How do I redirect to another page using Wicket? IIRC, some exception has to be thrown in the constructor, but I don’t remember which one. Thanks in advance.
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How do I redirect to another page using Wicket? IIRC, some exception has to be thrown in the constructor, but I don’t remember which one. Thanks in advance.
Throwing a
RestartResponseAtInterceptPageExceptionwill do it, as you noted in your own answer, but that’s really part of a system for allowing a redirect with an eventual continuation at the current page (frequently part of an authorization process). If that’s not your situation, but you still have to do something that interrupts processing, it might be better to throw aRestartResponseException.The principal usage that I know of for
RestartResponseAtInterceptPageExceptionis in the “redirect to login page” process. If you’re using role-based authentication, an implementation ofIAuthorizationStrategyon determining that you’re not logged in will signal a configuredIUnauthorizedComponentInstantiationListener, typically theAuthenticatedWebApplicationwhich throws this exception if you’re not logged in, with a redirect to a configured login page. (If you’re logged in but unauthorized, something else happens…).The actual redirect is done by the
PageMap, which also in this case remembers the page you were trying to go to. After a successful login, the login page can ask to send you to the page you were trying for originally by callingcontinueToOriginalDestination(), which is a method inComponentand retrieves the remembered page from thePageMap.There’s some good example code for this authentication process, but the exception and intercept are hiding behind the scenes somewhat.