Yii command to clear assets

ClearAssetsCommand.php

<?php
/**
 * Clear assets Command
 *
 * Deletes all published assets.
 *
 * Usage:
 * yiic clearassets
 *
 * @author Alexander Makarov
 */
class ClearAssetsCommand extends CConsoleCommand {
    /**
     * Executes the command.
     * @param array command line parameters for this command.
     */
    public function run($args)
    {
        $path =  Yii::app()->getAssetManager()->getBasePath();
        $di = new DirectoryIterator($path);
        foreach($di as $d)
        {
            if(!$d->isDot())
            {
                echo "Removed ".$d->getPathname()."\n";
                $this->removeDirRecursive($d->getPathname());
            }
        }

        echo "Done.\n";
    }

    function removeDirRecursive($dir)
    {
        $files = glob($dir.'*', GLOB_MARK);
        foreach ($files as $file)
        {
            if (is_dir($file)){
                $this->removeDirRecursive($file);
            }
            else {
                unlink($file);
            }
        }

        if (is_dir($dir)) rmdir($dir);
    }
}

exception 'CException' with message 'CConsoleApplication and its behaviors do not have a method
or closure named "getAssetManager"

$path = '../assets/'; //Yii::app()->getAssetManager()->getBasePath();
that`s work!