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=doc #20885 small fix and clarification for Java stream-graphs example (#20894)

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* #20885 small fix and clarification for Java stream-graphs example

* #20885 GraphDSLDocTest comment wording improved
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gosubpl 2016-07-08 11:15:52 +02:00 • committed by Konrad Malawski
parent 92019c7ac9
commit 1756541dcb
1 changed files with 6 additions and 7 deletions
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13
akka-docs/rst/java/code/docs/stream/GraphDSLDocTest.java
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@ -50,25 +50,24 @@ public class GraphDSLDocTest extends AbstractJavaTest {
//#simple-graph-dsl
final Source<Integer, NotUsed> in = Source.from(Arrays.asList(1, 2, 3, 4, 5));
final Sink<List<String>, CompletionStage<List<String>>> sink = Sink.head();
final Sink<List<Integer>, CompletionStage<List<Integer>>> sink2 = Sink.head();
final Flow<Integer, Integer, NotUsed> f1 = Flow.of(Integer.class).map(elem -> elem + 10);
final Flow<Integer, Integer, NotUsed> f2 = Flow.of(Integer.class).map(elem -> elem + 20);
final Flow<Integer, String, NotUsed> f3 = Flow.of(Integer.class).map(elem -> elem.toString());
final Flow<Integer, Integer, NotUsed> f4 = Flow.of(Integer.class).map(elem -> elem + 30);
final RunnableGraph<CompletionStage<List<String>>> result =
RunnableGraph.<CompletionStage<List<String>>>fromGraph(
GraphDSL
.create(
sink,
(builder, out) -> {
RunnableGraph.fromGraph(
GraphDSL // create() function binds sink, out which is sink's out port and builder DSL
.create( // we need to reference out's shape in the builder DSL below (in to() function)
sink, // previously created sink (Sink)
(builder, out) -> { // variables: builder (GraphDSL.Builder) and out (SinkShape)
final UniformFanOutShape<Integer, Integer> bcast = builder.add(Broadcast.create(2));
final UniformFanInShape<Integer, Integer> merge = builder.add(Merge.create(2));
final Outlet<Integer> source = builder.add(in).out();
builder.from(source).via(builder.add(f1))
.viaFanOut(bcast).via(builder.add(f2)).viaFanIn(merge)
.via(builder.add(f3.grouped(1000))).to(out);
.via(builder.add(f3.grouped(1000))).to(out); // to() expects a SinkShape
builder.from(bcast).via(builder.add(f4)).toFanIn(merge);
return ClosedShape.getInstance();
}));