Chuan Yu Foo created BEAM-3736:
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Summary: Add SetUp() and TearDown() for CombineFns
Key: BEAM-3736
URL: https://issues.apache.org/jira/browse/BEAM-3736
Project: Beam
Issue Type: Improvement
Components: sdk-py-core
Reporter: Chuan Yu Foo
Assignee: Ahmet Altay
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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