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Posted to issues@flink.apache.org by "Chesnay Schepler (JIRA)" <ji...@apache.org> on 2018/08/13 07:51:02 UTC
[jira] [Updated] (FLINK-3133) Introduce collect()/count()/print()
methods in DataStream API
[ https://issues.apache.org/jira/browse/FLINK-3133?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Chesnay Schepler updated FLINK-3133:
------------------------------------
Fix Version/s: (was: 1.0.0)
> Introduce collect()/count()/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
> Affects Versions: 0.10.0, 0.10.1, 1.0.0
> Reporter: Maximilian Michels
> Assignee: Evgeny Kincharov
> Priority: Major
>
> 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. Users should use the {{JobClient}} to retrieve the results.
> {code:java}
> StreamExecutionEnvironment env = StramEnvironment.getStreamExecutionEnvironment();
> DataStream<DataType> streamData = env.addSource(..).map(..);
> JobClient jobClient = env.executeWithControl();
> Iterable<DataType> sampled = jobClient.sampleStream(streamData, Time.seconds(5));
> {code}
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