I have a legacy app that I am replacing with Wicket. It has to be done over
time, so I can't do a wholesale rewrite of the app. I have Wicket as the
"main" framework and my legacy, homemade framework will be the secondary.
The few Wicket/Databinder pages that I have work pretty well. My legacy
pages are data-oriented as well and I was planning on a partial rewrite of
the legacy data tier to use Hibernate instead of pure JDBC.
My problem comes in when I try and access the Hibernate Session from my
legacy data-tier. I call DataStaticService.getHibernateSession();, but I
get this exception:
[code]
org.hibernate.HibernateException: No session currently bound to execution
context
at
org.hibernate.context.ManagedSessionContext.currentSession(ManagedSessionContext.java:50)
at
org.hibernate.impl.SessionFactoryImpl.getCurrentSession(SessionFactoryImpl.java:542)
at
net.databinder.DataStaticService.getHibernateSession(DataStaticService.java:45)
[/code]
I know on the surface this looks like a Datbinder question, but I think it
may be deeper than that. I believe I am getting this because the
WicketFilter (and therefore the RequestCycle processing) isn't happening for
my legacy pages. So I thought that I could write my own filter that would
attempt to do the RequestCycle stuff, but I'm afraid it is currently a
little overwhelming. Before I really dig in, does that seem to be a good
approach? I am thinking that if I can use Wicket to somehow process the
requests of my legacy app I can get the benefits of Wicket without having to
rewrite everything upfront.
When I made my first attempt at my own filter, it literally was a capture of
the WicketFilter doGet method (with some minor mods.
public void doFilter(ServletRequest servletRequest, ServletResponse
servletResponse,
FilterChain chain) throws IOException, ServletException {
HttpServletRequest httpServletRequest = (HttpServletRequest)
servletRequest;
HttpServletResponse httpServletResponse = (HttpServletResponse)
servletResponse;
String url = httpServletRequest.getRequestURI();
if (url.contains(".jsp")) {
log.info("AIMSFilter.doFilter(): " + url);
final WebApplication webApplication = (WebApplication)
Application.get("aimsWicket");
// Create a new webrequest
final WebRequest request =
webApplication.newWebRequest(httpServletRequest);
// First, set the webapplication for this thread
Application.set(webApplication);
// Get session for request
final WebSession session = webApplication.getSession(request);
RequestCycle cycle = RequestCycle.get();
if (cycle == null) {
// Create a response object and set the output encoding
according to
// wicket's application setttings.
final WebResponse response =
webApplication.newWebResponse(httpServletResponse);
response.setAjax(request.isAjax());
response.setCharacterEncoding(webApplication.getRequestCycleSettings().getResponseRequestEncoding());
try {
cycle = session.newRequestCycle(request, response);
try {
// Process request
cycle.request();
}
catch (AbortException e) {
// noop
}
}
finally {
// Close response
response.close();
// Clean up thread local session
Session.unset();
// Clean up thread local application
Application.unset();
}
}
}
chain.doFilter(servletRequest, servletResponse);
}
What ended up happening was the MainPage/getHomePage() class was included in
the response. I'm not comepletely sure that that description is accurate
because I don't have a lot of scenarios to test for proof, but that is what
I see on the screen and that was the pageClass that I saw in
DefaultResponseStrategy.respond on the requestCycle.getRequestTarget().
Ultimately, I want to be able to do similar processing that takes place for
Wicket Pages when I request one of my legacy pages. Where should I even
start?
Thanks!
Chuck
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