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.builder.RouteBuilder;
  import org.apache.camel.component.reactive.streams.api.CamelReactiveStreamsService;
  import org.reactivestreams.Publisher;
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  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 a reactive stream framework can subscribe to events published
   * by Camel routes.
   *
   * The exchange pattern is in-only 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.basic.camel-to-reactor")
  public class BasicCamelToReactorExample {
  
      /**
       * The reactor streams.
       */
      @Component
      public static class BasicCamelToReactorExampleStreams {
          private static final Logger LOG = LoggerFactory.getLogger(BasicCamelToReactorExample.class);
  
          @Autowired
          private CamelReactiveStreamsService camel;
  
  
          @PostConstruct
          public void setupStreams() {
  
              // Use two streams from Camel
              Publisher<Integer> numbers = camel.fromStream("numbers", Integer.class);
              Publisher<String> strings = camel.fromStream("strings", String.class);
  
              Flux.from(numbers)
                      .zipWith(strings) // emit items in pairs
                      .map(tuple -> "BasicCamelToReactor - " + tuple.getT1() + " -> " + tuple.getT2())
                      .doOnNext(LOG::info)
                      .subscribe();
          }
  
      }
  
  
      /**
       * The Camel Configuration.
       */
      @Component
      public static class BasicCamelToReactorExampleRoutes extends RouteBuilder {
  
          @Override
          public void configure() throws Exception {
  
              // Generating numbers every 5 seconds and forwarding to the stream "numbers"
              from("timer:clock?period=5000&includeMetadata=true")
                      .setBody().header(Exchange.TIMER_COUNTER)
                      .to("reactive-streams:numbers");
  
              // Generating strings every 4.9 seconds and forwarding to the stream "strings"
              from("timer:clock2?period=4900&delay=2000&includeMetadata=true")
                      .setBody().simple("Hello World ${header.CamelTimerCounter}!")
                      .to("reactive-streams:strings");
  
          }
  
      }
  
  }
  