Synchronous read file and status update

Hi,
CSV file to be loaded into the database table. ASP used as front end and ESB should be used for backend processing!
A csv file is placed in a fileshare by an asp page. After that a button is clicked on the asp page which inserts a record into a database table(A) with the file details. There is a flag field in the table which will be set to 'F' initially.
Now there should be an esb service which will be polling for any new records inserted into the database table(A).
Once it finds any new record, the esb service should update the flag status to 'RF' from 'F' and read the records in the csv file(I think synchronous read file should be used inthe file adapter) and insert them into a database table(B). The flag field is updated to 'RF' so that the asp page informs the user that the csv file is being inserted into the table(B).
After all the records are inserted, the esb service should once again update the flag in table(A) to 'Y' from 'RF' so that the asp page will indicate the user that the csv file is loaded into the data base table.
The challenges that I have here are:
1) I need to have the ESB service with such a sequence of execution that updates the table(A) at each stage so that the asp page can display the status to the USER.
2) The csv file size can be huge. It can contain as many as 100 thousand records with over 50 fields in each record. I will have to probably debatch the file. Once we debatch, seperate instance would be created for each batch. Now we should see to that flag in table(A) is updated to 'Y' only when the last batch of the records are processed.
I am using jdev10134 and oracle SOA suite ESB10134
Someone please advice on how to go ahead.
Cheers,
RV

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