Bootstrap camel in spring web application - apache-camel

Question

I'm creating a application with Spring-jersey-camel. I wanted to expose my jersey layer and internally invoke camel routes to invoke resources.
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
<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;
}
}
Any idea what I'm doing wrong? or how to inject myRoute/ProducerTemplate im my orderResourceImpl.java. Thanks in advance

Answer 1

Two Options,
If ReservationResources is a spring bean then, Inject the Camel Context into it and create a ProducerTemplate from that
ProducerTemplate template = camelContext.createProducerTemplate();
If ReservationResources is not a spring bean then get the Camel Context via a static method https://stackoverflow.com/a/13633109/3696510 and then create the ProducerTemplate.
ProducerTemplate template = StaticSpringApplicationContext.getBean("camelContext").createProducerTemplate()
Also if you do use that StaticSpringApplicationContext mentioned in the link, I would add this method to it.
public static <T> T getBean(String beanName, Class<T> clazz) {
return (T) CONTEXT.getBean(beanName,clazz);
}