Portability problem

Hi
Ive just compiled and jarred up my code on windows(2000) using jdk1.3.1 (runs fine)....
i then FTPed it to a linux machine where it complained when i went to run it....
i got a 'no such method' error....
both boxes are running the same version of the jdk
whats going on...
Thanks
Marty

i'll try to explain exactly what ive done new....
originally, id ftped the code over to the linux box on countless occasions without any trouble.....
then i wrote a public method that returns an int called getQsize() on a class....
i then call this method from another class....
I am developing on windows 2000 using JBuilder3.5
the code compiles fine, and when i jar it up and run it, it works spot on returning the correct value from the method....
but when i port this over to linux.... (the same way id done b4) when this method is called it gives me a
java.lang.NoSuchMethodError on the line that tries to call the new method.........
any ideas (please)

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-+-No longer a forum member-+-

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Mettu Kumar <[email protected]> wrote:
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          >> >> --
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          >> --
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Message was edited by:
sonali-amonkar

hi there
am a beginner at ejb...have just started yesterday....
what i did was i read the basics of MDB and tried to run an example...but m stuck sumwhere n tried a lot but unsuccessful...
i am using jboss to deploy...
i am wrting a basic mdb where they have written a servlet to send message and MessageBean with the onMessage method.
i have also written the jboss.xml, web.xml, ejb-jar.xml, jboss-web.xml descriptors.
i am not understanding the flow on control hence maybe i am going wrong in the descriptors...
When i run the application i get a error message of jms not bound.
javax.naming.NameNotFoundException: jms not bound
Servlet:
public class MessageServlet extends GenericServlet {
static protected final Logger log =
Logger.getLogger(MessageServlet.class.getName());
     Queue _queue;
     ConnectionFactory _factory;
public void init()
throws ServletException
super.init();
// look up the objects.
try {
     // "java:comp/env" :- To avoid collisions with names of other enterprise resources in the JNDI namespace, and to avoid portability problems, all names in a J2EE application should begin with the string java:comp/env.
     //Context env = (Context) new InitialContext().lookup("java:comp/env");
     Context context = (Context) new InitialContext();
     System.out.println("1");
     //_factory = (ConnectionFactory) context.lookup("java:comp/env/jms/queue-connection-factory");
     _factory = (ConnectionFactory) context.lookup("java:comp/env/QueueConnectionFactory");
     if (_factory == null)
throw new ServletException("`java:comp/env/jms/queue-connection-factory' lookup failed");
     System.out.println("2");
     //_queue = (Queue) context.lookup("java:comp/env/jms/queue");
     _queue = (Queue) context.lookup("java:comp/env/queue");
     if (_queue == null)
throw new ServletException("`java:comp/env/jms/queue' lookup failed");
     } catch (NamingException ex) {
throw new ServletException(ex);
public void service(ServletRequest request, ServletResponse response)
throws ServletException, IOException
int count = 5;
try {
Connection connection = _factory.createConnection();
int ackMode = Session.AUTO_ACKNOWLEDGE;
Session jmsSession = connection.createSession(false, ackMode);
MessageProducer producer = jmsSession.createProducer(_queue);
for (int i = 1; i <= count; i++) {
String text = "hello, world: message #" + String.valueOf(i);
sendMessage(jmsSession,producer,text);
} catch (JMSException ex) {
throw new ServletException(ex);
PrintWriter out = response.getWriter();
out.print("Sent " + String.valueOf(count) + " messages.");
protected void sendMessage(Session jmsSession,
               MessageProducer producer,
               String text)
throws JMSException
// create the message
Message message = jmsSession.createTextMessage(text);
// send the message
producer.send(message);
log.info("Sent message: " + text);
ejb-jar.xml:
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE ejb-jar PUBLIC "-//Sun Microsystems, Inc.//DTD Enterprise JavaBeans 2.0//EN" "http://java.sun.com/dtd/ejb-jar_2_0.dtd">
<ejb-jar>
<description>assignment 3</description>
<display-name>assignment 3</display-name>
<enterprise-beans>

<message-driven >
<description>Bean to access messages</description>
<display-name>MessageBean</display-name>
<ejb-name>MessageBean</ejb-name>
<ejb-class>src.MessageBean</ejb-class>
     <destination>jms/queue</destination>
<transaction-type>Container</transaction-type>
<acknowledge-mode>Auto-acknowledge</acknowledge-mode>
<message-driven-destination>
<destination-type>javax.jms.Queue</destination-type>
</message-driven-destination>
     <resource-ref>
          <res-ref-name>jms/queue-connection-factory</res-ref-name>
          <res-type>javax.jms.QueueConnectionFactory</res-type>
          <res-auth>Container</res-auth>
     </resource-ref>
</message-driven>
</enterprise-beans>
<assembly-descriptor>
</assembly-descriptor>
</ejb-jar>
jboss.xml:
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE jboss PUBLIC "-//JBoss//DTD JBOSS//EN" "http://www.jboss.org/j2ee/dtd/jboss.dtd">
<jboss>
<enterprise-beans>
     <message-driven>
<ejb-name>MessageBean</ejb-name>
<destination-jndi-name>queue/ex</destination-jndi-name>
     <resource-ref>
          <res-ref-name>jms/queue-connection-factory</res-ref-name>
          <jndi-name>QueueConnectionFactory</jndi-name>
     </resource-ref>
</message-driven>
</enterprise-beans>
<resource-managers>
</resource-managers>
</jboss>
web.xml:
<web-app >
<log name="example" level="fine" path="WEB-INF/debug.log" timestamp="[%M:%S.%s] "
format="${log.loggerName} ${log.message}"/>

<resource jndi-name="queue-connection-factory"
type="javax.jms.ConnectionFactory"/>
<resource jndi-name="queue/ex"
type="javax.jms.Queue"/>

<ejb-server config-directory="WEB-INF">
<jms-connection-factory>jms/queue-connection-factory</jms-connection-factory>
</ejb-server>


<servlet>
<servlet-name>MDBServlet</servlet-name>
<servlet-class>src.MessageServlet</servlet-class>
</servlet>
<servlet-mapping>
<url-pattern>/mdb</url-pattern>
<servlet-name>MDBServlet</servlet-name>
</servlet-mapping>
<welcome-file-list>
          <welcome-file>/MDBExample.html</welcome-file>
     </welcome-file-list>
</web-app>
MessageBean.java
package src;
import java.util.logging.Level;
import java.util.logging.Logger;
import javax.ejb.EJBException;
import javax.ejb.MessageDrivenBean;
import javax.ejb.MessageDrivenContext;
import javax.jms.Message;
import javax.jms.MessageListener;
import javax.jms.TextMessage;
public class MessageBean implements MessageDrivenBean, MessageListener {
static protected final Logger log =
Logger.getLogger(MessageBean.class.getName());
public void ejbCreate()
throws EJBException
log.fine("ejbCreate()");
public void setMessageDrivenContext(MessageDrivenContext cxt)
throws EJBException
log.fine("setMessageDrivenContext()");
public void onMessage(Message msg)
// process the message
String text = null;
if (msg instanceof TextMessage) {
try {
text = ((TextMessage) msg).getText();
} catch (Exception ex) {
log.log(Level.WARNING,null,ex);
else {
text = msg.toString();
log.fine("onMessage(): " + text);
public void ejbRemove()
throws EJBException
log.fine("ejbRemove()");
Please help me out n pardon if its a stupid mistake as m just a beginner trying to learn this on my own.
thanx a lot
Message was edited by:
sonali-amonkar

Trouble with standalone app

I got the standalone app to work using this command:
java -Dorg.omg.CORBA.ORBInitialHost=localhost -Dorg.omg.CORBA.ORBInitialPort=3700 -classpath .;./CartAppClient.jar;./j2ee.jar;./appserv-rt.jar; CartClient CartBean
Which allows me to run the client and server on seperate machines. I tried to add security to some of the methods using the deploy tool and it works when I use this command:
appclient -client CartAppClient.jar
but when I try the first command I mentioned it only says:
Caught an unexpected exception!
I would like to know:
1) if I need to configure something else such as the Sun Server or something in the depoloy tool.
2) if I need to go in and change the source code for the application to make it work.
3) some documentation references online which can help me make this work.
I would really appreciate some help on this one. Thanks

The reason is that a stand-alone java client is not a portable J2EE component, but a J2EE Application Client is. From a J2EE platform perspective, the use of Application Clients is recommended since in that case your code is running with a type of J2EE container, albeit on the client side. This allows the infrastructure to provide many of the same services that are available to other kinds of J2EE components , e.g. access to java:comp/env, security, etc.
There is no mention of stand-alone java clients in the J2EE specs. Many J2EE implementations describe how to make such clients work, but there is no standardization to this since it's outside the scope of the specs. Some products have a way to make authentication work in stand-alone clients as well but that suffers from the same portability problem.

Has anyone here tried BSD?

Hi there,
We all know that Archlinux is BSD-like.However,has anyone here really experienced BSD,like FreeBSD,OpenBSD,NetBSD......What about that?:D

I'm using FreeBSD on my desktop that I'm typing from right now, Arch is on the laptop.
About a year ago, I started to get really frustrated with Linux distros -- thanks to Linux itself. You upgrade the kernel and stuff breaks. Kernel devs implement shiny new stuff instead of making sure that it at least works. I thought that using some less bleeding-edge distro than Arch would make things better, but I can't stand Debian, Gentoo is broken, Ubuntu and Fedora are too overcomplicated for me. So I switched to Windows. I was happy for some time, but my fingers are too used to the shell, and stuff like Cygwin just doesn't cut it. Then I found FreeBSD and been using it ever since.
The system itself is very simple and clean. Documentation is excellent so there's no smashing your head against the keyboard involved. All you really get is a basic Unix system: you have a shell, an editor (vi, ed), a compiler and the base necessary tools. You then build the rest yourself.
Third-party software management is a bit different from Linux distros. Linux distros are almost all about package management. Some distros also provide shiny stuff and patches everywhere, but we're on Arch forums and we know well Arch doesn't do that: Arch merely packages stuff and makes sure the packages work well together. Arch devs don't develop the kernel, they just package it. They don't develop base system utilities, they just package them. FreeBSD, on the other hand, is the kernel and the base tools. It does provide rather simple tools for package management (pkg_add, pkg_delete), and you can optionally install the Ports Tree, which is just a system of makefiles that take care of fetching, configuring and building software for you. Or you can install stuff yourself, though that's not recommended. FreeBSD isn't about the software that you install or how you install it, it's about providing you with the base platform on which the software can run.
That said, I find the Ports Tree very mature and easy to use. You can install third party scripts that will help you with software management, like portupgrade or portmaster (the latter being my favourite). But the system itself is very simple and thus easy to understand -- there's no magic involved.
(Some posters before me have mentioned packages being outdated. You probably were running a -RELEASE version, which is all fine and great, but it also means that the packages that are fetched by default are the packages that were available and built when -RELEASE was released. You can define the environment variable PACKAGESITE to point pkg_add to newer packages. It's all explained in the handbook -- especially the grey note may be of interest to you.)
During my day-to-day desktop usage, I don't see any difference from my previous Arch desktop. I have Xfce running, with Opera, Pidgin, Transmission, ePDFReader, and a bunch of terminals. I don't like shiny stuff, I didn't have it on Arch, I don't have it here. If you want, though, you can have it, there's no difference -- GUI software doesn't usually suffer any portability problems between Linux and FreeBSD. If I sat you at my desktop, I think you wouldn't even tell this is not a Linux distro, until you typed "uname -a" into the terminal.
HAL may be even more pain on FreeBSD than it is on Linux, but I hate HAL, I hated it when I was using Arch, I had it disabled back then, I have it disabled now. I have seen people reporting they got it to work successfully on FreeBSD, though. So if you like things like automounting, I believe you can have them. But I'm not of the sort of people who like auto- stuff, myself.
All in all, if you like barebones simplicity and like learning new things (it's different from Linux!), I don't see why you couldn't just give it a try. You can install it into VirtualBox, if you don't feel like messing up your primary PC and get some feel for what the system is and is not about.

Applicatin development/deployent on Linux

Is there any oracle tool (Developer/Designer) that can make
forms and reports that can run on Linux?
null

I hope they will make it run in both X and Character mode.
I think if it can work under X on Solaris, HPUX, AIX,
Digtal/Compaq Unix it will be easy to do it under Linux.
They just need to resolve to portability problems between
different Unix (Linux) Systems. I think X11R6 is quite compatible
with Solaris' libraries so there will not be any major problem.
The biggest one will be with character-sets. Does anyone know if
for example Linux support CL8MSWIN1251 as cyrillic characterset,
or it only supports KOI8 and ISO8859P5 ?
Regards,
Misho
Boris Biljman (guest) wrote:
: Soon?
: You mean in next year or two?
: Is there any chance that this Developer will produce forrms and
: reports for X window system, or it will be character based?
: Michael Daskaloff (guest) wrote:
: : Hi Boris,
: : There will soon be Developer 6.0 for Linux.
: : I don't know any details but It should be very good when it
: comes
: : out.
: : Boris Biljman (guest) wrote:
: : : Is there any oracle tool (Developer/Designer) that can make
: : : forms and reports that can run on Linux?
null

Portability problem

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