JMS send seems to work, but receive and browse not

Question

Hi,
I use an Oracle9i database, registered it to OID and also registered a QueueConnectionFactory using Oracle sample code with slight changes as you can see below.
I then wrote a little AQ-JMS test programm to test sending and receiving messages also using Oracle's sample code with slight changes.
Registration works (as much as I can tell - at least I can see an entry in the OracleDBConnections in OID). Sending passes without any error messages and retrieval as well as browsing crashes with a null pointer exception of the style:
java.lang.NullPointerException
     at oracle.jms.AQjmsConsumer.<init>(AQjmsConsumer.java:222)
     at oracle.jms.AQjmsQueueBrowser.<init>(AQjmsQueueBrowser.java:99)
     at oracle.jms.AQjmsSession.createBrowser(AQjmsSession.java:1404)
     at oracle.jms.AQjmsSession.createBrowser(AQjmsSession.java:1251)
     at TestRegisteredAQQCF.browseMessages(TestRegisteredAQQCF.java:167)
     at TestRegisteredAQQCF.browse(TestRegisteredAQQCF.java:73)
     at TestRegisteredAQQCF.main(TestRegisteredAQQCF.java:26)
I will mark the lines, where this exceptions occur with //EXCEPTION
Oracle's Enterprise Manager Console says, there were no waiting, ready or expired messages in the queue.
Actually I simply want to use AQ as resource provider for OAS Dev Preview, but I could not find detailed documentation on that (in oc4j_j2ee_svcguide_r2.pdf I cannot find, what I have to put into jms.xml in case of AQ as resource provider) so I tried to test, whether I can send and receive at all. Maybe someone of you knows, what is wrong.
=================================================================
=================================================================
Send and Mail Code
==================
import java.util.Enumeration;
import java.util.Hashtable;
import javax.jms.*;
import javax.naming.Context;
import javax.naming.NamingException;
import javax.naming.directory.DirContext;
import javax.naming.directory.InitialDirContext;
import oracle.jms.AQjmsConstants;
import oracle.jms.AQjmsSession;
public class TestRegisteredAQQCF
public static void main(String args[])
try
I ran send a few times and commented the other two out. Then I tried each
of the other ones, always sending a few times inbetween.
//send();
//receive();
browse();
catch (JMSException e)
e.printStackTrace();
System.out.println("\n\nLinked Exception:\n");
e.getLinkedException().printStackTrace();
catch (Exception e)
e.printStackTrace();
public static void send() throws JMSException
QueueConnectionFactory qcf = null;
QueueSession qs = null;
Queue queue = null;
qcf = get_Factory_from_LDAP();
qs = getQueueSession(qcf);
queue = getQueue(qs);
sendMessageToQueue(queue, qs);
public static void receive() throws JMSException
QueueConnectionFactory qcf = null;
QueueSession qs = null;
Queue queue = null;
qcf = get_Factory_from_LDAP();
qs = getQueueSession(qcf);
queue = getQueue(qs);
receiveMessageFromQueue(queue, qs);
public static void browse() throws JMSException
QueueConnectionFactory qcf = null;
QueueSession qs = null;
Queue queue = null;
qcf = get_Factory_from_LDAP();
qs = getQueueSession(qcf);
queue = getQueue(qs);
browseMessages(queue, qs);
public static QueueConnectionFactory get_Factory_from_LDAP()
Hashtable env = new Hashtable(5, 0.75f);
env.put(Context.INITIAL_CONTEXT_FACTORY, AQjmsConstants.INIT_CTX_FACTORY);
// aqldapserv is your LDAP host and 389 is your port
env.put(Context.PROVIDER_URL, "ldap://anduin:389");
// now authentication info
// username/password scheme, user is OE, password is OE
env.put(Context.SECURITY_AUTHENTICATION, "simple");
env.put(Context.SECURITY_PRINCIPAL, "cn=orcladmin");
env.put(Context.SECURITY_CREDENTIALS, "welcome");
//env.put("server_dn", "cn=ora9_aq,cn=OracleContext");
QueueConnectionFactory qc_fact = null;
try
DirContext inictx = new InitialDirContext(env);
// initialize context with the distinguished name of the database server
inictx = (DirContext) inictx.lookup("cn=ora9_aq,cn=OracleContext");
//go to the connection factory holder cn=OraclDBConnections
DirContext connctx = (DirContext) inictx.lookup("cn=OracleDBConnections");
// get connection factory "oe_queue_factory"
qc_fact = (QueueConnectionFactory)
connctx.lookup("cn=CarnotQueueConnectionFactory");
catch (NamingException e)
e.printStackTrace();
System.out.println("\n\nRoot Cause: \n");
e.getRootCause().printStackTrace();
return qc_fact;
public static Queue getQueue(QueueSession qsession)
throws JMSException
Queue queue = null;
queue = ((AQjmsSession) qsession).getQueue("", "CARNOTQUEUE");
return queue;
private static QueueSession getQueueSession(QueueConnectionFactory qcf)
throws JMSException
QueueConnection qc = qcf.createQueueConnection("carnotaq", "carnotaq");
qc.start();
QueueSession qs = qc.createQueueSession(true, 0);
return qs;
private static void sendMessageToQueue(Queue queue, QueueSession qsession)
throws JMSException
String whatEverObject = "I'm the message's object nr. 1!";
QueueSender sender = null;
ObjectMessage objMessage = null;
sender = qsession.createSender(queue);
objMessage = qsession.createObjectMessage();
objMessage.setJMSCorrelationID("JMS1");
objMessage.setObject(whatEverObject);
qsession.commit();
private static void receiveMessageFromQueue(Queue queue, QueueSession qsession)
throws JMSException
QueueReceiver receiver = null;
ObjectMessage objMessage = null;
String whatEverObject = null;
receiver = qsession.createReceiver(queue); //EXCEPTION
objMessage = (ObjectMessage) receiver.receive();
whatEverObject = (String) objMessage.getObject();
System.out.println("Object: " + whatEverObject);
System.out.println("JMSCorrelation ID: " + objMessage.getJMSCorrelationID());
private static void browseMessages(Queue queue, QueueSession qsession)
throws JMSException
QueueBrowser browser;
ObjectMessage objMessage;
Enumeration messages;
String whatEverObject;
browser = qsession.createBrowser(queue,
"JMSCorrelationID = 'JMS1'"); //EXCEPTION
for (messages = browser.getEnumeration() ; messages.hasMoreElements() ;)
objMessage = (ObjectMessage)messages.nextElement();
whatEverObject = (String) objMessage.getObject();
System.out.println("Object: " + whatEverObject);
System.out.println("JMSCorrelation ID: " + objMessage.getJMSCorrelationID());
browser.close();
=================================================================
=================================================================
Registration Code:
==================
import java.sql.Driver;
import java.sql.DriverManager;
import java.util.Hashtable;
import javax.jms.JMSException;
import javax.naming.Context;
import oracle.jms.AQjmsConstants;
import oracle.jms.AQjmsFactory;
public class RegisterAQQCF
public static void main(String args[])
register_Factory_in_LDAP();
public static void register_Factory_in_LDAP()
Hashtable env = new Hashtable(5, 0.75f);
env.put(Context.INITIAL_CONTEXT_FACTORY, AQjmsConstants.INIT_CTX_FACTORY);
System.out.println(AQjmsConstants.INIT_CTX_FACTORY);
// aqldapserv is your LDAP host and 389 is your port
env.put(Context.PROVIDER_URL, "ldap://anduin:389");
// now authentication info
// username/password scheme, user is standard
env.put(Context.SECURITY_AUTHENTICATION, "simple");
env.put(Context.SECURITY_PRINCIPAL, "cn=orcladmin");
env.put(Context.SECURITY_CREDENTIALS, "welcome");
env.put("server_dn", "cn=ora9_aq,cn=OracleContext");
/* register queue connection factory for database "ora9aq", host "anduin",
port 1521, driver "thin" */
try
AQjmsFactory.registerConnectionFactory(env, "CarnotQueueConnectionFactory", "anduin",
"ora9aq", 1521, "thin", "queue");
catch (JMSException e)
e.printStackTrace();
System.out.println("\n\n Root Cause: \n");
e.getLinkedException().printStackTrace();

Answer 1

I'm not sure at this point why you see NullPointerException,
I suspect something with the Queue. You code is running in my
environment.
If you could, please provide info on how the queue
carnotaq.carnotqueue was created (pl/sql, java api calls, etc.).
Make sure that carnotaq.carnotqueue is a type that can contain
object message payloads.
Here is the PL/SQL code I used to create the queue. You may want
to try this to see if error remains.
---- start pl/sql script ----
-- drop queue
CONNECT carnotaq/carnotaq;
execute dbms_aqadm.drop_queue_table( queue_table => 'CARNOTQUEUE', force => true
-- create queue
execute dbms_aqadm.create_queue_table( queue_table => 'CARNOTQUEUE', queue_paylo
ad_type => 'SYS.AQ$_JMS_OBJECT_MESSAGE', comment => 'single-consumer, default so
rt ordering, Obj Message', compatible => '8.1.0' );
execute dbms_aqadm.create_queue( queue_name => 'CARNOTQUEUE', queue_table => 'C
ARNOTQUEUE');
-- start queue
execute dbms_aqadm.start_queue(queue_name => 'CARNOTQUEUE');
---- end of pl/sql script ----