On a side note:
Don't forget to overwrite isErrorPage() to return true.
Maurice
On Thu, May 15, 2008 at 3:46 PM, Johan Compagner <[EMAIL PROTECTED]> wrote:
> why should wicket handle exceptions like that, what kind? what should wicket
> do then?
>
> you should just be sure that you always can create an error page, we cant
> help if that bombs out.
>
> johan
>
>
> On Thu, May 15, 2008 at 3:18 PM, Sergey Podatelev <
> [EMAIL PROTECTED]> wrote:
>
>> Yes, as I said in the previous message, I use SpringWebApplicationFactory.
>> The problem, apparently, is that Spring wants to have a working database
>> connection even when Wicket renders pages that doesn't access database in
>> any way.
>>
>> Can Wicket handle a runtime exception like this?
>>
>>
>> On Thu, May 15, 2008 at 3:46 PM, Johan Compagner <[EMAIL PROTECTED]>
>> wrote:
>>
>> > ok somehow spring does something
>> > Caused by:
>> > org.springframework.transaction.CannotCreateTransactionException:
>> > Could not open JDBC Connection for transaction; nested exception is
>> > com.mysql.jdbc.exceptions.jdbc4.CommunicationsException: Communications
>> > link
>> >
>> > So are you using some spring thing there?
>> >
>> >
>> > On Thu, May 15, 2008 at 1:22 PM, Sergey Podatelev <
>> > [EMAIL PROTECTED]> wrote:
>> >
>> > > The default stacktrace is listed below.
>> > >
>> > > Apparently, the error page won't load for the same reason original page
>> > > wasn't loaded: Spring (which I also use) wants a Connection even for a
>> > page
>> > > that does not require any database interaction. This question is also
>> > > bothering me, and although this is a Spring issue, perhaps someone of
>> > > Wicket
>> > > people could answer me since there so much examples of integration of
>> > > Wicket
>> > > and Spring.
>> > >
>> > > unexpected exception when handling another exception: Can't instantiate
>> > > page
>> > > using constructor public ru.vrgraphics.lianet.web.page.BaseErrorPage()
>> > > org.apache.wicket.WicketRuntimeException: Can't instantiate page using
>> > > constructor public ru.vrgraphics.lianet.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)
>> > > at org.apache.wicket.RequestCycle.step(RequestCycle.java:1248)
>> > > at org.apache.wicket.RequestCycle.steps(RequestCycle.java:1330)
>> > > at org.apache.wicket.RequestCycle.request(RequestCycle.java:493)
>> > > at
>> > >
>> org.apache.wicket.protocol.http.WicketFilter.doGet(WicketFilter.java:358)
>> > > at
>> > >
>> > >
>> >
>> org.apache.wicket.protocol.http.WicketFilter.doFilter(WicketFilter.java:194)
>> > > at
>> > >
>> > >
>> >
>> org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
>> > > at
>> > >
>> > >
>> >
>> org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
>> > > at
>> > >
>> > >
>> >
>> org.acegisecurity.util.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:265)
>> > > at
>> > >
>> > >
>> >
>> org.acegisecurity.context.HttpSessionContextIntegrationFilter.doFilter(HttpSessionContextIntegrationFilter.java:249)
>> > > at
>> > >
>> > >
>> >
>> org.acegisecurity.util.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:275)
>> > > at
>> > >
>> >
>> org.acegisecurity.util.FilterChainProxy.doFilter(FilterChainProxy.java:149)
>> > > at
>> > >
>> > >
>> >
>> org.acegisecurity.util.FilterToBeanProxy.doFilter(FilterToBeanProxy.java:98)
>> > > at
>> > >
>> > >
>> >
>> org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
>> > > at
>> > >
>> > >
>> >
>> org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
>> > > at
>> > >
>> > >
>> >
>> org.netbeans.modules.web.monitor.server.MonitorFilter.doFilter(MonitorFilter.java:390)
>> > > at
>> > >
>> > >
>> >
>> org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
>> > > at
>> > >
>> > >
>> >
>> org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
>> > > at
>> > >
>> > >
>> >
>> org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233)
>> > > at
>> > >
>> > >
>> >
>> org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:175)
>> > > at
>> > >
>> > >
>> >
>> org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:128)
>> > > at
>> > >
>> > >
>> >
>> org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
>> > > at
>> > >
>> > >
>> >
>> org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
>> > > at
>> > >
>> >
>> org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:286)
>> > > at
>> > >
>> >
>> org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:844)
>> > > at
>> > >
>> > >
>> >
>> org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:583)
>> > > at
>> > > org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:447)
>> > > at java.lang.Thread.run(Thread.java:619)
>> > > Caused by: java.lang.reflect.InvocationTargetException
>> > > at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native
>> > > Method)
>> > > at
>> > >
>> > >
>> >
>> sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:39)
>> > > at
>> > >
>> > >
>> >
>> sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:27)
>> > > at
>> java.lang.reflect.Constructor.newInstance(Constructor.java:513)
>> > > at
>> > >
>> > >
>> >
>> org.apache.wicket.session.DefaultPageFactory.newPage(DefaultPageFactory.java:149)
>> > > ... 33 more
>> > > Caused by:
>> > > org.springframework.transaction.CannotCreateTransactionException:
>> > > Could not open JDBC Connection for transaction; nested exception is
>> > > com.mysql.jdbc.exceptions.jdbc4.CommunicationsException: Communications
>> > > link
>> > > failure
>> > >
>> > > On Thu, May 15, 2008 at 1:25 PM, Johan Compagner <[EMAIL PROTECTED]
>> >
>> > > wrote:
>> > >
>> > > > do you have more stacktrace like Cause : xxxxx
>> > > >
>> > > > On Thu, May 15, 2008 at 11:22 AM, Sergey Podatelev <
>> > > > [EMAIL PROTECTED]> wrote:
>> > > >
>> > > > > 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
>> > > > >
>> > > >
>> > >
>> > >
>> > >
>> > > --
>> > > sp
>> > >
>> >
>>
>>
>>
>> --
>> sp
>>
>
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