Advanced Queuing - Oracle

Dequeuing a Message from a Single-Consumer Queue [SpecifyOptions]
Examples
See Chapter 3, "AQ Programmatic Environments" for a list of available functions in
each programmatic environment. Examples in the following programmatic
environments are provided:
PL/SQL (DBMS_AQ Package): Dequeue of Object Type Messages on page 11-49
Java (JDBC): Dequeue a message from a single-consumer queue (specify
options) on page 11-49
Visual Basic (OO4O): Dequeue a message on page 11-50
PL/SQL (DBMS_AQ Package): Dequeue of Object Type Messages
/* Dequeue from msg_queue: */
DECLARE
dequeue_options dbms_aq.dequeue_options_t;
message_properties dbms_aq.message_properties_t;
message_handle RAW(16);
message aq.message_typ;
BEGIN
DBMS_AQ.DEQUEUE(
queue_name => ’msg_queue’,
dequeue_options => dequeue_options,
message_properties => message_properties,
payload => message,
msgid => message_handle);
DBMS_OUTPUT.PUT_LINE (’Message: ’ || message.subject ||
’ ... ’ || message.text );
COMMIT;
END;
Java (JDBC): Dequeue a message from a single-consumer queue (specify
options)
/* Dequeue a message with correlation id = ’RUSH’ */
public static void example(AQSession aq_sess) throws AQException, SQLException
{
AQQueue queue;
AQMessage message;
AQRawPayload raw_payload;
AQDequeueOption deq_option;
byte[] b_array;
Connection db_conn;
Operational Interface: Basic Operations 11-49