synchronized(requests) { entry=(RequestEntry)requests.get(id_obj); }
entry=(RequestEntry)requests.get(id_obj);
    private RspCollector findEntry(long id) {        Long id_obj = new Long(id);        RequestEntry entry;        synchronized(requests) {            entry=(RequestEntry)requests.get(id_obj);        }        return((entry != null)? entry.coll:null);    }