Add more ProcessCacheLRU comments

Change-Id: I5b59dd065dc387a6c7f9cae42ea5244247448650

diff --git a/includes/libs/ProcessCacheLRU.php b/includes/libs/ProcessCacheLRU.php
index 03e23ed..b374259 100644 (file)
--- a/includes/libs/ProcessCacheLRU.php
+++ b/includes/libs/ProcessCacheLRU.php
@@ -23,14 +23,17 @@
 use Wikimedia\Assert\Assert;
 
 /**
- * Handles per process caching of items
+ * Class for process caching individual properties of expiring items
+ *
+ * When the key for an entire item is deleted, all properties for it are deleted
+ *
  * @ingroup Cache
  */
 class ProcessCacheLRU {
-       /** @var Array */
+       /** @var array */
        protected $cache = []; // (key => prop => value)
 
-       /** @var Array */
+       /** @var array */
        protected $cacheTimes = []; // (key => prop => UNIX timestamp)
 
        protected $maxCacheKeys; // integer; max entries