pekko/akka-docs/src/test/java/jdocs/camel/ErrorThrowingConsumer.java

/*
 * Copyright (C) 2018-2019 Lightbend Inc. <https://www.lightbend.com>
 */

package jdocs.camel;
// #ErrorThrowingConsumer
import akka.actor.Status;
import akka.camel.CamelMessage;
import akka.camel.javaapi.UntypedConsumerActor;
import akka.dispatch.Mapper;
import org.apache.camel.builder.Builder;
import org.apache.camel.model.ProcessorDefinition;
import org.apache.camel.model.RouteDefinition;
import scala.Option;

public class ErrorThrowingConsumer extends UntypedConsumerActor {
  private String uri;

  private static Mapper<RouteDefinition, ProcessorDefinition<?>> mapper =
      new Mapper<RouteDefinition, ProcessorDefinition<?>>() {
        public ProcessorDefinition<?> apply(RouteDefinition rd) {
          // Catch any exception and handle it by returning the exception message
          // as response
          return rd.onException(Exception.class)
              .handled(true)
              .transform(Builder.exceptionMessage())
              .end();
        }
      };

  public ErrorThrowingConsumer(String uri) {
    this.uri = uri;
  }

  public String getEndpointUri() {
    return uri;
  }

  public void onReceive(Object message) throws Exception {
    if (message instanceof CamelMessage) {
      CamelMessage camelMessage = (CamelMessage) message;
      String body = camelMessage.getBodyAs(String.class, getCamelContext());
      throw new Exception(String.format("error: %s", body));
    } else unhandled(message);
  }

  @Override
  public Mapper<RouteDefinition, ProcessorDefinition<?>> getRouteDefinitionHandler() {
    return mapper;
  }

  @Override
  public void preRestart(Throwable reason, Option<Object> message) {
    getSender().tell(new Status.Failure(reason), getSelf());
  }
}
// #ErrorThrowingConsumer