CSV upload via Integration

Hi,

I want to upload CSV file to OTM using integration, But the issue out here is OTM supports on Insert(I) operation but does not support Insert Update (IU) operation.

I am thinking of using Java Integration API's. The sample code in Data Management Guide is

Will this work for huge data.
Is there a way i prepare the CSV file and copy into a Oracel Advanced Queue and OTM automatically picks from queue and process the CSV file.

Has any one used CsvUtilServlet to upload CSV file to OTM. Please mention advantage of this.

Regards
Ravi Gurujala