Advanced Queuing - Oracle

The servlet parses the content of the IDAP document and uses the AQ Java API
to perform the designated operation. On completion of the call, the servlet
formats either a response or an error response as indicated by IDAP and sends
it back to the client.
IDAP is transport independent and therefore can work with other transport
protocols transparently. Oracle9i supports HTTP and SMTP; other proprietary
protocols can also be supported using the callout mechanism through
transformations.
Advanced Queuing Security over the Internet
AQ functionality allows only authorized Internet users to perform AQ
operations on AQ queues. An Internet user connects to a Web server, which in
turn connects to the database using an application server. The Internet user
doing the operation is typically not the database user connected to the database.
Also, the AQ queues may not reside in the same schema as the connected
database user. Advanced Queuing uses proxy authentication so that only
authorized Internet users can perform AQ operations on AQ queues.
LDAP Integration
OID Integration: To leverage LDAP as the single point for managing generic
information, Advanced Queuing is integrated with the Oracle Internet
Directory (OID) server. This addresses the following requirements:
Global topics (queues): AQ queue information can be stored in an OID
server. OID provides a single point of contact to locate the required topic or
queue. Business applications (users) looking for specific information need
not know in which database the queue is located. Using the industry
standard Java Messaging Service (JMS) API, users can directly connect to
the queue without explicitly specifying the database or the location of the
topic or queue.
Global events: OID can be used as the repository for event registration.
Clients can register for database events even when the database is down.
This allows clients to register for events such as “Database Open,” which
would not have been possible earlier. Clients can register for events in
multiple databases in a single request.
XML Integration: XML has emerged as a standard for e-business data
representations. The XMLType datatype has been added to the Oracle server to
support operations on XML data. AQ not only supports XMLType data type
payloads, but also allows definitions of subscriptions based on the contents of
an XML message. This is powerful functionality for online market places where
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