Code example for ConcurrentMap

Methods: getremove

  public void unregister(final String service)
  {"Unregistering chat handler[%s]", service);
    final ChatHandler handler = handlers.get(service);
    if (handler == null) {
      log.warn("handler[%s] not currently registered, ignoring.", service);
    try { 
    catch (Exception e) {
      log.warn(e, "Failed to unregister service[%s]", service);
    handlers.remove(service, handler);
  public Optional<ChatHandler> get(final String key)
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