code: public Future<PutItemResult> putItemAsync(
              final PutItemRequest putItemRequest,
              final AsyncHandler<PutItemRequest, PutItemResult> asyncHandler)
                      throws AmazonServiceException, AmazonClientException {
          return executorService.submit(new Callable<PutItemResult>() {
              public PutItemResult call() throws Exception {
              	PutItemResult result;
                  try {
              		result = putItem(putItemRequest);
              	} catch (Exception ex) {
              	    asyncHandler.onError(ex);
      				throw ex;
              	}
              	asyncHandler.onSuccess(putItemRequest, result);
                 	return result;
  		    }
  		});
      }
docs: <p>
  Creates a new item, or replaces an old item with a new item (including
  all the attributes).
  </p>
  <p>
  If an item already exists in the specified table with the same primary
  key, the new item completely replaces the existing item. You can
  perform a conditional put (insert a new item if one with the specified
  primary key doesn't exist), or replace an existing item if it has
  certain attribute values.
  </p>
  
  @param putItemRequest Container for the necessary parameters to
  execute the PutItem operation on AmazonDynamoDB.
  @param asyncHandler Asynchronous callback handler for events in the
  life-cycle of the request. Users could provide the implementation of
  the four callback methods in this interface to process the operation
  result or handle the exception.
  
  @return A Java Future object containing the response from the PutItem
  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.