prefix, $group );`
`99`	`99`	`}`
`100`	`100`
`@@ -107,7 +107,7 @@ public static function get_cache_prefix( $group ) {`
`107`	`107`	`* @param string $group Group of cache to clear.`
`108`	`108`	`*/`
`109`	`109`	`public static function incr_cache_prefix( $group ) {`
`110`		`- wp_cache_incr( 'wc_' . $group . '_cache_prefix', 1, $group );`
	`110`	`+ wp_cache_set( 'wc_' . $group . '_cache_prefix', microtime(), $group );`
`111`	`111`	`}`
`112`	`112`
`113`	`113`	`/**`