Enqueuing refers to sending a message to a queue and dequeuing refers to receiving one. A client application can create a message, set the desired properties on it and enqueue it by storing the message in the queue, a table in the database. When dequeuing a message, an application can either dequeue it synchronously by calling the dequeue method on the connection, or asynchronously by waiting for a notification from the database (see the registerAQNotification method on the database).
| Interface | Description |
|---|---|
| AQAgent |
An Agent represents and identifies a user of the queue, either producer or consumer of the message, either an end-user or an application.
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| AQMessage |
A message is the unit that is enqueued or dequeued.
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| AQMessageProperties |
This interface contains the message properties such as Correlation, Sender, Delay and Expiration, Recipients, and Priority and Ordering.
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| AQNotificationListener |
The listener interface for receiving AQ notification events.
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| AQNotificationRegistration |
This class represents your interest in being notified when a new message is enqueued in a particular queue.
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| Class | Description |
|---|---|
| AQDequeueOptions |
Specifies the options available for the dequeue operation.
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| AQEnqueueOptions |
Specifies the options available for the enqueue operation.
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| AQFactory |
Factory class for AQ.
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| AQNotificationEvent |
An AQNotificationEvent will be created whenever a new message is enqueued in a queue for which you have registered your interest (see OracleConnection.registerAQNotification).
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