| 1 |
<?php |
| 2 |
// Memcached Redux |
| 3 |
|
| 4 |
if ( !defined( 'WP_CACHE_KEY_SALT' ) ) { |
| 5 |
define( 'WP_CACHE_KEY_SALT', '' ); |
| 6 |
} |
| 7 |
|
| 8 |
if ( class_exists( 'Memcached' ) ): |
| 9 |
|
| 10 |
function wp_cache_add( $key, $data, $group = '', $expire = 0 ) { |
| 11 |
global $wp_object_cache; |
| 12 |
|
| 13 |
return $wp_object_cache->add( $key, $data, $group, $expire ); |
| 14 |
} |
| 15 |
|
| 16 |
function wp_cache_incr( $key, $n = 1, $group = '' ) { |
| 17 |
global $wp_object_cache; |
| 18 |
|
| 19 |
return $wp_object_cache->incr( $key, $n, $group ); |
| 20 |
} |
| 21 |
|
| 22 |
function wp_cache_decr( $key, $n = 1, $group = '' ) { |
| 23 |
global $wp_object_cache; |
| 24 |
|
| 25 |
return $wp_object_cache->decr( $key, $n, $group ); |
| 26 |
} |
| 27 |
|
| 28 |
function wp_cache_close() { |
| 29 |
global $wp_object_cache; |
| 30 |
|
| 31 |
return $wp_object_cache->close(); |
| 32 |
} |
| 33 |
|
| 34 |
function wp_cache_delete( $key, $group = '' ) { |
| 35 |
global $wp_object_cache; |
| 36 |
|
| 37 |
return $wp_object_cache->delete( $key, $group ); |
| 38 |
} |
| 39 |
|
| 40 |
function wp_cache_flush() { |
| 41 |
global $wp_object_cache; |
| 42 |
|
| 43 |
return $wp_object_cache->flush(); |
| 44 |
} |
| 45 |
|
| 46 |
function wp_cache_get( $key, $group = '', $force = false, &$found = null ) { |
| 47 |
global $wp_object_cache; |
| 48 |
|
| 49 |
return $wp_object_cache->get( $key, $group, $force, $found ); |
| 50 |
} |
| 51 |
|
| 52 |
/** |
| 53 |
* $keys_and_groups = array( |
| 54 |
* array( 'key', 'group' ), |
| 55 |
* array( 'key', '' ), |
| 56 |
* array( 'key', 'group' ), |
| 57 |
* array( 'key' ) |
| 58 |
* ); |
| 59 |
* |
| 60 |
*/ |
| 61 |
function wp_cache_get_multi( $key_and_groups, $bucket = 'default' ) { |
| 62 |
global $wp_object_cache; |
| 63 |
|
| 64 |
return $wp_object_cache->get_multi( $key_and_groups, $bucket ); |
| 65 |
} |
| 66 |
|
| 67 |
/** |
| 68 |
* $items = array( |
| 69 |
* array( 'key', 'data', 'group' ), |
| 70 |
* array( 'key', 'data' ) |
| 71 |
* ); |
| 72 |
* |
| 73 |
*/ |
| 74 |
function wp_cache_set_multi( $items, $expire = 0, $group = 'default' ) { |
| 75 |
global $wp_object_cache; |
| 76 |
|
| 77 |
return $wp_object_cache->set_multi( $items, $expire = 0, $group = 'default' ); |
| 78 |
} |
| 79 |
|
| 80 |
function wp_cache_init() { |
| 81 |
global $wp_object_cache; |
| 82 |
|
| 83 |
$wp_object_cache = new WP_Object_Cache(); |
| 84 |
} |
| 85 |
|
| 86 |
function wp_cache_replace( $key, $data, $group = '', $expire = 0 ) { |
| 87 |
global $wp_object_cache; |
| 88 |
|
| 89 |
return $wp_object_cache->replace( $key, $data, $group, $expire ); |
| 90 |
} |
| 91 |
|
| 92 |
function wp_cache_set( $key, $data, $group = '', $expire = 0 ) { |
| 93 |
global $wp_object_cache; |
| 94 |
|
| 95 |
if ( defined( 'WP_INSTALLING' ) == false ) |
| 96 |
return $wp_object_cache->set( $key, $data, $group, $expire ); |
| 97 |
else |
| 98 |
return $wp_object_cache->delete( $key, $group ); |
| 99 |
} |
| 100 |
|
| 101 |
function wp_cache_add_global_groups( $groups ) { |
| 102 |
global $wp_object_cache; |
| 103 |
|
| 104 |
$wp_object_cache->add_global_groups( $groups ); |
| 105 |
} |
| 106 |
|
| 107 |
function wp_cache_add_non_persistent_groups( $groups ) { |
| 108 |
global $wp_object_cache; |
| 109 |
|
| 110 |
$wp_object_cache->add_non_persistent_groups( $groups ); |
| 111 |
} |
| 112 |
|
| 113 |
class WP_Object_Cache { |
| 114 |
var $global_groups = array(); |
| 115 |
|
| 116 |
var $no_mc_groups = array(); |
| 117 |
|
| 118 |
var $cache = array(); |
| 119 |
var $mc = array(); |
| 120 |
var $stats = array(); |
| 121 |
var $group_ops = array(); |
| 122 |
|
| 123 |
var $cache_enabled = true; |
| 124 |
var $default_expiration = 0; |
| 125 |
|
| 126 |
function add( $id, $data, $group = 'default', $expire = 0 ) { |
| 127 |
$key = $this->key( $id, $group ); |
| 128 |
|
| 129 |
if ( is_object( $data ) ) |
| 130 |
$data = clone $data; |
| 131 |
|
| 132 |
if ( in_array( $group, $this->no_mc_groups ) ) { |
| 133 |
$this->cache[$key] = $data; |
| 134 |
return true; |
| 135 |
} elseif ( isset( $this->cache[$key] ) && $this->cache[$key] !== false ) { |
| 136 |
return false; |
| 137 |
} |
| 138 |
|
| 139 |
$mc =& $this->get_mc( $group ); |
| 140 |
$expire = ( $expire == 0) ? $this->default_expiration : $expire; |
| 141 |
$result = $mc->add( $key, $data, $expire ); |
| 142 |
|
| 143 |
if ( false !== $result ) { |
| 144 |
@ ++$this->stats['add']; |
| 145 |
$this->group_ops[$group][] = "add $id"; |
| 146 |
$this->cache[$key] = $data; |
| 147 |
} |
| 148 |
|
| 149 |
return $result; |
| 150 |
} |
| 151 |
|
| 152 |
function add_global_groups( $groups ) { |
| 153 |
if ( ! is_array( $groups ) ) |
| 154 |
$groups = (array) $groups; |
| 155 |
|
| 156 |
$this->global_groups = array_merge( $this->global_groups, $groups ); |
| 157 |
$this->global_groups = array_unique( $this->global_groups ); |
| 158 |
} |
| 159 |
|
| 160 |
function add_non_persistent_groups( $groups ) { |
| 161 |
if ( ! is_array( $groups ) ) |
| 162 |
$groups = (array) $groups; |
| 163 |
|
| 164 |
$this->no_mc_groups = array_merge( $this->no_mc_groups, $groups ); |
| 165 |
$this->no_mc_groups = array_unique( $this->no_mc_groups ); |
| 166 |
} |
| 167 |
|
| 168 |
function incr( $id, $n = 1, $group = 'default' ) { |
| 169 |
$key = $this->key( $id, $group ); |
| 170 |
$mc =& $this->get_mc( $group ); |
| 171 |
$this->cache[ $key ] = $mc->increment( $key, $n ); |
| 172 |
return $this->cache[ $key ]; |
| 173 |
} |
| 174 |
|
| 175 |
function decr( $id, $n = 1, $group = 'default' ) { |
| 176 |
$key = $this->key( $id, $group ); |
| 177 |
$mc =& $this->get_mc( $group ); |
| 178 |
$this->cache[ $key ] = $mc->decrement( $key, $n ); |
| 179 |
return $this->cache[ $key ]; |
| 180 |
} |
| 181 |
|
| 182 |
function close() { |
| 183 |
// Silence is Golden. |
| 184 |
} |
| 185 |
|
| 186 |
function delete( $id, $group = 'default' ) { |
| 187 |
$key = $this->key( $id, $group ); |
| 188 |
|
| 189 |
if ( in_array( $group, $this->no_mc_groups ) ) { |
| 190 |
unset( $this->cache[$key] ); |
| 191 |
return true; |
| 192 |
} |
| 193 |
|
| 194 |
$mc =& $this->get_mc( $group ); |
| 195 |
|
| 196 |
$result = $mc->delete( $key ); |
| 197 |
|
| 198 |
@ ++$this->stats['delete']; |
| 199 |
$this->group_ops[$group][] = "delete $id"; |
| 200 |
|
| 201 |
if ( false !== $result ) |
| 202 |
unset( $this->cache[$key] ); |
| 203 |
|
| 204 |
return $result; |
| 205 |
} |
| 206 |
|
| 207 |
function flush() { |
| 208 |
// Don't flush if multi-blog. |
| 209 |
if ( function_exists( 'is_site_admin' ) || defined( 'CUSTOM_USER_TABLE' ) && defined( 'CUSTOM_USER_META_TABLE' ) ) |
| 210 |
return true; |
| 211 |
|
| 212 |
$ret = true; |
| 213 |
foreach ( array_keys( $this->mc ) as $group ) |
| 214 |
$ret &= $this->mc[$group]->flush(); |
| 215 |
return $ret; |
| 216 |
} |
| 217 |
|
| 218 |
function get( $id, $group = 'default', $force = false, &$found = null ) { |
| 219 |
$key = $this->key( $id, $group ); |
| 220 |
$mc =& $this->get_mc( $group ); |
| 221 |
$found = false; |
| 222 |
|
| 223 |
if ( isset( $this->cache[$key] ) && ( !$force || in_array( $group, $this->no_mc_groups ) ) ) { |
| 224 |
$found = true; |
| 225 |
if ( is_object( $this->cache[$key] ) ) |
| 226 |
$value = clone $this->cache[$key]; |
| 227 |
else |
| 228 |
$value = $this->cache[$key]; |
| 229 |
} else if ( in_array( $group, $this->no_mc_groups ) ) { |
| 230 |
$this->cache[$key] = $value = false; |
| 231 |
} else { |
| 232 |
$value = $mc->get( $key ); |
| 233 |
if ( empty( $value ) || ( is_integer( $value ) && -1 == $value ) ){ |
| 234 |
$value = false; |
| 235 |
$found = $mc->getResultCode() !== Memcached::RES_NOTFOUND; |
| 236 |
} else { |
| 237 |
$found = true; |
| 238 |
} |
| 239 |
$this->cache[$key] = $value; |
| 240 |
} |
| 241 |
|
| 242 |
@ ++$this->stats['get']; |
| 243 |
$this->group_ops[$group][] = "get $id"; |
| 244 |
|
| 245 |
if ( 'checkthedatabaseplease' === $value ) { |
| 246 |
unset( $this->cache[$key] ); |
| 247 |
$value = false; |
| 248 |
} |
| 249 |
|
| 250 |
return $value; |
| 251 |
} |
| 252 |
|
| 253 |
function get_multi( $keys, $group = 'default' ) { |
| 254 |
$return = array(); |
| 255 |
$gets = array(); |
| 256 |
foreach ( $keys as $i => $values ) { |
| 257 |
$mc =& $this->get_mc( $group ); |
| 258 |
$values = (array) $values; |
| 259 |
if ( empty( $values[1] ) ) |
| 260 |
$values[1] = 'default'; |
| 261 |
|
| 262 |
list( $id, $group ) = (array) $values; |
| 263 |
$key = $this->key( $id, $group ); |
| 264 |
|
| 265 |
if ( isset( $this->cache[$key] ) ) { |
| 266 |
|
| 267 |
if ( is_object( $this->cache[$key] ) ) |
| 268 |
$return[$key] = clone $this->cache[$key]; |
| 269 |
else |
| 270 |
$return[$key] = $this->cache[$key]; |
| 271 |
|
| 272 |
} else if ( in_array( $group, $this->no_mc_groups ) ) { |
| 273 |
$return[$key] = false; |
| 274 |
|
| 275 |
} else { |
| 276 |
$gets[$key] = $key; |
| 277 |
} |
| 278 |
} |
| 279 |
|
| 280 |
if ( !empty( $gets ) ) { |
| 281 |
$results = $mc->getMulti( $gets, $null, Memcached::GET_PRESERVE_ORDER ); |
| 282 |
$joined = array_combine( array_keys( $gets ), array_values( $results ) ); |
| 283 |
$return = array_merge( $return, $joined ); |
| 284 |
} |
| 285 |
|
| 286 |
@ ++$this->stats['get_multi']; |
| 287 |
$this->group_ops[$group][] = "get_multi $id"; |
| 288 |
$this->cache = array_merge( $this->cache, $return ); |
| 289 |
return array_values( $return ); |
| 290 |
} |
| 291 |
|
| 292 |
function key( $key, $group ) { |
| 293 |
if ( empty( $group ) ) |
| 294 |
$group = 'default'; |
| 295 |
|
| 296 |
if ( false !== array_search( $group, $this->global_groups ) ) |
| 297 |
$prefix = $this->global_prefix; |
| 298 |
else |
| 299 |
$prefix = $this->blog_prefix; |
| 300 |
|
| 301 |
return preg_replace( '/\s+/', '', WP_CACHE_KEY_SALT . "$prefix$group:$key" ); |
| 302 |
} |
| 303 |
|
| 304 |
function replace( $id, $data, $group = 'default', $expire = 0 ) { |
| 305 |
$key = $this->key( $id, $group ); |
| 306 |
$expire = ( $expire == 0) ? $this->default_expiration : $expire; |
| 307 |
$mc =& $this->get_mc( $group ); |
| 308 |
|
| 309 |
if ( is_object( $data ) ) |
| 310 |
$data = clone $data; |
| 311 |
|
| 312 |
$result = $mc->replace( $key, $data, $expire ); |
| 313 |
if ( false !== $result ) |
| 314 |
$this->cache[$key] = $data; |
| 315 |
return $result; |
| 316 |
} |
| 317 |
|
| 318 |
function set( $id, $data, $group = 'default', $expire = 0 ) { |
| 319 |
$key = $this->key( $id, $group ); |
| 320 |
if ( isset( $this->cache[$key] ) && ( 'checkthedatabaseplease' === $this->cache[$key] ) ) |
| 321 |
return false; |
| 322 |
|
| 323 |
if ( is_object( $data) ) |
| 324 |
$data = clone $data; |
| 325 |
|
| 326 |
$this->cache[$key] = $data; |
| 327 |
|
| 328 |
if ( in_array( $group, $this->no_mc_groups ) ) |
| 329 |
return true; |
| 330 |
|
| 331 |
$expire = ( $expire == 0 ) ? $this->default_expiration : $expire; |
| 332 |
$mc =& $this->get_mc( $group ); |
| 333 |
$result = $mc->set( $key, $data, $expire ); |
| 334 |
|
| 335 |
return $result; |
| 336 |
} |
| 337 |
|
| 338 |
function set_multi( $items, $expire = 0, $group = 'default' ) { |
| 339 |
$sets = array(); |
| 340 |
$mc =& $this->get_mc( $group ); |
| 341 |
$expire = ( $expire == 0 ) ? $this->default_expiration : $expire; |
| 342 |
|
| 343 |
foreach ( $items as $i => $item ) { |
| 344 |
if ( empty( $item[2] ) ) |
| 345 |
$item[2] = 'default'; |
| 346 |
|
| 347 |
list( $id, $data, $group ) = $item; |
| 348 |
|
| 349 |
$key = $this->key( $id, $group ); |
| 350 |
if ( isset( $this->cache[$key] ) && ( 'checkthedatabaseplease' === $this->cache[$key] ) ) |
| 351 |
continue; |
| 352 |
|
| 353 |
if ( is_object( $data) ) |
| 354 |
$data = clone $data; |
| 355 |
|
| 356 |
$this->cache[$key] = $data; |
| 357 |
|
| 358 |
if ( in_array( $group, $this->no_mc_groups ) ) |
| 359 |
continue; |
| 360 |
|
| 361 |
$sets[$key] = $data; |
| 362 |
} |
| 363 |
|
| 364 |
if ( !empty( $sets ) ) |
| 365 |
$mc->setMulti( $sets, $expire ); |
| 366 |
} |
| 367 |
|
| 368 |
function colorize_debug_line( $line ) { |
| 369 |
$colors = array( |
| 370 |
'get' => 'green', |
| 371 |
'set' => 'purple', |
| 372 |
'add' => 'blue', |
| 373 |
'delete'=> 'red' |
| 374 |
); |
| 375 |
|
| 376 |
$cmd = substr( $line, 0, strpos( $line, ' ' ) ); |
| 377 |
|
| 378 |
$cmd2 = "<span style='color:{$colors[$cmd]}'>$cmd</span>"; |
| 379 |
|
| 380 |
return $cmd2 . substr( $line, strlen( $cmd ) ) . "\n"; |
| 381 |
} |
| 382 |
|
| 383 |
function stats() { |
| 384 |
echo "<p>\n"; |
| 385 |
foreach ( $this->stats as $stat => $n ) { |
| 386 |
echo "<strong>$stat</strong> $n"; |
| 387 |
echo "<br/>\n"; |
| 388 |
} |
| 389 |
echo "</p>\n"; |
| 390 |
echo "<h3>Memcached:</h3>"; |
| 391 |
foreach ( $this->group_ops as $group => $ops ) { |
| 392 |
if ( !isset( $_GET['debug_queries'] ) && 500 < count( $ops ) ) { |
| 393 |
$ops = array_slice( $ops, 0, 500 ); |
| 394 |
echo "<big>Too many to show! <a href='" . add_query_arg( 'debug_queries', 'true' ) . "'>Show them anyway</a>.</big>\n"; |
| 395 |
} |
| 396 |
echo "<h4>$group commands</h4>"; |
| 397 |
echo "<pre>\n"; |
| 398 |
$lines = array(); |
| 399 |
foreach ( $ops as $op ) { |
| 400 |
$lines[] = $this->colorize_debug_line( $op ); |
| 401 |
} |
| 402 |
print_r( $lines ); |
| 403 |
echo "</pre>\n"; |
| 404 |
} |
| 405 |
|
| 406 |
if ( !empty( $this->debug ) && $this->debug ) |
| 407 |
var_dump( $this->memcache_debug ); |
| 408 |
} |
| 409 |
|
| 410 |
function &get_mc( $group ) { |
| 411 |
if ( isset( $this->mc[$group] ) ) |
| 412 |
return $this->mc[$group]; |
| 413 |
return $this->mc['default']; |
| 414 |
} |
| 415 |
|
| 416 |
function WP_Object_Cache() { |
| 417 |
global $memcached_servers; |
| 418 |
|
| 419 |
if ( isset( $memcached_servers ) ) |
| 420 |
$buckets = $memcached_servers; |
| 421 |
else |
| 422 |
$buckets = array( '127.0.0.1' ); |
| 423 |
|
| 424 |
reset( $buckets ); |
| 425 |
if ( is_int( key( $buckets ) ) ) |
| 426 |
$buckets = array( 'default' => $buckets ); |
| 427 |
|
| 428 |
foreach ( $buckets as $bucket => $servers ) { |
| 429 |
$this->mc[$bucket] = new Memcached(); |
| 430 |
|
| 431 |
$instances = array(); |
| 432 |
foreach ( $servers as $server ) { |
| 433 |
@list( $node, $port ) = explode( ':', $server ); |
| 434 |
if ( empty( $port ) ) |
| 435 |
$port = ini_get( 'memcache.default_port' ); |
| 436 |
$port = intval( $port ); |
| 437 |
if ( !$port ) |
| 438 |
$port = 11211; |
| 439 |
|
| 440 |
$instances[] = array( $node, $port, 1 ); |
| 441 |
} |
| 442 |
$this->mc[$bucket]->addServers( $instances ); |
| 443 |
} |
| 444 |
|
| 445 |
global $blog_id, $table_prefix; |
| 446 |
$this->global_prefix = ''; |
| 447 |
$this->blog_prefix = ''; |
| 448 |
if ( function_exists( 'is_multisite' ) ) { |
| 449 |
$this->global_prefix = ( is_multisite() || defined( 'CUSTOM_USER_TABLE' ) && defined( 'CUSTOM_USER_META_TABLE' ) ) ? '' : $table_prefix; |
| 450 |
$this->blog_prefix = ( is_multisite() ? $blog_id : $table_prefix ) . ':'; |
| 451 |
} |
| 452 |
|
| 453 |
$this->cache_hits =& $this->stats['get']; |
| 454 |
$this->cache_misses =& $this->stats['add']; |
| 455 |
} |
| 456 |
} |
| 457 |
else: // No Memcached |
| 458 |
|
| 459 |
// In 3.7+, we can handle this smoothly |
| 460 |
if ( function_exists( 'wp_using_ext_object_cache' ) ) { |
| 461 |
wp_using_ext_object_cache( false ); |
| 462 |
|
| 463 |
// In earlier versions, there isn't a clean bail-out method. |
| 464 |
} else { |
| 465 |
wp_die( 'Memcached class not available.' ); |
| 466 |
} |
| 467 |
|
| 468 |
endif; |
| 469 |
|
