Akka/Scala example source code file (HttpProducer.java)

This example Akka source code file (HttpProducer.java) is included in my "Source Code Warehouse" project. The intent of this project is to help you more easily find Akka and Scala source code examples by using tags.

All credit for the original source code belongs to akka.io; I'm just trying to make examples easier to find. (For my Scala work, see my Scala examples and tutorials.)

Akka tags/keywords

actor, actorref, akka, camel, camelmessage, hashset, httpproducer, object, override, set, string, untypedproduceractor

The HttpProducer.java Akka example source code

package sample.camel.http;

import akka.actor.ActorRef;
import akka.camel.CamelMessage;
import akka.camel.javaapi.UntypedProducerActor;
import org.apache.camel.Exchange;

import java.util.HashSet;
import java.util.Set;

public class HttpProducer extends UntypedProducerActor {
  private ActorRef transformer;

  public HttpProducer(ActorRef transformer) {
    this.transformer = transformer;
  }

  public String getEndpointUri() {
    // bridgeEndpoint=true makes the producer ignore the Exchange.HTTP_URI header, 
    // and use the endpoint's URI for request
    return "jetty://http://akka.io/?bridgeEndpoint=true";
  }

  // before producing messages to endpoints, producer actors can pre-process
  // them by overriding the onTransformOutgoingMessage method
  @Override
  public Object onTransformOutgoingMessage(Object message) {
    if (message instanceof CamelMessage) {
      CamelMessage camelMessage = (CamelMessage) message;
      Set<String> httpPath = new HashSet<String>();
      httpPath.add(Exchange.HTTP_PATH);
      return camelMessage.withHeaders(camelMessage.getHeaders(httpPath));
    } else
      return super.onTransformOutgoingMessage(message);
  }

  // instead of replying to the initial sender, producer actors can implement custom
  // response processing by overriding the onRouteResponse method
  @Override
  public void onRouteResponse(Object message) {
    transformer.forward(message, getContext());
  }
}