In the previous post on Spring Web Flow 2.0, I mentioned that I was getting a 'Could not complete request' error as an IllegalStateException at the end of the flow. I found the issue. It was because the URL in the flow handler wasn't a context relative one. I was returning 'person/search', but that was just being added to the end of the current URL. The correct value to return is 'contextRelative:/person/search.html' (the servlet-mapping for the DispatcherServlet is '*.html'). With this working, I was able to remove the view attribute from the end-state elements in the flow. See the Simple Spring Web Flow Webapp example for more information.
@Component
public class PersonFlowHandler extends AbstractFlowHandler {
/**
* Where the flow should go when it ends.
*/
@Override
public String handleExecutionOutcome(FlowExecutionOutcome outcome,
HttpServletRequest request,
HttpServletResponse response) {
return getContextRelativeUrl(PersonController.SEARCH_VIEW_KEY);
}
/**
* Where to redirect if there is an exception not handled by the flow.
*/
@Override
public String handleException(FlowException e,
HttpServletRequest request,
HttpServletResponse response) {
if (e instanceof NoSuchFlowExecutionException) {
return getContextRelativeUrl(PersonController.SEARCH_VIEW_KEY);
} else {
throw e;
}
}
/**
* Gets context relative url with an '.html' extension.
*/
private String getContextRelativeUrl(String view) {
return "contextRelative:" + view + ".html";
}
}
Thursday, June 19, 2008
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