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There are cases where we would like to split a Stetl ETL Chain: for example to publish converted data to both a database and a CSV file or some or multiple web API(s). Most ETL frameworks provide a Splitter (and a Combiner or Merger, which is also handy but trickier and less required).
This could be built into to internal Stetl base classes. This would require a change in the
Simplest case is
Splitting into sub-Chains at
to split the output of
Combining could use similar notation:
Or even splitting + combining:
Another option is a specialized
In first instance, simple Chain splitting will be provided with this issue. A Combining implementation will be done in a separate issue.