/**
* 连接数据库
*
* @param string $dbFlag 数据库配置命名空间
*/
public static function instance($dbFlag = '')
{
if (empty($dbFlag)) {
throw new DbException('Empty param: dbFlag');
}
if (!isset(Y::$app->db[$dbFlag])) {
throw new InvalidConfigException('Unknow db config: ' . $dbFlag);
}
if (!isset(static::$_links[$dbFlag]) || null === static::$_links[$dbFlag]) {
$config = Y::$app->db[$dbFlag];
$dsn = $config['dsn'];
$driver = static::getDriverName($dsn);
$dbClass = static::$_dbNamespace . '\\' . $driver . '\\Db';
$dbFile = Y::namespaceTranslate($dbClass);
if (!is_file($dbFile)) {
throw new FileNotFoundException('The Classfile: ' . $dbFile . ' not found');
}
try {
static::$_links[$dbFlag] = new $dbClass($dsn, $config['username'], $config['password']);
static::$_links[$dbFlag]->initConnection($config);
} catch (PDOException $e) {
static::$_links[$dbFlag] = null;
throw new DbException('Failed to connect to database');
}
}
return static::$_links[$dbFlag];
}
/**
* 得到视图所在路径
*
* @return string 视图路径
*/
public function findViewFile($view)
{
$app = Y::$app;
$path = '';
if (null !== $app->moduleId) {
$path = Y::namespaceTranslate($app->modules[$app->moduleId], '');
} else {
$path = Y::namespaceTranslate('app', '');
}
// 模块无子目录 普通控制器有子目录
// 注意转换 namespace path 为目录路径
return $path . '/views/' . (null === $app->routePrefix ? '.' : str_replace('\\', '/', $app->routePrefix)) . '/' . $view . $this->defaultExtension;
}
public static function instance($cacheFlag = '')
{
if (empty($cacheFlag)) {
throw new CacheException('Empty param: cacheFlag');
}
if (!isset(Y::$app->cache[$cacheFlag])) {
throw new InvalidConfigException('Unknow cache config: ' . $cacheFlag);
}
if (!isset(Y::$app->cache[$cacheFlag]['class'])) {
throw new InvalidConfigException('Lost `class` config item of the cache class');
}
if (!isset(static::$_caches[$cacheFlag]) || null === static::$_caches[$cacheFlag]) {
$config = Y::$app->cache[$cacheFlag];
$cacheClass = $config['class'];
$cacheFile = Y::namespaceTranslate($cacheClass);
if (!is_file($cacheFile)) {
throw new FileNotFoundException('The cacheFile: ' . $cacheFile . ' not found');
}
static::$_caches[$cacheFlag] = new $cacheClass($config);
static::$_caches[$cacheFlag]->init();
}
return static::$_caches[$cacheFlag];
}
