public class MyEngine extends SimpleEngine {
private transient PersistenceManager persistenceManager;
public synchronized PersistenceManager getPersistenceManager() {
if (persistenceManager == null) {
persistenceManager = new PersistenceManager();
}
return persistenceManager;
}
private static final SimpleDateFormat MY_DATE_FORMAT =
new SimpleDateFormat("dd MM yyyy");
public DateFormat getDateFormat() {
return MY_DATE_FORMAT;
}
}
Alternatively you can store global objects in the ServletContext. To access the ServletContext override the Engine.service() method:
public class MyEngine extends SimpleEngine {
private static final String PM_KEY = "MyEngine.PersistenceManager";
private transient PersistenceManager persistenceManager;
/** @see IEngine#service(RequestContext) */
public boolean service(RequestContext context) throws
ServletException, IOException {
// If not initialized lookup in ServletContext
if (persistenceManager == null) {
ServletContext servletContext =
context.getServlet().getServletContext();
persistenceManager = servletContext.getAttribute(PM_KEY);
// If not found, create and add to ServletContext
if (persistenceManager == null) {
persistenceManager = new PersistenceManager();
servletContext.setAttribute(PM_KEY, persistenceManager);
}
}
super.service(context);
}
public PersistenceManager getPersistenceManager() {
return persistenceManager;
}
}
regard Malcolm Edgar
From: Eric Everman <[EMAIL PROTECTED]>
To: [EMAIL PROTECTED]
Subject: [Tapestry-developer] Global References
Date: Mon, 21 Oct 2002 21:09:22 -0500
I'm still coming up to speed on Tapestry and I have a general question: Where can I store a global reference that can be accessed by all Visit objects? I need to store a shared reference to a Hibernate SessionFactory so that all Visit objects can access the persistence layer.
Also, is there a good example of the use of ListEdit somewhere (that doesn't involve EJB)?
Thanks,
Eric Everman
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