Troubles in message propagation

Question

Hi, guys.
I really need you to help me out.
I am using Oracle 9i and want to make JMS propagation work. I have read all postings
here and Oracle 9i Application developer's guide-Advanced Queuing (especially 12-81)
I still could not get it working properly.
Here is the story. I have two schemas. One is for source DB and another is for destination
DB.I created RemoteSubscriber before I published message to destimation Topic in my
source side (dblink is destinnation_schema.destination_topic_name@dblinkName),It works fine.
However I did not see any received messages on my destination side.
According to some suggestions in this forum, I did something like by adding attributes
in itit.ora ,such as job_queue_process and AQ_TM_PROCESS.
Here is my testing code segment.
import java.util.*;
import java.sql.*;
import javax.jms.*;
import oracle.AQ.*;
import oracle.jms.*;
public class PublisherToRemoteSubscriberPropagationMode extends Thread {
String topicName = null;
TopicConnection topicConnection = null;
TopicSession topicSession = null;
Topic topic = null;
TopicPublisher topicPublisher = null;
AQjmsAgent[] remoteSubscriber = null;
ObjectMessage objMsg = null;
ArrayList list = null;
JMSUtil jmsUtil = null;
public PublisherToRemoteSubscriberPropagationMode(ArrayList list) {
try{
this.list = list;
jmsUtil = JMSUtil.getInstance();
//get a publisher topic connection as visionaq/visionaq
topicConnection = jmsUtil.createTopicConnection();
//start publisher topic connection explicitly.
topicConnection.start();
// get publisher topicSession object via topicCopnnection object.
topicSession = jmsUtil.createTopicSession(topicConnection);
//get publisher topic handler.
topic = ((AQjmsSession)topicSession).getTopic(AQJmsConfig.getAQUserName(),AQJmsConfig.getDefaultJmsTopicName());
if(this.createRemoteSubscriber(topicSession)){
System.out.println("Created a remote subscriber successfully");
}else{
System.out.println("Failed to create Remote Subscriber!!!");
System.exit(1);
//start this topic
((AQjmsDestination)topic).start(topicSession,true,true);
topicPublisher = ((AQjmsSession)topicSession).createPublisher(topic);
objMsg = topicSession.createObjectMessage();
}catch(Exception je){
je.printStackTrace();
public boolean createRemoteSubscriber(TopicSession topicSession){
// the first parameter is name of agent, the second is dbLink Name.
try{
/////////// this first parameter is the name of this remote subscriber//
/////////// if you want to publish messages to all remote subscribers //
/////////// simply set name as null. //
////////////the second parameter is Address, it is format is //
////////////(remote_DB_schema).(remote_topic_name)@dblink_from //
String dbLinkName = "rmeoteDBSchemaName.remoteTestTopicTemp@dbLinkName";
remoteSubscriber = new AQjmsAgent[1];
remoteSubscriber[0] = new AQjmsAgent("test",dbLinkName);
//create a remote subscriber without message selector.
((AQjmsSession)topicSession).createRemoteSubscriber(topic,remoteSubscriber[0],null);
// remote subscriber setup is done.
System.out.println("create the RemoteSubscriber under this topic successfully.");
}catch(SQLException se){
se.printStackTrace();
return false;
}catch(JMSException je){
je.printStackTrace();
return false;
return true;
public void run(){
System.out.println("Start to publish message...");
for(;;){
try{
objMsg.setObject(this.list);
((AQjmsTopicPublisher)topicPublisher).publish(topic,objMsg,remoteSubscriber);
//topicPublisher.publish(topic,objMsg);
topicSession.commit();
System.out.println(list.size() + " messages are published to the Topic successfully");
try{
System.out.println("sleep for a while and wait for other message to be published..");
this.sleep(6000);
}catch(InterruptedException ie){
ie.printStackTrace();
topicSession.rollback();
}catch(JMSException je){
je.printStackTrace();
try{
topicSession.rollback();
}catch(JMSException jme){
jme.printStackTrace();
Here is my Topic Receiver.
import java.util.*;
import java.sql.*;
import javax.jms.*;
import oracle.AQ.*;
import oracle.jms.*;
public class RemoteSubscriberPropagationMode extends Thread {
TopicConnection topicConnection = null;
TopicSession topicSession = null;
Topic topic = null;
TopicReceiver receiver = null;
ObjectMessage objMsg = null;
MessageQueueListener listener = null;
JMSUtil jmsUtil = null;
public RemoteSubscriberPropagationMode() {
try{
//set up remote subscriber properties.
jmsUtil = JMSUtil.getInstance();
// setup env for remote subscriber
String remoteUser = AQJmsConfig.getRemoteAQSubscriberUserName();
String remotePassword = AQJmsConfig.getRemoteAQSubscriberPassword();
String remoteDbUrl = AQJmsConfig.getAQRemoteDbUrl();
String remoteTopicName = AQJmsConfig.getRemoteTopicName();
//create a remote subscriber connection.
topicConnection = jmsUtil.createTopicConnection(remoteUser,remotePassword,remoteDbUrl);
//start remote subscriber connection.
topicConnection.start();
//create remote topic session.
topicSession = jmsUtil.createTopicSession(topicConnection);
// get remote Topic
topic = ((AQjmsSession)topicSession).getTopic(remoteUser,remoteTopicName);
// get a specified remote receiver for "test"
receiver = ((AQjmsSession)topicSession).createTopicReceiver(topic,"test",null);
}catch(Exception je){
je.printStackTrace();
public void run(){
try{
for(;;){
// by using the following receive(), I got JMS-102 error.
// (feature Not Support)
// objMsg = (ObjectMessage)receiver.receive();
// System.out.println("Receiving objectMessage in RemoteSubscriber....");
listener = new MessageQueueListener(topicSession);
receiver.setMessageListener(listener);
System.out.println("Queue Message Listener is listening for test next published message ...");
try{
//sleep for a while...
sleep(6000);
}catch(InterruptedException ie){
ie.printStackTrace();
try{
jmsUtil.cleanUpTopic(topicSession,topicConnection);
}catch(VisionLinkAQJmsException je){
je.printStackTrace();
topicSession.rollback();
System.exit(1);
}catch(JMSException je){
je.printStackTrace();
public static void main(String [] args) throws Exception{
RemoteSubscriberPropagationMode sub = new RemoteSubscriberPropagationMode();
sub.start();
Please tell me what is wrong? If you guy made JMS propagation working , please show me
your testing code segment, Highly appreciate you!!!
kindest regards,
Jian lin
[email protected]

Answer 1

Bhagat:
According to your tips:
1. Add the following to the init.ora
job_queue_processes=4
aq_tm_processes=1
---> I did that already, my settings are
job_queue_processes=4
aq_tm_processes=3
2. Check the log directory to see if there are any ora or j00 trace files.
---> yes, I saw them. but alaways display message:"connection description for remote database not found".
3. Also, have the queues on the remote site been started.
--> yes, I called
(AQjmsDestination)topic).start(topicSession,true,true);
4. Check if propagation has been schedule from the source queue to the destination dblink.
--> it really did message propagation from source topic.
here is my dblink:
String dbLinkName = "[email protected]";
(it works when I used SQLPlus to query tables.)
here is my publisher code segments:
remoteSubscriber = new AQjmsAgent("jian",dbLinkName);
((AQjmsSession)topicSession).createRemoteSubscriber(topic,remoteSubscriber,null);
// remote subscriber setup is done.
System.out.println("create the RemoteSubscriber (jian) under this topic successfully.");
//schedule the message propagartion to remote Subscriber
((AQjmsDestination)topic).schedulePropagation(topicSession,dbLinkName,null,new Double(5*60),null,new Double(0));
System.out.println("Scheduled message Progagartion successfully.");
objMsg.setObject(this.list);
((AQjmsTopicPublisher)topicPublisher).publish(topic,objMsg);
Thanks for your further suggestion.
sincerely,
jian.L