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.

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