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<?php |
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/** |
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* Simple Machines Forum (SMF) |
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* |
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* @package SMF |
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* @author Simple Machines http://www.simplemachines.org |
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* @copyright 2017 Simple Machines and individual contributors |
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* @license http://www.simplemachines.org/about/smf/license.php BSD |
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* |
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* @version 2.1 Beta 4 |
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*/ |
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if (!defined('SMF')) |
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die('Hacking attempt...'); |
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/** |
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* PostgreSQL Cache API class |
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* @package cacheAPI |
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*/ |
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class postgres_cache extends cache_api |
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{ |
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/** |
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* @var false|resource of the pg_prepare from get_data. |
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*/ |
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private $pg_get_data_prep; |
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/** |
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* @var false|resource of the pg_prepare from put_data. |
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*/ |
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private $pg_put_data_prep; |
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public function __construct() |
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{ |
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parent::__construct(); |
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} |
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/** |
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* {@inheritDoc} |
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*/ |
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public function connect() |
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{ |
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global $db_prefix, $db_connection; |
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pg_prepare($db_connection, '', 'SELECT 1 |
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FROM pg_tables |
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WHERE schemaname = $1 |
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AND tablename = $2'); |
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$result = pg_execute($db_connection, '', array('public', $db_prefix . 'cache')); |
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if (pg_affected_rows($result) === 0) |
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pg_query($db_connection, 'CREATE UNLOGGED TABLE {db_prefix}cache (key text, value text, ttl bigint, PRIMARY KEY (key))'); |
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} |
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/** |
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* {@inheritDoc} |
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*/ |
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public function isSupported($test = false) |
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{ |
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global $smcFunc, $db_connection; |
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if ($smcFunc['db_title'] !== 'PostgreSQL') |
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return false; |
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$result = pg_query($db_connection, 'SHOW server_version_num'); |
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$res = pg_fetch_assoc($result); |
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if ($res['server_version_num'] < 90500) |
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return false; |
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return $test ? true : parent::isSupported(); |
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} |
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/** |
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* {@inheritDoc} |
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*/ |
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public function getData($key, $ttl = null) |
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{ |
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global $db_prefix, $db_connection; |
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$ttl = time() - $ttl; |
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if (empty($this->pg_get_data_prep)) |
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$this->pg_get_data_prep = pg_prepare($db_connection, 'smf_cache_get_data', 'SELECT value FROM ' . $db_prefix . 'cache WHERE key = $1 AND ttl >= $2 LIMIT 1'); |
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$result = pg_execute($db_connection, 'smf_cache_get_data', array($key, $ttl)); |
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if (pg_affected_rows($result) === 0) |
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return null; |
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$res = pg_fetch_assoc($result); |
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return $res['value']; |
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} |
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/** |
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* {@inheritDoc} |
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*/ |
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public function putData($key, $value, $ttl = null) |
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{ |
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global $db_prefix, $db_connection; |
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if (!isset($value)) |
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$value = ''; |
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$ttl = time() + $ttl; |
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if (empty($this->pg_put_data_prep)) |
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$this->pg_put_data_prep = pg_prepare($db_connection, 'smf_cache_put_data', |
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'INSERT INTO ' . $db_prefix . 'cache(key,value,ttl) VALUES($1,$2,$3) |
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ON CONFLICT(key) DO UPDATE SET value = excluded.value, ttl = excluded.ttl' |
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); |
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$result = pg_execute($db_connection, 'smf_cache_put_data', array($key, $value, $ttl)); |
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if (pg_affected_rows($result) > 0) |
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return true; |
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else |
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return false; |
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} |
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/** |
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* {@inheritDoc} |
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*/ |
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public function cleanCache($type = '') |
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{ |
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global $smcFunc; |
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$smcFunc['db_query']('', |
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'TRUNCATE TABLE {db_prefix}cache', |
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array() |
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); |
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return true; |
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} |
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} |
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142
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?> |
Yoshi2889 /
SMF2.1
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