[flink] Adopt open(OpenContext) in RichFunction #4581
Merged
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Purpose
Linked issue: #4442
This PR avoids deprecated usage on
RichFunction#open(Configuration)
, and turn toRichFunction#open(OpenContext)
.Tests
Existing test cases are used to verify this change.
API and Format
This change does not affect API or storage format.
Documentation
This change does not affect introduce a new feature.