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https://issues.apache.org/jira/browse/FLINK-5026?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15701731#comment-15701731
]
ASF GitHub Bot commented on FLINK-5026:
---------------------------------------
Github user kl0u commented on a diff in the pull request:
https://github.com/apache/flink/pull/2788#discussion_r89759912
--- Diff:
flink-streaming-java/src/main/java/org/apache/flink/streaming/api/datastream/KeyedStream.java
---
@@ -173,67 +174,67 @@ public KeyedStream(DataStream<T> dataStream,
KeySelector<T, KEY> keySelector, Ty
}
/**
- * Applies the given {@link TimelyFlatMapFunction} on the input stream,
thereby
+ * Applies the given {@link ProcessFunction} on the input stream,
thereby
* creating a transformed output stream.
*
* <p>The function will be called for every element in the stream and
can produce
* zero or more output. The function can also query the time and set
timers. When
* reacting to the firing of set timers the function can emit yet more
elements.
*
- * <p>A {@link
org.apache.flink.streaming.api.functions.RichTimelyFlatMapFunction}
+ * <p>A {@link RichProcessFunction}
* can be used to gain access to features provided by the
* {@link org.apache.flink.api.common.functions.RichFunction} interface.
*
- * @param flatMapper The {@link TimelyFlatMapFunction} that is called
for each element
+ * @param processFunction The {@link ProcessFunction} that is called
for each element
* in the stream.
*
- * @param <R> The of elements emitted by the {@code
TimelyFlatMapFunction}.
+ * @param <R> The of elements emitted by the {@code ProcessFunction}.
*
* @return The transformed {@link DataStream}.
*/
- public <R> SingleOutputStreamOperator<R>
flatMap(TimelyFlatMapFunction<T, R> flatMapper) {
+ public <R> SingleOutputStreamOperator<R> process(ProcessFunction<T, R>
processFunction) {
TypeInformation<R> outType =
TypeExtractor.getUnaryOperatorReturnType(
- flatMapper,
- TimelyFlatMapFunction.class,
+ processFunction,
+ ProcessFunction.class,
false,
true,
getType(),
Utils.getCallLocationName(),
true);
- return flatMap(flatMapper, outType);
+ return process(processFunction, outType);
}
/**
- * Applies the given {@link TimelyFlatMapFunction} on the input stream,
thereby
+ * Applies the given {@link ProcessFunction} on the input stream,
thereby
* creating a transformed output stream.
*
* <p>The function will be called for every element in the stream and
can produce
* zero or more output. The function can also query the time and set
timers. When
* reacting to the firing of set timers the function can emit yet more
elements.
*
--- End diff --
<p>The function will be called for every element in the input streams and
can produce zero or more
* output elements. Contrary to the {@link #flatMap(FlatMapFunction)}
function, this function can also
* query the time and set timers. When reacting to the firing of set
timers the function can directly
* emit elements and/or register yet more timers.
*
> Rename TimelyFlatMap to Process
> -------------------------------
>
> Key: FLINK-5026
> URL: https://issues.apache.org/jira/browse/FLINK-5026
> Project: Flink
> Issue Type: Improvement
> Components: Streaming
> Reporter: Aljoscha Krettek
> Assignee: Aljoscha Krettek
> Fix For: 1.2.0
>
>
> The method on {{KeyedDataStream}} would be called {{process()}} and the
> function itself would be called {{ProcessFunction}}.
> The reason for this is that {{TimelyFlatMapFunction}} is a bit of a mouthful
> and with the additions to the timer API and state the {{ProcessFunction}}
> could become the basic, low-level, user-facing API for cases where users
> nowadays implement their own operator.
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