Advanced Queuing - Oracle

Customizing the AQ Servlet
setStyleSheet("text/xsl",
"http://sun-248:8000/stylesheets/bookOrder.xsl");
}
catch (Exception ex)
{
System.out.println("Exception in init: " + ex);
}
}
Callbacks Before and After AQ Operations
Using the AQ servlet, you can register callbacks that will be invoked before and
after AQ operations are performed. This allows users to perform AQ and non-AQ
operations in the same transaction.
To receive callbacks, users register an object that implements the
oracle.AQ.xml.AQxmlCallback interface. The AQxmlCallback interface has
the following methods:
public interface AQxmlCallback
{
/** Callback invoked before any AQ operations are performed by the servlet */
public void beforeAQOperation(HttpServletRequest request, HttpServletResponse
response,
AQxmlCallbackContext ctx);
/** Callback invoked after any AQ operations are performed by the servlet */
public void afterAQOperation(HttpServletRequest request, HttpServletResponse
response,
AQxmlCallbackContext ctx);
}
The callbacks are passed in the HTTP request and response streams and an
AQxmlCallbackContext object. The object has the following methods:
The java.sql.Connection getDBConnection() method gives a handle
to the database connection that is used by the servlet for performing AQ
operations. Users can perform other SQL operations in the callback functions
using this connection object.
Note that you cannot call close(), commit() or rollback() methods
on this connection object.
org.w3c.org.Document parseRequestStream() gives a DOM document
representing the parsed request stream.
17-68 Oracle9i Application Developer’s Guide - Advanced Queuing