XmlOrderService.java

package camelinaction;

import org.apache.camel.Body;
import org.apache.camel.language.Bean;
import org.apache.camel.language.XPath;
import org.w3c.dom.Attr;
import org.w3c.dom.Document;
import org.w3c.dom.Node;

/**
 * A bean that acts as a XML order service to handle incoming XML orders
 */
public class XmlOrderService {

    public Document handleIncomingOrder(@Body Document xml,
                                        @XPath("/order/@customerId") int customerId,
                                        @Bean(ref = "guid", method = "generate") int orderId) {

        Attr attr = xml.createAttribute("orderId");
        attr.setValue("" + orderId);

        Node node = xml.getElementsByTagName("order").item(0);
        node.getAttributes().setNamedItem(attr);

        return xml;
    }

}