@Override
protected void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
try {
handle(request, response, Function.REQUEST_METHOD_GET);
} catch (JayjaxException e) {
// only thrown after a listener is notified of issue
} catch (ServletException e) {
throw e;
} catch (IOException e) {
throw e;
} catch (Throwable e) {
throw new ServletException(e);
} finally {
Jayjax.clearInvocation();
}
}
protected void handle(HttpServletRequest request, HttpServletResponse response, int requestMethod)
throws Exception {
String path = request.getPathInfo();
Invocation invocation = Jayjax.newInvocation();
invocation.setRequest(request);
invocation.setResponse(response);
Function function = Jayjax.getFunction(path);
if (function == null) {
Jayjax.notifyMessage(JayjaxMessage.ACTION_DOES_NOT_MAP_TO_FUNCTION, null);
return;
}
invocation.setFunction(function);
if (function.isSecure() && !request.isSecure()) {
Jayjax.notifyMessage(JayjaxMessage.SECURE_FUNCTION_UNSECURE_CONNECTION, null);
}
if ((function.getRequestMethods() & requestMethod) == 0) {
Jayjax.notifyMessage(JayjaxMessage.WRONG_METHOD_FOR_FUNCTION, null);
}
try {
invocation.setParameters(HttpJson.fromRequest(request));
} catch (Throwable e) {
Jayjax.notifyMessage(JayjaxMessage.PARSE_REQUEST_VALUES_ERROR, e);
}
Matcher matcher = function.getAction().matcher(path);
if (!matcher.matches()) {
Jayjax.notifyMessage(JayjaxMessage.ACTION_DOES_NOT_MAP_TO_FUNCTION, null);
}
invocation.setMatcher(matcher);
ArgumentResolver[] resolvers = function.getResolvers();
Object[] arguments = new Object[resolvers.length];
invocation.setArguments(arguments);
try {
for (int i = 0; i < resolvers.length; i++) {
arguments[i] = resolvers[i].getArgument(invocation);
}
} catch (Throwable e) {
Jayjax.notifyMessage(JayjaxMessage.BUILD_FUNCTION_ARGUMENTS_ERROR, e);
}
if (function.getValidator() != null) {
try {
if (!function.getValidator().isValid(invocation)) {
return;
}
} catch (Throwable e) {
Jayjax.notifyMessage(JayjaxMessage.VALIDATION_ERROR, e);
}
}
Object controller = null;
try {
controller = Jayjax.getControllerInstance(function.getController(), request);
} catch (Throwable e) {
Jayjax.notifyMessage(JayjaxMessage.CONTROLLER_INSTANTIATION_ERROR, e);
}
Method method = function.getMethod();
Object result = null;
try {
result = method.invoke(controller, arguments);
} catch (Throwable e) {
Jayjax.notifyMessage(JayjaxMessage.FUNCTION_INVOCATION_ERROR, e);
}
invocation.setResult(result);
if (method.getReturnType() != Void.class) {
response.setContentType(CONTENT_TYPE);
if (result == null) {
try {
response.setContentLength(Json.NULL.length());
response.getOutputStream().print(Json.NULL);
} catch (Throwable e) {
Jayjax.notifyMessage(JayjaxMessage.RESPONSE_WRITING_ERROR, e);
}
} else {
String jsonString = "";
try {
JsonValue json = JsonConverters.convert(result);
jsonString = json.toJson();
} catch (Throwable e) {
Jayjax.notifyMessage(JayjaxMessage.SERIALIZATION_ERROR, e);
}
try {
response.setContentLength(jsonString.length());
response.getOutputStream().print(jsonString);
} catch (Throwable e) {
Jayjax.notifyMessage(JayjaxMessage.RESPONSE_WRITING_ERROR, e);
}
}
}
}
@Override
public void init() throws ServletException {
Jayjax.initialize(getServletContext());
}