protected function validateDirectories()
{
// query whether the container's application directory is available and readable
$appBase = $this->getAppBase();
if (!is_dir($appBase) || !is_readable($appBase)) {
$this->getInitialContext()->getSystemLogger()->critical(sprintf('Base directory (appBase) %s of container %s is no directory or not readable, can\'t deploy applications', $appBase, $this->getName()));
}
// query whether the container's temporary directory is available and readable
$tmpDir = $this->getTmpDir();
if (!is_dir($tmpDir) || !is_readable($tmpDir)) {
$this->getInitialContext()->getSystemLogger()->critical(sprintf('Temporary directory (tmpDir) %s of container %s is no directory or not readable!', $tmpDir, $this->getName()));
}
}