Remote accessibilty of MEJB

[ivrajesh]

Hi,

To access the MEJB there is standard code said in the JSR77 specification. This speaks more about getting an MEJB (ejb) remote
instance and accesing it.

Now assume that i want to access the MEJB from a remote location that means the client is in different JVM and also the client is
not a application in that application server. How can i achieve this?.

Please your help is greatly appreciated.

Thanks,
Rajesh I.V

[mclaugs]

if I am understanding your question, you are asking how do I access the MEJB from a remote machine?

you have to setup the InitialContext like you would for any accessing any EJB from a remote machine. this is described in the documentation.

After you get the InitialContext you need to do a jndi lookup for the "ejb/mgmt/MEJB"

for this to work you need to make sure that the jboss-jsr77-client.jar is in your classpath, it has the remote and home interfaces for the MEJB. This file is in the client directory of the distribution.

[ivrajesh]

Hi,

I didn't find any jar by name jboss-jsr77-client.jar in JBoss_3_0_4.If i deploy a client application in the server and could successfully
invoke mejb.

My concern is, to access the mejb from a different JVM (client which is not an application in the appserver). The following is the
piece of code i used in my client application.

Properties props = new Properties();
props.setProperty("java.naming.factory.initial","org.jnp.interfaces.NamingContextFactory");
props.setProperty("java.naming.provider.url","localhost:1099");
props.setProperty("java.naming.factory.url.pkgs","org.jboss.naming:org.jnp.interfaces");
Context ctx = new InitialContext(props);
NamingEnumeration enu = ctx.listBindings("ejb");
while(enu.hasMoreElements()){
System.out.println(" The element is : "+enu.nextElement().toString());
}
Object objref = ctx.lookup("ejb/mgmt/MEJB");
ManagementHome home = (ManagementHome)PortableRemoteObject.narrow(objref,ManagementHome.class);
Management mejb = home.create();
String domain = mejb.getDefaultDomain();
Set names = mejb.queryNames(new ObjectName("*:*"),null);

I have set almost all the jars in the classpath of my client and i couldn't not invoke mejb.
I get the following error

javax.naming.CommunicationException. Root exception is java.io.InvalidClassException:
org.jboss.invocation.jrmp.interfaces.JRMPInvokerProxy; Local class not compatible: stream classdesc
serialVersionUID=-3713605626489646730 local class serialVersionUID=4948756606502181321

Please suggest is there any ways to do it or am going wrong anywhere.

Thanks for all your support.

Rajesh I.V

[ivrajesh]

Hi,

I didn't find any jar by name jboss-jsr77-client.jar in JBoss_3_0_4.If i deploy a client application in the server and could successfully
invoke mejb.

My concern is, to access the mejb from a different JVM (client which is not an application in the appserver). The following is the
piece of code i used in my client application.

Properties props = new Properties();
props.setProperty("java.naming.factory.initial","org.jnp.interfaces.NamingContextFactory");
props.setProperty("java.naming.provider.url","localhost:1099");
props.setProperty("java.naming.factory.url.pkgs","org.jboss.naming:org.jnp.interfaces");
Context ctx = new InitialContext(props);
NamingEnumeration enu = ctx.listBindings("ejb");
while(enu.hasMoreElements()){
System.out.println(" The element is : "+enu.nextElement().toString());
}
Object objref = ctx.lookup("ejb/mgmt/MEJB");
ManagementHome home = (ManagementHome)PortableRemoteObject.narrow(objref,ManagementHome.class);
Management mejb = home.create();
String domain = mejb.getDefaultDomain();
Set names = mejb.queryNames(new ObjectName("*:*"),null);

I have set almost all the jars in the classpath of my client and i couldn't not invoke mejb.
I get the following error

javax.naming.CommunicationException. Root exception is java.io.InvalidClassException:
org.jboss.invocation.jrmp.interfaces.JRMPInvokerProxy; Local class not compatible: stream classdesc
serialVersionUID=-3713605626489646730 local class serialVersionUID=4948756606502181321

Please suggest is there any ways to do it or am going wrong anywhere.

Thanks for all your support.

Rajesh I.V

[bobfinkle]

I have had the same problem in trying to use MEJB. I finally found the missing information at http://wiki.jboss.org/wiki/Wiki.jsp?page=JSR7ManagementEJB. I'm not sure why no one has posted the fix sooner. In any case, its very simple. The MEJB is not deployed by default. You have to copy docs/examples/jmx/ejb-management.jar to your jboss-4.0.4.CR2\server\default\deploy (for jboss 4.0.4). After doing this I had not trouble doing a lookup on "ejb/mgmt/MEBJ".