Some of the messages aren't dequeued using JMS/AQ

Question

Hi.
I am having strange problems dequeuing messages from an Oracle9i Release 2 database. I have a trigger that sends a message everytime a table is updated. When I have SQL worksheet and update the table through a SQL statement then I only recieve about 50-70% of the events. When I use Oracle Enterprise Manager Console I can see the rest of the messages are lying in the queue as 'READY'.
I need this to be VERY reliable so if anyone have any ideas I would really appreciate it. I used PL/SQL in the DB because of the speed increase but maybe a Java Stored Procedure will work better? I have included the code in question below.
Best regards
Christer Nordvik
JAVA code
//get a DB connection to use with JMS
dbconn = prevision.database.DBPool.getConnection();
//try to estabilish a connection to the JMS server to recieve alarm updates
tconn = AQjmsTopicConnectionFactory.createTopicConnection(dbconn);
/* Create a Topic Session */
tsess = (AQjmsSession)tconn.createTopicSession(true, Session.DUPS_OK_ACKNOWLEDGE);
tconn.start();
topic = ((AQjmsSession)tsess).getTopic("TS",strTopic) ;
tsub1 = tsess.createDurableSubscriber(topic, "T");//unique id
while (!done)
//waits forever
logger.debug("Waiting for alarms...");
dtxtmsg = (TextMessage)(tsub1.receive());
//found a message
logger.debug("Recieved alarm " + dtxtmsg.getText());
PL/SQL code
AS
BEGIN
DECLARE
Enqueue_options DBMS_AQ.enqueue_options_t;
Message_properties DBMS_AQ.message_properties_t;
Message_handle RAW(16);
User_prop_array SYS.AQ$_JMS_USERPROPARRAY;
Agent SYS.AQ$_AGENT;
Header SYS.AQ$_JMS_HEADER;
Message SYS.AQ$_JMS_TEXT_MESSAGE;
Message_text VARCHAR2(100);
gt1 number;
BEGIN
Message_properties.expiration := 3600; --Set the time to live for the message
gt1:= DBMS_UTILITY.GET_TIME;
Agent := SYS.AQ$_AGENT('',NULL,0);
User_prop_array := SYS.AQ$_JMS_USERPROPARRAY();
Header := SYS.AQ$_JMS_HEADER( Agent, '', 'aq1', '', '', '', User_prop_array);
Message_text := 'Message 1 from PL/SQL';
Message := SYS.AQ$_JMS_TEXT_MESSAGE(Header, LENGTH(Message_text), Message_text, NULL);
--setting the id of the sender
Message_properties.correlation := 'tst';
--Message_properties.correlation := gt1;         
DBMS_AQ.ENQUEUE(queue_name => 'ts.tstopic',
Enqueue_options => enqueue_options,
Message_properties => message_properties,
Payload => message,

Answer 1

I figured it out. Was something wrong with the trigger in the DB...