Introduction to Enterprise JavaBeans 3.0 – for JDeveloper 10.1.3.3

Introduction to Enterprise JavaBeans 3.0 – for JDeveloper 10.1.3.3

 

When you are reading the Introduction to Enterprise JavaBeans 3.0 in otn.oracle.com you will find that there is no step by step guidance to put the code in JDeveloper.

 

The version of JDeveloper I am using is 10.1.3.3 and the files that I am running with only Session Bean and its simple client.

 

For CalculateEJB.java:

 

import javax.ejb.Remote;

 

@Remote

public interface CalculateEJB {

    String incrementValue();

}

 

For CalculateEJBLocal.java:

 

import javax.ejb.Local;

 

@Local

public interface CalculateEJBLocal {

}

 

For CalculateEJBBean.java:

 

import javax.ejb.Stateless;

 

@Stateless(name="CalculateEJB")

public class CalculateEJBBean implements CalculateEJB, CalculateEJBLocal {

    public CalculateEJBBean() {

    }

   

    int value = 0;

    public String incrementValue()

    {

        value++;

        return "value incremented by 1";

    }

 

}

 

At last, for the simple client:

 

import javax.naming.Context;

import javax.naming.InitialContext;

import javax.naming.NamingException;

 

public class CalculateEJBClient {

    public static void main(String [] args) {

        try {

            final Context context = getInitialContext();

            CalculateEJB calculateEJB =   

                   (CalculateEJB)context.lookup("CalculateEJB");

            // Call any of the Remote methods below to access the EJB

            System.out.println( calculateEJB.incrementValue(  ) );

        } catch (Exception ex) {

            ex.printStackTrace();

        }

    }

 

    private static Context getInitialContext() throws NamingException {

        // Get InitialContext for Embedded OC4J

        // The embedded server must be running for lookups to succeed.

        return new InitialContext();

    }

}

 

Complete sample download.

About chanmingman

Since March 2011 Microsoft Live Spaces migrated to Wordpress (http://www.pcworld.com/article/206455/Microsoft_Live_Spaces_Moves_to_WordPress_An_FAQ.html) till now, I have is over 1 million viewers. This blog is about more than 50% telling you how to resolve error messages, especial for Microsoft products. The blog also has a lot of guidance teaching you how to get stated certain Microsoft technologies. The blog also uses as a help to keep my memory. The blog is never meant to give people consulting services or silver bullet solutions. It is a contribution to the community. Thanks for your support over the years. Ming Man is Microsoft MVP since year 2006. He is a software development manager for a multinational company. With 25 years of experience in the IT field, he has developed system using Clipper, COBOL, VB5, VB6, VB.NET, Java and C #. He has been using Visual Studio (.NET) since the Beta back in year 2000. He and the team have developed many projects using .NET platform such as SCM, and HR based applications. He is familiar with the N-Tier design of business application and is also an expert with database experience in MS SQL, Oracle and AS 400.
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