/**
* Trigger afterCompletion callbacks on the mapped HandlerInterceptors. Will just invoke
* afterCompletion for all interceptors whose preHandle invocation has successfully completed and
* returned true.
*
* @param mappedHandler the mapped HandlerExecutionChain
* @param interceptorIndex index of last interceptor that successfully completed
* @param ex Exception thrown on handler execution, or <code>null</code> if none
* @see HandlerInterceptor#afterCompletion
*/
protected void triggerAfterCompletion(
HandlerExecutionChain mappedHandler,
int interceptorIndex,
HttpServletRequest request,
HttpServletResponse response,
Exception ex)
throws Exception {
// Apply afterCompletion methods of registered interceptors.
if (mappedHandler != null) {
if (mappedHandler.getInterceptors() != null) {
for (int i = interceptorIndex; i >= 0; i--) {
HandlerInterceptor interceptor = mappedHandler.getInterceptors()[i];
try {
interceptor.afterCompletion(request, response, mappedHandler.getHandler(), ex);
} catch (Throwable ex2) {
GrailsUtil.deepSanitize(ex2);
logger.error("HandlerInterceptor.afterCompletion threw exception", ex2);
}
}
}
}
}
/* (non-Javadoc)
* @see org.springframework.web.servlet.DispatcherServlet#doDispatch(javax.servlet.http.HttpServletRequest, javax.servlet.http.HttpServletResponse)
*/
protected void doDispatch(final HttpServletRequest request, HttpServletResponse response)
throws Exception {
HttpServletRequest processedRequest = request;
HandlerExecutionChain mappedHandler = null;
int interceptorIndex = -1;
final LocaleResolver localeResolver =
(LocaleResolver) request.getAttribute(LOCALE_RESOLVER_ATTRIBUTE);
// Expose current LocaleResolver and request as LocaleContext.
LocaleContext previousLocaleContext = LocaleContextHolder.getLocaleContext();
LocaleContextHolder.setLocaleContext(
new LocaleContext() {
public Locale getLocale() {
return localeResolver.resolveLocale(request);
}
});
// If the request is an include we need to try to use the original wrapped sitemesh
// response, otherwise layouts won't work properly
if (WebUtils.isIncludeRequest(request)) {
response = useWrappedOrOriginalResponse(response);
}
GrailsWebRequest requestAttributes = null;
GrailsWebRequest previousRequestAttributes = null;
Exception handlerException = null;
try {
ModelAndView mv = null;
try {
Object exceptionAttribute = request.getAttribute(EXCEPTION_ATTRIBUTE);
// only process multipart requests if an exception hasn't occured
if (exceptionAttribute == null) processedRequest = checkMultipart(request);
// Expose current RequestAttributes to current thread.
previousRequestAttributes =
(GrailsWebRequest) RequestContextHolder.currentRequestAttributes();
requestAttributes = new GrailsWebRequest(processedRequest, response, getServletContext());
copyParamsFromPreviousRequest(previousRequestAttributes, requestAttributes);
// Update the current web request.
WebUtils.storeGrailsWebRequest(requestAttributes);
if (logger.isDebugEnabled()) {
logger.debug("Bound request context to thread: " + request);
logger.debug("Using response object: " + response.getClass());
}
// Determine handler for the current request.
mappedHandler = getHandler(processedRequest, false);
if (mappedHandler == null || mappedHandler.getHandler() == null) {
noHandlerFound(processedRequest, response);
return;
}
// Apply preHandle methods of registered interceptors.
if (mappedHandler.getInterceptors() != null) {
for (int i = 0; i < mappedHandler.getInterceptors().length; i++) {
HandlerInterceptor interceptor = mappedHandler.getInterceptors()[i];
if (!interceptor.preHandle(processedRequest, response, mappedHandler.getHandler())) {
triggerAfterCompletion(
mappedHandler, interceptorIndex, processedRequest, response, null);
return;
}
interceptorIndex = i;
}
}
// Actually invoke the handler.
HandlerAdapter ha = getHandlerAdapter(mappedHandler.getHandler());
mv = ha.handle(processedRequest, response, mappedHandler.getHandler());
// Apply postHandle methods of registered interceptors.
if (mappedHandler.getInterceptors() != null) {
for (int i = mappedHandler.getInterceptors().length - 1; i >= 0; i--) {
HandlerInterceptor interceptor = mappedHandler.getInterceptors()[i];
interceptor.postHandle(processedRequest, response, mappedHandler.getHandler(), mv);
}
}
} catch (ModelAndViewDefiningException ex) {
GrailsUtil.deepSanitize(ex);
handlerException = ex;
if (logger.isDebugEnabled()) logger.debug("ModelAndViewDefiningException encountered", ex);
mv = ex.getModelAndView();
} catch (Exception ex) {
GrailsUtil.deepSanitize(ex);
handlerException = 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.wasCleared()) {
// If an exception occurs in here, like a bad closing tag,
// we have nothing to render.
try {
render(mv, processedRequest, response);
} catch (Exception e) {
mv = super.processHandlerException(processedRequest, response, mappedHandler, e);
handlerException = e;
render(mv, processedRequest, response);
}
} else {
if (logger.isDebugEnabled()) {
logger.debug(
"Null ModelAndView returned to DispatcherServlet with name '"
+ getServletName()
+ "': assuming HandlerAdapter completed request handling");
}
}
// Trigger after-completion for successful outcome.
triggerAfterCompletion(
mappedHandler, interceptorIndex, processedRequest, response, handlerException);
} catch (Exception ex) {
// Trigger after-completion for thrown exception.
triggerAfterCompletion(mappedHandler, interceptorIndex, processedRequest, response, ex);
throw ex;
} catch (Error err) {
ServletException ex = new NestedServletException("Handler processing failed", err);
// Trigger after-completion for thrown exception.
triggerAfterCompletion(mappedHandler, interceptorIndex, processedRequest, response, ex);
throw ex;
} finally {
// Clean up any resources used by a multipart request.
if (processedRequest instanceof MultipartHttpServletRequest && processedRequest != request) {
if (multipartResolver != null)
this.multipartResolver.cleanupMultipart((MultipartHttpServletRequest) processedRequest);
}
request.removeAttribute(MultipartHttpServletRequest.class.getName());
// Reset thread-bound holders
if (requestAttributes != null) {
requestAttributes.requestCompleted();
WebUtils.storeGrailsWebRequest(previousRequestAttributes);
}
LocaleContextHolder.setLocaleContext(previousLocaleContext);
if (logger.isDebugEnabled()) {
logger.debug("Cleared thread-bound request context: " + request);
}
}
}