Where/How to plug a gzip stage afterwards ?

[Akamanouche]

Hi,

I need to gzip files which have been generated by a customized ItemWriter, in a previous step.
All the new generated files (XML ones) would be gathered and gzipped.

Where and how do you think i could plug this ? In a new next step ?
Is there any concept of ItemReader on a directory, where a so-called item would be a file ?
(and so potentially harness the retry feature)

Thanks in advance

[bruce.szalwinski]

The FlatFileItemReader exposes a buffereredReaderFactory which makes it easy to plugin a GZip Reader. But the FlatFileItemWriter isn't as kind. I think this is because the writer wants to preserve state information, so it implements a TransactionAwareBufferedWriter, https://github.com/SpringSource/spri...temWriter.java. Seems like the best bet would be to implement a Tasklet that knows how to compress the output of the previous step.

[mminella]

We actually have a Jira issue open for this very use case: https://jira.springsource.org/browse/BATCH-1750

We'd love any contributions anyone is willing to offer on this!