Github user uce commented on a diff in the pull request:
https://github.com/apache/flink/pull/3438#discussion_r104399614
--- 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 --
Makes sense to keep it like that. The benefits to base the Scala API on top
of the Java API instead of duplicating it are very persuasive, too. ð So +1
to keep it as is. ð I was just wondering whether users would be confused by
this.
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