[jboss-dev-forums] [Design of JBoss ESB] - Publish ESB services to web services
Can we take the following steps to publish the ESB services to web sevices?
1. generate the wsdl contract for the given jboss-esb.xml when do initialization for
the esb service :
<service category="ServiceESB" name="helloworld"
description="Hello World">
| <actions mep="OneWay" input="serviceInput.xsd"
output="serviceOutput.xsd" fault1="fault1.xsd">
| <action name="action1"
| class="org.jboss.soa.esb.actions.Action1"
| process="displayMessage"/>
| <action name="action2"
class="org.jboss.soa.esb.actions.Action2" process="invokeCount"/>
| </actions>
| </service>
For the first stage, the input/output and fault xsd need to be provided, the next
stage , we can consider if we can generate these files by reflecting or analyzing the
message.
2. generate the web service implementation class used to publish web service.(to invoke
the standard jaxws api
Endpoint.publish(implementor) ). The generated web service implementation class for the
above ESB service can be this :
@WebServiceProvider(portName = "SoapPortInGeneratedWSDL", serviceName =
"serviceNameInGeneratedWSDL",
| targetNamespace = "http://www.jboss.org/esb/service",
| wsdlLocation = "wsdl/helloworld.wsdl")
| @ServiceMode(value = Service.Mode.MESSAGE)
| public class HelloWorldService implements Provider<SOAPMessage> {
|
| public HelloWorldService() {
| //Complete
| }
|
| public SOAPMessage invoke(SOAPMessage request) {
| // Compose the SOAPMessage to ESB awared message
| Message message = MessageComposer.compose(request);
| //Get the action class name and process method from the esb service
configuration
| message = Action1.displayMessage(message);
| message = Action2.invokeCount(message);
| SOAPMessage response = MessageComposer.decompose(message);
| return response;
| }
| }
I think using JAX-WS dispatch and provider style to publish a web service is the simple
way to do that .
Because we do not need to generate the types class and can easily line up the actions
classes.
3. invoke the jboss-ws api to publish the web service with generated implementation class
when the
ESB service start up.
I do not investigate the ESB code base deeply and have two questions for Step 2:
a . Can each response message be easily transformed to a javax.xml.SOAPMessage when we
have the output xsd file ?
b. How can we compose the ActionProcessingException to soap message when we have fault
xsd file? Take ActionProcessingException as a exception bean to marshal and unmarshall
fault message?
Any thoughts, comments and answer would be appreciated.
View the original post :
http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4145699#...
Reply to the post :
http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...