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https://issues.apache.org/jira/browse/BEAM-1705?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Xu Mingmin updated BEAM-1705:
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Priority: Minor (was: Major)
> add method in Pipeline to visualize the DAG
> -------------------------------------------
>
> Key: BEAM-1705
> URL: https://issues.apache.org/jira/browse/BEAM-1705
> Project: Beam
> Issue Type: New Feature
> Components: sdk-java-core
> Reporter: Xu Mingmin
> Assignee: Xu Mingmin
> Priority: Minor
>
> add a method to print out Pipeline with a easy-to-read format.
> Take WindowedWordCount.Java for example, the output could looks like:
> {code}
> 1. TextIO.Read/Read.out [PCollection]}]
> 2. ParDo(AddTimestamp).out [PCollection]}]
> 3. Window.Into()/Window.Assign.out [PCollection]}]
> 4. WordCount.CountWords/ParDo(ExtractWords).out [PCollection]}]
> 5. WordCount.CountWords/Count.PerElement/Init/Map.out [PCollection]}]
> 6.
> WordCount.CountWords/Count.PerElement/Combine.perKey(Count)/GroupByKey.out
> [PCollection]}]
> 7.
> WordCount.CountWords/Count.PerElement/Combine.perKey(Count)/Combine.GroupedValues/ParDo(Anonymous).out
> [PCollection]}]
> 8. ParDo(Anonymous).out [PCollection]}]
> 9. GroupByKey.out [PCollection]}]
> 10. ParDo(WriteWindowedFiles).out [PCollection]}]
> {code}
> Add the serial numbers here so it's readable for a complex pipeline with
> multiple-in and multiple-out.
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