Can you deploy a simple subclass of ServiceMBeanSupport that overrides say
startService only and prints a message? The YourClassMBean interface
doesnt need to have any methods, just extend ServiceMBean.
The reason I suggested xdoclet and xmbeans is that you appear to be
constructing MBeanInfos by hand, something I've never wanted to do.
Xdoclet can generate xml descriptors that eliminate the need for the
standard mbean interface class and supply the descriptor info from code
markup. In jboss 4 I just converted the 2 mbeans in the transaction module
to work this way. If you don't care about the informative messages and
don't want to learn xdoclet just use standard mbean stuff with no mbean
infos.
david jencks
On 2002.09.17 19:30:21 -0400 G.L. Grobe wrote:
> Ok, since I'm subclassing from ServiceMBeanSupport ... I'm still getting
> the
> same errors (the not Registered exception below). I took out the override
> to
> preRegister().
>
> Also, I didn't get why I need to use an xml dd and can't to it by hand
> since
> it's a little late in the game for me to start adding xdoclet
> everywheres.
> My project is like 90% complete and maybe once I get an initial release
> out
> I can do that, but not now.
>
> ----- Original Message -----
> From: "David Jencks" <[EMAIL PROTECTED]>
> To: <[EMAIL PROTECTED]>
> Sent: Sunday, September 15, 2002 3:58 PM
> Subject: Re: [JBoss-user] pre-registering an mbean
>
>
> > You are working way way way too hard. If you subclass
> ServiceMBeanSupport
> > you normally don't need to implement preRegister, and for sure it is
> not a
> > managed operation. If you want to supply mbean descriptor stuff use a
> > dynamic mbean or an xmbean. In any case generate the interface or
> xmbean
> > xml dd using xdoclet.
> >
> > If you need initialization logic put it in createService or
> startService.
> >
> > Look at a simple example in jboss such as XidFactory (goes with tx
> > manager).
> >
> > david jencks
> >
> > On 2002.09.15 16:30:57 -0400 G.L. Grobe wrote:
> > > Anyone have any info on how to pre-register an mbean? I'm going
> through
> > > the
> > > docs (and maybe I'm missing it) but I just don't see anything about
> how
> > > to
> > > do this. I just copied the pre-register method from the on-line docs,
> but
> > > didn't see any mention of it. Below is the error I'm getting, and
> below
> > > that
> > > is the mbean ...
> > >
> > > Any help much appreciated.
> > >
> > > 16:45:58,911 INFO [MainDeployer] Starting deployment of package:
> > >
> file:/u/public/jboss/jboss-3.0.2/server/default/deploy/acaiis-scheduler-serv
> > > ice.xml
> > > 16:45:59,773 ERROR [URLDeploymentScanner] Failed to deploy:
> > > org.jboss.deployment.scanner.URLDeploymentScanner$DeployedURL@23d7cabd{
> > >
> url=file:/u/public/jboss/jboss-3.0.2/server/default/deploy/acaiis-scheduler-
> > > service.xml, deployedLastModified=0 }
> > > org.jboss.deployment.DeploymentException:
> DefaultDomain:service=Scheduler
> > > is
> > > not registered.; - nested throwable:
> > > (javax.management.InstanceNotFoundException:
> > > DefaultDomain:service=Scheduler
> > > is not registered.)
> > > at org.jboss.deployment.SARDeployer.create(SARDeployer.java:227)
> > > at
> org.jboss.deployment.MainDeployer.create(MainDeployer.java:755)
> > > at
> org.jboss.deployment.MainDeployer.deploy(MainDeployer.java:615)
> > > at
> org.jboss.deployment.MainDeployer.deploy(MainDeployer.java:580)
> > > at java.lang.reflect.Method.invoke(Native Method)
> > > at
> > >
> org.jboss.mx.capability.ReflectedMBeanDispatcher.invoke(ReflectedMBeanDispat
> > > cher.java:284)
> > > at
> > > org.jboss.mx.server.MBeanServerImpl.invoke(MBeanServerImpl.java:517)
> > > at org.jboss.util.jmx.MBeanProxy.invoke(MBeanProxy.java:174)
> > > at $Proxy4.deploy(Unknown Source)
> > > at
> > >
> org.jboss.deployment.scanner.URLDeploymentScanner.deploy(URLDeploymentScanne
> > > r.java:427)
> > > ...
> > >
> > >
> > > --- *-service.xml deployment descriptors
> > >
> > > <mbean code="com.neuroquest.cais.jmx.mbeans.scheduler.Scheduler"
> > > name="DefaultDomain:service=Scheduler">
> > > </mbean>
> > >
> > >
> > > --- I'm trying to implement a scheduling service, so this is just the
> > > framework.
> > > --- Scheduler.java mbean
> > >
> > > public class Scheduler extends org.jboss.util.ServiceMBeanSupport
> > > implements SchedulerMBean
> > > {
> > > private String name;
> > >
> > > public ObjectName preRegister( MBeanServer server, ObjectName
> name)
> > > throws Exception {
> > > log.info( Scheduler.class, "preregister notification seen");
> > >
> > > Class thisClass = getClass();
> > > Class[] parameterTypes = { String.class };
> > >
> > > Method echoMethod = thisClass.getMethod( "echo",
> parameterTypes);
> > >
> > > String desc = "The echo op invokes the session bean echo method
> and
> > > "
> > > + "returns it's value prefixed with the helloPrefix
> attribute
> > > value";
> > >
> > > operations[0] = new MBeanOperationInfo( desc, echoMethod);
> > >
> > > parameterTypes = new Class[0];
> > >
> > > Method createMethod = thisClass.getMethod("create",
> > > parameterTypes);
> > > operations[1] = new
> > > MBeanOperationInfo( "The JBoss Service.create",
> createMethod);
> > >
> > > Method startMethod = thisClass.getMethod("start",
> parameterTypes);
> > > operations[2] = new
> > > MBeanOperationInfo( "The JBoss Service.start", startMethod);
> > >
> > > Method stopMethod = thisClass.getMethod("stop",
> parameterTypes);
> > > operations[3] = new
> > > MBeanOperationInfo( "The JBoss Service.stop", stopMethod);
> > >
> > > Method destroyMethod = thisClass.getMethod("destroy",
> > > parameterTypes);
> > > operations[4] = new
> > > MBeanOperationInfo( "The JBoss Service.stop",
> destroyMethod);
> > >
> > > return name;
> > > }
> > > public boolean createScheduler() {
> > >
> > > System.out.println("Creating MBean ...........");
> > > log.info(Scheduler.class, "Creating MBean ...........");
> > >
> > > SchedulerFactory schedFact = new StdSchedulerFactory();
> > > Scheduler sched = schedFact.getScheduler();
> > >
> > > sched.start();
> > >
> > > return true;
> > > }
> > >
> > > public String getName() {
> > > return "Scheduler name = " + name;
> > > }
> > >
> > > public void startService()() throws Exception {
> > > log.info(Scheduler.class, "Starting Scheduler Service MBean
> > > ...........");
> > > System.out.println("starting MBean ...........");
> > > }
> > >
> > > public void stopService() throws Exception {
> > > log.info(Scheduler.class, "Stopping Scheduler Service MBean
> > > ...........");
> > > System.out.println("stoping MBean ...........");
> > > }
> > > }
> > >
> > > --- SchedulerMBean.java
> > >
> > > public interface SchedulerMBean extends org.jboss.util.ServiceMBean
> > > {
> > > public void start() throws Exception;
> > > public void stop() throws Exception;
> > > public boolean createScheduler() throws Exception;
> > > public ObjectName preRegister( MBeanServer server, ObjectName
> name)
> > > throws Exception;
> > > }
> > >
> > >
> > >
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