add( $key, $data, $group, $expire );
}
function wp_cache_incr( $key, $n = 1, $group = '' ) {
global $wp_object_cache;
return $wp_object_cache->incr( $key, $n, $group );
}
function wp_cache_decr( $key, $n = 1, $group = '' ) {
global $wp_object_cache;
return $wp_object_cache->decr( $key, $n, $group );
}
function wp_cache_close() {
global $wp_object_cache;
return $wp_object_cache->close();
}
function wp_cache_delete( $key, $group = '' ) {
global $wp_object_cache;
return $wp_object_cache->delete( $key, $group );
}
function wp_cache_flush() {
global $wp_object_cache;
return $wp_object_cache->flush();
}
function wp_cache_get( $key, $group = '', $force = false, &$found = null ) {
global $wp_object_cache;
return $wp_object_cache->get( $key, $group, $force, $found );
}
/**
* $keys_and_groups = array(
* array( 'key', 'group' ),
* array( 'key', '' ),
* array( 'key', 'group' ),
* array( 'key' )
* );
*
*/
function wp_cache_get_multi( $key_and_groups, $bucket = 'default' ) {
global $wp_object_cache;
return $wp_object_cache->get_multi( $key_and_groups, $bucket );
}
/**
* $items = array(
* array( 'key', 'data', 'group' ),
* array( 'key', 'data' )
* );
*
*/
function wp_cache_set_multi( $items, $expire = 0, $group = 'default' ) {
global $wp_object_cache;
return $wp_object_cache->set_multi( $items, $expire = 0, $group = 'default' );
}
function wp_cache_init() {
global $wp_object_cache;
$wp_object_cache = new WP_Object_Cache();
}
function wp_cache_replace( $key, $data, $group = '', $expire = 0 ) {
global $wp_object_cache;
return $wp_object_cache->replace( $key, $data, $group, $expire );
}
function wp_cache_set( $key, $data, $group = '', $expire = 0 ) {
global $wp_object_cache;
if ( defined( 'WP_INSTALLING' ) == false )
return $wp_object_cache->set( $key, $data, $group, $expire );
else
return $wp_object_cache->delete( $key, $group );
}
function wp_cache_add_global_groups( $groups ) {
global $wp_object_cache;
$wp_object_cache->add_global_groups( $groups );
}
function wp_cache_add_non_persistent_groups( $groups ) {
global $wp_object_cache;
$wp_object_cache->add_non_persistent_groups( $groups );
}
class WP_Object_Cache {
var $global_groups = array();
var $no_mc_groups = array();
var $cache = array();
var $mc = array();
var $stats = array();
var $group_ops = array();
var $cache_enabled = true;
var $default_expiration = 0;
function add( $id, $data, $group = 'default', $expire = 0 ) {
$key = $this->key( $id, $group );
if ( is_object( $data ) )
$data = clone $data;
if ( in_array( $group, $this->no_mc_groups ) ) {
$this->cache[$key] = $data;
return true;
} elseif ( isset( $this->cache[$key] ) && $this->cache[$key] !== false ) {
return false;
}
$mc =& $this->get_mc( $group );
$expire = ( $expire == 0) ? $this->default_expiration : $expire;
$result = $mc->add( $key, $data, $expire );
if ( false !== $result ) {
++$this->stats['add'];
$this->group_ops[$group][] = "add $id";
$this->cache[$key] = $data;
}
return $result;
}
function add_global_groups( $groups ) {
if ( ! is_array( $groups ) )
$groups = (array) $groups;
$this->global_groups = array_merge( $this->global_groups, $groups );
$this->global_groups = array_unique( $this->global_groups );
}
function add_non_persistent_groups( $groups ) {
if ( ! is_array( $groups ) )
$groups = (array) $groups;
$this->no_mc_groups = array_merge( $this->no_mc_groups, $groups );
$this->no_mc_groups = array_unique( $this->no_mc_groups );
}
function incr( $id, $n = 1, $group = 'default' ) {
$key = $this->key( $id, $group );
$mc =& $this->get_mc( $group );
$this->cache[ $key ] = $mc->increment( $key, $n );
return $this->cache[ $key ];
}
function decr( $id, $n = 1, $group = 'default' ) {
$key = $this->key( $id, $group );
$mc =& $this->get_mc( $group );
$this->cache[ $key ] = $mc->decrement( $key, $n );
return $this->cache[ $key ];
}
function close() {
// Silence is Golden.
}
function delete( $id, $group = 'default' ) {
$key = $this->key( $id, $group );
if ( in_array( $group, $this->no_mc_groups ) ) {
unset( $this->cache[$key] );
return true;
}
$mc =& $this->get_mc( $group );
$result = $mc->delete( $key );
if ( false !== $result ) {
++$this->stats['delete'];
$this->group_ops[$group][] = "delete $id";
unset( $this->cache[$key] );
}
return $result;
}
function flush() {
// Don't flush if multi-blog.
if ( function_exists( 'is_site_admin' ) || defined( 'CUSTOM_USER_TABLE' ) && defined( 'CUSTOM_USER_META_TABLE' ) )
return true;
$ret = true;
foreach ( array_keys( $this->mc ) as $group )
$ret &= $this->mc[$group]->flush();
return $ret;
}
function get( $id, $group = 'default', $force = false, &$found = null ) {
$key = $this->key( $id, $group );
$mc =& $this->get_mc( $group );
$found = false;
if ( isset( $this->cache[$key] ) && ( !$force || in_array( $group, $this->no_mc_groups ) ) ) {
$found = true;
if ( is_object( $this->cache[$key] ) )
$value = clone $this->cache[$key];
else
$value = $this->cache[$key];
} else if ( in_array( $group, $this->no_mc_groups ) ) {
$this->cache[$key] = $value = false;
} else {
$value = $mc->get( $key );
if ( empty( $value ) || ( is_integer( $value ) && -1 == $value ) ){
$value = false;
$found = $mc->getResultCode() !== Memcached::RES_NOTFOUND;
} else {
$found = true;
}
$this->cache[$key] = $value;
}
if ( $found ) {
++$this->stats['get'];
$this->group_ops[$group][] = "get $id";
} else {
++$this->stats['miss'];
}
if ( 'checkthedatabaseplease' === $value ) {
unset( $this->cache[$key] );
$value = false;
}
return $value;
}
function get_multi( $keys, $group = 'default' ) {
$return = array();
$gets = array();
foreach ( $keys as $i => $values ) {
$mc =& $this->get_mc( $group );
$values = (array) $values;
if ( empty( $values[1] ) )
$values[1] = 'default';
list( $id, $group ) = (array) $values;
$key = $this->key( $id, $group );
if ( isset( $this->cache[$key] ) ) {
if ( is_object( $this->cache[$key] ) )
$return[$key] = clone $this->cache[$key];
else
$return[$key] = $this->cache[$key];
} else if ( in_array( $group, $this->no_mc_groups ) ) {
$return[$key] = false;
} else {
$gets[$key] = $key;
}
}
if ( !empty( $gets ) ) {
$results = $mc->getMulti( $gets, $null, Memcached::GET_PRESERVE_ORDER );
$joined = array_combine( array_keys( $gets ), array_values( $results ) );
$return = array_merge( $return, $joined );
}
++$this->stats['get_multi'];
$this->group_ops[$group][] = "get_multi $id";
$this->cache = array_merge( $this->cache, $return );
return array_values( $return );
}
function key( $key, $group ) {
if ( empty( $group ) )
$group = 'default';
if ( false !== array_search( $group, $this->global_groups ) )
$prefix = $this->global_prefix;
else
$prefix = $this->blog_prefix;
return preg_replace( '/\s+/', '', WP_CACHE_KEY_SALT . "$prefix$group:$key" );
}
function replace( $id, $data, $group = 'default', $expire = 0 ) {
$key = $this->key( $id, $group );
$expire = ( $expire == 0) ? $this->default_expiration : $expire;
$mc =& $this->get_mc( $group );
if ( is_object( $data ) )
$data = clone $data;
$result = $mc->replace( $key, $data, $expire );
if ( false !== $result )
$this->cache[$key] = $data;
return $result;
}
function set( $id, $data, $group = 'default', $expire = 0 ) {
$key = $this->key( $id, $group );
if ( isset( $this->cache[$key] ) && ( 'checkthedatabaseplease' === $this->cache[$key] ) )
return false;
if ( is_object( $data) )
$data = clone $data;
$this->cache[$key] = $data;
if ( in_array( $group, $this->no_mc_groups ) )
return true;
$expire = ( $expire == 0 ) ? $this->default_expiration : $expire;
$mc =& $this->get_mc( $group );
$result = $mc->set( $key, $data, $expire );
return $result;
}
function set_multi( $items, $expire = 0, $group = 'default' ) {
$sets = array();
$mc =& $this->get_mc( $group );
$expire = ( $expire == 0 ) ? $this->default_expiration : $expire;
foreach ( $items as $i => $item ) {
if ( empty( $item[2] ) )
$item[2] = 'default';
list( $id, $data, $group ) = $item;
$key = $this->key( $id, $group );
if ( isset( $this->cache[$key] ) && ( 'checkthedatabaseplease' === $this->cache[$key] ) )
continue;
if ( is_object( $data) )
$data = clone $data;
$this->cache[$key] = $data;
if ( in_array( $group, $this->no_mc_groups ) )
continue;
$sets[$key] = $data;
}
if ( !empty( $sets ) )
$mc->setMulti( $sets, $expire );
}
function colorize_debug_line( $line ) {
$colors = array(
'get' => 'green',
'set' => 'purple',
'add' => 'blue',
'delete'=> 'red'
);
$cmd = substr( $line, 0, strpos( $line, ' ' ) );
$cmd2 = "" . esc_html( $cmd ) . "";
return $cmd2 . esc_html( substr( $line, strlen( $cmd ) ) ) . "\n";
}
function stats() {
echo "\n";
foreach ( $this->stats as $stat => $n ) {
echo "" . esc_html( $stat ) . " " . esc_html( $n );
echo "
\n";
}
echo "
\n";
echo "Memcached:
";
foreach ( $this->group_ops as $group => $ops ) {
if ( !isset( $_GET['debug_queries'] ) && 500 < count( $ops ) ) {
$ops = array_slice( $ops, 0, 500 );
echo "Too many to show! Show them anyway.\n";
}
echo "" . esc_html( $group ) . " commands
";
echo "\n";
$lines = array();
foreach ( $ops as $op ) {
$lines[] = $this->colorize_debug_line( $op );
}
print_r( $lines );
echo "\n";
}
if ( !empty( $this->debug ) && $this->debug )
var_dump( $this->memcache_debug );
}
function &get_mc( $group ) {
if ( isset( $this->mc[$group] ) )
return $this->mc[$group];
return $this->mc['default'];
}
function __construct() {
$this->stats = array(
'get' => 0,
'get_multi' => 0,
'add' => 0,
'set' => 0,
'delete' => 0,
'miss' => 0,
);
global $memcached_servers;
if ( isset( $memcached_servers ) )
$buckets = $memcached_servers;
else
$buckets = array( '127.0.0.1:11211' );
reset( $buckets );
if ( is_int( key( $buckets ) ) )
$buckets = array( 'default' => $buckets );
foreach ( $buckets as $bucket => $servers ) {
$this->mc[$bucket] = new Memcached();
$instances = array();
foreach ( $servers as $server ) {
@list( $node, $port ) = explode( ':', $server );
if ( empty( $port ) )
$port = ini_get( 'memcache.default_port' );
$port = intval( $port );
if ( !$port )
$port = 11211;
$instances[] = array( $node, $port, 1 );
}
$this->mc[$bucket]->addServers( $instances );
}
global $blog_id, $table_prefix;
$this->global_prefix = '';
$this->blog_prefix = '';
if ( function_exists( 'is_multisite' ) ) {
$this->global_prefix = ( is_multisite() || defined( 'CUSTOM_USER_TABLE' ) && defined( 'CUSTOM_USER_META_TABLE' ) ) ? '' : $table_prefix;
$this->blog_prefix = ( is_multisite() ? $blog_id : $table_prefix ) . ':';
}
$this->cache_hits =& $this->stats['get'];
$this->cache_misses =& $this->stats['miss'];
}
}
else: // No Memcached
// In 3.7+, we can handle this smoothly
if ( function_exists( 'wp_using_ext_object_cache' ) ) {
wp_using_ext_object_cache( false );
// In earlier versions, there isn't a clean bail-out method.
} else {
wp_die( 'Memcached class not available.' );
}
endif;