[jira] [Created] (FLINK-9299) ProcessWindowFunction documentation Java examples have errors

["Ken Krugler (JIRA)" <ji...@apache.org>]

Ken Krugler created FLINK-9299:
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             Summary: ProcessWindowFunction documentation Java examples have errors
                 Key: FLINK-9299
                 URL: https://issues.apache.org/jira/browse/FLINK-9299
             Project: Flink
          Issue Type: Bug
          Components: Documentation
    Affects Versions: 1.4.2
            Reporter: Ken Krugler


In looking at [https://ci.apache.org/projects/flink/flink-docs-release-1.4/dev/stream/operators/windows.html#processwindowfunction-with-incremental-aggregation], I noticed a few errors...
 * "This allows to incrementally compute windows" should be "This allows it to incrementally compute windows"
 * DataStream<Tuple2<String, Long> input = ...; should be DataStream<Tuple2<String, Long>> input = ...;
 * The getResult() method needs to cast one of the accumulator values to a double, if that's what it is going to return.
 * MyProcessWindowFunction needs to extend, not implement ProcessWindowFunction
 * MyProcessWindowFunction needs to implement a process() method, not an apply() method.
 * The call to .timeWindow takes a Time parameter, not a window assigner.

 



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