(jdeveloper11g,MacOSX,EJB) access to EJB in jdevdeloper but not from jar

Question

hello,
I have created an application with an EJB which contains only one method : sayHello, which returns "hello" as a string.
I have also created another project in the same application, and the project is a swing project with one button; when you click opne the button the text of a jlabel is modified with the result of the method sayHello of the EJB.
The program runs well, I mean when I launch the application from jdeveloper, the window appears and when I click on the button the text of the label is changed
: the access to the EJB is good.
I specify the EJB is deplyed to a weblogic server, which seems to run well (I can access to the administration page).
But when I try to deploy the client to a JAR or a client JAR (I don't know the difference between them), the jar is created, and if I try to launch it the window appears but the text of the label isn't changed.
can you help me to make it work?
the access to the EJB seems good as it works from jdeveloper.
here is the client:
public class Frame1 extends JFrame {
private JButton jButton1 = new JButton();
private JLabel jLabel1 = new JLabel();
public Frame1() {
try {
jbInit();
} catch (Exception e) {
e.printStackTrace();
private void jbInit() throws Exception {
this.getContentPane().setLayout( null );
this.setSize( new Dimension(400, 300) );
jButton1.setText("Click me!");
jButton1.setBounds(new Rectangle(50, 30, 85, 29));
jButton1.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
jButton1_actionPerformed(e);
jLabel1.setText("jLabel1");
jLabel1.setBounds(new Rectangle(55, 80, 125, 15));
this.getContentPane().add(jLabel1, null);
this.getContentPane().add(jButton1, null);
private void jButton1_actionPerformed(ActionEvent e) {
myEJB MyEJB=null;
try {
final Context context = getInitialContext();
MyEJB = (myEJB)context.lookup("weblogic_2-Project1-myEJB#app7.myEJB");
} catch (Exception ex) {
ex.printStackTrace();
jLabel1.setText(MyEJB.disBonjour());
private static Context getInitialContext() throws NamingException {
Hashtable env = new Hashtable();
// WebLogic Server 10.x connection details
env.put( Context.INITIAL_CONTEXT_FACTORY, "weblogic.jndi.WLInitialContextFactory" );
env.put(Context.PROVIDER_URL, "t3://localhost:7001");
return new InitialContext( env );
I can go deep further in details concerning the deployment of the project if you ask me a peculiar question (I start in jdeveloper and don't know it well).
olivier.

Answer 1

Hi Grzegorz,
you answered most of your questions by yourself already. First of all do NEVER EVER share database schemes between J2EE and ABAP. Why? Because in most cases, the data models of an ABAP system are not only represented by fields of database tables and relations between database tables, but by the application logic behind it. As a consequence this means, that it is not recommended to access any database table used by an ABAP system directly from the J2EE engine.
The only safe way for access is the usage of JCo/SAPJRA, so, as you also already said, the better or only choice is to use JCo calls from session beans. It doesn't matter, if the ABAP system is remote or not.
Hope that helps.
Regards
Stefan