Hi Tom
Could you please give me the part of the jboss.conf where the your MBean
<MLET> tag
is within.
Thanx Mad Andy
----- Original Message -----
From: Tom Cook <[EMAIL PROTECTED]>
To: <[EMAIL PROTECTED]>
Sent: Wednesday, September 13, 2000 9:31 PM
Subject: [jBoss-User] MBean client problems
> Hi
>
> I'm using JBoss to deploy some beans we've previously had deployed on
> WebLogic server. These beans access a service which generates primary
> keys in a particular way. I'm trying to implement this 'key manager'
> as an MBean to be loaded by jboss' JMX architecture. I've written the
> service and it seems load into jboss fine, connect to the datasource
> fine and I can admin it via that groovy thing on port 8082. I've
> written a test client and that doesn't work so well. The KeyManager
> interface and client look like this:
>
>
> KeyManager.java (a generic interface for key managers):
> ---
> package com.lisasoft.core.sql.keygen;
>
> public interface KeyManager extends java.rmi.Remote
> {
> public String getOID() throws KeyManagerException,
java.rmi.RemoteException;
> }
> ---
>
> KeyManagerTestClient.java (a client to test the key manager):
> ---
> import javax.naming.InitialContext;
> import com.lisasoft.core.sql.keygen.KeyManager;
> import com.lisasoft.core.sql.keygen.PostgresKeyManagerImpl;
>
> public class KeyManagerTestClient
> {
> public static void main( String args[] )
> {
> try
> {
> PostgresKeyManagerImpl pkmi = new PostgresKeyManagerImpl();
> pkmi = null;
> InitialContext ctx = new InitialContext();
> Object objRef = ctx.lookup( args[0] );
> PostgresKeyManagerImpl keys = (PostgresKeyManagerImpl)objRef;
> System.out.println( keys.getOID() );
> System.exit( 0 );
> }
> catch( Throwable t )
> {
> System.out.println( t.getClass().getName() );
> System.out.println( t.getMessage() );
> t.printStackTrace();
> }
> }
> }
> ---
>
> The rest of the code is attached below. When I try to run the test
> client with this command line:
>
> java -Djava.naming.factory.initial=org.jnp.interfaces.NamingContext\
> -Djava.naming.provider.url=192.168.83.54\
> -Djava.naming.factory.url.pkgs=org.jboss.naming\
> KeyManagerTestClient keymanager
>
> ('keymanager' being the JNDI name I've given it) I get this stack
> trace:
>
> javax.naming.NamingException: Could not dereference object. Root
exception is java.lang.ClassCastException:
com.lisasoft.core.sql.keygen.PostgresKeyManagerImpl
> at
javax.naming.spi.NamingManager.getObjectFactoryFromReference(NamingManager.j
ava:152)
> at
javax.naming.spi.NamingManager.getObjectInstance(NamingManager.java:305)
> at org.jnp.interfaces.NamingContext.lookup(NamingContext.java:368)
> at org.jnp.interfaces.NamingContext.lookup(NamingContext.java:265)
> at javax.naming.InitialContext.lookup(InitialContext.java:350)
> at KeyManagerTestClient.main(KeyManagerTestClient.java:14)
>
> And if I don't have those first two lines in the test client (which
> just instantiate an object then make it ready for garbage collection)
> I get almost identical errors but this time a
> java.lang.InstantiationException.
>
> Any ideas?
>
> Tom
>
> Other code:
>
> PostgresKeyManagerImplMBean.java:
> ---
> package com.lisasoft.core.sql.keygen;
>
> public interface PostgresKeyManagerImplMBean
> extends org.jboss.util.ServiceMBean
> {
> public static final String OBJECT_NAME = ":service=KeyManager";
> }
> ---
>
> PostgresKeyManagerImpl.java (an implementation which talks to
> PostgreSQL and operates as an MBean):
> ---
> package com.lisasoft.core.sql.keygen;
>
> import javax.management.*;
>
> import javax.naming.Reference;
> import javax.naming.Referenceable;
> import javax.naming.InitialContext;
> import javax.naming.Context;
> import javax.naming.NamingException;
> import javax.naming.NameNotFoundException;
> import javax.naming.Name;
>
> import java.sql.Connection;
> import java.sql.Statement;
> import java.sql.ResultSet;
>
> import javax.sql.DataSource;
>
> import org.jboss.util.ServiceMBeanSupport;
>
> public class PostgresKeyManagerImpl
> extends ServiceMBeanSupport
> implements MBeanRegistration, PostgresKeyManagerImplMBean, Referenceable,
KeyManager
> {
> private String jndiName = null;
> private String datasource = null;
>
> private byte low_num = 0;
>
> private byte high_num;
>
> public PostgresKeyManagerImpl()
> {
> }
>
> /* Implementation */
> public PostgresKeyManagerImpl( String jndiName, String datasource )
> {
> this.jndiName = jndiName;
> this.datasource = datasource;
> }
>
> private void refreshHighNum()
> {
> log.log( "High byte of keys being generated from database." );
> try
> {
> Connection conn = getConnection();
> Statement stmt = conn.createStatement();
> ResultSet rs = stmt.executeQuery
> ( "SELECT NEXTVAL( 'KEYMANAGER_SEQUENCE' ) AS HIGH_BYTE" );
> rs.next();
> log.log( "Old high byte: " + high_num );
> high_num = (byte)rs.getByte( 1 );
> log.log( "New high byte: " + high_num );
> }
> catch( Throwable e )
> {
> stopService();
> log.log( e.getMessage() );
> log.log( e.toString() );
> }
> }
>
> private Connection getConnection()
> throws java.sql.SQLException
> {
> try
> {
> InitialContext context = new InitialContext();
> Object objRef = context.lookup( datasource );
> DataSource ds = (DataSource)objRef;
>
> return (java.sql.Connection)ds.getConnection();
> }
> catch( java.sql.SQLException sqle )
> {
> stopService();
> log.log( sqle.getMessage() );
> log.log( sqle.toString() );
> throw sqle;
> }
> catch( Throwable e )
> {
> stopService();
> log.log( e.getMessage() );
> log.log( e.toString() );
> }
> return null;
> }
>
> public String getOID()
> throws KeyManagerException, java.rmi.RemoteException
> {
> if( low_num > 127 )
> {
> refreshHighNum();
> low_num = 0;
> }
>
> Integer ioid = new Integer( (int)(low_num & (high_num << 4)) );
> return ioid.toString();
> }
>
> /* MBean junk */
>
> public ObjectName getObjectName( MBeanServer server, ObjectName name )
> {
> try
> {
> return new ObjectName(OBJECT_NAME+",name="+jndiName);
> }
> catch( javax.management.MalformedObjectNameException mone )
> {
> log.log( mone.getMessage() );
> log.log( mone.toString() );
> }
> return null;
> }
>
> public String getName()
> {
> return "KeyManager";
> }
>
> public void initService()
> throws Exception
> {
> try
> {
> // Bind in JNDI
> bind((Context)(new InitialContext()), jndiName, this);
> }
> catch( NamingException ne )
> {
> log.log( ne.getMessage() );
> log.log( ne.toString() );
> return;
> }
>
> log.log( "KeyManager " + jndiName + " started and bound." );
>
> refreshHighNum();
> }
>
> private void bind(Context ctx, String name, Object val)
> throws NamingException
> {
> // Bind val to name in ctx, and make sure that all intermediate contexts
exist
>
> Name n = ctx.getNameParser("").parse(name);
> while (n.size() > 1)
> {
> String ctxName = n.get(0);
> try
> {
> ctx = (Context)ctx.lookup(ctxName);
> } catch (NameNotFoundException e)
> {
> ctx = ctx.createSubcontext(ctxName);
> }
> n = n.getSuffix(1);
> }
>
> ctx.bind(n.get(0), val);
> }
>
> public void stopService()
> {
> // Unbind from JNDI
> try
> {
> new InitialContext().unbind(jndiName);
> }
> catch (NamingException e)
> {
> ;
> }
> }
>
> /* eferenceable implementation */
> public Reference getReference()
> {
> return new Reference(getClass().getName(), getClass().getName(), null);
> }
> }
> ---
>
>
> --
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