About Message Notifications

Oracle Streams Advanced Queuing (AQ) can notify an application and users when a message of interest is enqueued. Notifications enable applications and users to do their work without constantly checking a queue for new messages. Notifications can be sent to an application using PL/SQL, Java Message Service (JMS), or Oracle Call Interface (OCI) callback functions. Notification can also be sent to a specified e-mail address or HTTP post. In addition, notifications can be presented in either RAW data type form or XML form. Applications and users do not need to be connected to a database to receive notifications. When they are notified that a message of interest has appeared in a queue, they can connect to the database and check the queue.