Using RMI in EJBs

I have a business method of my session EJB:
public class ManagerBean implements SessionBean   {
   public GatewayReference registerGateway() throws RemoteException;
}and this is the definition of the return type:
public interface GatewayReference extends java.rmi.Remote {
   public void start() throws RemoteException;
}A client looks up my EJB home interface, creates the EJB and calls the registerGateway method.
Then, on the return object, start is called. I expect, because this class is java.rmi.Remote, the call to be remote but is not - it is invoked locally in the client VM.
Why is that?

Then, on the return object, start is called. I
expect, because this class is java.rmi.Remote,
the call to be remote but is not - it is invoked
locally in the client VM.
Why is that?May be I am missing something here but how do you find out that
the call is invoked locally?

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    Signature Algorithm: MD5withRSA, OID = 1.2.840.113549.1.1.4
    Key: SunJSSE RSA public key:
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    b1239fff 2ae5d31d b01a0cfb 1186bae0 bbc7ac41 94f24464 e92a7e33 6a5b0844
    109e30fb d24ad770 99b3ff86 bd96c705 56bf2e7a b3bb9d03 40fdcc0a c9bea9a1
    c21395a4 37d8b2ce ff00eb64 e22a6dd6 97578f92 29627229 462ebfee 061c99a4
    1c69b3a0 aea6a95b 7ed3fd89 f829f17e a9362efe ccf8034a 0910989a a8573305
    Validity: [From: Wed Feb 23 15:57:28 SGT 2005,
                   To: Tue May 24 15:57:28 SGT 2005]
    Issuer: CN=Server, OU=Bar, O=Foo, L=Some, ST=Where, C=UN
    SerialNumber: [    421c3768]
    Algorithm: [MD5withRSA]
    Signature:
    0000: 34 F4 FA D4 6F 23 7B 84 30 42 F3 5C 4B 5E 18 17 4...o#..0B.\K^..
    0010: 73 69 73 A6 BF 9A 5D C0 67 8D C3 56 DF A9 4A AC sis...].g..V..J.
    0020: 88 AF 24 28 C9 39 16 22 29 81 01 93 86 AA 1A 5D ..$(.9.")......]
    0030: 07 89 26 22 91 F0 8F DE E1 4A CF 17 9A 02 51 7D ..&".....J....Q.
    0040: 92 D3 6D 9B EF 5E C1 C6 66 F9 11 D4 EB 13 8F 17 ..m..^..f.......
    0050: E7 66 58 9F 6C B0 60 7C 39 B4 E0 B7 04 A7 7F A6 .fX.l.`.9.......
    0060: 4D A5 89 E7 F4 8A DC 59 B4 E7 A5 D4 0A 35 9A F1 M......Y.....5..
    0070: A2 CD 3A 04 D6 8F 16 B1 9E 6F 34 40 E8 C0 47 03 ..:[email protected].
    05/02/23 16:43:45 ***
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    05/02/23 16:43:45 Issuer: CN=Client, OU=Bar, O=Foo, L=Some, ST=Where, C=UN
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    05/02/23 16:43:47 com.oracle.iiop.server.OC4JORB(Thread[Orion Launcher,5,main]): dispatching to sc [email protected]7
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    05/02/23 16:43:48 NS ior = ..IOR:000000000000002b49444c3a6f6d672e6f72672f436f734e616d696e672f4e616d696e67436f6e746578744578743a312e30000000000001000000000000007c000102000000000c31302e312e3231342e31310015b3000000000031afabcb0000000020d309e06a0000000100000000000000010000000c4e616d65536572766963650000000004000000000a0000000000000100000001000000200000000000010001000000020501000100010020000101090000000100010100
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    05/02/23 16:45:14 at com.sun.net.ssl.internal.ssl.SSLSocketImpl.a(DashoA12275)
    05/02/23 16:45:14 at com.sun.net.ssl.internal.ssl.SSLSocketImpl.j(DashoA12275)
    05/02/23 16:45:14 at com.sun.net.ssl.internal.ssl.SSLSocketImpl.a(DashoA12275)
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    # oc4j.iiop.trustStoreLoc
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    Whether to use SSL when making the initial connection to the server.
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    remo.printText("Welcome to RMI world"); //the message send by the client
    System.out.println("The sending of RMI is succeed");
    } catch (Exception ex) {
    System.out.println("exception starts:");
    ex.printStackTrace();
    System.out.println("Exception occurs. Exception: " + ex.getMessage());
    Here is the traces,
    RMI: 1
    RMI: 2
    object name: com.ooc.CORBA.StubForObject
    object class loader: null
    Interface name: fr.teleca.orangebenchosa.cdrstat._NewSessionRemoteHome_Stub
    RMI: 3: IOR:000000000000004b524d493a66722e74656c6563612e6f72616e676562656e63686f73612e6 36472737461742e4e657753657373696f6e52656d6f7465486f6d653a30303030303030303030303 0303030300000000000010000000000000188000102000000000c31302e32342e31372e3638000d2 0000000000056afabcb00000000260000003f00000009533141532d4f52420000000000000002000 00008526f6f74504f41000000001237353732393838353136303237353936380000000000000d010 d0bede7dc000000000001ff140000000000070000000100000020000000000001000100000002050 10001000100200001010900000001000101000000002600000002000200000000000300000016000 000000000000c31302e32342e31372e3638000d1600000000000300000016000000000000000c313 02e32342e31372e3638000d1300000000001f0000000400000003000000200000000400000001000 000210000007c000000000000000100000000000000240000001e000000660000000000000001000 0000c31302e32342e31372e3638000d1600400000000000000008060667810201010100000017040 1000806066781020101010000000764656661756c740004000000000000000000000100000008060 66781020101010000000f
    exception starts:
    java.lang.ClassCastException
    at com.sun.corba.se.internal.iiop.ShutdownUtilDelegate.isLocal(Unknown Source)
    at javax.rmi.CORBA.Util.isLocal(Unknown Source)
    at fr.teleca.orangebenchosa.cdrstat._NewSessionRemoteHome_Stub.create(Unknown Source)
    at fr.teleca.orangebenchosa.servicelogic.CallHandler$EndState.sendCDRStat(CallHand ler.java:1385)
    at fr.teleca.orangebenchosa.servicelogic.CallHandler$EndState.start(CallHandler.ja va:1047)
    at com.appium.TAS.SessionContainer.StatefulObject.enterState(StatefulObject.java)
    at fr.teleca.orangebenchosa.servicelogic.CallHandler.access$4800(CallHandler.java: 61)
    at fr.teleca.orangebenchosa.servicelogic.CallHandler$SuccessfulLogicState.routeRes (CallHandler.java:902)
    at com.appium.TAS.SessionComponents.CallControl.a.exec(a.java)
    at com.appium.Basement.Synchronization.Asynchronizer.d(Asynchronizer.java)
    at com.appium.Basement.Synchronization.g.run(g.java)
    Exception occurs. Exception: null

    Hi ejp,
    because my stand alone client application runs on telecom server which uses orbacus. It calls the remote method on sun AS using RMI IIOP
    I specifed the properties of the client to use SUN AS naming services.
    I added j2ee.jar and appserv-rt.jar in my client program. but i dont know eventhough i specified the Util properties to use as below
    props.put("javax.rmi.CORBA.UtilClass","com.sun.corba.ee.impl.javax.rmi.CORBA.Util");
    props.put("org.omg.CORBA.ORBClass", "com.sun.corba.ee.impl.orb.ORBImpl");
    props.put("org.omg.CORBA.ORBSingletonClass", "com.sun.corba.ee.impl.orb.ORBSingleton");
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    Object obj;
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    NamingEnumeration ne = ctx.listBindings("ejb");
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    System.out.println("object class loader"+obj.getClass().getClassLoader());
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    ex.printStackTrace();
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    Thanks
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  • Skipping the RMI if ejb client is in the same box as WLS.

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    thanks,
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    "Ali Ozgun" <[email protected]> wrote in message
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    Hi,
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    at cliEjbMweb.cliTstMweb.narrow(cliTstMweb.java:133)
    at cliEjbMweb.cliTstMweb.getHome(cliTstMweb.java:31)
    at cliEjbMweb.cliTstMweb.testBean1(cliTstMweb.java:53)
    at jsp_servlet.__index._jspService(__index.java:91)
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    at weblogic.servlet.internal.ServletStubImpl.invokeServlet(ServletStubImpl.java:262)
    at weblogic.servlet.internal.ServletStubImpl.invokeServlet(ServletStubImpl.java:321)
    at weblogic.servlet.internal.ServletStubImpl.invokeServlet(ServletStubImpl.java:198)
    at weblogic.servlet.internal.WebAppServletContext.invokeServlet(WebAppServletContext.java:2637)
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    The same test using t3 is running OK (there is no problem of classpath).
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    Thank you !
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    "Marc" <[email protected]> writes:
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    Hi,
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    at weblogic.iiop.PortableRemoteObjectDelegateImpl.narrow(PortableRemoteObjectDelegateImpl.java:124)
    at javax.rmi.PortableRemoteObject.narrow(PortableRemoteObject.java:132)
    at cliEjbMweb.cliTstMweb.narrow(cliTstMweb.java:133)
    at cliEjbMweb.cliTstMweb.getHome(cliTstMweb.java:31)
    at cliEjbMweb.cliTstMweb.testBean1(cliTstMweb.java:53)
    at jsp_servlet.__index._jspService(__index.java:91)
    at weblogic.servlet.jsp.JspBase.service(JspBase.java:27)
    at weblogic.servlet.internal.ServletStubImpl.invokeServlet(ServletStubImpl.java:262)
    at weblogic.servlet.internal.ServletStubImpl.invokeServlet(ServletStubImpl.java:321)
    at weblogic.servlet.internal.ServletStubImpl.invokeServlet(ServletStubImpl.java:198)
    at weblogic.servlet.internal.WebAppServletContext.invokeServlet(WebAppServletContext.java:2637)
    at weblogic.servlet.internal.ServletRequestImpl.execute(ServletRequestImpl.java:2359)
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    The same test using t3 is running OK (there is no problem of classpath).
    Can you hel me ?
    Thank you !
    Marc

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    Thanks
    Regards
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    Dear,
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    As I know, If using RMI-IIOP, we have to handle lots of stuffs like
    connection pool, security...etc.
    Am I right?
    Kurt
    Tom Barnes <[email protected]> wrote in message
    news:[email protected]..
    >
    >
    Andy Piper wrote:
    RMI-IIOP is useful for:
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  • Is there any problems in IE if using RMI.?

    Hello buddies,
    this is my 3rd attempt to get answer. before it i tried 2 times but didn't get answered.
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    import java.rmi.*;
    import java.rmi.server.*;
    import canvas.Drawer;
    import java.awt.*;
    import java.applet.*;
    import java.applet.Applet;
    import java.awt.event.*;
    import java.util.*;
    import ru.zhuk.graphics.*;
    /*<applet code="ChatClient" width=600 height=300>
    </applet>
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         boolean flag=false;
         int n;
         String str="";
         String Coord=null;
         IChatService service=null;
         FrameApplet fa=null;
         TextField servername,serverport,username;
         Button connect,disconnect;
         TextField message;
         Button send,sendText;
         TextArea fromserver;
         int i=0,j=0;
         int x[] = new int[1000];
         int y[] = new int[1000];
         Drawer canvas;
         boolean connected=false;
         String title,user="";
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         public ChatClient()
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              setBounds(50,20,600,450);
              setLayout(new FlowLayout(FlowLayout.CENTER,45,10));
              title=str;
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              add(new Label("Chat Server Port : "));
              serverport=new TextField(20);
              add(serverport);
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              add(new Label("Your User Name : "));
              username=new TextField(20);
              add(username);
              username.setText("Umesh");
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              add(connect);
              disconnect=new Button("Disconnect");
              disconnect.addActionListener(this);
              add(disconnect);
              message=new TextField(30);
              add(message);
              sendText=new Button("Send Text");
              sendText.addActionListener(this);
              add(sendText);
              fromserver=new TextArea(10,50);
              add(fromserver);
              fromserver.setEditable(false);
    canvas = new Drawer();
              canvas.setSize(250,250);
              canvas.setBackground(Color.cyan);
              add(canvas);
              canvas.addMouseListener(this);
              canvas.addMouseMotionListener(this);
              send=new Button("Send");
              send.addActionListener(this);
              add(send);
              try
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              catch(Exception e)
              setVisible(true);
              for(j=0;j<1000;j++)
                   x[j]=0;
                   y[j]=0;
              Coord = new String();
              Coord = "";
    //          fa=new FrameApplet();
         public void mousePressed(MouseEvent me){}
         public void mouseReleased(MouseEvent me)
              Coord = Coord + "r";
         public void mouseClicked(MouseEvent me){}
         public void mouseEntered(MouseEvent me){}
         public void mouseExited(MouseEvent me){}
         public void mouseDragged(MouseEvent me)
              if (Coord == "")
                   Coord = me.getX() + "," + me.getY();
              else
                   Coord = Coord + " " + me.getX() + "," + me.getY();
         public void mouseMoved(MouseEvent me){}
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         private void connect()
              try
                   service = (IChatService)Naming.lookup("rmi://pcname/ChatService");
                   service.addClient(this);
                   connected=true;
                   setStatus();
                   user=username.getText();
                   Coord = "";
              catch(Exception e)
                   fromserver.append("Error Connecting ...\n" + e);
                   System.out.println(e);
                   connected=false;
                   setStatus();
                   service=null;
         private void disconnect()
              try
                   if(service==null)
                        return;
                   service.removeClient(this);
                   service=null;
              catch(Exception e)
                   fromserver.append("Error Connecting ...\n");
              finally
                   connected=false;
                   setStatus();
         private void setStatus()
              if(connected)
                   setTitle(title+" : Connected");
              else
                   setTitle(title+" : Not Connected");
         // IChatClient methods //
         public String getName()
              return user;
         public void sendMessage(String msg)
              fromserver.append(msg+"\n");
         public void SendCanvasObject(String str)
              this.str = str;
              fromserver.append(str + "\n");
              Graphics g = canvas.getGraphics();
              paint(g);
         // Actionlistener //
         public void actionPerformed(ActionEvent e)
              if(e.getSource()==connect)
                   connect();
                   if(connected)
                        servername.setEnabled(false);
                        serverport.setEnabled(false);
                        username.setEnabled(false);
                        connect.setEnabled(false);
                        Coord = "";
              else
              if(e.getSource()==disconnect)
                   disconnect();
                   servername.setEnabled(true);
                   serverport.setEnabled(true);
                   username.setEnabled(true);
                   connect.setEnabled(true);
              else
              if(e.getSource()==send)
                   flag = true;
                   if(service==null)
                        return;
                   try
                        fromserver.append("Sending an image...\n");
                        service.SendCanvasObject(this,Coord);
                        i=0;
                        for(j=0;j<1000;j++)
                             x[j]=0;
                             y[j]=0;
                        Coord = "";
                        fromserver.append("\n" + "Image Sent...");
                   catch(RemoteException re)
                        fromserver.append("Error Sending Message ...\n" + re);
                   catch(Exception ee)
                        fromserver.append("Error Sending Message ...\n" + ee);
              else
              if(e.getSource()==sendText)
                   if(service==null)
                        return;
                   try
                        service.sendMessage(this,message.getText());
                        message.setText("");
                   catch(RemoteException exp)
                        fromserver.append("Remote Error Sending Message ...\n" + exp);
                   catch(Exception ee)
                        fromserver.append("Error Sending Message ...\n" + ee);
         public void paint(Graphics g)
              if(flag==true)
                   i=0;
                   StringTokenizer stoken = new StringTokenizer(str,"r");
                   String strin = "";
                   while(stoken.hasMoreTokens())
                        strin = stoken.nextToken();
                        fromserver.append("\n" + strin + "\n");
                        StringTokenizer stoken1 = new StringTokenizer(strin," ");
                        String strin1 = "";
                        j=0;
                        while(stoken1.hasMoreTokens())
                             strin1 = stoken1.nextToken();
                             fromserver.append("\n" + strin1 + "\n");
                             x[j]=Integer.parseInt(strin1.substring(0,strin1.indexOf(",")));
                             y[j]=Integer.parseInt(strin1.substring(strin1.indexOf(",")+1,strin1.length()));
                             j++;
                        for(int k=0;k<j-1;k++)
                             g.drawLine(x[k],y[k],x[k+1],y[k+1]);     
                   i++;
    import java.rmi.*;
    import java.rmi.server.*;
    import canvas.Drawer;
    import java.util.*;
    import ru.zhuk.graphics.*;
    import java.awt.*;
    import java.awt.event.*;
    import java.applet.*;
    public class FrameApplet extends Applet implements ActionListener
         ChatClient f;
         public void init()
              Button b = new Button("Start Chat");
              b.addActionListener(this);
              add(b);
         public void actionPerformed(ActionEvent ae)
              f=new ChatClient("Chat");
              f.show();
              f.setSize(400,400);
    here is html file which i calls from IE
    <html>
    <title>Micky Chat</title>
    <body>
    <br>
    <br>
    <center>
    <applet code="FrameApplet.class" width=200 height=200>
    </applet>
    </center>
    </body>
    </html>
    and at last a shocking thing is it is runs in Netscape displaying frames but not calling paint method.
    pls. help me
    thanks a lot
    umesh

    Hi Umesh!
    Sorry that I cannot be too concrete about that since it has to be centuries ago when I fell over this problem.
    As far as I can remember, the JDK provided by MS has no RMI built-in. These was probably one of the main reasons why Sun sued Microsoft concering its handling of Java.
    Afterwards MS released a path for its Java Runtime that included RMI support, but AFAIK they never included it in the standard package. So much luck when searching for the ZIP! (-;
    A little bit of googling might help, e.g.:
    http://groups.google.com/groups?hl=de&lr=&ie=UTF-8&oe=UTF-8&threadm=37f8ddf6.4532124%40news.online.no&rnum=17&prev=/groups%3Fq%3Dmicrosoft%2Bjvm%2Brmi%2Bsupport%26start%3D10%26hl%3Dde%26lr%3D%26ie%3DUTF-8%26oe%3DUTF-8%26selm%3D37f8ddf6.4532124%2540news.online.no%26rnum%3D17
    cheers,
    kdi

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