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 jakarta.annotation.PostConstruct;
  
  import org.apache.camel.Exchange;
  import org.apache.camel.component.reactive.streams.api.CamelReactiveStreamsService;
  import org.reactivestreams.Publisher;
  import org.springframework.beans.factory.annotation.Autowired;
  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 to define Camel rest endpoints using the direct client API.
   *
   * Note: the code is not spring-boot related and could have been placed in a standalone main().
   */
  @Configuration
  @ConditionalOnProperty("examples.client-api.rest")
  public class ClientAPIRestExample {
  
      @Component
      public static class ClientAPIRestExampleStreams {
  
          @Autowired
          private CamelReactiveStreamsService camel;
  
          @PostConstruct
          public void setup() {
  
              // Rest endpoint to retrieve all orders: http://localhost:8080/camel/orders
              camel.process("rest:get:orders", exchange ->
                      Flux.from(exchange)
                              .flatMap(ex -> allOrders()));
  
  
              // Rest endpoint to retrieve an order.
              // Try: http://localhost:8080/camel/orders/1
              // Or: http://localhost:8080/camel/orders/xxx
              camel.process("rest:get:orders/{orderId}", exchange ->
                      Flux.from(exchange)
                              .map(ex -> ex.getIn().getHeader("orderId", String.class))
                              .flatMap(this::toOrderInfo)
                              .map(Object.class::cast)
                              .switchIfEmpty(
                                      Flux.from(exchange)
                                              .doOnNext(ex -> ex.getOut().setBody("Not found"))
                                              .doOnNext(ex -> ex.getOut().setHeader(Exchange.HTTP_RESPONSE_CODE, 404))
                              ));
  
          }
  
          private Publisher<String> toOrderInfo(String orderId) {
              // Simulate a retrieval from DB
              return allOrders()
                      .filter(o -> o.equals(orderId)) // Ensure the order exists
                      .map("Detailed Info on "::concat) // Add detailed info
                      .next();
          }
  
          private Flux<String> allOrders() {
              return Flux.just("1", "2");
          }
  
      }
  
  }
  