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<?php |
| 2 |
defined( 'ABSPATH' ) || exit; |
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|
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// We need Memcache to continue |
| 5 |
if ( class_exists( 'Memcache' ) ): |
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|
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/** |
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* Copyright (C) 2016 Ryan Boren, Denis de Bernardy, Matt Martz |
| 9 |
*/ |
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|
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if ( ! defined( 'WP_CACHE_KEY_SALT' ) ) { |
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define( 'WP_CACHE_KEY_SALT', DB_NAME ); |
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} |
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|
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function wp_cache_add( $key, $data, $group = '', $expire = 0 ) { |
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|
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global $wp_object_cache; |
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|
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return $wp_object_cache->add( $key, $data, $group, $expire ); |
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} |
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|
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function wp_cache_incr( $key, $n = 1, $group = '' ) { |
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|
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global $wp_object_cache; |
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|
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return $wp_object_cache->incr( $key, $n, $group ); |
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} |
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|
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function wp_cache_decr( $key, $n = 1, $group = '' ) { |
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|
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global $wp_object_cache; |
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|
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return $wp_object_cache->decr( $key, $n, $group ); |
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} |
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|
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function wp_cache_close() { |
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|
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global $wp_object_cache; |
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|
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return $wp_object_cache->close(); |
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} |
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|
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function wp_cache_delete( $key, $group = '' ) { |
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|
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global $wp_object_cache; |
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|
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return $wp_object_cache->delete( $key, $group ); |
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} |
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|
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function wp_cache_flush() { |
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|
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global $wp_object_cache; |
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|
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return $wp_object_cache->flush(); |
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} |
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|
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function wp_cache_get( $key, $group = '', $force = false ) { |
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global $wp_object_cache; |
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|
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return $wp_object_cache->get( $key, $group, $force ); |
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} |
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|
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function wp_cache_init() { |
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|
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global $wp_object_cache; |
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|
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$wp_object_cache = new WP_Object_Cache(); |
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} |
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|
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function wp_cache_replace( $key, $data, $group = '', $expire = 0 ) { |
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|
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global $wp_object_cache; |
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|
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return $wp_object_cache->replace( $key, $data, $group, $expire ); |
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} |
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|
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function wp_cache_set( $key, $data, $group = '', $expire = 0 ) { |
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|
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global $wp_object_cache; |
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|
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if ( defined( 'WP_INSTALLING' ) == false ) { |
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return $wp_object_cache->set( $key, $data, $group, $expire ); |
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} else { |
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return $wp_object_cache->delete( $key, $group ); |
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} |
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} |
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|
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function wp_cache_switch_to_blog( $blog_id ) { |
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|
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global $wp_object_cache; |
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|
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return $wp_object_cache->switch_to_blog( $blog_id ); |
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} |
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|
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function wp_cache_add_global_groups( $groups ) { |
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|
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global $wp_object_cache; |
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|
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$wp_object_cache->add_global_groups( $groups ); |
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} |
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|
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function wp_cache_add_non_persistent_groups( $groups ) { |
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|
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global $wp_object_cache; |
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|
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$wp_object_cache->add_non_persistent_groups( $groups ); |
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} |
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|
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class WP_Object_Cache { |
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var $global_groups = array(); |
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|
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var $no_mc_groups = array(); |
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|
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var $cache = array(); |
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var $mc = array(); |
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var $stats = array(); |
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var $group_ops = array(); |
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|
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var $cache_enabled = true; |
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var $default_expiration = 0; |
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|
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function add( $id, $data, $group = 'default', $expire = 0 ) { |
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|
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$key = $this->key( $id, $group ); |
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|
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if ( is_object( $data ) ) { |
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$data = clone $data; |
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} |
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|
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if ( in_array( $group, $this->no_mc_groups ) ) { |
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$this->cache[ $key ] = $data; |
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return true; |
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} elseif ( isset( $this->cache[ $key ] ) && $this->cache[ $key ] !== false ) { |
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return false; |
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} |
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|
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$mc =& $this->get_mc( $group ); |
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$expire = ($expire == 0) ? $this->default_expiration : $expire; |
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$result = $mc->add( $key, $data, false, $expire ); |
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|
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if ( false !== $result ) { |
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@ ++$this->stats['add']; |
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$this->group_ops[ $group ][] = "add $id"; |
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$this->cache[ $key ] = $data; |
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} |
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|
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return $result; |
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} |
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|
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function add_global_groups( $groups ) { |
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|
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if ( ! is_array( $groups ) ) { |
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$groups = (array) $groups; |
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} |
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|
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$this->global_groups = array_merge( $this->global_groups, $groups ); |
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$this->global_groups = array_unique( $this->global_groups ); |
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} |
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|
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function add_non_persistent_groups( $groups ) { |
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|
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if ( ! is_array( $groups ) ) { |
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$groups = (array) $groups; |
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} |
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|
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$this->no_mc_groups = array_merge( $this->no_mc_groups, $groups ); |
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$this->no_mc_groups = array_unique( $this->no_mc_groups ); |
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} |
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function incr( $id, $n = 1, $group = 'default' ) { |
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|
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$key = $this->key( $id, $group ); |
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$mc =& $this->get_mc( $group ); |
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$this->cache[ $key ] = $mc->increment( $key, $n ); |
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return $this->cache[ $key ]; |
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} |
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|
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function decr( $id, $n = 1, $group = 'default' ) { |
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$key = $this->key( $id, $group ); |
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$mc =& $this->get_mc( $group ); |
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$this->cache[ $key ] = $mc->decrement( $key, $n ); |
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return $this->cache[ $key ]; |
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} |
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|
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function close() { |
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|
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foreach ( $this->mc as $bucket => $mc ) { |
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$mc->close(); |
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} |
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} |
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function delete( $id, $group = 'default' ) { |
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$key = $this->key( $id, $group ); |
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if ( in_array( $group, $this->no_mc_groups ) ) { |
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unset( $this->cache[ $key ] ); |
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return true; |
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} |
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|
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$mc =& $this->get_mc( $group ); |
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|
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$result = $mc->delete( $key ); |
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|
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@ ++$this->stats['delete']; |
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$this->group_ops[ $group ][] = "delete $id"; |
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|
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if ( false !== $result ) { |
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unset( $this->cache[ $key ] ); |
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} |
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|
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return $result; |
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} |
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|
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function flush() { |
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$ret = true; |
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foreach ( array_keys( $this->mc ) as $group ) { |
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$ret &= $this->mc[ $group ]->flush(); |
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} |
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return $ret; |
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} |
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|
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function get( $id, $group = 'default', $force = false ) { |
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$key = $this->key( $id, $group ); |
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$mc =& $this->get_mc( $group ); |
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|
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if ( isset( $this->cache[ $key ] ) && ( ! $force || in_array( $group, $this->no_mc_groups ) ) ) { |
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if ( is_object( $this->cache[ $key ] ) ) { |
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$value = clone $this->cache[ $key ]; |
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} else { |
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$value = $this->cache[ $key ]; |
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} |
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} else if ( in_array( $group, $this->no_mc_groups ) ) { |
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$this->cache[ $key ] = $value = false; |
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} else { |
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$value = $mc->get( $key ); |
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if ( null === $value ) { |
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$value = false; |
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} |
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$this->cache[ $key ] = $value; |
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} |
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|
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@ ++$this->stats['get']; |
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$this->group_ops[ $group ][] = "get $id"; |
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|
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if ( 'checkthedatabaseplease' === $value ) { |
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unset( $this->cache[ $key ] ); |
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$value = false; |
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} |
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|
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return $value; |
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} |
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|
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function get_multi( $groups ) { |
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|
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/* |
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format: $get['group-name'] = array( 'key1', 'key2' ); |
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*/ |
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$return = array(); |
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foreach ( $groups as $group => $ids ) { |
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$mc =& $this->get_mc( $group ); |
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foreach ( $ids as $id ) { |
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$key = $this->key( $id, $group ); |
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if ( isset( $this->cache[ $key ] ) ) { |
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if ( is_object( $this->cache[ $key ] ) ) { |
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$return[ $key ] = clone $this->cache[ $key ]; |
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} else { |
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$return[ $key ] = $this->cache[ $key ]; |
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} |
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continue; |
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} else if ( in_array( $group, $this->no_mc_groups ) ) { |
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$return[ $key ] = false; |
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continue; |
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} else { |
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$return[ $key ] = $mc->get( $key ); |
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} |
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} |
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if ( $to_get ) { |
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$vals = $mc->get_multi( $to_get ); |
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$return = array_merge( $return, $vals ); |
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} |
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} |
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@ ++$this->stats['get_multi']; |
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$this->group_ops[ $group ][] = "get_multi $id"; |
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$this->cache = array_merge( $this->cache, $return ); |
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return $return; |
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} |
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|
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function key( $key, $group ) { |
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|
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if ( empty( $group ) ) { |
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$group = 'default'; |
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} |
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|
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if ( false !== array_search( $group, $this->global_groups ) ) { |
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$prefix = $this->global_prefix; |
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} else { |
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$prefix = $this->blog_prefix; |
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} |
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|
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return preg_replace( '/\s+/', '', WP_CACHE_KEY_SALT . "$prefix$group:$key" ); |
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} |
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|
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function replace( $id, $data, $group = 'default', $expire = 0 ) { |
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|
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$key = $this->key( $id, $group ); |
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$expire = ($expire == 0) ? $this->default_expiration : $expire; |
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$mc =& $this->get_mc( $group ); |
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|
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if ( is_object( $data ) ) { |
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$data = clone $data; |
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} |
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|
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$result = $mc->replace( $key, $data, false, $expire ); |
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if ( false !== $result ) { |
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$this->cache[ $key ] = $data; |
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} |
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return $result; |
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} |
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|
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function set( $id, $data, $group = 'default', $expire = 0 ) { |
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|
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$key = $this->key( $id, $group ); |
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if ( isset( $this->cache[ $key ] ) && ('checkthedatabaseplease' === $this->cache[ $key ]) ) { |
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return false; |
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} |
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|
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if ( is_object( $data ) ) { |
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$data = clone $data; |
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} |
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|
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$this->cache[ $key ] = $data; |
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|
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if ( in_array( $group, $this->no_mc_groups ) ) { |
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return true; |
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} |
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|
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$expire = ($expire == 0) ? $this->default_expiration : $expire; |
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$mc =& $this->get_mc( $group ); |
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$result = $mc->set( $key, $data, false, $expire ); |
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|
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return $result; |
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} |
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|
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function switch_to_blog( $blog_id ) { |
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|
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global $table_prefix; |
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|
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$blog_id = (int) $blog_id; |
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$this->blog_prefix = ( is_multisite() ? $blog_id : $table_prefix ) . ':'; |
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} |
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|
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function colorize_debug_line( $line ) { |
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|
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$colors = array( |
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'get' => 'green', |
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'set' => 'purple', |
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'add' => 'blue', |
| 362 |
'delete' => 'red', |
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); |
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|
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$cmd = substr( $line, 0, strpos( $line, ' ' ) ); |
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|
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$cmd2 = "<span style='color:{$colors[$cmd]}'>$cmd</span>"; |
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|
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return $cmd2 . substr( $line, strlen( $cmd ) ) . "\n"; |
| 370 |
} |
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|
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function stats() { |
| 373 |
|
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echo "<p>\n"; |
| 375 |
foreach ( $this->stats as $stat => $n ) { |
| 376 |
echo "<strong>$stat</strong> $n"; |
| 377 |
echo "<br/>\n"; |
| 378 |
} |
| 379 |
echo "</p>\n"; |
| 380 |
echo '<h3>Memcached:</h3>'; |
| 381 |
foreach ( $this->group_ops as $group => $ops ) { |
| 382 |
if ( ! isset( $_GET['debug_queries'] ) && 500 < count( $ops ) ) { |
| 383 |
$ops = array_slice( $ops, 0, 500 ); |
| 384 |
echo "<big>Too many to show! <a href='" . add_query_arg( 'debug_queries', 'true' ) . "'>Show them anyway</a>.</big>\n"; |
| 385 |
} |
| 386 |
echo "<h4>$group commands</h4>"; |
| 387 |
echo "<pre>\n"; |
| 388 |
$lines = array(); |
| 389 |
foreach ( $ops as $op ) { |
| 390 |
$lines[] = $this->colorize_debug_line( $op ); |
| 391 |
} |
| 392 |
print_r( $lines ); |
| 393 |
echo "</pre>\n"; |
| 394 |
} |
| 395 |
} |
| 396 |
|
| 397 |
function &get_mc( $group ) { |
| 398 |
|
| 399 |
if ( isset( $this->mc[ $group ] ) ) { |
| 400 |
return $this->mc[ $group ]; |
| 401 |
} |
| 402 |
return $this->mc['default']; |
| 403 |
} |
| 404 |
|
| 405 |
function failure_callback( $host, $port ) { |
| 406 |
|
| 407 |
//error_log("Connection failure for $host:$port\n", 3, '/tmp/memcached.txt'); |
| 408 |
} |
| 409 |
|
| 410 |
function __construct() { |
| 411 |
|
| 412 |
global $memcached_servers; |
| 413 |
|
| 414 |
if ( isset( $memcached_servers ) ) { |
| 415 |
$buckets = $memcached_servers; |
| 416 |
} else { |
| 417 |
$buckets = array( '127.0.0.1:11211' ); |
| 418 |
} |
| 419 |
|
| 420 |
reset( $buckets ); |
| 421 |
if ( is_int( key( $buckets ) ) ) { |
| 422 |
$buckets = array( 'default' => $buckets ); |
| 423 |
} |
| 424 |
|
| 425 |
foreach ( $buckets as $bucket => $servers ) { |
| 426 |
$this->mc[ $bucket ] = new Memcache(); |
| 427 |
foreach ( $servers as $server ) { |
| 428 |
if ( 'unix://' == substr( $server, 0, 7 ) ) { |
| 429 |
$node = $server; |
| 430 |
$port = 0; |
| 431 |
} else { |
| 432 |
list ( $node, $port ) = explode( ':', $server ); |
| 433 |
if ( ! $port ) { |
| 434 |
$port = ini_get( 'memcache.default_port' ); |
| 435 |
} |
| 436 |
$port = intval( $port ); |
| 437 |
if ( ! $port ) { |
| 438 |
$port = 11211; |
| 439 |
} |
| 440 |
} |
| 441 |
$this->mc[ $bucket ]->addServer( $node, $port, true, 1, 1, 15, true, array( $this, 'failure_callback' ) ); |
| 442 |
$this->mc[ $bucket ]->setCompressThreshold( 20000, 0.2 ); |
| 443 |
} |
| 444 |
} |
| 445 |
|
| 446 |
global $blog_id, $table_prefix; |
| 447 |
$this->global_prefix = ''; |
| 448 |
$this->blog_prefix = ''; |
| 449 |
if ( function_exists( 'is_multisite' ) ) { |
| 450 |
$this->global_prefix = ( is_multisite() || defined( 'CUSTOM_USER_TABLE' ) && defined( 'CUSTOM_USER_META_TABLE' ) ) ? '' : $table_prefix; |
| 451 |
$this->blog_prefix = ( is_multisite() ? $blog_id : $table_prefix ) . ':'; |
| 452 |
} |
| 453 |
|
| 454 |
$this->cache_hits =& $this->stats['get']; |
| 455 |
$this->cache_misses =& $this->stats['add']; |
| 456 |
} |
| 457 |
} |
| 458 |
endif; |
| 459 |
?> |
| 460 |
|
