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2012

Why Apache Camel?

  • Apache Camel allows you to integrate your business components using Enterprise Integration patterns.

Use Case

  • You need to process purchase orders from your web site or from your business partners.
  • You like to acknowledge  the order first
  • You like to apply some business rules to the order
  • You like to send the purchase order to your accounting department and shipping departments.

 

camel.jpg

Apache Camel Code

 

public class OrderProcessingRoute extends RouteBuilder {

 

@Override

public void configure() throws Exception {

JaxbDataFormat pubJaxb = new JaxbDataFormat();

      pubJaxb.setContextPath("camel");

 

      from("jms:incomingOrders")

      .to("validator:xsd/cameleex1.xsd")

      .wireTap("direct:mainprocessing")

      .beanRef("orderProcessingBean", "acknowledge").inOut();

           

      from("direct:mainprocessing")

      .unmarshal(pubJaxb).beanRef("orderProcessingBean", "execute")

      .marshal(pubJaxb).convertBodyTo(String.class).multicast()

      .parallelProcessing().to("jms:shipping", "jms:accounting");      

}

  • OrderProcessingRoute listens to messages in the JMS queue
  • OrderProcessingRoute validates the incoming message
  • OrderProcessingRoute acknowledge the request using Spring bean.
  • OrderProcessingRoute applies business rules using Spring bean.
  • OrderProcessingRoute send the message to accounting department and shipping departments.
  • Done