• Post Reply Bookmark Topic Watch Topic
  • New Topic
programming forums Java Mobile Certification Databases Caching Books Engineering Micro Controllers OS Languages Paradigms IDEs Build Tools Frameworks Application Servers Open Source This Site Careers Other Pie Elite all forums
this forum made possible by our volunteer staff, including ...
Marshals:
  • Campbell Ritchie
  • Jeanne Boyarsky
  • Ron McLeod
  • Liutauras Vilda
  • Paul Clapham
Sheriffs:
  • paul wheaton
  • Tim Cooke
  • Henry Wong
Saloon Keepers:
  • Stephan van Hulst
  • Tim Holloway
  • Carey Brown
  • Frits Walraven
  • Piet Souris
Bartenders:
  • Mike London

Spring Batch Item Reader

 
Ranch Hand
Posts: 41
  • Mark post as helpful
  • send pies
    Number of slices to send:
    Optional 'thank-you' note:
  • Quote
  • Report post to moderator
Hi,
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.

Thanks,
 
Ranch Hand
Posts: 608
Firefox Browser Spring Java
  • Mark post as helpful
  • send pies
    Number of slices to send:
    Optional 'thank-you' note:
  • Quote
  • Report post to moderator
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!!
reply
    Bookmark Topic Watch Topic
  • New Topic