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https://issues.apache.org/jira/browse/FLINK-7018?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Flink Jira Bot updated FLINK-7018:
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    Labels: pull-request-available stale-assigned  (was: pull-request-available)

> Refactor streamGraph to make interfaces clear
> ---------------------------------------------
>
>                 Key: FLINK-7018
>                 URL: https://issues.apache.org/jira/browse/FLINK-7018
>             Project: Flink
>          Issue Type: Improvement
>          Components: API / DataStream
>            Reporter: Xu Pingyong
>            Assignee: Xu Pingyong
>            Priority: Major
>              Labels: pull-request-available, stale-assigned
>          Time Spent: 0.5h
>  Remaining Estimate: 0h
>
> Motivation:    
>        1. StreamGraph is a graph consisted of some streamNodes. So virtual 
> nodes (such as select, sideOutput, partition) should be moved away from it. 
> Main iterfaces of StreamGraph should be as following:
>         addSource(StreamNode sourceNode)
>         addSink(StreamNode sinkNode)
>        addOperator(StreamNode streamNode)
>        addEdge(Integer upStreamVertexID, Integer downStreamVertexID, 
> StreamEdge.InputOrder inputOrder, StreamPartitioner<?> partitioner, 
> List<String> outputNames, OutputTag outputTag)
>         getJobGraph()
>      2. StreamExecutionEnvironment should not be in StreamGraph, I create 
> StreamGraphProperties which extracts all env information the streamGraph 
> needs from StreamExecutionEnvironment. It contains:
>     1) executionConfig
>     2) checkpointConfig
>     3) timeCharacteristic
>     4) stateBackend
>     5) chainingEnabled
>     6) cachedFiles
>     7) jobName
>     
> Related Changes:
>        I moved the part of dealing with virtual nodes to 
> StreamGraphGenerator. And get properties of StreamGraph from 
> StreamGraphProperties instead of StreamExecutionEnvironment.
>  
>       It is only a code abstraction internally.



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