content: /*
   * Licensed to the Apache Software Foundation (ASF) under one or more
   * contributor license agreements.  See the NOTICE file distributed with
   * this work for additional information regarding copyright ownership.
   * The ASF licenses this file to You under the Apache License, Version 2.0
   * (the "License"); you may not use this file except in compliance with
   * the License.  You may obtain a copy of the License at
   *
   *      http://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   */
  package org.apache.camel.example.reactive.streams;
  
  import org.apache.camel.Header;
  import org.apache.camel.builder.RouteBuilder;
  import org.apache.camel.component.reactive.streams.util.UnwrapStreamProcessor;
  import org.reactivestreams.Publisher;
  import org.springframework.boot.autoconfigure.condition.ConditionalOnProperty;
  import org.springframework.context.annotation.Configuration;
  import org.springframework.stereotype.Component;
  import reactor.core.publisher.Flux;
  
  /**
   * This example shows how a Camel route defined with rest DSL can call a can asynchronously request data to a reactive stream framework
   * and continue processing.
   *
   * The exchange pattern is in-out from Camel to Reactor.
   *
   * Note: the Camel and reactor components are placed in the same configuration class for the sake of clarity,
   * but they can be moved in their own files.
   */
  @Configuration
  @ConditionalOnProperty("examples.others.rest")
  public class RestExample {
  
      /**
       * The reactor streams.
       */
      @Component("calculator")
      public static class RestExampleStreams {
  
          /**
           * This method will be called by a Camel route.
           */
          public Publisher<Long> sum(@Header("num1") Publisher<Long> num1, @Header("num2") Publisher<Long> num2) {
              return Flux.from(num1).zipWith(num2)
                      .map(t -> t.getT1() + t.getT2());
          }
  
      }
  
  
      /**
       * The Camel Configuration.
       */
      @Component
      public static class RestExampleRoutes extends RouteBuilder {
  
          @Override
          public void configure() throws Exception {
  
              // The full path should be eg.: http://localhost:8080/camel/sum/23/31
              rest().get("/sum/{num1}/{num2}")
                      .produces("text/plain")
                      .to("direct:sum");
  
              from("direct:sum")
                      .setHeader("num1").simple("${header.num1}",Long.class)
                      .setHeader("num2").simple("${header.num2}",Long.class)
                      .bean("calculator", "sum")
                      .process(new UnwrapStreamProcessor())
                      .setBody().simple("The result is: ${body}");
          }
  
      }
  
  }
  