How stub gets copied in Client machine

Hi,
I'm new to EJB. Tutorial states that stub would be in client side and it would make communication to skeleton which is in EJB server. Could someone pls explain when /how stub gets copied to client machine ?
Thanks.
Patil

When you request a page which contains Java Applet ( which is nothing but as .class file ) it gets transfered from server to the browser and gets executed using Browser's JVM. ( But I dont understand in what why this is related to my original questions )
Thanks.

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How to get the real client ip from HttpClusterServlet?

Hi All,
          WL 6.0 sp2 on Linux.
          When HttpClusterServlet is used, invoking HttpServletRequest.getServerName()
          will return the server name of the proxy server where HttpClusterServlet
          installed,
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Sorry I mean HTTPServlet.getRemoteAddr()
          "Lynch" <[email protected]> ¼¶¼g©ó¶l¥ó
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          > Hi All,
          >
          > WL 6.0 sp2 on Linux.
          >
          > When HttpClusterServlet is used, invoking
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          > installed,
          > rather than the actual client's ip which we are interested in.
          >
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I use JVM 1.4.2_08 on all machines.
If I put my client machine on the LAN with the WL server, then my EJB test client works fine. If I put the client machine on the remote network then the test client fails with a ClassCastException when trying to do a PortableRemoteObject.narrow on the bean home.
I had this running fine on JBoss 3.22 using RMI over HTTP. I added an HTTP invoker service to my jboss.xml file. I don't know if something similar is needed on the Weblogic side - any ideas on that? All I've done on the WL side is turn on Tunneling - which obviously works because the remote client gets a correct home object when doing a lookup on the bean - based on the IOR string of the home obj.
Below I include my client code, exception, ejb-jar.xml and my weblogic-ejb-jar.xml.
Any ideas on what else needs to be done so that a remote client can do a PortableRemoteObject.narrow? My client.jar has all of the EJB classes, and runs fine when run from LAN.
Thanks,
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Client Code
Properties p = new Properties();
p.put("java.naming.factory.initial", "weblogic.jndi.WLInitialContextFactory");
p.put("java.naming.provider.url", "http://66.114.140.213:7001");
InitialContext ic = new InitialContext(p);
// Test register bean
Object homeObj = ic.lookup("tacplanner/register");
RegisterHome home = (RegisterHome) PortableRemoteObject.narrow(homeObj, RegisterHome.class); // <<< ClassCastException here
Exception
java.lang.ClassCastException
at com.sun.corba.se.internal.javax.rmi.PortableRemoteObject.narrow(PortableRemoteObject.java:293)
at javax.rmi.PortableRemoteObject.narrow(PortableRemoteObject.java:134)
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at com.nimblus.tacplanner.test.TestUtils.main(TestUtils.java:196)
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<?xml version="1.0"?>
<!DOCTYPE ejb-jar PUBLIC '-//Sun Microsystems, Inc.//DTD Enterprise JavaBeans 1.1//EN' 'http://java.sun.com/j2ee/dtds/ejb-jar_1_1.dtd'>
<ejb-jar>
<enterprise-beans>
<session>
<ejb-name>register</ejb-name>
<home> com.nimblus.tacplanner.server.ejb.stateless.RegisterHome</home>
<remote> com.nimblus.tacplanner.server.ejb.stateless.Register</remote>
<ejb-class>com.nimblus.tacplanner.server.ejb.stateless.RegisterSession</ejb-class>
<session-type>Stateless</session-type>
<transaction-type>Container</transaction-type>
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</enterprise-beans>
<assembly-descriptor>
<container-transaction>
<method>
<ejb-name>register</ejb-name>
<method-name>*</method-name>
</method>
<trans-attribute>Required</trans-attribute>
</container-transaction>
</ejb-jar>
weblogic-ejb-jar.xml
<?xml version="1.0"?>
<!DOCTYPE weblogic-ejb-jar PUBLIC
'-//BEA Systems, Inc.//DTD WebLogic 8.1.0 EJB//EN'
'http://www.bea.com/servers/wls810/dtd/weblogic-ejb-jar.dtd'>
<weblogic-ejb-jar>
<weblogic-enterprise-bean>
<ejb-name>register</ejb-name>
<stateless-session-descriptor>
<pool>
<max-beans-in-free-pool>100</max-beans-in-free-pool>
</pool>
</stateless-session-descriptor>
<reference-descriptor>
<resource-description>
<res-ref-name>jdbc/OracleDS</res-ref-name>
<jndi-name>OracleDS</jndi-name>
</resource-description>
</reference-descriptor>
<enable-call-by-reference>True</enable-call-by-reference>
<jndi-name>tacplanner/register</jndi-name>
</weblogic-enterprise-bean>
</weblogic-ejb-jar>
--------------------

Problem solved.
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See: "http://e-docs.bea.com/wls/docs81/ejb/appc_ejbc.html#1151900"
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RichieW13 wrote:
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hi
check this not tested.
PROCEDURE OPEN_FILE (V_ID_DOC IN VARCHAR2)
IS
-- Open a stored document --
LC$Cmd Varchar2(1280) ;
LC$Nom Varchar2(1000) ;
LC$Fic Varchar2(1280);
LC$Path Varchar2(1280);
LC$Sep Varchar2(1) ;
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LB$Ok Boolean ;
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V_FICHERO VARCHAR2(500);
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BOTON NUMBER;
MODO VARCHAR2(50);
URL VARCHAR2(500);
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LC$Fic,
'TABLE_NAME',
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LC$Fic,
'TABLE_NAME',
'ITEM_NAME',
'WHERE'
) Then
NULL;
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Raise ;
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This is something that (to me at least) should be trivial but I just can't
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How do you get an FTP client to work?
I've tried several GUI clients as well as the terminal FTP command and they
all seem to get stuck entering passive mode - according to the log entries
they send the command.... And then nothing or a timeout, the following is
from the terminal FTP command:
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Connected to ftp.apple.com.
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ejn - thanks for your continued assistance.
I've tried turning the firewall off but this does not appear to make any difference(*). Also, I have Parallels installed and I'm sharing the internet connection with this (even though Parallels itself is not currently running). Turning this sharing off doesn't seem to change anything either.
I have noticed some entries in the ifpw.log file that coincide with some of the ftp actions. Given the following terminal session:
Titania:~ susan$ ftp ftp.apple.com
Trying 17.254.16.10...
Connected to ftp.apple.com.
220 17.254.16.10 FTP server ready
Name (ftp.apple.com:susan): anonymous
331 Anonymous login ok, send your complete email address as your password.
Password:
230 Anonymous access granted, restrictions apply.
Remote system type is UNIX.
Using binary mode to transfer files.
ftp> ls
501 EPSV: Operation not permitted
227 Entering Passive Mode (17,254,16,10,245,46).
200 PORT command successful
421 Service not available, remote server timed out. Connection closed
ftp>
at the time the "200 PORT command successful" is displayed, the ifpw log starts showing:
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Sep 5 09:11:24 Titania ipfw: 12190 Deny TCP 17.254.16.10:20 192.168.0.5:49162 in via en1
Sep 5 09:11:27 Titania ipfw: 12190 Deny TCP 17.254.16.10:20 192.168.0.5:49162 in via en1
Sep 5 09:11:30 Titania ipfw: 12190 Deny TCP 17.254.16.10:20 192.168.0.5:49162 in via en1
Sep 5 09:11:33 Titania ipfw: 12190 Deny TCP 17.254.16.10:20 192.168.0.5:49162 in via en1
Sep 5 09:11:36 Titania ipfw: 12190 Deny TCP 17.254.16.10:20 192.168.0.5:49162 in via en1
Sep 5 09:11:42 Titania ipfw: 12190 Deny TCP 17.254.16.10:20 192.168.0.5:49162 in via en1
which makes sense as the system tries to go for an active transfer.
(*) Actually, while I've been writing this, I've been playing on the terminal as well. I've found the combination of:
1) turning off the firewall
2) starting ftp
3) issuing the 'passive' command to turn off passive mode
4) issuing 'ls' etc. works
Looks like I've not been waiting long enough for the ftp client to get sick of trying the passive transfer and switching to an active one with the firewakk turned off!
Still doesn't answer the question - why does passive mode not work?
Susan

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catch(SecurityException se) {
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}

How to get the real client ip by the request header like asp/php,etc?

I want to get the real client ip by request.getHeader("HTTP_X_FORWARDED_FOR"), who use the proxy server to access my site, the way asp/php using, however, I got nothing. Does jsp support the similar header from request, if yes, how to do?
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frederick

I want to get the real client ip by request.getHeader("HTTP_X_FORWARDED_FOR"), who use the proxy server to access my site, the way asp/php using, however, I got nothing. Does jsp support the similar header from request, if yes, how to do?
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How stub gets copied in Client machine

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