Sending message from oracle to middleware through oracle messaging gateway

Question

Hi,
I am very new to oracle AQ and oracle messaging gateway. I am actually trying to propagate a message from oracle to middleware through oracle messaging gateway.
I have created the link between oracle messaging gateway and middleware(IBM Websphere).
1.*Created an object type with a single attribute of type sys.xmltype*.
create or replace type xpctas_type as object(payload sys.xmltype);
2.*Created a qtable with payload type as xpctas_type, a queue and started the queue.*begin
dbms_aqadm.create_queue_table(
queue_table => 'xpctas_qtab',
queue_payload_type => 'xpctas_type',
multiple_consumers => TRUE
dbms_aqadm.create_queue(queue_name =>'xpctas_q',
queue_table => 'xpctas_qtab',
max_retries => 16);
dbms_aqadm.start_queue('xpctas_q');
end;
3.*Created a transformation that converts user defined type xpctas_type to messaging gateway canonical type sys.MGW_BASIC_MSG_T.*
For this I created a function that converts xpctas_type to messaging gateway canonical type sys.MGW_BASIC_MSG_T.
CREATE OR REPLACE FUNCTION APPS.order_2_basic(my_order in xpctas_type)
RETURN sys.mgw_basic_msg_t
IS
v_xml XMLTYPE;
v_text varchar2(4000);
v_clob CLOB;
v_basic sys.mgw_basic_msg_t;
text_body sys.mgw_text_value_t;
header     sys.mgw_name_value_array_t;
BEGIN
v_xml := XMLTYPE.createXML(my_order,NULL,NULL);
v_basic := sys.mgw_basic_msg_t.construct;
header := sys.mgw_name_value_array_t(sys.mgw_name_value_t.construct_integer('MGW_MQ_characterSet','1208'),
sys.mgw_name_value_t.construct_integer('MGW_MQ_priority', '7'));
IF(LENGTH(v_xml.getstringval())>0 AND LENGTH(v_xml.getstringval())<=4000) THEN
v_text := v_xml.getStringVal();
text_body := sys.mgw_text_value_t(v_text,NULL);
ELSE
dbms_lob.createtemporary(v_clob,TRUE,dbms_lob.session);
v_clob:=v_xml.getClobVal();
text_body := sys.mgw_text_value_t(NULL,v_clob);
dbms_lob.freetemporary(v_clob);
END IF;
v_basic:=sys.mgw_basic_msg_t(header,text_body,NULL);
RETURN v_basic;
END order_2_basic;
begin
dbms_transform.create_transformation(
schema => 'apps',
name => 'order_to_basic',
from_schema => 'apps',
from_type => 'xpctas_type',
to_schema => 'sys',
to_type => 'mgw_basic_msg_t',
transformation => 'Apps.order_2_basic(source.user_data)');
end;
4.     Registered a foreign queue.
declare
v_options sys.mgw_properties;
gv_mq_queue_name VARCHAR2(32);
begin
gv_mq_queue_name := 'MB.O2C.SOFTWARESOLUTION';
v_options := sys.mgw_properties(
sys.mgw_property('MQ_openOptions', '2066') );
dbms_mgwadm.register_foreign_queue(
name => 'destq', -- MGW foreign queue name
linkname => 'mqlink', -- name of link to use
provider_queue => RTRIM(gv_mq_queue_name), -- name of MQSeries queue
domain => dbms_mgwadm.DOMAIN_QUEUE, -- single consumer queue
options => v_options );
end;
5.     Added a subscriber with transformation.
begin
dbms_mgwadm.add_subscriber(
subscriber_id => 'sub_aq2mq', -- MGW subscriber name
propagation_type => dbms_mgwadm.outbound_propagation,
queue_name => 'apps.xpctas_q',
destination => 'destq@mqlink',
transformation => 'apps.order_to_basic');
end;
6.     Added a scheduler
begin
dbms_mgwadm.schedule_propagation(
-- schedule name
schedule_id => 'sch_aq2mq',
-- outbound propagation
propagation_type => dbms_mgwadm.outbound_propagation,
-- AQ queue name
source =>'apps.xpctas_q',
-- MGW foreign queue with link
destination =>'destq@mqlink');
-- The remaining fields currently not used by MGW
end;
7.     Enqueued a user defined data type into the qtable.
declare
l_xmlstring varchar2(2000);
l_payload sys.xmltype;
my_order xpctas_type;
enqueue_options DBMS_AQ.enqueue_options_t;
message_properties DBMS_AQ.message_properties_t;
msgid RAW( 16 );
v_num Number;
begin
SELECT '<?xml version="1.0" encoding="UTF-8" ?>
<Q1:XXRFG_PRCS_CNCT_TO_ASSETS_STG xmlns:Q1="http://www.ibm.com/websphere/crossworlds/2002/BOSchema/XXRFG_PRCS_CNCT_TO_ASSETS_STG" version="3.0.0" verb="Create" locale="en_US.UTF-8" delta="false">
<Q1:STAGING_ID>221</Q1:STAGING_ID>
<Q1:SW_INSTANCE_ID>18595755</Q1:SW_INSTANCE_ID>
<Q1:MC_INSTANCE_ID>194734</Q1:MC_INSTANCE_ID>
<Q1:OPCO>NUK</Q1:OPCO>
<Q1:RELATIONSHIP_FLAG>N</Q1:RELATIONSHIP_FLAG>
<Q1:RELATIONSHIP_TYPE>Connected To</Q1:RELATIONSHIP_TYPE>
<Q1:ObjectEventId />
</Q1:XXRFG_PRCS_CNCT_TO_ASSETS_STG>'
INTO l_xmlstring
FROM dual;
SELECT XMLTYPE(l_xmlstring)
INTO l_payload
FROM dual;
my_order:=xpctas_type(l_payload);
dbms_output.put_line(my_order.payload.getstringval());
DBMS_AQ.enqueue( queue_name => 'APPS.xpctas_q',
enqueue_options => enqueue_options,
message_properties => message_properties,
payload => my_order,
msgid => msgid
COMMIT;
END;
As soon as I enqueued the message the subscriber picked the message and sent it to middleware. I found the below message in the middleware
MD            ÿÿÿÿ      ¸  MQSTR         AMQ HBU473QC61  PTÀ+H^                                                                            HBU473QC61                                      mqm                                                                                                        2012112109335869                                       ÿÿÿÿ
*<XPCTAS_TYPE><PAYLOAD><Q1:XXRFG_PRCS_CNCT_TO_ASSETS_STG xmlns:Q1="http://www.ibm.com/websphere/crossworlds/2002/BOSchema/XXRFG_PRCS_CNCT_TO_ASSETS_STG" version="3.0.0" verb="Create" locale="en_US.UTF-8" delta="false">*
*<Q1:STAGING_ID>221</Q1:STAGING_ID>*
*<Q1:SW_INSTANCE_ID>18595755</Q1:SW_INSTANCE_ID>*
*<Q1:MC_INSTANCE_ID>194734</Q1:MC_INSTANCE_ID>*
*<Q1:OPCO>NUK</Q1:OPCO>*
*<Q1:RELATIONSHIP_FLAG>N</Q1:RELATIONSHIP_FLAG>*
*<Q1:RELATIONSHIP_TYPE>Connected To</Q1:RELATIONSHIP_TYPE>*
*<Q1:ObjectEventId/>*
*</Q1:XXRFG_PRCS_CNCT_TO_ASSETS_STG>*
*</PAYLOAD></XPCTAS_TYPE>*
It has some junk data in the begining. How can I remove this junk data?? Any help provided on this would be of great help.
Experts on oracle mesaging gateway and AQ, Please help.
Thanks & Regards,
Sachin

Answer 1

Hello,
your setup of the message gateway seems to be ok.
Did you check the corresponding versions of the client libraries (*.jar) ? These are the libraries on
db server side (e.g. aqapi.jar, based on your CLASSPATH entries in file "mgw.ora") and for the IBM MQ jars.
Kind regards,
WoG