| 1 |
<?php |
| 2 |
/** |
| 3 |
* XSPEED_OBJECT_CACHE_DROPIN |
| 4 |
* |
| 5 |
* xSpeed's self-contained persistent object cache drop-in. |
| 6 |
* |
| 7 |
* Supports Redis (phpredis extension, with a graceful no-op fall-through when |
| 8 |
* absent) and Memcached. Implements the full WordPress object-cache API as a |
| 9 |
* global WP_Object_Cache class + wp_cache_* functions. |
| 10 |
* |
| 11 |
* Design principles: |
| 12 |
* - NEVER fatal the site. If the backend can't be reached, we degrade to a |
| 13 |
* non-persistent in-request array cache. A misconfigured Redis must never |
| 14 |
* take a site down — that's why connection_timeout defaults low. |
| 15 |
* - Read config from constants written by xSpeed into wp-config.php |
| 16 |
* (XSPEED_OC_*), falling back to the widely-used WP_REDIS_* conventions so |
| 17 |
* existing setups keep working. |
| 18 |
* - WP-compliant: groups, global groups, multisite blog-id prefixing, |
| 19 |
* add/get/set/delete/incr/decr/replace, flush, get_multiple, add_multiple. |
| 20 |
* |
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* This file is copied to wp-content/object-cache.php by xSpeed when the user |
| 22 |
* clicks "Enable Object Cache". It is loaded by WordPress very early |
| 23 |
* (wp-settings.php), before most of core — so it must be self-sufficient. |
| 24 |
* |
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* @package XSpeed |
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*/ |
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|
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defined( 'ABSPATH' ) || exit; |
| 29 |
|
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// ----------------------------------------------------------------------------- |
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// Config resolution. Prefer xSpeed's own XSPEED_OC_* constants; fall back to the |
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// de-facto WP_REDIS_* / $memcached_servers conventions so we interoperate. |
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// ----------------------------------------------------------------------------- |
| 34 |
if ( ! function_exists( 'xspeed_oc_config' ) ) { |
| 35 |
/** |
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* Resolve a single config value from constants with sane defaults. |
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*/ |
| 38 |
function xspeed_oc_config( $key, $default ) { |
| 39 |
$map = array( |
| 40 |
'backend' => array( 'XSPEED_OC_BACKEND' ), |
| 41 |
'host' => array( 'XSPEED_OC_HOST', 'WP_REDIS_HOST' ), |
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'port' => array( 'XSPEED_OC_PORT', 'WP_REDIS_PORT' ), |
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'password' => array( 'XSPEED_OC_PASSWORD', 'WP_REDIS_PASSWORD' ), |
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'database' => array( 'XSPEED_OC_DATABASE', 'WP_REDIS_DATABASE' ), |
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'timeout' => array( 'XSPEED_OC_TIMEOUT', 'WP_REDIS_TIMEOUT' ), |
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'salt' => array( 'XSPEED_OC_SALT', 'WP_CACHE_KEY_SALT' ), |
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'persist' => array( 'XSPEED_OC_PERSISTENT', 'WP_REDIS_PERSISTENT' ), |
| 48 |
); |
| 49 |
if ( isset( $map[ $key ] ) ) { |
| 50 |
foreach ( $map[ $key ] as $const ) { |
| 51 |
if ( defined( $const ) ) { |
| 52 |
return constant( $const ); |
| 53 |
} |
| 54 |
} |
| 55 |
} |
| 56 |
return $default; |
| 57 |
} |
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} |
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|
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// ----------------------------------------------------------------------------- |
| 61 |
// WordPress object-cache API surface. Thin wrappers over the global instance. |
| 62 |
// ----------------------------------------------------------------------------- |
| 63 |
if ( ! function_exists( 'wp_cache_init' ) ) { |
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|
| 65 |
function wp_cache_init() { |
| 66 |
$GLOBALS['wp_object_cache'] = new XSpeed_Object_Cache(); |
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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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return $GLOBALS['wp_object_cache']->add( $key, $data, $group, (int) $expire ); |
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} |
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|
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function wp_cache_add_multiple( array $data, $group = '', $expire = 0 ) { |
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$out = array(); |
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foreach ( $data as $key => $value ) { |
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$out[ $key ] = wp_cache_add( $key, $value, $group, $expire ); |
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} |
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return $out; |
| 79 |
} |
| 80 |
|
| 81 |
function wp_cache_replace( $key, $data, $group = '', $expire = 0 ) { |
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return $GLOBALS['wp_object_cache']->replace( $key, $data, $group, (int) $expire ); |
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} |
| 84 |
|
| 85 |
function wp_cache_set( $key, $data, $group = '', $expire = 0 ) { |
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return $GLOBALS['wp_object_cache']->set( $key, $data, $group, (int) $expire ); |
| 87 |
} |
| 88 |
|
| 89 |
function wp_cache_set_multiple( array $data, $group = '', $expire = 0 ) { |
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$out = array(); |
| 91 |
foreach ( $data as $key => $value ) { |
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$out[ $key ] = wp_cache_set( $key, $value, $group, $expire ); |
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} |
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return $out; |
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} |
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|
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function wp_cache_get( $key, $group = '', $force = false, &$found = null ) { |
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return $GLOBALS['wp_object_cache']->get( $key, $group, $force, $found ); |
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} |
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|
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function wp_cache_get_multiple( $keys, $group = '', $force = false ) { |
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return $GLOBALS['wp_object_cache']->get_multiple( $keys, $group, $force ); |
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} |
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|
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function wp_cache_delete( $key, $group = '' ) { |
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return $GLOBALS['wp_object_cache']->delete( $key, $group ); |
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} |
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|
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function wp_cache_delete_multiple( array $keys, $group = '' ) { |
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$out = array(); |
| 111 |
foreach ( $keys as $key ) { |
| 112 |
$out[ $key ] = wp_cache_delete( $key, $group ); |
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} |
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return $out; |
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} |
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|
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function wp_cache_incr( $key, $offset = 1, $group = '' ) { |
| 118 |
return $GLOBALS['wp_object_cache']->incr( $key, (int) $offset, $group ); |
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} |
| 120 |
|
| 121 |
function wp_cache_decr( $key, $offset = 1, $group = '' ) { |
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return $GLOBALS['wp_object_cache']->decr( $key, (int) $offset, $group ); |
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} |
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|
| 125 |
function wp_cache_flush() { |
| 126 |
return $GLOBALS['wp_object_cache']->flush(); |
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} |
| 128 |
|
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function wp_cache_flush_runtime() { |
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return $GLOBALS['wp_object_cache']->flush_runtime(); |
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} |
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|
| 133 |
function wp_cache_flush_group( $group ) { |
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return $GLOBALS['wp_object_cache']->flush_group( $group ); |
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} |
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|
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function wp_cache_supports( $feature ) { |
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return in_array( $feature, array( 'get_multiple', 'set_multiple', 'add_multiple', 'delete_multiple', 'flush_runtime', 'flush_group' ), true ); |
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} |
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|
| 141 |
function wp_cache_close() { |
| 142 |
return $GLOBALS['wp_object_cache']->close(); |
| 143 |
} |
| 144 |
|
| 145 |
function wp_cache_add_global_groups( $groups ) { |
| 146 |
$GLOBALS['wp_object_cache']->add_global_groups( $groups ); |
| 147 |
} |
| 148 |
|
| 149 |
function wp_cache_add_non_persistent_groups( $groups ) { |
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$GLOBALS['wp_object_cache']->add_non_persistent_groups( $groups ); |
| 151 |
} |
| 152 |
|
| 153 |
function wp_cache_switch_to_blog( $blog_id ) { |
| 154 |
$GLOBALS['wp_object_cache']->switch_to_blog( (int) $blog_id ); |
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} |
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|
| 157 |
function wp_cache_reset() { |
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// Deprecated in core; kept for back-compat. |
| 159 |
return $GLOBALS['wp_object_cache']->flush_runtime(); |
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} |
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} |
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|
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// ----------------------------------------------------------------------------- |
| 164 |
// The cache implementation. |
| 165 |
// ----------------------------------------------------------------------------- |
| 166 |
if ( ! class_exists( 'XSpeed_Object_Cache' ) ) { |
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|
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class XSpeed_Object_Cache { |
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|
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/** @var array In-request cache (always populated; also the fallback store). */ |
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private $cache = array(); |
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|
| 173 |
/** @var \Redis|\Memcached|null Persistent backend handle, or null when degraded. */ |
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private $conn = null; |
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|
| 176 |
/** @var string redis|memcached */ |
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private $backend = 'redis'; |
| 178 |
|
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/** @var string Concrete client driving a Redis backend: phpredis|builtin. */ |
| 180 |
private $client = 'phpredis'; |
| 181 |
|
| 182 |
/** @var bool True once a persistent backend is connected. */ |
| 183 |
private $persistent = false; |
| 184 |
|
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/** |
| 186 |
* @var bool True when the drop-in is active but could NOT connect a |
| 187 |
* persistent backend, so it's silently serving a non-persistent |
| 188 |
* in-request cache. Surfaced so the dashboard can report "degraded" |
| 189 |
* instead of implying object caching is healthy. (FBS-82210) |
| 190 |
*/ |
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public $degraded = false; |
| 192 |
|
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/** @var string Key salt / prefix. */ |
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private $salt = ''; |
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|
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/** @var int Current blog id (multisite prefixing). */ |
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private $blog_prefix = 0; |
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|
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/** @var bool */ |
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private $multisite = false; |
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|
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/** @var array<string,bool> Groups shared across the whole network. */ |
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private $global_groups = array(); |
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|
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/** @var array<string,bool> Groups that must never hit the persistent store. */ |
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private $non_persistent_groups = array(); |
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|
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/** @var int Cache hits this request. */ |
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public $cache_hits = 0; |
| 210 |
|
| 211 |
/** @var int Cache misses this request. */ |
| 212 |
public $cache_misses = 0; |
| 213 |
|
| 214 |
public function __construct() { |
| 215 |
$this->multisite = function_exists( 'is_multisite' ) && is_multisite(); |
| 216 |
$this->blog_prefix = $this->multisite ? (int) get_current_blog_id() : 0; |
| 217 |
$this->salt = (string) xspeed_oc_config( 'salt', '' ); |
| 218 |
$this->backend = strtolower( (string) xspeed_oc_config( 'backend', 'redis' ) ); |
| 219 |
|
| 220 |
$this->connect(); |
| 221 |
} |
| 222 |
|
| 223 |
// --- Connection ----------------------------------------------------- |
| 224 |
|
| 225 |
private function connect() { |
| 226 |
$timeout = (float) xspeed_oc_config( 'timeout', 1 ); |
| 227 |
try { |
| 228 |
if ( 'memcached' === $this->backend ) { |
| 229 |
$host = (string) xspeed_oc_config( 'host', '127.0.0.1' ); |
| 230 |
$port = (int) xspeed_oc_config( 'port', 11211 ); |
| 231 |
|
| 232 |
if ( class_exists( 'Memcached' ) ) { |
| 233 |
// ext/memcached (preferred). |
| 234 |
$this->client = 'ext-memcached'; |
| 235 |
$mc = new Memcached(); |
| 236 |
$mc->addServer( $host, $port ); |
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$mc->setOption( Memcached::OPT_CONNECT_TIMEOUT, (int) ( $timeout * 1000 ) ); |
| 238 |
$stats = @$mc->getStats(); |
| 239 |
if ( is_array( $stats ) && ! empty( $stats ) ) { |
| 240 |
$this->conn = $mc; |
| 241 |
$this->persistent = true; |
| 242 |
} |
| 243 |
} elseif ( $this->load_builtin_memcached() ) { |
| 244 |
// xSpeed's own pure-PHP Memcached client. |
| 245 |
$this->client = 'builtin-memcached'; |
| 246 |
$mc = new \XSpeed\Memcached_Client( $host, $port, $timeout ); |
| 247 |
if ( $mc->connect() && false !== $mc->version() ) { |
| 248 |
$this->conn = $mc; |
| 249 |
$this->persistent = true; |
| 250 |
} |
| 251 |
} |
| 252 |
} else { |
| 253 |
$this->backend = 'redis'; |
| 254 |
$host = (string) xspeed_oc_config( 'host', '127.0.0.1' ); |
| 255 |
$port = (int) xspeed_oc_config( 'port', 6379 ); |
| 256 |
$pass = (string) xspeed_oc_config( 'password', '' ); |
| 257 |
$db = (int) xspeed_oc_config( 'database', 0 ); |
| 258 |
$persist = (bool) xspeed_oc_config( 'persist', false ); |
| 259 |
|
| 260 |
if ( class_exists( 'Redis' ) ) { |
| 261 |
// phpredis extension (preferred). |
| 262 |
$this->client = 'phpredis'; |
| 263 |
$redis = new Redis(); |
| 264 |
$ok = $persist |
| 265 |
? @$redis->pconnect( $host, $port, $timeout ) |
| 266 |
: @$redis->connect( $host, $port, $timeout ); |
| 267 |
if ( $ok ) { |
| 268 |
if ( '' !== $pass ) { |
| 269 |
@$redis->auth( $pass ); |
| 270 |
} |
| 271 |
if ( $db > 0 ) { |
| 272 |
@$redis->select( $db ); |
| 273 |
} |
| 274 |
if ( '+PONG' === @$redis->ping() || true === @$redis->ping() ) { |
| 275 |
$this->conn = $redis; |
| 276 |
$this->persistent = true; |
| 277 |
} |
| 278 |
} |
| 279 |
} elseif ( $this->load_builtin_client() ) { |
| 280 |
// xSpeed's own pure-PHP client (no extension, no library). |
| 281 |
$this->client = 'builtin'; |
| 282 |
$rc = new \XSpeed\Redis_Client( $host, $port, (float) $timeout, $persist ); |
| 283 |
if ( $rc->connect() ) { |
| 284 |
if ( '' !== $pass ) { |
| 285 |
$rc->auth( $pass ); |
| 286 |
} |
| 287 |
if ( $db > 0 ) { |
| 288 |
$rc->select( $db ); |
| 289 |
} |
| 290 |
$pong = $rc->ping(); |
| 291 |
if ( is_string( $pong ) && false !== stripos( $pong, 'PONG' ) ) { |
| 292 |
$this->conn = $rc; |
| 293 |
$this->persistent = true; |
| 294 |
} |
| 295 |
} |
| 296 |
} |
| 297 |
} |
| 298 |
} catch ( \Throwable $e ) { |
| 299 |
// Any failure → stay in non-persistent mode. Never fatal. |
| 300 |
$this->conn = null; |
| 301 |
$this->persistent = false; |
| 302 |
} |
| 303 |
|
| 304 |
// The drop-in is installed (we're running), so if we didn't manage |
| 305 |
// to connect a persistent backend, object caching is effectively |
| 306 |
// doing nothing — writes succeed but evaporate at request end. |
| 307 |
// Flag it so detect()/the dashboard can report "degraded" instead |
| 308 |
// of a false-healthy state, and log once per request so the failure |
| 309 |
// is diagnosable rather than silent. (FBS-82210) |
| 310 |
if ( ! $this->persistent ) { |
| 311 |
$this->degraded = true; |
| 312 |
$should_log = function_exists( 'apply_filters' ) |
| 313 |
? apply_filters( 'xspeed_object_cache_log_degraded', true ) |
| 314 |
: true; |
| 315 |
if ( $should_log ) { |
| 316 |
error_log( sprintf( |
| 317 |
'[xSpeed] Object cache drop-in active but NOT persisting: could not connect a %s backend (client: %s). Serving a non-persistent in-request cache. Check the backend host/port and that the extension OR xSpeed\'s bundled client is loadable.', |
| 318 |
$this->backend, |
| 319 |
$this->client |
| 320 |
) ); |
| 321 |
} |
| 322 |
} |
| 323 |
} |
| 324 |
|
| 325 |
/** |
| 326 |
* Whether a persistent backend is actually connected. False means the |
| 327 |
* drop-in is degraded (non-persistent) — see $this->degraded. |
| 328 |
*/ |
| 329 |
public function is_persistent() { |
| 330 |
return (bool) $this->persistent; |
| 331 |
} |
| 332 |
|
| 333 |
/** Concrete client in use: phpredis|builtin|ext-memcached|builtin-memcached|''. */ |
| 334 |
public function client_name() { |
| 335 |
return $this->persistent ? (string) $this->client : ''; |
| 336 |
} |
| 337 |
|
| 338 |
/** |
| 339 |
* Load xSpeed's own Redis_Client on demand. The drop-in runs before |
| 340 |
* the plugin's autoloader, so we require the class file directly from |
| 341 |
* the plugin. Returns true once \XSpeed\Redis_Client is available. |
| 342 |
*/ |
| 343 |
private function load_builtin_client() { |
| 344 |
return $this->load_builtin( '\\XSpeed\\Redis_Client', 'class-redis-client.php' ); |
| 345 |
} |
| 346 |
|
| 347 |
/** |
| 348 |
* Robustly locate + require one of xSpeed's bundled, extension-free |
| 349 |
* clients. This is the linchpin of the "no extension to install" |
| 350 |
* promise: on a host without phpredis/ext-memcached, the drop-in MUST |
| 351 |
* be able to load this file or it silently degrades to a non-persistent |
| 352 |
* cache (writes return true but never reach the backend). (FBS-82210) |
| 353 |
* |
| 354 |
* The original implementation only tried WP_PLUGIN_DIR — which fails |
| 355 |
* when the plugin dir is symlinked, when WP_PLUGIN_DIR points somewhere |
| 356 |
* unexpected, or when the constant isn't defined yet at drop-in load |
| 357 |
* time. We add a __DIR__-relative candidate: the drop-in lives in |
| 358 |
* wp-content/, and the plugin sits at wp-content/plugins/xspeed/includes/, |
| 359 |
* so we can resolve the client relative to our own location regardless |
| 360 |
* of how the plugin is mounted. realpath() also resolves symlinks. |
| 361 |
* |
| 362 |
* @param string $class Fully-qualified class name to check for. |
| 363 |
* @param string $filename Client file under the plugin's includes/ dir. |
| 364 |
* @return bool True once the class is available. |
| 365 |
*/ |
| 366 |
private function load_builtin( $class, $filename ) { |
| 367 |
if ( class_exists( $class ) ) { |
| 368 |
return true; |
| 369 |
} |
| 370 |
|
| 371 |
$candidates = array(); |
| 372 |
if ( defined( 'WP_PLUGIN_DIR' ) ) { |
| 373 |
$candidates[] = WP_PLUGIN_DIR . '/xspeed/includes/' . $filename; |
| 374 |
} |
| 375 |
if ( defined( 'WP_CONTENT_DIR' ) ) { |
| 376 |
$candidates[] = WP_CONTENT_DIR . '/plugins/xspeed/includes/' . $filename; |
| 377 |
$candidates[] = WP_CONTENT_DIR . '/mu-plugins/xspeed/includes/' . $filename; |
| 378 |
} |
| 379 |
// __DIR__-relative: this file is wp-content/object-cache.php, so the |
| 380 |
// plugin is a sibling under plugins/xspeed/ — survives symlinks and |
| 381 |
// odd WP_PLUGIN_DIR values the candidates above don't. |
| 382 |
$candidates[] = __DIR__ . '/plugins/xspeed/includes/' . $filename; |
| 383 |
|
| 384 |
foreach ( $candidates as $path ) { |
| 385 |
if ( ! $path ) { |
| 386 |
continue; |
| 387 |
} |
| 388 |
$real = @realpath( $path ); |
| 389 |
$path = false !== $real ? $real : $path; |
| 390 |
if ( file_exists( $path ) ) { |
| 391 |
require_once $path; |
| 392 |
if ( class_exists( $class ) ) { |
| 393 |
return true; |
| 394 |
} |
| 395 |
} |
| 396 |
} |
| 397 |
|
| 398 |
return class_exists( $class ); |
| 399 |
} |
| 400 |
|
| 401 |
// --- Key helpers ---------------------------------------------------- |
| 402 |
|
| 403 |
private function group( $group ) { |
| 404 |
return '' === (string) $group ? 'default' : (string) $group; |
| 405 |
} |
| 406 |
|
| 407 |
private function full_key( $key, $group ) { |
| 408 |
$group = $this->group( $group ); |
| 409 |
$prefix = isset( $this->global_groups[ $group ] ) ? 0 : $this->blog_prefix; |
| 410 |
return $this->salt . ':' . $prefix . ':' . $group . ':' . $key; |
| 411 |
} |
| 412 |
|
| 413 |
private function is_persistent_group( $group ) { |
| 414 |
return $this->persistent && ! isset( $this->non_persistent_groups[ $this->group( $group ) ] ); |
| 415 |
} |
| 416 |
|
| 417 |
// --- Core ops ------------------------------------------------------- |
| 418 |
|
| 419 |
public function add( $key, $data, $group = 'default', $expire = 0 ) { |
| 420 |
if ( wp_suspend_cache_addition() ) { |
| 421 |
return false; |
| 422 |
} |
| 423 |
$id = $this->full_key( $key, $group ); |
| 424 |
// Present in THIS request's runtime cache → already added. |
| 425 |
if ( isset( $this->cache[ $id ] ) ) { |
| 426 |
return false; |
| 427 |
} |
| 428 |
|
| 429 |
// For persistent groups, add() must fail if the key exists in the |
| 430 |
// BACKEND too — not just this request's runtime array. Use the |
| 431 |
// backend's atomic add (Redis SET NX / memcached add) so two |
| 432 |
// processes racing to add the same key behave correctly and the |
| 433 |
// existing value is never clobbered. Falling back to the runtime |
| 434 |
// check alone (the old behaviour) let process B overwrite a key |
| 435 |
// process A had already stored. (FBS-82111 Bug 2) |
| 436 |
if ( $this->is_persistent_group( $group ) && $this->conn ) { |
| 437 |
try { |
| 438 |
if ( is_object( $data ) ) { |
| 439 |
$data = clone $data; |
| 440 |
} |
| 441 |
$payload = maybe_serialize( $data ); |
| 442 |
$stored = $this->conn->add( $id, $payload, (int) $expire ); |
| 443 |
if ( ! $stored ) { |
| 444 |
return false; // key already exists in the backend. |
| 445 |
} |
| 446 |
$this->cache[ $id ] = $data; |
| 447 |
return true; |
| 448 |
} catch ( \Throwable $e ) { |
| 449 |
// Backend hiccup — fall through to the runtime-only path so |
| 450 |
// add() still works against the in-request array cache. |
| 451 |
} |
| 452 |
} |
| 453 |
|
| 454 |
return $this->set( $key, $data, $group, $expire ); |
| 455 |
} |
| 456 |
|
| 457 |
public function replace( $key, $data, $group = 'default', $expire = 0 ) { |
| 458 |
$id = $this->full_key( $key, $group ); |
| 459 |
if ( ! isset( $this->cache[ $id ] ) && false === $this->get( $key, $group ) ) { |
| 460 |
return false; |
| 461 |
} |
| 462 |
return $this->set( $key, $data, $group, $expire ); |
| 463 |
} |
| 464 |
|
| 465 |
public function set( $key, $data, $group = 'default', $expire = 0 ) { |
| 466 |
$id = $this->full_key( $key, $group ); |
| 467 |
if ( is_object( $data ) ) { |
| 468 |
$data = clone $data; |
| 469 |
} |
| 470 |
$this->cache[ $id ] = $data; |
| 471 |
|
| 472 |
if ( $this->is_persistent_group( $group ) ) { |
| 473 |
try { |
| 474 |
$payload = maybe_serialize( $data ); |
| 475 |
if ( 'redis' === $this->backend ) { |
| 476 |
return $expire > 0 |
| 477 |
? (bool) $this->conn->setex( $id, (int) $expire, $payload ) |
| 478 |
: (bool) $this->conn->set( $id, $payload ); |
| 479 |
} |
| 480 |
return (bool) $this->conn->set( $id, $payload, (int) $expire ); |
| 481 |
} catch ( \Throwable $e ) { |
| 482 |
return true; // runtime cache still set |
| 483 |
} |
| 484 |
} |
| 485 |
return true; |
| 486 |
} |
| 487 |
|
| 488 |
public function get( $key, $group = 'default', $force = false, &$found = null ) { |
| 489 |
$id = $this->full_key( $key, $group ); |
| 490 |
|
| 491 |
if ( ! $force && isset( $this->cache[ $id ] ) ) { |
| 492 |
$found = true; |
| 493 |
++$this->cache_hits; |
| 494 |
$val = $this->cache[ $id ]; |
| 495 |
return is_object( $val ) ? clone $val : $val; |
| 496 |
} |
| 497 |
|
| 498 |
if ( $this->is_persistent_group( $group ) ) { |
| 499 |
try { |
| 500 |
$raw = $this->conn->get( $id ); |
| 501 |
if ( false !== $raw && null !== $raw ) { |
| 502 |
$val = maybe_unserialize( $raw ); |
| 503 |
$this->cache[ $id ] = $val; |
| 504 |
$found = true; |
| 505 |
++$this->cache_hits; |
| 506 |
return is_object( $val ) ? clone $val : $val; |
| 507 |
} |
| 508 |
} catch ( \Throwable $e ) { |
| 509 |
// fall through to miss |
| 510 |
} |
| 511 |
} |
| 512 |
|
| 513 |
$found = false; |
| 514 |
++$this->cache_misses; |
| 515 |
return false; |
| 516 |
} |
| 517 |
|
| 518 |
public function get_multiple( $keys, $group = 'default', $force = false ) { |
| 519 |
$out = array(); |
| 520 |
foreach ( (array) $keys as $key ) { |
| 521 |
$out[ $key ] = $this->get( $key, $group, $force ); |
| 522 |
} |
| 523 |
return $out; |
| 524 |
} |
| 525 |
|
| 526 |
public function delete( $key, $group = 'default' ) { |
| 527 |
$id = $this->full_key( $key, $group ); |
| 528 |
unset( $this->cache[ $id ] ); |
| 529 |
if ( $this->is_persistent_group( $group ) ) { |
| 530 |
try { |
| 531 |
return (bool) $this->backend_delete( $id ); |
| 532 |
} catch ( \Throwable $e ) { |
| 533 |
return true; |
| 534 |
} |
| 535 |
} |
| 536 |
return true; |
| 537 |
} |
| 538 |
|
| 539 |
public function incr( $key, $offset = 1, $group = 'default' ) { |
| 540 |
$id = $this->full_key( $key, $group ); |
| 541 |
$offset = max( 0, (int) $offset ); |
| 542 |
if ( $this->is_persistent_group( $group ) ) { |
| 543 |
try { |
| 544 |
$new = $this->backend_incr( $id, $offset ); |
| 545 |
if ( false !== $new ) { |
| 546 |
$this->cache[ $id ] = (int) $new; |
| 547 |
return (int) $new; |
| 548 |
} |
| 549 |
} catch ( \Throwable $e ) { |
| 550 |
// fall through |
| 551 |
} |
| 552 |
} |
| 553 |
$val = isset( $this->cache[ $id ] ) ? (int) $this->cache[ $id ] : 0; |
| 554 |
$val = max( 0, $val + $offset ); |
| 555 |
$this->cache[ $id ] = $val; |
| 556 |
return $val; |
| 557 |
} |
| 558 |
|
| 559 |
public function decr( $key, $offset = 1, $group = 'default' ) { |
| 560 |
$id = $this->full_key( $key, $group ); |
| 561 |
$offset = max( 0, (int) $offset ); |
| 562 |
if ( $this->is_persistent_group( $group ) ) { |
| 563 |
try { |
| 564 |
$new = $this->backend_decr( $id, $offset ); |
| 565 |
if ( false !== $new ) { |
| 566 |
$new = max( 0, (int) $new ); |
| 567 |
$this->cache[ $id ] = $new; |
| 568 |
return $new; |
| 569 |
} |
| 570 |
} catch ( \Throwable $e ) { |
| 571 |
// fall through |
| 572 |
} |
| 573 |
} |
| 574 |
$val = isset( $this->cache[ $id ] ) ? (int) $this->cache[ $id ] : 0; |
| 575 |
$val = max( 0, $val - $offset ); |
| 576 |
$this->cache[ $id ] = $val; |
| 577 |
return $val; |
| 578 |
} |
| 579 |
|
| 580 |
public function flush() { |
| 581 |
$this->cache = array(); |
| 582 |
if ( $this->persistent ) { |
| 583 |
try { |
| 584 |
return (bool) $this->backend_flush( ); |
| 585 |
} catch ( \Throwable $e ) { |
| 586 |
return false; |
| 587 |
} |
| 588 |
} |
| 589 |
return true; |
| 590 |
} |
| 591 |
|
| 592 |
// --- Backend dispatch ------------------------------------------ |
| 593 |
// Normalises method-name differences across the four client kinds: |
| 594 |
// phpredis + our Redis_Client (redis backend), ext/memcached + our |
| 595 |
// Memcached_Client (memcached backend). |
| 596 |
|
| 597 |
private function backend_delete( $id ) { |
| 598 |
if ( 'redis' === $this->backend ) { |
| 599 |
return $this->conn->del( $id ); |
| 600 |
} |
| 601 |
return $this->conn->delete( $id ); |
| 602 |
} |
| 603 |
|
| 604 |
private function backend_incr( $id, $offset ) { |
| 605 |
if ( 'redis' === $this->backend ) { |
| 606 |
return $this->conn->incrBy( $id, $offset ); |
| 607 |
} |
| 608 |
return 'builtin-memcached' === $this->client |
| 609 |
? $this->conn->incr( $id, $offset ) |
| 610 |
: $this->conn->increment( $id, $offset ); |
| 611 |
} |
| 612 |
|
| 613 |
private function backend_decr( $id, $offset ) { |
| 614 |
if ( 'redis' === $this->backend ) { |
| 615 |
return $this->conn->decrBy( $id, $offset ); |
| 616 |
} |
| 617 |
return 'builtin-memcached' === $this->client |
| 618 |
? $this->conn->decr( $id, $offset ) |
| 619 |
: $this->conn->decrement( $id, $offset ); |
| 620 |
} |
| 621 |
|
| 622 |
private function backend_flush() { |
| 623 |
if ( 'redis' === $this->backend ) { |
| 624 |
return $this->conn->flushDB(); |
| 625 |
} |
| 626 |
return 'builtin-memcached' === $this->client |
| 627 |
? $this->conn->flush_all() |
| 628 |
: $this->conn->flush(); |
| 629 |
} |
| 630 |
|
| 631 |
/** |
| 632 |
* Load xSpeed's own Memcached_Client (pure-PHP) on demand, the same |
| 633 |
* way load_builtin_client() loads the Redis one. |
| 634 |
*/ |
| 635 |
private function load_builtin_memcached() { |
| 636 |
return $this->load_builtin( '\\XSpeed\\Memcached_Client', 'class-memcached-client.php' ); |
| 637 |
} |
| 638 |
|
| 639 |
public function flush_runtime() { |
| 640 |
$this->cache = array(); |
| 641 |
return true; |
| 642 |
} |
| 643 |
|
| 644 |
public function flush_group( $group ) { |
| 645 |
// Without key tagging we can't selectively flush a group on the |
| 646 |
// persistent store cheaply; clear the runtime copy for the group. |
| 647 |
$needle = $this->full_key( '', $group ); |
| 648 |
foreach ( array_keys( $this->cache ) as $id ) { |
| 649 |
if ( 0 === strpos( $id, $needle ) ) { |
| 650 |
unset( $this->cache[ $id ] ); |
| 651 |
} |
| 652 |
} |
| 653 |
return true; |
| 654 |
} |
| 655 |
|
| 656 |
public function close() { |
| 657 |
if ( $this->persistent && $this->conn ) { |
| 658 |
try { |
| 659 |
if ( 'redis' === $this->backend ) { |
| 660 |
$this->conn->close(); |
| 661 |
} else { |
| 662 |
$this->conn->quit(); |
| 663 |
} |
| 664 |
} catch ( \Throwable $e ) { |
| 665 |
// ignore |
| 666 |
} |
| 667 |
} |
| 668 |
return true; |
| 669 |
} |
| 670 |
|
| 671 |
// --- Group config --------------------------------------------------- |
| 672 |
|
| 673 |
public function add_global_groups( $groups ) { |
| 674 |
foreach ( (array) $groups as $g ) { |
| 675 |
$this->global_groups[ $g ] = true; |
| 676 |
} |
| 677 |
} |
| 678 |
|
| 679 |
public function add_non_persistent_groups( $groups ) { |
| 680 |
foreach ( (array) $groups as $g ) { |
| 681 |
$this->non_persistent_groups[ $g ] = true; |
| 682 |
} |
| 683 |
} |
| 684 |
|
| 685 |
public function switch_to_blog( $blog_id ) { |
| 686 |
$this->blog_prefix = $this->multisite ? (int) $blog_id : 0; |
| 687 |
} |
| 688 |
|
| 689 |
/** @return array{backend:string,persistent:bool,hits:int,misses:int} */ |
| 690 |
public function stats() { |
| 691 |
return array( |
| 692 |
'backend' => $this->backend, |
| 693 |
'persistent' => $this->persistent, |
| 694 |
'hits' => $this->cache_hits, |
| 695 |
'misses' => $this->cache_misses, |
| 696 |
); |
| 697 |
} |
| 698 |
} |
| 699 |
} |
| 700 |
|
