An interface for performing possibly distributed, commutative, associative combines (such as sum) to a set of values (e.g. in groupBy(...).combining(...).
groupBy(...).combining(...)
Several implementations (such as summation) are provided in the combiners module.
See also https://beam.apache.org/documentation/programming-guide/#transforms
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An interface for performing possibly distributed, commutative, associative combines (such as sum) to a set of values (e.g. in
groupBy(...).combining(...).Several implementations (such as summation) are provided in the combiners module.
See also https://beam.apache.org/documentation/programming-guide/#transforms