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https://issues.apache.org/jira/browse/FLINK-3133?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15045166#comment-15045166
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Stephan Ewen commented on FLINK-3133:
-------------------------------------
Two comments:
- Let's find a different name than "ResultQueryable"
- Rather than retrieving a sampled list, getting an {{Iterator}} over the
result stream seems quite natural.
There is an approximation to the fetching code in streaming contrib.
> Introduce collect()/coun()/print() methods in DataStream API
> ------------------------------------------------------------
>
> Key: FLINK-3133
> URL: https://issues.apache.org/jira/browse/FLINK-3133
> Project: Flink
> Issue Type: Improvement
> Components: DataStream API, Streaming
> Affects Versions: 0.10.0, 1.0.0, 0.10.1
> Reporter: Maximilian Michels
> Fix For: 1.0.0
>
>
> The DataSet API's methods {{collect()}}, {{count()}}, and {{print()}} should
> be mirrored to the DataStream API.
> The semantics of the calls are different. We need to be able to sample parts
> of a stream, e.g. by supplying a time period in the arguments to the methods.
> Collect/count/print should be lazily evaluated. Users should use the
> {{StreamEnvironment}} to retrieve the results.
> {code:java}
> StreamExecutionEnvironment env =
> StramEnvironment.getStreamExecutionEnvironment();
> DataStream<Integer> printSink = env.addSource(..).print();
> ResultQueryable queryObject = env.executeWithResultQueryable();
> List<Integer> sampled = queryObject.retrieve(printSink, Time.seconds(5));
> {code}
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