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Posted to issues@beam.apache.org by "Beam JIRA Bot (Jira)" <ji...@apache.org> on 2021/01/12 17:13:03 UTC

[jira] [Updated] (BEAM-3736) Add SetUp() and TearDown() for CombineFns

     [ https://issues.apache.org/jira/browse/BEAM-3736?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Beam JIRA Bot updated BEAM-3736:
--------------------------------
    Labels: stale-P2  (was: )

> Add SetUp() and TearDown() for CombineFns
> -----------------------------------------
>
>                 Key: BEAM-3736
>                 URL: https://issues.apache.org/jira/browse/BEAM-3736
>             Project: Beam
>          Issue Type: Improvement
>          Components: beam-model, sdk-py-core
>            Reporter: Chuan Yu Foo
>            Priority: P2
>              Labels: stale-P2
>          Time Spent: 13h
>  Remaining Estimate: 0h
>
> I have a CombineFn that has a large amount of state that needs to be loaded once before it can add_input or merge_combiners (for example, the CombineFn might load up a large lookup table used for combining). 
> Right now, to initialise this state, for each of the methods, I check if the state has already been initialised, and if not, I initialise it. It would be nice if CombineFn provided a SetUp() method that is called once to initialise this state (and a corresponding TearDown() method to clean up this state if necessary).



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