EmbeddedServer::isInstalled PHP Method

    function isInstalled()
    {
        // Check solr installation.
        $solrWar = $this->_getPluginDirectory() . DIRECTORY_SEPARATOR . 'embedded' . DIRECTORY_SEPARATOR . 'webapps' . DIRECTORY_SEPARATOR . 'solr.war';
        if (!is_readable($solrWar)) {
            return false;
        }
        // Check jetty installation.
        $jettyJar = $this->_getPluginDirectory() . DIRECTORY_SEPARATOR . 'lib' . DIRECTORY_SEPARATOR . 'jetty' . DIRECTORY_SEPARATOR . 'start.jar';
        if (!is_readable($jettyJar)) {
            return false;
        }
        return true;
    }