Hello,
I have a custom error page BaseErrorPage:
public class BaseErrorPage extends WebPage {
private final static long serialVersionUID = 1L;
public BaseErrorPage() {
super();
}
protected void configureResponse() {
String acceptHeader = getWebRequestCycle().getWebRequest().
getHttpServletRequest().getHeader("Accept");
String contentType = ";charset=UTF-8";
if (acceptHeader.contains("application/xhtml+xml")) {
contentType = "application/xhtml+xml" + contentType;
} else {
contentType = "text/html" + contentType;
}
getResponse().setContentType(contentType);
}
}
It's configured to be displayed in case of a runtime exception:
MyApplication.init():
...
getApplicationSettings().setInternalErrorPage(BaseErrorPage.class);
getExceptionSettings().setUnexpectedExceptionDisplay(IExceptionSettings.SHOW_INTERNAL_ERROR_PAGE);
...
I'm testing what happens if MySQL server goes down.
When it happens, first I got a SocketException which is caught and
BaseErrorPage is displayed.
But if I wait for a while (perhaps, until session expires?), I get just a
blank page in browser and in server log I see the following:
unexpected exception when handling another exception: Can't instantiate page
using constructor public com.mycorp.myapp.web.page.BaseErrorPage()
org.apache.wicket.WicketRuntimeException: Can't instantiate page using
constructor public com.mycorp.myapp.web.page.BaseErrorPage()
at
org.apache.wicket.session.DefaultPageFactory.newPage(DefaultPageFactory.java:168)
at
org.apache.wicket.session.DefaultPageFactory.newPage(DefaultPageFactory.java:58)
at
org.apache.wicket.request.target.component.BookmarkablePageRequestTarget.newPage(BookmarkablePageRequestTarget.java:262)
at
org.apache.wicket.request.target.component.BookmarkablePageRequestTarget.getPage(BookmarkablePageRequestTarget.java:283)
at
org.apache.wicket.request.target.component.BookmarkablePageRequestTarget.respond(BookmarkablePageRequestTarget.java:231)
at
org.apache.wicket.request.AbstractRequestCycleProcessor.respond(AbstractRequestCycleProcessor.java:104)
at org.apache.wicket.RequestCycle.respond(RequestCycle.java:1181)
...
Why does this happen and how can I prevent this?
I checked the DefaultPageFactory source and found that there's either an
Abort-, Initialization- or MarkupException, but I'm not sure how to deal
with any of those.
--
sp
