MemcachedBagOStuff.php

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<?php
class MemcachedBagOStuff extends BagOStuff {
        protected $client;

        protected function applyDefaultParams( $params ) {
                if ( !isset( $params['servers'] ) ) {
                        $params['servers'] = $GLOBALS['wgMemCachedServers'];
                }
                if ( !isset( $params['debug'] ) ) {
                        $params['debug'] = $GLOBALS['wgMemCachedDebug'];
                }
                if ( !isset( $params['persistent'] ) ) {
                        $params['persistent'] = $GLOBALS['wgMemCachedPersistent'];
                }
                if  ( !isset( $params['compress_threshold'] ) ) {
                        $params['compress_threshold'] = 1500;
                }
                if ( !isset( $params['timeout'] ) ) {
                        $params['timeout'] = $GLOBALS['wgMemCachedTimeout'];
                }
                if ( !isset( $params['connect_timeout'] ) ) {
                        $params['connect_timeout'] = 0.5;
                }
                return $params;
        }

        public function get( $key ) {
                return $this->client->get( $this->encodeKey( $key ) );
        }

        public function set( $key, $value, $exptime = 0 ) {
                return $this->client->set( $this->encodeKey( $key ), $value,
                        $this->fixExpiry( $exptime ) );
        }

        public function delete( $key, $time = 0 ) {
                return $this->client->delete( $this->encodeKey( $key ), $time );
        }

        public function add( $key, $value, $exptime = 0 ) {
                return $this->client->add( $this->encodeKey( $key ), $value,
                        $this->fixExpiry( $exptime ) );
        }

        public function replace( $key, $value, $exptime = 0 ) {
                return $this->client->replace( $this->encodeKey( $key ), $value, 
                        $this->fixExpiry( $exptime ) );
        }

        public function getClient() {
                return $this->client;
        }

        public function encodeKey( $key ) {
                return preg_replace_callback( '/[\x00-\x20\x25\x7f]+/',
                        array( $this, 'encodeKeyCallback' ), $key );
        }

        protected function encodeKeyCallback( $m ) {
                return rawurlencode( $m[0] );
        }

        function fixExpiry( $expiry ) {
                if ( $expiry > 2592000 && $expiry < 1000000000 ) {
                        $expiry = 2592000;
                }
                return $expiry;
        }

        public function decodeKey( $key ) {
                return urldecode( $key );
        }

        protected function debugLog( $text ) {
                global $wgDebugLogGroups;
                if( !isset( $wgDebugLogGroups['memcached'] ) ) {
                        # Prefix message since it will end up in main debug log file
                        $text = "memcached: $text";
                }
                if ( substr( $text, -1 ) !== "\n" ) {
                        $text .= "\n";
                }
                wfDebugLog( 'memcached', $text );
        }
}