asfgit closed pull request #6527: [hotfix] [docs] Fix ProcessWindowFunction
code snippets.
URL: https://github.com/apache/flink/pull/6527
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diff --git a/docs/dev/stream/operators/windows.md
b/docs/dev/stream/operators/windows.md
index e5ec0091e07..bebc5dd260e 100644
--- a/docs/dev/stream/operators/windows.md
+++ b/docs/dev/stream/operators/windows.md
@@ -724,17 +724,19 @@ A `ProcessWindowFunction` can be defined and used like
this:
DataStream<Tuple2<String, Long>> input = ...;
input
- .keyBy(<key selector>)
- .window(<window assigner>)
- .process(new MyProcessWindowFunction());
+ .keyBy(t -> t.f0)
+ .timeWindow(Time.minutes(5))
+ .process(new MyProcessWindowFunction());
/* ... */
-public class MyProcessWindowFunction extends
ProcessWindowFunction<Tuple<String, Long>, String, String, TimeWindow> {
+public class MyProcessWindowFunction
+ extends ProcessWindowFunction<Tuple2<String, Long>, String, String,
TimeWindow> {
- void process(String key, Context context, Iterable<Tuple<String, Long>>
input, Collector<String> out) {
+ @Override
+ public void process(String key, Context context, Iterable<Tuple2<String,
Long>> input, Collector<String> out) {
long count = 0;
- for (Tuple<String, Long> in: input) {
+ for (Tuple2<String, Long> in: input) {
count++;
}
out.collect("Window: " + context.window() + "count: " + count);
@@ -749,9 +751,9 @@ public class MyProcessWindowFunction extends
ProcessWindowFunction<Tuple<String,
val input: DataStream[(String, Long)] = ...
input
- .keyBy(<key selector>)
- .window(<window assigner>)
- .process(new MyProcessWindowFunction())
+ .keyBy(_._1)
+ .timeWindow(Time.minutes(5))
+ .process(new MyProcessWindowFunction())
/* ... */
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