| /* |
| * 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 javax.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"); |
| } |
| |
| } |
| |
| } |