Advanced Queuing - Oracle

Customizing the AQ Servlet
The void setStyleSheet(String type,String href)method allows
the user to set the style sheet for a particular call. So instead of specifying a
single style sheet for all responses from this servlet, users can set style sheets for
specific responses.
The style sheet specified in the callback overrides the style sheet (if any)
specified for the servlet in the init() method
Example
Before any AQ operation in the servlet, you want to insert a row in the EMP table.
Do this by creating a callback class and associating it with a particular servlet as
follows:
import javax.servlet.*;
import javax.servlet.http.*;
import oracle.AQ.xml.*;
import java.sql.*;
import javax.jms.*;
/**
* This is a sample AQ Servlet callback
*/
public class TestCallback implements oracle.AQ.xml.AQxmlCallback
{
/** Callback invoked before any AQ operations are performed by the servlet */
public void beforeAQOperation(HttpServletRequest request, HttpServletResponse
response,
AQxmlCallbackContext ctx)
{
Connection conn = null;
System.out.println("Entering BeforeAQ Callback ...");
try
{
// Get the connection object from the callback context
conn = ctx.getDBConnection();
// Insert value in the EMP table
PreparedStatement pstmt =
conn.prepareStatement ("insert into EMP (EMPNO, ENAME) values (100,
’HARRY’)");
pstmt.execute ();
pstmt.close();
Internet Access to Advanced Queuing 17-69