I posted an example (attached here) some time ago of a "hello world"-level
session bean that doesn't redeploy correctly. Whenever I redeploy session
beans using drag-and-drop into the deploy directory, I never get the new
code's behavior. I have to restart JBoss for it to pick up the changed
version of the bean.
Since the capability for hot deployment is one of JBoss' major benefits
(among many), I hate having it not work. If someone will give me a clue
about where the problem might be, I would take a crack at fixing it. I'm
guessing that it has something to do with the classloader tree.
I tried this running a stock release JBoss 2.1 without Tomcat. My classpath
was empty (no interference with system classloader happening, I think). I
am calling the bean from an external JVM client, running on Solaris 8, and
using JDK 1.3. Any help would be appreciated. We are trying to reduce the
build/test cycle time, and JBoss would have the answer if not for this bug!
Thanks,
Tim Taylor
Here is the code:
::::: Remote Interface
package strata.ejb.foo;
import java.rmi.*;
import javax.ejb.EJBObject;
public interface ISSB extends EJBObject {
public void hello() throws RemoteException;
}
::::: Home
package strata.ejb.foo;
import java.rmi.*;
import javax.ejb.*;
public interface SSBHome extends EJBHome {
ISSB create() throws CreateException, RemoteException;
}
::::: Bean
package strata.ejb.foo;
import javax.ejb.*;
import javax.naming.*;
public class SSB implements SessionBean {
public void ejbActivate() {}
public void ejbRemove() {}
public void ejbPassivate() {}
public void setSessionContext(SessionContext ctx) {}
public void ejbCreate() throws CreateException {}
public void hello() {
// Change this line before redeployment to see that the
// redeployment does not take effect. If you change Foo
// to Bar, redeploy, and then call the bean, it will
// still print Foo. If the server is bounced, then
// Bar will be printed.
System.out.println("Foo");
}
}
::::: ejb-jar.xml
<?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>
<small-icon>images/green-cube.gif</small-icon>
<enterprise-beans>
<session>
<small-icon>images/orange-cube.gif</small-icon>
<ejb-name>ssb</ejb-name>
<home>strata.ejb.foo.SSBHome</home>
<remote>strata.ejb.foo.ISSB</remote>
<ejb-class>strata.ejb.foo.SSB</ejb-class>
<session-type>Stateless</session-type>
<transaction-type>Container</transaction-type>
</session>
</enterprise-beans>
</ejb-jar>
::::: TestClient.java
package strata.ejb.foo;
import java.rmi.RemoteException;
import java.util.Hashtable;
import javax.naming.*;
import javax.ejb.*;
public class TestClient {
private ISSB ssb;
// private String url = "t3://localhost:9734";
private String url = "localhost:1099";
private String user = "user1";
private String password = "password1";
private String jndiName = "ssb";
private TestClient() throws Exception {
setUpService();
}
private void setUpService() throws Exception {
Hashtable env = new Hashtable();
// env.put(Context.INITIAL_CONTEXT_FACTORY,
// "weblogic.jndi.WLInitialContextFactory");
env.put(Context.INITIAL_CONTEXT_FACTORY,
"org.jnp.interfaces.NamingContextFactory");
env.put(Context.PROVIDER_URL, url);
env.put(Context.SECURITY_PRINCIPAL, user);
env.put(Context.SECURITY_CREDENTIALS, password);
Context ctx = new InitialContext(env);
SSBHome home = (SSBHome) ctx.lookup(jndiName);
ssb = (ISSB) home.create();
}
public static void main(String[] args) throws Exception {
// RunTest.runTest(new TestClient(), args);
TestClient tc = new TestClient();
tc.ssb.hello();
System.exit(0);
}
}
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