256             return $this->_runtimePath; 

257         } 

258     } 

259260     /** 

261      * Sets the directory that stores runtime files. 

262      * @param string $path the directory that stores runtime files. 

263      * @throws CException if the directory does not exist or is not writable 

264      */ 

265     public function setRuntimePath($path) 

266     { 

267         if(($runtimePath=realpath($path))===false || !is_dir($runtimePath) || !is_writable($runtimePath)) 

268             throw new CException(Yii::t('yii','Application runtime path "{path}" is not valid. Please make sure it is a directory writable by the Web server process.', 

269                 array('{path}'=>$path))); 

270         $this->_runtimePath=$runtimePath; 

271     } 

272273     /** 

274      * Returns the root directory that holds all third-party extensions. 

275      * @return string the directory that contains all extensions. Defaults to the 'extensions' directory under 'protected'. 

276      */ 

277     public function getExtensionPath() 

278     { 

279         return Yii::getPathOfAlias('ext'); 

280     }