Applet getting ClassCastException on lookup

[cholliday]

I am trying to create a simple applet that receives topic messages. I get a ClassCastException on the lookup. I tried to use the example in the documentation but to no avail. I am using appletviewer. My code looks like this.

Properties jndiProps = new Properties() ;
jndiProps.setProperty("java.naming.factory.initial", "org.jnp.interfaces.NamingContextFactory" ) ;
jndiProps.setProperty("java.naming.factory.url.pkgs", "org.jboss.naming:org.jnp.interfaces" ) ;

Context context = new InitialContext(jndiProps);

TopicConnectionFactory topicFactory =
(TopicConnectionFactory)context.lookup("ConnectionFactory");


The code dies on assigning the topicFactory to the lookup
exception is:

java.lang.ClassCastException: javax.naming.Reference

Can anybody help.

Thanx,
Christian

[cholliday]

Nevermind I got to work with Netscape browser.

[mtags]

I am having the same problem

import java.applet.Applet;
import java.awt.Graphics;

import java.util.Hashtable;

import javax.naming.Context;
import javax.naming.InitialContext;
import javax.naming.NamingException;

import javax.jms.TopicConnectionFactory;
import javax.jms.TopicConnection;
import javax.jms.Session;
import javax.jms.Topic;
import javax.jms.TopicSubscriber;
import javax.jms.TopicSession;
import javax.jms.JMSException;
import javax.jms.Message;
import javax.jms.TextMessage;
import javax.jms.MessageListener;


public class LatencyApplet extends Applet
{
Graphics g = null;

String error = "er ";

public void init()
{
Hashtable props = new Hashtable();





try
{
props.put(Context.INITIAL_CONTEXT_FACTORY, "org.jnp.interfaces.NamingContextFactory");
props.put(Context.PROVIDER_URL, "localhost:1099");
props.put("java.naming.rmi.security.manager", "yes");
props.put(Context.URL_PKG_PREFIXES, "org.jboss.naming");


Context context = new InitialContext(props);

error += "created context\r\n";

TopicConnectionFactory topicFactory = (TopicConnectionFactory)context.lookup("UILConnectionFactory");

error += "created topic factory\15\12";

TopicConnection topicConnection = topicFactory.createTopicConnection();

error += "created topic connection\15\12";

TopicSession topicSession = topicConnection.createTopicSession(false, Session.AUTO_ACKNOWLEDGE);



Topic topic = (Topic)context.lookup("topic/heartbeat");



TopicSubscriber topicSubscriber = topicSession.createSubscriber(topic);



topicSubscriber.setMessageListener(new MsgListener());

topicConnection.start();




}
catch(NamingException eNAM)
{
error += eNAM.getMessage();
}

catch(JMSException eJMS)
{
error += "JMS ERROR ";
//error += eJMS.getLocalizedMessage();
}

}

public void paint(Graphics g)
{
try
{
g.drawString(error, 100, 100);

for(int i = 0; i < 100; i++)
{
g.drawString(String.valueOf(Latency.getLatency()), 25, 25);

Thread.sleep(1000);
}
}
catch(Exception e)
{

}
}
}




Help

[cholliday]

I am not sure what I had to do to get that working. My code now looks like this though.

Properties jndiProps = new Properties() ;
jndiProps.setProperty("java.naming.factory.initial", "org.jnp.interfaces.NamingContextFactory" ) ;
jndiProps.setProperty("java.naming.factory.url.pkgs", "org.jboss.naming:org.jnp.interfaces" ) ;
jndiProps.setProperty("java.naming.provider.url", "myhostname.mynetwork.com:1099" ) ;

Context context = new InitialContext(jndiProps);

TopicConnectionFactory topicFactory =
(TopicConnectionFactory)context.lookup("RMIConnectionFactory");

topicConnection = topicFactory.createTopicConnection();

topicSession = topicConnection.createTopicSession(
false, Session.AUTO_ACKNOWLEDGE);

topic = (Topic)context.lookup("topic/application");

topicSubscriber = topicSession.createSubscriber(topic);

topicSubscriber.setMessageListener(msgListener);

topicConnection.start();


And I have a jndi.properties file in my applet directory that looks like this

java.naming.factory.initial=org.jnp.interfaces.NamingContextFactory
java.naming.factory.url.pkgs=org.jnp.interfaces
java.naming.provider.url=localhost

You also have to make sure your applet includes the archive jar's in your html file.

<APPLET CODE = "YourApplet.class" CODEBASE="/prdjar/" ARCHIVE = "./jbossmq-client.jar,
./jboss-client.jar, ./sl2.jar, ./jboss-j2ee.jar, ./jbosssx-client.jar, ./jnp-client.jar, ./jndi.jar,
./jaas.jar, ./log4j.jar" WIDTH = 800 HEIGHT = 400>


Let me know if this helps

Christian

[mtags]

I figured out my problem. I mistyped the file name of one of the .jar files that I needed in the applet tag in my html.