org.springframework.cloud.stream.annotation.Input Java Examples

@StreamListener
@SendTo(Bindings.RATED_MOVIES)
KStream<Long, RatedMovie> rateMoviesFor(@Input(Bindings.AVG_TABLE) KTable<Long, Double> ratings,
                                        @Input(Bindings.MOVIES) KTable<Long, Movie> movies) {

  ValueJoiner<Movie, Double, RatedMovie> joiner = (movie, rating) ->
      new RatedMovie(movie.getMovieId(), movie.getReleaseYear(), movie.getTitle(), rating);

  movies
      .join(ratings, joiner, Materialized
          .<Long, RatedMovie, KeyValueStore<Bytes, byte[]>>as(Bindings.RATED_MOVIES_STORE)
          .withKeySerde(Serdes.Long())
          .withValueSerde(new JsonSerde<>(RatedMovie.class)));

  return movies.join(ratings, joiner).toStream();
}
 

@StreamListener
@Output(Processor.OUTPUT)
public Flux<Void> save(@Input(Processor.INPUT) Flux<Comment> newComment) {
	return repository
		.saveAll(newComment)
		.flatMap(comment -> {
			meterRegistry
				.counter("comments.consumed", "imageId", comment.getImageId())
				.increment();
			return Mono.empty();
		});
}
 

@StreamListener
@SendTo(Bindings.AVG_RATINGS)
KStream<Long, Double> averageRatingsFor(@Input(Bindings.RATINGS) KStream<Long, Rating> ratings) {
  KGroupedStream<Long, Double> ratingsGrouped =
      ratings
          .mapValues(Rating::getRating)
          .groupByKey();
  KTable<Long, Long> count = ratingsGrouped.count();
  KTable<Long, Double>
      reduce = ratingsGrouped.reduce(Double::sum, Materialized.with(Serdes.Long(), Serdes.Double()));
  KTable<Long, Double>
      join = reduce.join(count, (sum, count1) -> sum / count1, Materialized.with(Serdes.Long(), Serdes.Double()));
  return join.toStream();
}
 

@StreamListener
@Output(Processor.OUTPUT)
public Flux<Void> save(@Input(Processor.INPUT) Flux<Comment> newComment) {
	return repository
		.saveAll(newComment)
		.flatMap(comment -> {
			meterRegistry
				.counter("comments.consumed", "imageId", comment.getImageId())
				.increment();
			return Mono.empty();
		});
}
 

@StreamListener
@SendTo(USERS_FILTERED)
KStream<String, User> processUsers(@Input(USERS) KStream<String, User> inputStream) {
  return inputStream
      .filter((key, user) -> user.getAge() < 40)
      .mapValues(user -> new User(user.getName().toUpperCase(), user.getAge()))
      .peek((key, user) -> log.info("New entry in filtered stream => Key = " + key + " Value = " + user));
}
 

@StreamListener
public void process(@Input(Sink.INPUT) Flux<String> names) {
		names
			.map(Author::new)
			.flatMap(this.repository::save)
			.subscribe(saved -> System.out.println("saved " + saved.toString() + '.'));
}
 

@StreamListener
public void incomingMessages(@Input(Sink.INPUT) Flux<String> rnPublisher) {
	rnPublisher
			.map(rn -> new Reservation(null, rn))
			.flatMap(this.rr::save)
			.subscribe(r -> System.out.println("received and saved " + r.getId() + " with " + r.getReservationName() + "."));
}
 

@StreamListener
public void incomingMessages(@Input(Sink.INPUT) Flux<String> rnPublisher) {
	rnPublisher
			.map(rn -> new Reservation(null, rn))
			.flatMap(this.rr::save)
			.subscribe(r -> System.out.println("received and saved " + r.getId() + " with " + r.getReservationName() + "."));
}
 

@StreamListener
@Output(Processor.OUTPUT)
public Flux<Comment> save(@Input(Processor.INPUT) Flux<Comment> newComment) {
	return repository
		.saveAll(newComment)
		.map(comment -> {
			meterRegistry
				.counter("comments.consumed", "imageId", comment.getImageId())
				.increment();
			return comment;
		});
}
 

@StreamListener
@Output(Processor.OUTPUT)
public Flux<Comment> save(@Input(Processor.INPUT) Flux<Comment> newComment) {
	return repository
		.saveAll(newComment)
		.map(comment -> {
			meterRegistry
				.counter("comments.consumed", "imageId", comment.getImageId())
				.increment();
			return comment;
		});
}
 

@StreamListener
@Output(Processor.OUTPUT)
public Flux<String> verifyEmpString(@Input(Processor.INPUT) Flux<String> id) {
	System.out.println("first");
	id.delayElements(Duration.ofMillis(2))
	   .log();
	return id;
}
 

@Input("inventoryQ")
public MessageChannel inventoryQ();
 

@Input
SubscribableChannel customerCreatedIn();
 

@Input(NEW_COMMENTS)
SubscribableChannel newComments();
 

@Input
SubscribableChannel customerCreatedIn();
 

@Input("input4")
SubscribableChannel input4();
 

@Input("customInput")
SubscribableChannel in();
 

@Input(BROKER_TO_CLIENT)
SubscribableChannel brokerToClient();
 

@Input
SubscribableChannel subscriptionOnMoneyTransferredChannel();
 

@Input
SubscribableChannel subscriptionOnMoneyTransferredChannel();
 

@Input
SubscribableChannel subscriptionOnMoneyTransferredChannel();
 

@Input
SubscribableChannel creditApplicationDeclinedIn();
 

@Input(INPUT1)
SubscribableChannel input1();
 

@Input("custom-in")
SubscribableChannel customIn();
 

@Input
SubscribableChannel creditApplicationEnteredIn();
 

@Input(INPUT)
SubscribableChannel input();
 

@Input("inventoryQ")
public MessageChannel inventoryQ();
 

@Input
SubscribableChannel subscriptionOnMoneyTransferredChannel();
 

@Input("inventoryQ")
public MessageChannel inventoryQ();
 

@Input("checkInQ")
public MessageChannel checkInQ();