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authorLuke Shumaker <lukeshu@sbcglobal.net>2016-05-01 15:12:12 -0400
committerLuke Shumaker <lukeshu@sbcglobal.net>2016-05-01 15:12:12 -0400
commitc9aa36da061816dee256a979c2ff8d2ee41824d9 (patch)
tree29f7002b80ee984b488bd047dbbd80b36bf892e9 /includes/cache/ProcessCacheLRU.php
parentb4274e0e33eafb5e9ead9d949ebf031a9fb8363b (diff)
parentd1ba966140d7a60cd5ae4e8667ceb27c1a138592 (diff)
Merge branch 'archwiki'
# Conflicts: # skins/ArchLinux.php # skins/ArchLinux/archlogo.gif
Diffstat (limited to 'includes/cache/ProcessCacheLRU.php')
-rw-r--r--includes/cache/ProcessCacheLRU.php131
1 files changed, 0 insertions, 131 deletions
diff --git a/includes/cache/ProcessCacheLRU.php b/includes/cache/ProcessCacheLRU.php
deleted file mode 100644
index 76c76f37..00000000
--- a/includes/cache/ProcessCacheLRU.php
+++ /dev/null
@@ -1,131 +0,0 @@
-<?php
-/**
- * Per-process memory cache for storing items.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License along
- * with this program; if not, write to the Free Software Foundation, Inc.,
- * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
- * http://www.gnu.org/copyleft/gpl.html
- *
- * @file
- * @ingroup Cache
- */
-
-/**
- * Handles per process caching of items
- * @ingroup Cache
- */
-class ProcessCacheLRU {
- /** @var Array */
- protected $cache = array(); // (key => prop => value)
- /** @var Array */
- protected $cacheTimes = array(); // (key => prop => UNIX timestamp)
-
- protected $maxCacheKeys; // integer; max entries
-
- /**
- * @param $maxKeys integer Maximum number of entries allowed (min 1).
- * @throws MWException When $maxCacheKeys is not an int or =< 0.
- */
- public function __construct( $maxKeys ) {
- if ( !is_int( $maxKeys ) || $maxKeys < 1 ) {
- throw new MWException( __METHOD__ . " must be given an integer and >= 1" );
- }
- $this->maxCacheKeys = $maxKeys;
- }
-
- /**
- * Set a property field for a cache entry.
- * This will prune the cache if it gets too large based on LRU.
- * If the item is already set, it will be pushed to the top of the cache.
- *
- * @param $key string
- * @param $prop string
- * @param $value mixed
- * @return void
- */
- public function set( $key, $prop, $value ) {
- if ( isset( $this->cache[$key] ) ) {
- $this->ping( $key ); // push to top
- } elseif ( count( $this->cache ) >= $this->maxCacheKeys ) {
- reset( $this->cache );
- $evictKey = key( $this->cache );
- unset( $this->cache[$evictKey] );
- unset( $this->cacheTimes[$evictKey] );
- }
- $this->cache[$key][$prop] = $value;
- $this->cacheTimes[$key][$prop] = time();
- }
-
- /**
- * Check if a property field exists for a cache entry.
- *
- * @param $key string
- * @param $prop string
- * @param $maxAge integer Ignore items older than this many seconds (since 1.21)
- * @return bool
- */
- public function has( $key, $prop, $maxAge = 0 ) {
- if ( isset( $this->cache[$key][$prop] ) ) {
- return ( $maxAge <= 0 || ( time() - $this->cacheTimes[$key][$prop] ) <= $maxAge );
- }
- return false;
- }
-
- /**
- * Get a property field for a cache entry.
- * This returns null if the property is not set.
- * If the item is already set, it will be pushed to the top of the cache.
- *
- * @param $key string
- * @param $prop string
- * @return mixed
- */
- public function get( $key, $prop ) {
- if ( isset( $this->cache[$key][$prop] ) ) {
- $this->ping( $key ); // push to top
- return $this->cache[$key][$prop];
- } else {
- return null;
- }
- }
-
- /**
- * Clear one or several cache entries, or all cache entries
- *
- * @param $keys string|Array
- * @return void
- */
- public function clear( $keys = null ) {
- if ( $keys === null ) {
- $this->cache = array();
- $this->cacheTimes = array();
- } else {
- foreach ( (array)$keys as $key ) {
- unset( $this->cache[$key] );
- unset( $this->cacheTimes[$key] );
- }
- }
- }
-
- /**
- * Push an entry to the top of the cache
- *
- * @param $key string
- */
- protected function ping( $key ) {
- $item = $this->cache[$key];
- unset( $this->cache[$key] );
- $this->cache[$key] = $item;
- }
-}