[GitHub] [beam] kennknowles opened a new issue, #18083: Simple pattern for per-bundle and per-DoFn Closeable resources

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

kennknowles opened a new issue, #18083:
URL: https://github.com/apache/beam/issues/18083

   Dealing with Closeable resources inside a processElement call is easy: simply use try-with-resources.
   
   However, bundle- or DoFn-scoped resources, such as long-lived database connections, are less convenient to deal with: you have to open them in startBundle and conditionally close in finishBundle (likewise setup/teardown), taking special care if there's multiple resources to close all of them.
   
   Perhaps we should provide something like Guava's Closer to DoFn's https://github.com/google/guava/wiki/ClosingResourcesExplained. Ideally, the user would need to only write a startBundle() or setup() method, but not write finishBundle() or teardown() - resources would be closed automatically.
   
   Imported from Jira [BEAM-702](https://issues.apache.org/jira/browse/BEAM-702). Original Jira may contain additional context.
   Reported by: jkff.


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