J2EE Tutorial on Integrating Webservices with EJB 3.0

Continuing from part 1 and 2, this part will cover the following porting steps in

1.4 Integrate With EJB 3.0

1.4.1 Define a Remote Interface
1.4.2 Implement a Stateless Session Bean
1.4.3 Build Jar
1.4.4 Run an EJB Client

1.4 Inegrate with EJB 3.0

To integrate with EJb 3.0 (Stateless session bean) use generated stubs as helper classes.

1.4.1 Define a Remote Interface

So first thing is to define a Remote Interface.


package au.com.hello.integrate;

public interface EJB3Remote
{
String echo(String input);
}

1.4.2 Implement a Stateless Session Bean

Now implement that interface on a stateless bean



package au.com.hello.integrate;

import java.util.ArrayList;

import javax.ejb.Remote;
import javax.ejb.Stateless;
import javax.naming.InitialContext;
import javax.xml.ws.BindingProvider;

import org.jboss.annotation.ejb.RemoteBinding;
import org.jboss.logging.Logger;


// standard EJB3 annotations
@Remote(EJB3Remote.class)
@RemoteBinding(jndiBinding = "/ejb3/EJB3Client")
@Stateless

public class EJB3Client implements EJB3Remote
{
// Provide logging
private static Logger log = Logger.getLogger(EJB3Client.class);
public String echo(String inStr)
{
log.info("echo: " + inStr);


au.com.hello.integrate.GetMemberTestService service = new au.com.hello.integrate.GetMemberTestService();

//web services generated stub interface

au.com.hello.integrate.GetMemberTestPortType port =
service.getPort(au.com.hello.integrate.GetMemberTestPortType.class) ;

BindingProvider bp = (BindingProvider) port;
bp.getRequestContext().put(BindingProvider.USERNAME_PROPERTY, "test");
bp.getRequestContext().put(BindingProvider.PASSWORD_PROPERTY, "test");

log.info ("Got My logger going -2");

// This the call to web services generated stub interface ~~

String response =   port.getMemberTest(inStr);

return response;
}
}

1.4.3 Build Jar
Now build the jar file containing generated stubs and EJB remote interface and Ejb implementation
Structure for jar file is.


vsm@jm000606:deploy$ jar -tvf ejbservref_client.jar
0 Wed Sep 12 02:55:26 AUSEST 20 META-INF/
106 Wed Sep 12 02:55:24 AUSEST 20 META-INF/MANIFEST.MF
0 Wed Sep 12 02:55:26 AUSEST 20 au/
0 Wed Sep 12 02:55:26 AUSEST 20 au/com/
0 Wed Sep 12 02:55:26 AUSEST 20 au/com/hello/
0 Wed Sep 12 02:55:26 AUSEST 20 au/com/hello/integrate/
1950 Wed Sep 12 02:55:26 AUSEST 20 au/com/hello/integrate/EJB3Client.class
180 Wed Sep 12 02:55:26 AUSEST 20 au/com/hello/integrate/EJB3Remote.class
887 Wed Sep 12 02:55:26 AUSEST 20 au/com/hello/integrate/GetMemberTest.class
849 Wed Sep 12 02:55:26 AUSEST 20 au/com/hello/integrate/GetMemberTestPortType.class
931 Wed Sep 12 02:55:26 AUSEST 20 au/com/hello/integrate/GetMemberTestResponse.class
1640 Wed Sep 12 02:55:26 AUSEST 20 au/com/hello/integrate/GetMemberTestService.class
2073 Wed Sep 12 02:55:26 AUSEST 20 au/com/hello/integrate/ObjectFactory.class
279 Wed Sep 12 02:55:26 AUSEST 20 au/com/hello/integrate/package-info.class

Deploy this jar file and make sure it is deployed successfully.

1.4.4 Run an EJB Client


package au.com.hello.integrate.client;

import java.util.Hashtable;

import javax.naming.InitialContext;
import au.com.hello.integrate.EJB3Remote;

public class TestEjbService {

public static void main(String[] args) throws Exception
{

InitialContext ctx = new InitialContext();

EJB3Remote client = (EJB3Remote) ctx.lookup("ejb3/EJB3Client");

System.out.println("1 + 1 = " + client.echo("HI MATHEW"));
}