yuanyangwu commented on a change in pull request #7175:
[FLINK-11004][Documentation] wrong ProcessWindowFunction.process argument in
window document
URL: https://github.com/apache/flink/pull/7175#discussion_r236528195
##########
File path: docs/dev/stream/operators/windows.md
##########
@@ -836,12 +836,12 @@ input
.reduce(
(r1: SensorReading, r2: SensorReading) => { if (r1.value > r2.value) r2
else r1 },
( key: String,
- window: TimeWindow,
+ context: Context,
Review comment:
Thanks for the quick review.
"Context" only is enough because both JAVA and Scala can inspect right
Context.
Here are scala and java examples from flink code.
https://github.com/apache/flink/blob/master/flink-streaming-scala/src/test/scala/org/apache/flink/streaming/api/scala/SideOutputITCase.scala#L213
```scala
val windowOperator = dataStream
.assignTimestampsAndWatermarks(new TestAssigner)
.keyBy(i => i._1)
.window(TumblingEventTimeWindows.of(Time.milliseconds(1)))
.sideOutputLateData(lateDataTag)
.process(new ProcessWindowFunction[(String, Int), String, String,
TimeWindow] {
override def process(
key:String,
context: Context,
elements: Iterable[(String, Int)],
out: Collector[String]): Unit = {
for (in <- elements) {
out.collect(in._1)
}
}
})
```
https://github.com/apache/flink/blob/master/flink-tests/src/test/java/org/apache/flink/test/streaming/runtime/SideOutputITCase.java#L756
```java
SingleOutputStreamOperator<Integer> windowOperator = dataStream
.assignTimestampsAndWatermarks(new
TestWatermarkAssigner())
.keyBy(new TestKeySelector())
.timeWindow(Time.milliseconds(1),
Time.milliseconds(1))
.process(new ProcessWindowFunction<Integer,
Integer, Integer, TimeWindow>() {
private static final long
serialVersionUID = 1L;
@Override
public void process(Integer integer,
Context context, Iterable<Integer> elements, Collector<Integer> out) throws
Exception {
out.collect(integer);
context.output(sideOutputTag,
"sideout-" + String.valueOf(integer));
}
});
```
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