private boolean recoverRequest(Request request) {

        if (request.site == null) {
            System.out.println("error: recovery request have no site");
            return false;
        }

        if (request.site != null)
            if (!this.siteMap.containsKey(request.site)) {
                System.out.println("error: recovery request site ["
                        + request.site + "] does not exists");
                return false;
            }

        if (this.siteMap.get(request.site).isRunning()) {
            System.out.println("error: recovery request site [" + request.site
                    + "] is running");
            return false;
        }

        this.siteMap.get(request.site).recover();
        return true;
    }