Resume Reading feature

Hi there,
I'm trying to get a better understanding of the data streaming features that comes with the -hot forum topic- Batch eWay in caps 513. Its User Guide has a page on the "Resume Reading" feature of the BatchLocalFile OTD. It allows to read part by part from a large file and does this by remembering the break position in the file, so it knows where to start for reading the next part.
- How does this got persisted? I guess it's just in memory.
- What about a system failure during the read? Is there a kind of rollback mechanism foreseen?
- collaboration rules define the break (identified by i.e. #recs, delimiter character), not by configuration. How?
Anyone has experience with this feature ?
Some code snippets would be very usefull.
Thanks 4 any help on this
Kris

Hoi Kris,
it works together with the Record parsers (BatchRecord OTD).
The state is written to a file on the side of the domain. As it is meant to work in scenario as LocalFile-BatchRecord-BatchFTP or LocalFile-BatchRecord-JMS, the built-in features of Pre and Post transfer renaming give a pretty good transactional control.
The thing to make sure is having synchronization enabled so execution is serialized. Also, when adding more logic on top of the BatchRecord features, it is suggested to set "Resume Reading" to false, which just means that it's not going to work perfectly in this situation (if you for example do double splitting on the input datastream and send them off as JMS messages).
Hope this clarifies things a bit.
Paul

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