public ModelAndView excuteAction(HttpServletRequest request, HttpServletResponse response)
throws Exception {
// 这里需要声明request的实际类型，否则会报错
request.setAttribute(HandlerMapping.INTROSPECT_TYPE_LEVEL_MAPPING, true);
HandlerExecutionChain chain = handlerMapping.getHandler(request);
ModelAndView model = null;
try {
model = handlerAdapter.handle(request, response, chain.getHandler());
} catch (Exception e) {
e.printStackTrace();
}
return model;
}
/**
* This method finds the handler for a given request URI, or throws an exception if none were
* found.
*
* <p>It will also ensure that the URI Parameters i.e. /context/test/{name} are added to the
* request
*
* @param request the request for which to find a handler
* @return The handler that agreed to handle the specified request.
* @throws NoSuchMethodException if no acceptable handlers could be found
*/
protected Object getHandler(final MockHttpServletRequest request) throws NoSuchMethodException {
HandlerExecutionChain chain = null; // NOPMD by jon.adams on 5/14/12
final Map<String, HandlerMapping> map = applicationContext.getBeansOfType(HandlerMapping.class);
final Iterator<HandlerMapping> itt = map.values().iterator();
while (itt.hasNext()) {
final HandlerMapping mapping = itt.next();
try {
chain = mapping.getHandler(request);
} catch (final HttpRequestMethodNotSupportedException exc) {
// ignore and try next
LOGGER.info(
mapping.getClass().getName()
+ " handler determined it will not handle the request. Message: "
+ exc.getMessage(),
exc);
} catch (final Exception exc) {
throw new RuntimeException(exc); // NOPMD
}
if (chain == null) {
// ignore and try next
LOGGER.debug(
mapping.getClass().getName() + " handler determined it will not handle the request.");
} else {
// found one. quit looking for more.
break;
}
}
if (chain == null) {
throw new NoSuchMethodException(
"Unable to find handler for request URI: " + request.getRequestURI());
}
return chain.getHandler();
}
@Override
protected Object getHandlerInternal(HttpServletRequest request) throws Exception {
Object temp = request.getAttribute(DaspConstants.REQ_ATTR_REQUEST_PARSER);
if (!(temp instanceof IRequestParser)) {
LOGGER.warn("No instance of [" + IRequestParser.class + "] found!");
return null;
}
IRequestParser rp = (IRequestParser) temp;
String moduleName = rp.getRequestModule();
if (StringUtils.isBlank(moduleName)) {
moduleName = "home";
}
IOsgiBootstrap osgiBootstrap = DaspGlobal.getOsgiBootstrap();
if (osgiBootstrap == null) {
String msg = "Instance of [" + IOsgiBootstrap.class + " not found]!";
LOGGER.warn(msg);
return null;
}
Map<String, String> filter = new HashMap<String, String>();
filter.put("Module", moduleName);
HandlerMapping handlerMapping = osgiBootstrap.getService(SERVICE_CLASS, filter);
if (handlerMapping == null) {
String msg = "No handler mapping found for module [" + moduleName + "]!";
LOGGER.warn(msg);
return null;
}
Object result = handlerMapping.getHandler(request);
if (LOGGER.isDebugEnabled()) {
String msg = "Found [" + result + "] for module [" + moduleName + "].";
LOGGER.debug(msg);
}
return result;
}