PL/SQL Callback notification with aq$_jms_text_message

Question

Hi,
i want to set up a notfication for a pl/sql callback procedure. The message in my queue is enqueued via propagation from another instance. This is my setup (using oracle 10.2.0.3):
-------- the queue (multiconsumer): --------------
begin
dbms_aqadm.create_queue_table(queue_table => 'zmon_evt_in_qtable',queue_payload_type => 'sys.aq$_jms_text_message', multiple_consumers => true);
dbms_aqadm.create_queue(queue_name => 'zmon_evt_in_queue',queue_table => 'zmon_evt_in_qtable' );
dbms_aqadm.start_queue( queue_name =>'zmon_evt_in_queue' );
end;
-------- the callback-procedure (simply inserting an entry in a table called 'test'): --------------
create or replace procedure evt_in_callback(
context IN RAW,
reginfo IN SYS.AQ$_REG_INFO,
descr IN SYS.AQ$_DESCRIPTOR,
payload IN VARCHAR2,
payloadl IN NUMBER) is
begin
insert into test(textfeld) values ('RECEIVED!');
commit;
end evt_in_callback;
-------- the subscriber: --------------
begin
dbms_aqadm.add_subscriber(queue_name => 'zmon.zmon_evt_in_queue',
subscriber => sys.aq$_agent('zmon_evt_in_subscriber',null,null));
end;
-------- the notification: --------------
declare
reginfo sys.aq$_reg_info;
reg_list sys.aq$_reg_info_list;
begin
reginfo := sys.aq$_reg_info(name => 'zmon.zmon_evt_in_queue:zmon_evt_in_subscriber',
namespace => DBMS_AQ.NAMESPACE_AQ,
callback => 'plsql://zmon.evt_in_callback',
context => HEXTORAW('FF')
reg_list := sys.aq$_reg_info_list(reginfo);
DBMS_AQ.REGISTER(reg_list => reg_list,
reg_count => 1);
end;
The callback-procedure is not fired on arrival of a message in the queue. But i can see the the appropriate notfication-entry in sys.reg$.
Any suggestions why this doesn't work ?
BTW: can anybody tell me the meaning of the context-Parameter in the aq$_reg_info-Type ? Everybody uses HEXTORAW('FF'), but I don't understand what that means...
Jens
Edited by: dschenzl on Jun 4, 2009 11:13 AM

Answer 1

Finally, it's done.
The subscriber used in the propagation has to be the notification-subscriber (zmon_evt_in_subscriber). I used another subscriber, which was not registered for notification.
I found the solution in this thread: Callback trouble from mesage via propagated message.
Two days filled up with frustrating work - man, how i hate that...
Greetings to the community,
Jens