147 lines
4.1 KiB
PHP
147 lines
4.1 KiB
PHP
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<?php
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/**
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* File: ConfigCache.php
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*
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* @package W3TC
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*/
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namespace W3TC;
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/**
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* Provides access to config cache, used mostly when config is stored in
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* database to not issue config loading database queries on each http request
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*/
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class ConfigCache {
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/**
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* Reads config from config cache
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*
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* @param int $blog_id Blog ID.
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* @param bool $preview Preview flag.
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*
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* @return array|null
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*/
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public static function util_array_from_storage( $blog_id, $preview ) {
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$cache = self::get_cache();
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$config = $cache->get( self::get_key( $blog_id, $preview ) );
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if ( is_array( $config ) ) {
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return $config;
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}
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return null;
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}
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/**
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* Removes config cache entry so that it can be read from original source
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* on next attempt
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*
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* @param int $blog_id Blog ID.
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* @param bool $preview Preview flag.
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*/
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public static function remove_item( $blog_id, $preview ) {
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$cache = self::get_cache();
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$cache->hard_delete( self::get_key( $blog_id, false ) );
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$cache->hard_delete( self::get_key( $blog_id, true ) );
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}
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/**
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* Saves config cache entry.
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*
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* @param int $blog_id Blog ID.
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* @param bool $preview Preview flag.
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* @param mixed $data Data.
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*/
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public static function save_item( $blog_id, $preview, $data ) {
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$cache = self::get_cache();
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$cache->set( self::get_key( $blog_id, $preview ), $data );
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}
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/**
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* Retrieves cache instance.
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*
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* @return object
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*/
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private static function get_cache() {
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static $cache = null;
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if ( ! is_null( $cache ) ) {
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return $cache;
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}
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switch ( W3TC_CONFIG_CACHE_ENGINE ) {
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case 'memcached':
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$engine_config = array(
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'servers' =>
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explode( ',', W3TC_CONFIG_CACHE_MEMCACHED_SERVERS ),
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'persistent' =>
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( defined( 'W3TC_CONFIG_CACHE_MEMCACHED_PERSISTENT' ) ?
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W3TC_CONFIG_CACHE_MEMCACHED_PERSISTENT : true ),
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'aws_autodiscovery' =>
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( defined( 'W3TC_CONFIG_CACHE_MEMCACHED_AWS_AUTODISCOVERY' ) ?
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W3TC_CONFIG_CACHE_MEMCACHED_AWS_AUTODISCOVERY : false ),
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'username' =>
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( defined( 'W3TC_CONFIG_CACHE_MEMCACHED_USERNAME' ) ?
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W3TC_CONFIG_CACHE_MEMCACHED_USERNAME : '' ),
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'password' =>
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( defined( 'W3TC_CONFIG_CACHE_MEMCACHED_PASSWORD' ) ?
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W3TC_CONFIG_CACHE_MEMCACHED_PASSWORD : '' ),
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'key_version_mode' => 'disabled',
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);
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break;
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case 'redis':
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$engine_config = array(
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'servers' =>
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explode( ',', W3TC_CONFIG_CACHE_REDIS_SERVERS ),
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'verify_tls_certificates' =>
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( defined( 'W3TC_CONFIG_CACHE_REDIS_VERIFY_TLS_CERTIFICATES' ) ?
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W3TC_CONFIG_CACHE_REDIS_VERIFY_TLS_CERTIFICATES : true ),
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'persistent' =>
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( defined( 'W3TC_CONFIG_CACHE_REDIS_PERSISTENT' ) ?
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W3TC_CONFIG_CACHE_REDIS_PERSISTENT : true ),
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'dbid' =>
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( defined( 'W3TC_CONFIG_CACHE_REDIS_DBID' ) ?
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W3TC_CONFIG_CACHE_REDIS_DBID : 0 ),
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'password' =>
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( defined( 'W3TC_CONFIG_CACHE_REDIS_PASSWORD' ) ?
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W3TC_CONFIG_CACHE_REDIS_PASSWORD : '' ),
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'timeout' =>
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( defined( 'W3TC_CONFIG_CACHE_REDIS_TIMEOUT' ) ?
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W3TC_CONFIG_CACHE_REDIS_TIMEOUT : 0 ),
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'retry_interval' =>
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( defined( 'W3TC_CONFIG_CACHE_REDIS_RETRY_INTERVAL' ) ?
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W3TC_CONFIG_CACHE_REDIS_RETRY_INTERVAL : 0 ),
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'read_timeout' =>
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( defined( 'W3TC_CONFIG_CACHE_REDIS_READ_TIMEOUT' ) ?
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W3TC_CONFIG_CACHE_REDIS_READ_TIMEOUT : 0 ),
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'key_version_mode' => 'disabled',
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);
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break;
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default:
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$engine_config = array();
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}
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$engine_config['blog_id'] = '0';
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$engine_config['module'] = 'config';
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$engine_config['host'] = '';
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$engine_config['instance_id'] = ( defined( 'W3TC_INSTANCE_ID' ) ? W3TC_INSTANCE_ID : 0 );
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$cache = Cache::instance( W3TC_CONFIG_CACHE_ENGINE, $engine_config );
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return $cache;
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}
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/**
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* Retrieves config cache key.
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*
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* @param int $blog_id Blog ID.
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* @param bool $preview Preview flag.
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*
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* @return string
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*/
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private static function get_key( $blog_id, $preview ) {
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return 'w3tc_config_' . $blog_id . ( $preview ? '_preview' : '' );
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}
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}
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