/**
* Processes the actual dispatching to the handler for resource requests.
* <p>The handler will be obtained by applying the portlet's HandlerMappings in order.
* The HandlerAdapter will be obtained by querying the portlet's installed
* HandlerAdapters to find the first that supports the handler class.
* @param request current portlet render request
* @param response current portlet render response
* @throws Exception in case of any kind of processing failure
*/
@Override
protected void doResourceService(ResourceRequest request, ResourceResponse response) throws Exception {
if (logger.isDebugEnabled()) {
logger.debug("DispatcherPortlet with name '" + getPortletName() + "' received resource request");
}
HandlerExecutionChain mappedHandler = null;
int interceptorIndex = -1;
try {
ModelAndView mv;
try {
// Determine handler for the current request.
mappedHandler = getHandler(request);
if (mappedHandler == null || mappedHandler.getHandler() == null) {
noHandlerFound(request, response);
return;
}
// Apply preHandle methods of registered interceptors.
HandlerInterceptor[] interceptors = mappedHandler.getInterceptors();
if (interceptors != null) {
for (int i = 0; i < interceptors.length; i++) {
HandlerInterceptor interceptor = interceptors[i];
if (!interceptor.preHandleResource(request, response, mappedHandler.getHandler())) {
triggerAfterResourceCompletion(mappedHandler, interceptorIndex, request, response, null);
return;
}
interceptorIndex = i;
}
}
// Actually invoke the handler.
HandlerAdapter ha = getHandlerAdapter(mappedHandler.getHandler());
mv = ha.handleResource(request, response, mappedHandler.getHandler());
// Apply postHandle methods of registered interceptors.
if (interceptors != null) {
for (int i = interceptors.length - 1; i >= 0; i--) {
HandlerInterceptor interceptor = interceptors[i];
interceptor.postHandleResource(request, response, mappedHandler.getHandler(), mv);
}
}
}
catch (ModelAndViewDefiningException ex) {
logger.debug("ModelAndViewDefiningException encountered", ex);
mv = ex.getModelAndView();
}
catch (Exception ex) {
Object handler = (mappedHandler != null ? mappedHandler.getHandler() : null);
mv = processHandlerException(request, response, handler, ex);
}
// Did the handler return a view to render?
if (mv != null && !mv.isEmpty()) {
render(mv, request, response);
}
else {
if (logger.isDebugEnabled()) {
logger.debug("Null ModelAndView returned to DispatcherPortlet with name '" +
getPortletName() + "': assuming HandlerAdapter completed request handling");
}
}
// Trigger after-completion for successful outcome.
triggerAfterResourceCompletion(mappedHandler, interceptorIndex, request, response, null);
}
catch (Exception ex) {
// Trigger after-completion for thrown exception.
triggerAfterResourceCompletion(mappedHandler, interceptorIndex, request, response, ex);
throw ex;
}
catch (Error err) {
PortletException ex =
new PortletException("Error occured during request processing: " + err.getMessage(), err);
// Trigger after-completion for thrown exception.
triggerAfterResourceCompletion(mappedHandler, interceptorIndex, request, response, ex);
throw ex;
}
}
