[GitHub] [beam] damccorm opened a new issue, #21329: Add "Write.withResults()" for all Java SDK IOs

[GitBox <gi...@apache.org>]

damccorm opened a new issue, #21329:
URL: https://github.com/apache/beam/issues/21329

   Currently, by default, a "Write" transform is considered as a final `PTransform` in a pipeline and it returns `PDone` that can't be used later for next pipeline stages. 
   
   Though, sometimes it's needed to use the results of write operation as input `PCollection` downstream of pipeline and some IOs already support this. For example, `JdbcIO.Write` has the methods `withResults()` and `withWriteResults()` that returns a `PTransform` with output `PCollection<>` of write results and it can be used to analyse the results or, along with `Wait` transform, to write into the second database only if writes into the first one were finished, like this:
   
   ```
   
   PCollection<Void> firstWriteResults = data.apply(JdbcIO.write()
        .withDataSourceConfiguration(CONF_DB_1).withResults());
   data.apply(Wait.on(firstWriteResults))
   
       .apply(JdbcIO.write().withDataSourceConfiguration(CONF_DB_2));
   
   ```
   
   
   So, it would be useful to add a `WriteWithResults` transform for other IOs that can be used in the same way.
   
   Imported from Jira [BEAM-13584](https://issues.apache.org/jira/browse/BEAM-13584). Original Jira may contain additional context.
   Reported by: aromanenko.


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[GitHub] [beam] damccorm commented on issue #21329: Add "Write.withResults()" for all Java SDK IOs

[GitBox <gi...@apache.org>]

damccorm commented on issue #21329:
URL: https://github.com/apache/beam/issues/21329#issuecomment-1146696304

   The following subtask(s) are associated with this issue: #21330


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