Question

我正在使用Spring-jersey-camel创建一个应用程序。我想暴露我的泽西层并在内部调用camel路由来调用资源。

的web.xml

<context-param>
    <param-name>contextConfigLocation</param-name>
    <param-value>classpath:applicationContext.xml</param-value>
</context-param>

<listener>
    <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
</listener>

applicationContext.xml中

<camelContext id="camelContext" xmlns="http://camel.apache.org/schema/spring">
  <packageScan>
    <package>com.company.myapp.camel</package>
    <excludes>**.*</excludes>
    <includes>*Routes.java</includes>
  </packageScan>
</camelContext>

MyRoutes.java

@Component
public final class MyRoutes extends RouteBuilder {

  @Override
  public void configure() throws Exception {

      from("direct:getOrdersData").validate(body().isNotNull())
      .log("Camel to get orders")
      .to("restlet:http://localhost:8081/ordersapp/rest/order/123");    
  }
}

OrderResourceImpl.java

@Component
@Path("/orderLookup")
public class ReservationResources {

  @org.apache.camel.produce
  ProducerTemplate producer;

  public void setProducer(ProducerTemplate producer) throws Exception {
     this.producer = producer;
  }

  @GET
  @Produces(MediaType.APPLICATION_JSON)
  @Path("{orderId}")
  public Response orderLookup(@PathParam("orderId") final long orderrId){
    Response r = Response.noContent().build();

    //Producer is null. throws nullPointerException
    String order= producer.requestBody("direct:getOrdersData", orderId, String.class);
    r = Response.ok().entity(reservation).build();
    return r;
  }
}

知道我做错了什么吗？或者如何在我的orderResourceImpl.java中注入myRoute / ProducerTemplate。提前致谢

Answer 1

两个选项，如果ReservationResources是一个spring bean，那么，将Camel Context注入其中并从中创建一个ProducerTemplate

ProducerTemplate template = camelContext.createProducerTemplate();

如果ReservationResources不是spring bean，那么通过静态方法https://stackoverflow.com/a/13633109/3696510获取Camel Context，然后创建ProducerTemplate。

ProducerTemplate template = StaticSpringApplicationContext.getBean("camelContext").createProducerTemplate()

此外，如果您确实使用了链接中提到的StaticSpringApplicationContext，我会将此方法添加到其中。

public static <T> T getBean(String beanName, Class<T> clazz) {
    return (T) CONTEXT.getBean(beanName,clazz);
}

Bootstrap camel在春季网络应用程序中

1 个答案: