152 lines
3.7 KiB
PHP
Executable file
152 lines
3.7 KiB
PHP
Executable file
<?php
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namespace b8;
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class Database extends \PDO
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{
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protected static $initialised = false;
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protected static $servers = array('read' => array(), 'write' => array());
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protected static $connections = array('read' => null, 'write' => null);
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protected static $details = array();
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protected static $lastUsed = array('read' => null, 'write' => null);
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/**
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* @deprecated
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*/
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public static function setReadServers($read)
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{
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$config = Config::getInstance();
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$settings = $config->get('b8.database', array());
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$settings['servers']['read'] = $read;
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$config->set('b8.database', $settings);
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}
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/**
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* @deprecated
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*/
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public static function setWriteServers($write)
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{
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$config = Config::getInstance();
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$settings = $config->get('b8.database', array());
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$settings['servers']['write'] = $write;
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$config->set('b8.database', $settings);
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}
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/**
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* @deprecated
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*/
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public static function setDetails($database, $username, $password)
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{
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$config = Config::getInstance();
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$settings = $config->get('b8.database', array());
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$settings['name'] = $database;
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$settings['username'] = $username;
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$settings['password'] = $password;
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$config->set('b8.database', $settings);
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}
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protected static function init()
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{
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$config = Config::getInstance();
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$settings = $config->get('b8.database', array());
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self::$servers['read'] = $settings['servers']['read'];
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self::$servers['write'] = $settings['servers']['write'];
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self::$details['db'] = $settings['name'];
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self::$details['user'] = $settings['username'];
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self::$details['pass'] = $settings['password'];
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self::$initialised = true;
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}
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/**
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* @param string $type
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*
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* @return \b8\Database
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* @throws \Exception
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*/
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public static function getConnection($type = 'read')
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{
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if (!self::$initialised) {
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self::init();
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}
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// If the connection hasn't been used for 5 minutes, force a reconnection:
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if (!is_null(self::$lastUsed[$type]) && (time() - self::$lastUsed[$type]) > 300) {
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self::$connections[$type] = null;
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}
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if(is_null(self::$connections[$type])) {
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if (is_array(self::$servers[$type])) {
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// Shuffle, so we pick a random server:
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$servers = self::$servers[$type];
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shuffle($servers);
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} else {
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// Only one server was specified
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$servers = array(self::$servers[$type]);
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}
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$connection = null;
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// Loop until we get a working connection:
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while(count($servers))
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{
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// Pull the next server:
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$server = array_shift($servers);
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if (stristr($server, ':')) {
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list($host, $port) = explode(':', $server);
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$server = $host . ';port=' . $port;
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}
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// Try to connect:
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try
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{
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$connection = new self('mysql:host=' . $server . ';dbname=' . self::$details['db'],
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self::$details['user'],
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self::$details['pass'],
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array(
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\PDO::ATTR_PERSISTENT => false,
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\PDO::ATTR_ERRMODE => \PDO::ERRMODE_EXCEPTION,
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\PDO::ATTR_TIMEOUT => 2,
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\PDO::MYSQL_ATTR_INIT_COMMAND => 'SET NAMES \'UTF8\'',
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));
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}
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catch(\PDOException $ex)
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{
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$connection = false;
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}
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// Opened a connection? Break the loop:
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if($connection)
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{
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break;
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}
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}
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// No connection? Oh dear.
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if(!$connection && $type == 'read')
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{
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throw new \Exception('Could not connect to any ' . $type . ' servers.');
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}
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self::$connections[$type] = $connection;
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}
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self::$lastUsed[$type] = time();
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return self::$connections[$type];
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}
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public function getDetails()
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{
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return self::$details;
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}
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public static function reset()
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{
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self::$connections = array('read' => null, 'write' => null);
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self::$lastUsed = array('read' => null, 'write' => null);
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self::$initialised = false;
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}
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}
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