protected function getFileName()
    {
        if (null === $this->fileName) {
            $this->fileName = $this->lockDirectory.'/'.$this->applicationName.'.pid';
        }

        return $this->fileName;
    }
protected function getFileName()
    {
        if (null === $this->fileName) {
            $this->fileName = $this->lockDirectory.'/'.$this->applicationName.'.pid';
        }

        return $this->fileName;
    }
protected function getFileName ( ) { if ( null === $ this -> fileName ) { $ this -> fileName = $ this -> lockDirectory . '/' . $ this -> applicationName . '.pid' ; } return $ this -> fileName ; }
Returns the Pidfile filename.

@return string
Returns the Pidfile filename .