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Spring Batch Item Reader

Vis Deo
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Joined: Jul 02, 2004
Posts: 41
I want to know if ItemReader and flatfilereader - from spring batch package - does it read line by line data from file or read whole byte stream in memory?

I am trying to read fixed length flat file - large size - may be 30mb+ and extract few fields from each record. For e.g this file has each record that is size of 3000 char/bytes and I am interested in retrieving 2 fields from char position 10-30 and 2090-2100.

Because of large size 30MB+ I would like to read it line by line and creat javaobjects for each record. Therefore I want to know if flatfile reader reads line by line or loads whole file as bytestream in memory.

Saifuddin Merchant
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Joined: Feb 08, 2009
Posts: 607

Reads line by line creating a 'Domain' object for each row - (usually used with the line mapper and tokenizers...)
It might do some internal buffering!!

Cheers - Sam.
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I agree. Here's the link:
subject: Spring Batch Item Reader
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