code: public Future<QueryResult> queryAsync(final QueryRequest queryRequest) 
              throws AmazonServiceException, AmazonClientException {
          return executorService.submit(new Callable<QueryResult>() {
              public QueryResult call() throws Exception {
                  return query(queryRequest);
  		    }
  		});
      }
docs: <p>
  Gets the values of one or more items and its attributes by primary key
  (composite primary key, only).
  </p>
  <p>
  Narrow the scope of the query using comparison operators on the
  <code>RangeKeyValue</code> of the composite key. Use the
  <code>ScanIndexForward</code> parameter to get results in forward or
  reverse order by range key.
  </p>
  
  @param queryRequest Container for the necessary parameters to execute
  the Query operation on AmazonDynamoDB.
  
  @return A Java Future object containing the response from the Query
  service method, as returned by AmazonDynamoDB.
  
  @throws AmazonClientException
  If any internal errors are encountered inside the client while
  attempting to make the request or handle the response.  For example
  if a network connection is not available.
  @throws AmazonServiceException
  If an error response is returned by AmazonDynamoDB indicating
  either a problem with the data in the request, or a server side issue.