4.JAX-WS & JAVA 6 SE & EJB : Part3

7.Java6 &EJB

       

7.Java6 &EJB
<>Java6
With JavaSE6, we can get rid of Glassfish servers & tomcat.
JAVASE6 provides Embedded Web Server.


To publish a service,follo this steps:
1) Annotate the class with @ WebService to a minimum.
2) In the publisher Class (Main): Call:
Endpoint.publish Endpoint (String address, Object implementor)
=> Address: Address Choose this format
                        http://<host>:<port>/<ServerName>


              Example:  http://localhost:7865/hellojava6se
=> implementor: implement Implements instance of a Web Service
3) Run Main then, if you want WSDL URL, simply type the URL:
http://<host>:<port>/<ServiceName>?wsdl
if you work on Chrome:
view-source:http://<host>:<port>/<ServiceName>?wsdl


  i.Methods OF EndPoint : 
 1) publish(@,imp) : to publish a Web Service  .
 2) isPublished() : ensure if service was published .
 3)stop() : stop Publication of Service .

ii. HelloWorld WS&Java SE 6 : 

 1) Create Service Web and add required Annotations : 

    a.Interface: 

package slm.abdennour.ws;
 
import javax.jws.WebMethod;
import javax.jws.WebService;
 
//Service Endpoint Interface
@WebService
public interface HelloWorld{
 
 @WebMethod String getHelloWorldAsString(String name);
 
}

    b.Implementation : 

File : HelloWorldImpl.java

package slm.abdennour.ws;
 
import javax.jws.WebService;

//Service Implementation
@WebService(endpointInterface = "slm.abdennour.ws.HelloWorld")
public class HelloWorldImpl implements HelloWorld{
 
 @Override
 public String getHelloWorldAsString(String name) {
  return "Hello World JAX-WS " + name;
 }
 
}

 2)  manage publication of Web Service : 

package slm.abdennour.endpoint;
 
import javax.xml.ws.Endpoint;
import slm.abdennour.ws.HelloWorldImpl;
 
//Endpoint publisher
public class HelloWorldPublisher{
 
 public static void main(String[] args) {
    Endpoint.publish("http://localhost:8878/ws/hello", new HelloWorldImpl());
    }
 
}

Note
In general words, “web service endpoint” is a service which published outside for user to access; where “web service client” is the party who access the published service.


<>EJB :
1) To get Web Service in EJB Context : add @WebService to a Session EJB.(Stateless or ~ful)
    Example : 
   @Stateless
  @WebService(endpointInterface = "fr.ensma.lisi.notebookwebservicefromejb.NotebookService")
   public class NotebookServiceImpl {

2)Deploy App.....EJB Container Manage the Web Service ===>Don't need Servlet.

3) URL of WSDL : http://monserveur/app/Service?WSDL

4)To retrieve a Service Instance from EJB Container =>Inject @WebServiceReference.

    Example :

     public class NotebookWebServiceFromEJBClientServlet extends HttpServlet {

               @WebServiceRef(wsdlLocation =                  "http://localhost:8080/NotebookWebServiceFromEJB/Notebook?wsdl")

                private Notebook_Service service;

              

                protected void doGet(HttpServletRequest request, HttpServletResponse response)  thr ...

........

Reference : 

http://mbaron.developpez.com/

http://www.mkyong.com/tutorials/jax-ws-tutorials/