Github user uce commented on a diff in the pull request:
https://github.com/apache/flink/pull/3438#discussion_r104377167
--- Diff:
flink-streaming-java/src/main/java/org/apache/flink/streaming/api/datastream/DataStream.java
---
@@ -556,6 +558,60 @@ public ExecutionConfig getExecutionConfig() {
}
/**
+ * 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 input
streams and can produce zero
+ * or more output elements.
+ *
+ * @param processFunction The {@link ProcessFunction} that is called
for each element
+ * in the stream.
+ *
+ * @param <R> The type of elements emitted by the {@code
ProcessFunction}.
+ *
+ * @return The transformed {@link DataStream}.
+ */
+ @PublicEvolving
+ public <R> SingleOutputStreamOperator<R> process(ProcessFunction<T, R>
processFunction) {
+
+ TypeInformation<R> outType =
TypeExtractor.getUnaryOperatorReturnType(
+ processFunction,
+ ProcessFunction.class,
+ false,
+ true,
+ getType(),
+ Utils.getCallLocationName(),
+ true);
+
+ return process(processFunction, outType);
+ }
+
+ /**
+ * 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 input
streams and can produce zero
+ * or more output elements.
+ *
+ * @param processFunction The {@link ProcessFunction} that is called
for each element
+ * in the stream.
+ * @param outputType {@link TypeInformation} for the result type of the
function.
+ *
+ * @param <R> The type of elements emitted by the {@code
ProcessFunction}.
+ *
+ * @return The transformed {@link DataStream}.
+ */
+ @Internal
+ public <R> SingleOutputStreamOperator<R> process(
--- End diff --
Is this internal method only exposed as `public` for the Scala API? If yes,
I'm wondering if it makes sense to call `transform` manually in the Scala
`DataStream` API.
---
If your project is set up for it, you can reply to this email and have your
reply appear on GitHub as well. If your project does not have this feature
enabled and wishes so, or if the feature is enabled but not working, please
contact infrastructure at [email protected] or file a JIRA ticket
with INFRA.
---
