throws AmazonServiceException, AmazonClientException {
ExecutionContext executionContext = createExecutionContext(getItemRequest);
Request<GetItemRequest> request = marshall(getItemRequest,
new GetItemRequestMarshaller(),
executionContext.getAwsRequestMetrics());
Unmarshaller<GetItemResult, JsonUnmarshallerContext> unmarshaller = new GetItemResultJsonUnmarshaller();
JsonResponseHandler<GetItemResult> responseHandler = new JsonResponseHandler<GetItemResult>(unmarshaller);
return invoke(request, responseHandler, executionContext);
}