红帽构建的 Apache Camel for Quarkus 入门

流程

1. 在 code.quarkus.redhat.com 网站中，选择以下扩展：

   • camel-quarkus-rest
   • camel-quarkus-jackson

   • camel-quarkus-direct

     注意

     不要在 code.quarkus.redhat.com 上编译应用程序（在流程的最后一步中）。反之，使用下面 第 4.2.5 节 “开发模式” 部分描述的 compile 命令。

2. 进入从上一步中提取生成的项目文件的目录：

   $ cd <directory_name>

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流程

1. 在 src/main/java/org/acme/ 子文件夹中创建名为 Fruit.java 的文件。

2. 添加类，如以下代码片段所示：

   Fruit.java

   package org.acme.rest.json;
   
   import java.util.Objects;
   
   import io.quarkus.runtime.annotations.RegisterForReflection;
   
   /**
    * A REST entity representing a fruit.
    */
   @RegisterForReflection // Lets Quarkus register this class for reflection during the native build
   public class Fruit {
       private String name;
       private String description;
   
       public Fruit() {
       }
   
       public Fruit(String name, String description) {
           this.name = name;
           this.description = description;
       }
   
       public String getName() {
           return name;
       }
   
       public void setName(String name) {
           this.name = name;
       }
   
       public String getDescription() {
           return description;
       }
   
       public void setDescription(String description) {
           this.description = description;
       }
   
       @Override
       public boolean equals(Object obj) {
           if (!(obj instanceof Fruit)) {
               return false;
           }
   
           Fruit other = (Fruit) obj;
   
           return Objects.equals(other.name, this.name);
       }
   
       @Override
       public int hashCode() {
           return Objects.hash(this.name);
       }
   }

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3. 在 src/main/java/org/acme/ 子文件夹中创建名为 Legume.java 的文件。

4. 添加类，如以下代码片段所示：

   Legume.java

   package org.acme.rest.json;
   
   import java.util.Objects;
   
   import io.quarkus.runtime.annotations.RegisterForReflection;
   
   /**
    * A REST entity representing a legume.
    */
   @RegisterForReflection // Lets Quarkus register this class for reflection during the native build
   public class Legume {
       private String name;
       private String description;
   
       public Legume() {
       }
   
       public Legume(String name, String description) {
           this.name = name;
           this.description = description;
       }
   
       public String getName() {
           return name;
       }
   
       public void setName(String name) {
           this.name = name;
       }
   
       public String getDescription() {
           return description;
       }
   
       public void setDescription(String description) {
           this.description = description;
       }
   
       @Override
       public boolean equals(Object obj) {
           if (!(obj instanceof Legume)) {
               return false;
           }
   
           Legume other = (Legume) obj;
   
           return Objects.equals(other.name, this.name);
       }
   
       @Override
       public int hashCode() {
           return Objects.hash(this.name);
       }
   }

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5. 在 src/main/java/org/acme/ 子文件夹中创建名为 Routes.java 的文件。

6. 添加 Camel Rest 路由，如以下代码片段所示：

   Routes.java

   package org.acme.rest.json;
   
   import java.util.Collections;
   import java.util.LinkedHashSet;
   import java.util.Set;
   
   import org.apache.camel.builder.RouteBuilder;
   import org.apache.camel.model.rest.RestBindingMode;
   
   /**
    * Camel route definitions.
    */
   public class Routes extends RouteBuilder {
       private final Set<Fruit> fruits = Collections.synchronizedSet(new LinkedHashSet<>());
       private final Set<Legume> legumes = Collections.synchronizedSet(new LinkedHashSet<>());
   
       public Routes() {
   
           /* Let's add some initial fruits */
           this.fruits.add(new Fruit("Apple", "Winter fruit"));
           this.fruits.add(new Fruit("Pineapple", "Tropical fruit"));
   
           /* Let's add some initial legumes */
           this.legumes.add(new Legume("Carrot", "Root vegetable, usually orange"));
           this.legumes.add(new Legume("Zucchini", "Summer squash"));
       }
   
       @Override
       public void configure() throws Exception {
   
           restConfiguration().bindingMode(RestBindingMode.json);
   
           rest("/fruits")
                   .get()
                   .to("direct:getFruits")
   
                   .post()
                   .type(Fruit.class)
                   .to("direct:addFruit");
   
           rest("/legumes")
                   .get()
                   .to("direct:getLegumes");
   
           from("direct:getFruits")
                   .setBody().constant(fruits);
   
           from("direct:addFruit")
                   .process().body(Fruit.class, fruits::add)
                   .setBody().constant(fruits);
   
           from("direct:getLegumes")
                   .setBody().constant(legumes);
       }
   }

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   有关此示例的更多信息，请参阅 camel-quarkus-examples 存储库。