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package org.glassfish.jersey.examples.rx.agent;
import java.util.ArrayList;
import java.util.List;
import javax.ws.rs.GET;
import javax.ws.rs.Path;
import javax.ws.rs.Produces;
import javax.ws.rs.client.WebTarget;
import javax.ws.rs.core.GenericType;
import org.glassfish.jersey.examples.rx.domain.AgentResponse;
import org.glassfish.jersey.examples.rx.domain.Calculation;
import org.glassfish.jersey.examples.rx.domain.Destination;
import org.glassfish.jersey.examples.rx.domain.Forecast;
import org.glassfish.jersey.examples.rx.domain.Recommendation;
import org.glassfish.jersey.server.Uri;
/**
* Obtain information about visited (destination) and recommended (destination, forecast, price) places for "Sync" user. Uses
* standard JAX-RS sync approach to obtain the data.
*
* @author Michal Gajdos (michal.gajdos at oracle.com)
*/
@Path("agent/sync")
@Produces("application/json")
public class SyncAgentResource {
@Uri("remote/destination")
private WebTarget destination;
@Uri("remote/calculation/from/{from}/to/{to}")
private WebTarget calculation;
@Uri("remote/forecast/{destination}")
private WebTarget forecast;
@GET
public AgentResponse sync() {
final long time = System.nanoTime();
final AgentResponse response = new AgentResponse();
// Obtain visited destinations.
response.setVisited(destination.path("visited").request()
// Identify the user.
.header("Rx-User", "Sync")
// Return a list of destinations
.get(new GenericType<List<Destination>>() {}));
// Obtain recommended destinations. (does not depend on visited ones)
final List<Destination> recommended = destination.path("recommended").request()
// Identify the user.
.header("Rx-User", "Sync")
// Return a list of destinations.
.get(new GenericType<List<Destination>>() {});
// Forecasts. (depend on recommended destinations)
final List<Forecast> forecasts = new ArrayList<>(recommended.size());
for (final Destination dest : recommended) {
forecasts.add(forecast.resolveTemplate("destination", dest.getDestination()).request().get(Forecast.class));
}
// Calculations. (depend on recommended destinations)
final List<Calculation> calculations = new ArrayList<>(recommended.size());
for (final Destination dest : recommended) {
calculations.add(calculation.resolveTemplate("from", "Moon").resolveTemplate("to", dest.getDestination())
.request().get(Calculation.class));
}
// Recommendations.
final List<Recommendation> recommendations = new ArrayList<>(recommended.size());
for (int i = 0; i < recommended.size(); i++) {
recommendations.add(new Recommendation(recommended.get(i).getDestination(), forecasts.get(i).getForecast(),
calculations.get(i).getPrice()));
}
response.setRecommended(recommendations);
response.setProcessingTime((System.nanoTime() - time) / 1000000);
return response;
}
}