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Integrating with Oracle Advanced Queuing
Use dbms_AQadm.Create_Queue_Table to create the physical table in the
database. You must pass it a name for the table and a name for the object type that will
define the message for this queue.
For example:
…
execute dbms_AQadm.Create_Queue_Table
(queue_Table=>'queuename._tab',
queue_Payload_Type=>'SRW_PARAMLIST_OBJECT',
compatible=>'9.0');
In earlier examples, we created the object type SRW_PARAMLIST_OBJECT that
encapsulates the SRW_PARAMLIST type in object notation so it can be used as a
message.
After creating the queue table, you must create the queue with dbms_
AQadm.Create_Queue and start the queue with dbms_AQadm.Start_Queue.
For example:
…
execute dbms_AQadm.Create_Queue
(Queue_Name=>'queuename',Queue_Table=>'queuename._tab');
prompt … starting queue
execute dbms_AQadm.Start_Queue
(Queue_Name=>'queuename');
…
Having created and started the queue, what you need now is a procedure that creates
a message in this queue and a procedure that reads out the queue and submits the job
to the server. These are discussed in the following sections.
17.4.2 Creating the Enqueuing Procedure
The enqueuing procedure is responsible for putting a message into the queue. This
procedure can be part of your application, called by a database-trigger, or provided via
an external mechanism. In this section, we will provide an example of creating a stored
procedure that puts a simple message in this queue.
Because our message is the parameter list itself, the procedure is fairly easy. We use the
same code we used in earlier sections to create a parameter list. In addition to the
variables we used, we define an object variable to hold the message we will put into
the queue.
…
…
Note: You'll find a complete example for setting up, creating, and
starting a simple queue in the demo file srwAQsetup.sql,
included with your OracleAS Reports Services installation.
plist_object SRW_ParamList_Object;
After creating the parameter list we create the actual message object using the object
constructor.
…
plist_object := SRW_PARAMLIST_OBJECT(plist);
…
17-8 Oracle Application Server Reports Services Publishing Reports to the Web