Itemreader read method while dealing with collections

[janapati.siva]

Hi,

I have created custom item reader by implementing the ItemReader interface.
From the read method i am calling a business method which will return collection of items.

public Product read () {

// calling business method ,returns a list of products.

}

According to the commit-interval , how can we return items from reader to writer.

let say , the list contains 100 products and the commit interval is 10.

So , i need to return bunch of 10 products to the item writer.

How we can achieve this?

Regards,
Siva

[Dave Syer]

ItemReader<Product> returns a Product (singular) from its read() method. If you can only read them as a collection you can either use ItemReader<Collection<Product>> or you can buffer them inside the reader (and if you do the latter either forget about restartability, or implement ItemStream to count the items and re-position on restart).