Hi,
It seems that one of examples in the documentation contains bug, namely:
http://doc.akka.io/docs/akka/2.4.7/java/stream/stream-graphs.html
1. final Source<Integer, NotUsed> in = Source.from(Arrays.asList(1, 2, 3,
4, 5));
2. final Sink<List<String>, CompletionStage<List<String>>> sink = Sink.
head();
3. final Sink<List<Integer>, CompletionStage<List<Integer>>> sink2 = Sink
.head();
4. final Flow<Integer, Integer, NotUsed> f1 = Flow.of(Integer.class).map(
elem -> elem + 10);
5. final Flow<Integer, Integer, NotUsed> f2 = Flow.of(Integer.class).map(
elem -> elem + 20);
6. final Flow<Integer, String, NotUsed> f3 = Flow.of(Integer.class).map(
elem -> elem.toString());
7. final Flow<Integer, Integer, NotUsed> f4 = Flow.of(Integer.class).map(
elem -> elem + 30);
8.
9. final RunnableGraph<CompletionStage<List<String>>> result =
10. RunnableGraph.<CompletionStage<List<String>>>fromGraph(
11. GraphDSL
12. .create(
13. sink,
14. (builder, out) -> {
15. final UniformFanOutShape<Integer, Integer> bcast = builder.
add(Broadcast.create(2));
16. final UniformFanInShape<Integer, Integer> merge = builder.
add(Merge.create(2));
17.
18. final Outlet<Integer> source = builder.add(in).out();
19. builder.from(source).via(builder.add(f1))
20. .viaFanOut(bcast).via(builder.add(f2)).viaFanIn(merge)
21. .via(builder.add(f3.grouped(1000))).to(out);
22. builder.from(bcast).via(builder.add(f4)).toFanIn(merge);
23. return ClosedShape.getInstance();
24. }));
Here we define 'sink2' variable, but never use it. We are using 'out'
variable instead, which is undefined.
Please fix this confusing thing when it will be possible.
Thanks,
Sergey
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