Chapter 174. Swagger Java

<dependency>
    <groupId>org.apache.camel</groupId>
    <artifactId>camel-swagger-java</artifactId>
    <version>2.17.0.redhat-630xxx</version>
    <!-- use the same version as your Camel core version -->
</dependency>

  <servlet>
 
    <servlet-name>SwaggerServlet</servlet-name>
    <servlet-class>org.apache.camel.swagger.servlet.RestSwaggerServlet</servlet-class>

    <init-param>
      <!-- we specify the base.path using relative notation, that means the actual path will be calculated at runtime as
           http://server:port/contextpath/rest -->
      <param-name>base.path</param-name>
      <param-value>rest</param-value>
    </init-param>
    <init-param>
      <!-- we specify the api.path using relative notation, that means the actual path will be calculated at runtime as
           http://server:port/contextpath/api-docs -->
      <param-name>api.path</param-name>
      <param-value>api-docs</param-value>
    </init-param>

    <init-param>
      <param-name>api.version</param-name>
      <param-value>1.2.3</param-value>
    </init-param>
    <init-param>
      <param-name>api.title</param-name>
      <param-value>User Services</param-value>
    </init-param>
    <init-param>
      <param-name>api.description</param-name>
      <param-value>Camel Rest Example with Swagger that provides an User REST service</param-value>
    </init-param>
    <load-on-startup>1</load-on-startup>
  </servlet>

  <!-- swagger api -->
  <servlet-mapping>
    <servlet-name>SwaggerServlet</servlet-name>
    <url-pattern>/api-docs/*</url-pattern>
  </servlet-mapping>

public class UserRouteBuilder extends RouteBuilder {
    @Override
    public void configure() throws Exception {
        // configure we want to use servlet as the component for the rest DSL
        // and we enable json binding mode
        restConfiguration().component("netty4-http").bindingMode(RestBindingMode.json)
            // and output using pretty print
            .dataFormatProperty("prettyPrint", "true")
            // setup context path and port number that netty will use
            .contextPath("/").port(8080)
            // add swagger api-doc out of the box
            .apiContextPath("/api-doc")
                .apiProperty("api.title", "User API").apiProperty("api.version", "1.2.3")
                // and enable CORS
                .apiProperty("cors", "true");

        // this user REST service is json only
        rest("/user").description("User rest service")
            .consumes("application/json").produces("application/json")
            .get("/{id}").description("Find user by id").outType(User.class)
                .param().name("id").type(path).description("The id of the user to get").dataType("int").endParam()
                .to("bean:userService?method=getUser(${header.id})")
            .put().description("Updates or create a user").type(User.class)
                .param().name("body").type(body).description("The user to update or create").endParam()
                .to("bean:userService?method=updateUser")
            .get("/findAll").description("Find all users").outTypeList(User.class)
                .to("bean:userService?method=listUsers");
    }
}

  <!-- enable CORS filter so people can use swagger ui to browse and test the apis -->
  <filter>
    <filter-name>RestSwaggerCorsFilter</filter-name>
    <filter-class>org.apache.camel.swagger.rest.RestSwaggerCorsFilter</filter-class>
  </filter>


  <filter-mapping>
    <filter-name>RestSwaggerCorsFilter</filter-name>
    <url-pattern>/api-docs/*</url-pattern>
    <url-pattern>/rest/*</url-pattern>
  </filter-mapping>