How to use

AuthHandler

in

org.eclipse.hono.service.auth.device

private Future<DeviceUser> authenticate(final MqttContext connectContext, final Span currentSpan) {
  return authHandler.authenticateDevice(connectContext);
}

  private void parseCredentials(
      final int idx,
      final T context,
      final Throwable lastException,
      final Handler<AsyncResult<JsonObject>> resultHandler) {

    if (idx >= handlerChain.size()) {

      // no providers left to try to extract credentials
      resultHandler.handle(Future.failedFuture(lastException));

    } else {

      final AuthHandler<T> handler = handlerChain.get(idx);
      handler.parseCredentials(context).setHandler(r -> {

        if (r.failed()) {
          parseCredentials(idx + 1, context, r.cause(), resultHandler);
        } else {
          context.put(AUTH_PROVIDER_CONTEXT_KEY, handler.getAuthProvider());
          resultHandler.handle(Future.succeededFuture(r.result()));
        }
      });
    }
  }
}