Advanced Queuing - Oracle

Enqueuing and Dequeuing Of Messages
}
/* Dequeue a message: */
message = queue.dequeue(deq_option);
/* Retrieve raw data from the message: */
raw_payload = message.getRawPayload();
b_array = raw_payload.getBytes();
String ret_value = new String(b_array);
System.out.println("Dequeued message: " + ret_value);
db_conn.commit();
Enqueuing and Dequeuing of Messages by Priority Using PL/SQL
When two messages are enqued with the same priority, the message which was
enqued earlier will be dequeued first. However, if two messages are of different
priorities, the message with the lower value (higher priority) will be dequeued first.
/* Enqueue two messages with priority 30 and 5: */
DECLARE
enqueue_options dbms_aq.enqueue_options_t;
message_properties dbms_aq.message_properties_t;
message_handle RAW(16);
message aq.message_typ;
BEGIN
message := message_typ(’PRIORITY MESSAGE’,
’enqued at priority 30.’);
message_properties.priority := 30;
DBMS_AQ.ENQUEUE(queue_name => ’priority_msg_queue’,
enqueue_options => enqueue_options,
message_properties => message_properties,
payload => message,
msgid => message_handle);
message := message_typ(’PRIORITY MESSAGE’,
’Enqueued at priority 5.’);
message_properties.priority := 5;
A-30 Oracle9i Application Developer’s Guide - Advanced Queuing