/**
* 配置初始化函数
* @param $conf array 配置项如下：
* guid_db 可选
* guid_table 可选
* splits 可选
* log_func 可选
* test_mode 可选
* db_pool=>array(
* 'db11'=>array(
* 'ip'=>'ip',
* 'port'=>3306,
* 'user'=>'user',
* 'pass'=>'pass',
* 'charset'=>'charset'
* ),
* 'db2'=>xxx
* ....
* ),
* 'dbs'=>array(
* 'dbname'=>'db1',
* 'dbname'=>array('master'=>'db1','slave'=>array('db2','db3'))
* )
* @throws \Exception
*/
static function init($conf)
{
//check db conf format
foreach ($conf['dbs'] as $db => $dbconf) {
if (is_string($dbconf)) {
if (!isset($conf['db_pool'][$dbconf])) {
throw new \Exception('db.ConfError ' . $dbconf . ' no such pool in db_pool');
}
} else {
if (!isset($dbconf['master']) || !isset($dbconf['slave'])) {
throw new \Exception('db.ConfError missing master|slave conf ' . $db);
}
$master = $dbconf['master'];
$slaves = $dbconf['slave'];
if (!isset($conf['db_pool'][$master])) {
throw new \Exception('db.ConfError ' . $master . ' no such pool in db_pool');
}
foreach ($slaves as $slave) {
if (!isset($conf['db_pool'][$slave])) {
throw new \Exception('db.ConfError ' . $slave . ' no such pool in db_pool');
}
}
}
}
DbContext::$db_pool = $conf['db_pool'];
DBContext::$dbconf = $conf['dbs'];
DbContext::$guidDB = empty($conf['guid_db']) ? null : $conf['guid_db'];
DbContext::$guidTable = empty($conf['guid_table']) ? null : $conf['guid_table'];
DbContext::$defaultDB = empty($conf['default_db']) ? null : $conf['default_db'];
//转换成小写的，免得因为大小写问题比较不成功
DbContext::$splits = empty($conf['splits']) ? array() : $conf['splits'];
DbContext::$logFunc = empty($conf['log_func']) ? null : $conf['log_func'];
DbContext::$testMode = !empty($conf['test_mode']);
DbContext::$longQueryTime = empty($conf['long_query_time']) ? 0 : $conf['long_query_time'];
}
/**
* Create a database connexion if none exists
*/
private static function getConnection($parameters)
{
if (!self::$conf_loaded) {
// @TODO : find a better way to include conf without define DC_RC_PATH
define('DC_RC_PATH', $parameters['config_file']);
include $parameters['config_file'];
self::$conf_loaded = true;
self::$prefix = DC_DBPREFIX;
self::$session_name = DC_SESSION_NAME;
self::$con = \dbLayer::init(DC_DBDRIVER, DC_DBHOST, DC_DBNAME, DC_DBUSER, DC_DBPASSWORD, DC_DBPERSIST);
}
}
