Refactor of Jet collectors into a new type called Reducer #313
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The `Reducer` is a generalisation of j.u.s `Collector` and models the terminal operation of a stream, and has the responsbility to build the DAG and execute it. The new interface also allows a distinction between j.u.s. Collectors which can be used downstream, and Jet-specific constructs such as `DistributedCollectors.toIMap()` Fixes hazelcast#309
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mtopolnik
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Feb 14, 2017
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The
Reduceris a generalisation of j.u.sCollectorandmodels the terminal operation of a stream, and has the
responsbility to build the DAG and execute it.
The new interface also allows a distinction between j.u.s.
Collectors which can be used downstream, and Jet-specific
constructs such as
DistributedCollectors.toIMap()Fixes #309