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https://issues.apache.org/jira/browse/FLINK-9850?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16581006#comment-16581006
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ASF GitHub Bot commented on FLINK-9850:
---------------------------------------
zentol commented on a change in pull request #6367: [FLINK-9850] Add a string
to the print method to identify output for DataStream
URL: https://github.com/apache/flink/pull/6367#discussion_r210252151
##########
File path:
flink-streaming-scala/src/main/scala/org/apache/flink/streaming/api/scala/DataStream.scala
##########
@@ -959,6 +959,29 @@ class DataStream[T](stream: JavaStream[T]) {
@PublicEvolving
def printToErr() = stream.printToErr()
+ /**
+ * Writes a DataStream to the standard output stream (stdout). For each
+ * element of the DataStream the result of [[AnyRef.toString()]] is
+ * written.
+ *
+ * @param sinkIdentifier The string to prefix the output with.
+ * @return The closed DataStream.
+ */
+ @PublicEvolving
+ def print(sinkIdentifier: String): DataStreamSink[T] =
stream.print(sinkIdentifier)
Review comment:
these are not tested
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> Add a string to the print method to identify output for DataStream
> ------------------------------------------------------------------
>
> Key: FLINK-9850
> URL: https://issues.apache.org/jira/browse/FLINK-9850
> Project: Flink
> Issue Type: New Feature
> Components: DataStream API
> Reporter: Hequn Cheng
> Assignee: vinoyang
> Priority: Major
> Labels: pull-request-available
>
> The output of the print method of {[DataSet}} allows the user to supply a
> String to identify the output(see
> [FLINK-1486|https://issues.apache.org/jira/browse/FLINK-1486]). But
> {[DataStream}} doesn't support now. It is valuable to add this feature for
> {{DataStream}}
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