Advanced Queuing - Oracle

Using HTTP to Access the AQ XML Servlet
NUMBER01
2000-08-23 0:0:0
4. The client sends an HTTP POST to the servlet at the remote server.
See the $ORACLE_HOME/demo directory for sample code of POST requests
using HTTP.
AQ Servlet Processes a Request Using HTTP
1. The server accepts the client HTTP(S) connection.
2. The server authenticates the user (AQ agent) specified by the client.
3. The server receives the POST request.
4. The AQ servlet is invoked.
If this is the first request being serviced by this servlet, the servlet is
initialized—its init() method is invoked. The init () method creates a
connection pool to the Oracle server using the AQxmlDataSource parameters
(SID, host, port, AQ servlet super-user name, password) provided by the client.
5. The servlet processes the message as follows:
If this is the first request from this client, a new HTTP session is created.
The XML message is parsed and its contents are validated. If a session ID is
passed by the client in the HTTP headers, then this operation is performed
in the context of that session. This is described in detail in the next section.
The servlet determines which object (queue and topic) the agent is trying to
perform operations on:
For example, in the client request (step 3 in "AQ Client Request to the AQ
Servlet Using HTTP"), the agent JOHN is trying to access OE.OE_NEW_
ORDERS_QUE.
The servlet looks through the list of database users that map to this AQ
agent (using the AQ$INTERNET_USERS view). If any one of these db_
17-60 Oracle9i Application Developer’s Guide - Advanced Queuing