private Future<Recommendation> getDestinationWithReccomendation(Destination destination) {
ActorRef pricingActor =
SpringAppContext.actorSystem().actorOf(Props.create(PriceCalculationActor.class));
ActorRef foreCastActor =
SpringAppContext.actorSystem().actorOf(Props.create(WeatherForecastActor.class));
final Future<Calculation> calculationFuture =
toPrice(
Patterns.ask(
pricingActor,
new PriceRequest("moon", destination.getDestination()),
new Timeout(Duration.create(5, TimeUnit.SECONDS))));
final Future<Forecast> forecastFuture =
toForecast(
Patterns.ask(
foreCastActor,
new WeatherRequest(destination.getDestination()),
new Timeout(Duration.create(5, TimeUnit.SECONDS))));
return calculationFuture
.zip(forecastFuture)
.map(
new Mapper<Tuple2<Calculation, Forecast>, Recommendation>() {
@Override
public Recommendation apply(Tuple2<Calculation, Forecast> tuple) {
return new Recommendation(
destination.getDestination(), tuple._2().getForecast(), tuple._1().getPrice());
}
},
SpringAppContext.actorSystem().dispatcher());
}
private Future<List<Destination>> toVisits(Future<Object> visits) {
return visits.map(
new Mapper<Object, List<Destination>>() {
public List<Destination> apply(Object result) {
ResponseVisit visits = (ResponseVisit) result;
return visits.getVisitedDestination();
}
},
SpringAppContext.actorSystem().dispatcher());
}
private Future<List<Destination>> toDestinations(Future<Object> recommendations) {
return recommendations.map(
new Mapper<Object, List<Destination>>() {
public List<Destination> apply(Object result) {
RecommendationResponse response = (RecommendationResponse) result;
return response.getRecommendDestination();
}
},
SpringAppContext.actorSystem().dispatcher());
}
private Future<Forecast> toForecast(Future<Object> futureResponse) {
return futureResponse.map(
new Mapper<Object, Forecast>() {
public Forecast apply(Object result) {
WeatherResponse weather = (WeatherResponse) result;
return weather.getForecast();
}
},
SpringAppContext.actorSystem().dispatcher());
}
private Future<Calculation> toPrice(Future<Object> futureResponse) {
return futureResponse.map(
new Mapper<Object, Calculation>() {
public Calculation apply(Object result) {
PriceResponse price = (PriceResponse) result;
return price.getPrice();
}
},
SpringAppContext.actorSystem().dispatcher());
}
private Future<AgentResponse> toAgentResponse(
Future<List<Destination>> visitedFutures,
Future<Iterable<Recommendation>> reccomendationsFuture) {
return visitedFutures
.zip(reccomendationsFuture)
.map(
new Mapper<Tuple2<List<Destination>, Iterable<Recommendation>>, AgentResponse>() {
@Override
public AgentResponse apply(
Tuple2<List<Destination>, Iterable<Recommendation>> tuple) {
return new AgentResponse(tuple._1(), toList(tuple._2()));
}
},
SpringAppContext.actorSystem().dispatcher());
}
private Future<Iterable<Recommendation>> toTravelRecommendationWithInfo(
Future<List<Destination>> destinationsFutures) {
return destinationsFutures.flatMap(
new Mapper<List<Destination>, Future<Iterable<Recommendation>>>() {
@Override
public Future<Iterable<Recommendation>> apply(List<Destination> destinations) {
return Futures.traverse(
destinations,
new Function<Destination, Future<Recommendation>>() {
@Override
public Future<Recommendation> apply(Destination d) throws Exception {
return getDestinationWithReccomendation(d);
}
},
SpringAppContext.actorSystem().dispatcher());
}
},
SpringAppContext.actorSystem().dispatcher());
}
@RequestMapping("/api/akkaActorTravelAgent")
public DeferredResult<AgentResponse> processRequest() {
final DeferredResult<AgentResponse> deferredResult = new DeferredResult<>();
final long time = System.nanoTime();
final Future<Object> visitedRequest =
Patterns.ask(
recommenderActor,
new RequestVisit(),
new Timeout(Duration.create(5, TimeUnit.SECONDS)));
final Future<Object> recommendations =
Patterns.ask(
recommenderActor,
new RecommendationRequest(),
new Timeout(Duration.create(5, TimeUnit.SECONDS)));
final Future<List<Destination>> destinationsFutures = toDestinations(recommendations);
final Future<List<Destination>> visitedFutures = toVisits(visitedRequest);
final Future<Iterable<Recommendation>> recommendationsFuture =
toTravelRecommendationWithInfo(destinationsFutures);
final Future<AgentResponse> agentResponseFuture =
toAgentResponse(visitedFutures, recommendationsFuture);
agentResponseFuture.onComplete(
new OnComplete<AgentResponse>() {
@Override
public void onComplete(Throwable failure, AgentResponse response) throws Throwable {
if (response != null) {
response.setProcessingTime((System.nanoTime() - time) / 1000000);
deferredResult.setResult(response);
} else {
deferredResult.setErrorResult(failure);
}
}
},
SpringAppContext.actorSystem().dispatcher());
return deferredResult;
}
@RestController
public class AkkaTravelAgentController {
final ActorRef recommenderActor =
SpringAppContext.actorSystem()
.actorOf(Props.create(RecommenderActor.class).withRouter(new RoundRobinPool(5)));
@RequestMapping("/api/akkaActorTravelAgent")
public DeferredResult<AgentResponse> processRequest() {
final DeferredResult<AgentResponse> deferredResult = new DeferredResult<>();
final long time = System.nanoTime();
final Future<Object> visitedRequest =
Patterns.ask(
recommenderActor,
new RequestVisit(),
new Timeout(Duration.create(5, TimeUnit.SECONDS)));
final Future<Object> recommendations =
Patterns.ask(
recommenderActor,
new RecommendationRequest(),
new Timeout(Duration.create(5, TimeUnit.SECONDS)));
final Future<List<Destination>> destinationsFutures = toDestinations(recommendations);
final Future<List<Destination>> visitedFutures = toVisits(visitedRequest);
final Future<Iterable<Recommendation>> recommendationsFuture =
toTravelRecommendationWithInfo(destinationsFutures);
final Future<AgentResponse> agentResponseFuture =
toAgentResponse(visitedFutures, recommendationsFuture);
agentResponseFuture.onComplete(
new OnComplete<AgentResponse>() {
@Override
public void onComplete(Throwable failure, AgentResponse response) throws Throwable {
if (response != null) {
response.setProcessingTime((System.nanoTime() - time) / 1000000);
deferredResult.setResult(response);
} else {
deferredResult.setErrorResult(failure);
}
}
},
SpringAppContext.actorSystem().dispatcher());
return deferredResult;
}
private Future<List<Destination>> toDestinations(Future<Object> recommendations) {
return recommendations.map(
new Mapper<Object, List<Destination>>() {
public List<Destination> apply(Object result) {
RecommendationResponse response = (RecommendationResponse) result;
return response.getRecommendDestination();
}
},
SpringAppContext.actorSystem().dispatcher());
}
private Future<List<Destination>> toVisits(Future<Object> visits) {
return visits.map(
new Mapper<Object, List<Destination>>() {
public List<Destination> apply(Object result) {
ResponseVisit visits = (ResponseVisit) result;
return visits.getVisitedDestination();
}
},
SpringAppContext.actorSystem().dispatcher());
}
private Future<AgentResponse> toAgentResponse(
Future<List<Destination>> visitedFutures,
Future<Iterable<Recommendation>> reccomendationsFuture) {
return visitedFutures
.zip(reccomendationsFuture)
.map(
new Mapper<Tuple2<List<Destination>, Iterable<Recommendation>>, AgentResponse>() {
@Override
public AgentResponse apply(
Tuple2<List<Destination>, Iterable<Recommendation>> tuple) {
return new AgentResponse(tuple._1(), toList(tuple._2()));
}
},
SpringAppContext.actorSystem().dispatcher());
}
private Future<Iterable<Recommendation>> toTravelRecommendationWithInfo(
Future<List<Destination>> destinationsFutures) {
return destinationsFutures.flatMap(
new Mapper<List<Destination>, Future<Iterable<Recommendation>>>() {
@Override
public Future<Iterable<Recommendation>> apply(List<Destination> destinations) {
return Futures.traverse(
destinations,
new Function<Destination, Future<Recommendation>>() {
@Override
public Future<Recommendation> apply(Destination d) throws Exception {
return getDestinationWithReccomendation(d);
}
},
SpringAppContext.actorSystem().dispatcher());
}
},
SpringAppContext.actorSystem().dispatcher());
}
private Future<Recommendation> getDestinationWithReccomendation(Destination destination) {
ActorRef pricingActor =
SpringAppContext.actorSystem().actorOf(Props.create(PriceCalculationActor.class));
ActorRef foreCastActor =
SpringAppContext.actorSystem().actorOf(Props.create(WeatherForecastActor.class));
final Future<Calculation> calculationFuture =
toPrice(
Patterns.ask(
pricingActor,
new PriceRequest("moon", destination.getDestination()),
new Timeout(Duration.create(5, TimeUnit.SECONDS))));
final Future<Forecast> forecastFuture =
toForecast(
Patterns.ask(
foreCastActor,
new WeatherRequest(destination.getDestination()),
new Timeout(Duration.create(5, TimeUnit.SECONDS))));
return calculationFuture
.zip(forecastFuture)
.map(
new Mapper<Tuple2<Calculation, Forecast>, Recommendation>() {
@Override
public Recommendation apply(Tuple2<Calculation, Forecast> tuple) {
return new Recommendation(
destination.getDestination(), tuple._2().getForecast(), tuple._1().getPrice());
}
},
SpringAppContext.actorSystem().dispatcher());
}
private Future<Calculation> toPrice(Future<Object> futureResponse) {
return futureResponse.map(
new Mapper<Object, Calculation>() {
public Calculation apply(Object result) {
PriceResponse price = (PriceResponse) result;
return price.getPrice();
}
},
SpringAppContext.actorSystem().dispatcher());
}
private Future<Forecast> toForecast(Future<Object> futureResponse) {
return futureResponse.map(
new Mapper<Object, Forecast>() {
public Forecast apply(Object result) {
WeatherResponse weather = (WeatherResponse) result;
return weather.getForecast();
}
},
SpringAppContext.actorSystem().dispatcher());
}
public static <T> List<T> toList(final Iterable<T> iterable) {
return StreamSupport.stream(iterable.spliterator(), false).collect(Collectors.toList());
}
}