The real question: Is there a way to clear certain attributes for all components on an initial page load?
Background info:
In my application, I have a JSF 2.0 frontend layer that speaks to a service layer (the service layer is made up of Spring beans that get injected to the managed beans).
The service layer does its own validation, and I do the same validation in the frontend layer using my own validator classes to try and avoid code duplication somehow. These validator classes aren't JSF validators, they're just POJOs.
I'm only doing validation on an action, so in the action method, I perform validation, and only if it's valid do I call through to the service layer.
When I do my validation, I set the styleClass and title on the UIComponents using reflection (so if the UIComponent has the setStyleClass(:String) or setTitle(:String) methods, then I use them).
This works nicely, and on a validation error I see a nicely styled text box with a popup containing the error message if I hover over it. However, since the component is bound to a Session Scoped Managed Bean, it seems that these attributes stick. So if I navigate away and come back to the same page, the styleClass and title are still in the error state.
Is there a way to clear the styleClass and title attributes on each initial page load?
Thanks,
James
P.S. I'm using the action method to validate because of some issues I had before with JSF 1.2 and it's validation methods, but can't remember why... so that's why I'm using the action method to validate.
Ok, so I must use a PhaseListener, see this blog entry by BalusC and this other blog entry, that's a much better way of doing what I'm doing already - setting the styleClass manually using reflection - which gets all components with messages and highlights them... I'm gonna do the same, however think it's possible to add an attribute instead, haven't tried it yet.
Related
I am using Struts 2 v 2.3.16.3 with tomcat 6.
A user will click on an action which finds an object by id and the page displays it. I have encountered a sporadic bug where the user will all of a sudden get the id of another lookup from another user on another machine. So effectively they are both calling the same action but passing different id to the request, but both end up viewing the same id.
This is obviously disastrous, and the data is totally corrupted as both users think they are editing a different record. Any ideas how make sure session/request activity is kept secure to each session?
I am also using spring and am using the #Transactional annotation in my Service layer, which returns the objects from the DAO. Is there something I need to do with this annotation to make it secure for each session ?
I am using org.springframework.orm.hibernate3.HibernateTransactionManager
Classic Thread-UnSafe problem.
Since you nominated Spring, my first guess is that you have not specified the right scope for your action beans in Spring xml configuration.
Be sure you are using scope="prototype" because otherwise the default scope of Spring is Singleton, and you don't want a single(ton) instance of an Action, that would not be ThreadLocal (and hence ThreadSafe) anymore.
If it is not that, it could be something on an Interceptor (that, differently from an action, is not Thread Safe), or you are using something static (in your Business / DAO layer, or in the Action itself) that should be not.
I have a quick question about how to use the Spring MVC.
I just started with it and i was used to have pages that always had their data loaded calling some controller that you setted ON THE PAGE.. calling some methods on controllers to load objects at the page at load time.
Is it the same in Spring MVC? Cuz what im seeing so far is that if you want to load a page with data, you always have to use a modelandview object which is loaded by a method that you must call before... and them you return the modelandview object with its destination to the view that you want.
What im trying to know is if there is a way that the page requests some data from the controller before it gets loaded... automatically...
Dont know if im making my self clear... thanks anyway for the help!
in spring mvc, using Controllers, it is always Request->Controller(populates model and chooses view)->Response.
you could use ajax to load data from any resource (even Controllers) or jsp:useBean to explicitly call some business logic or jsp:include to include a certain fragment or a custom jsp tag.
I also face the same situation.
check the below link for getting the data from the controller before view(JSP) load.
how to load the data into index page
I have a view model that implements IValidatableObject and also has several validation attributes. When I attempt to call an action on my ApiController, only the attribute validation is performed. Does ASP.NET Web API not support IValidatableObject? What's the alternative for complex validation that cannot be represented by a single attribute?
Edit: Somewhere along the line, I must have fudged something up. The validation mysteriously started working as expected. Looks like IValidatableObject is definitely supported by default.
With Web API 2.1 (Microsoft.AspNet.WebApi nuget 5.1.x), I experienced IValidatableObject's Validate method not being called if any of the validation attributes are invalid. Hence, all validation attributes that have been applied to your class's properties must first pass as valid before that class's Validate method will be called.
If, for example, you have a property with the RequiredAttribute and you do not put a value in that field, your implementation of IValidatableObject's Validate method will not be called. Although not technically a bug, I expected the Validate method to be called every time I validate.
Not yet tried IValidatableObject on webapi, but it should be supported according to the documentation the Validation provider for DataAnnotations (DataAnnotationsModelValidatorProvider) provide also IValidatableObject validation. See here: http://msdn.microsoft.com/en-us/library/system.web.http.validation.providers(v=vs.108)
Anyway, you can use also Object level ValidationAttribute that you can use to decorated a class...It is not so easy as IValidatableObject, but should work.
As of now, IValidatableObject is supported.
In my web application I am using Spring login form (with Spring-security). By default the login form has the fields j_username and j_password. I need to add one more element(checkbox for Terms&Conditions). The current code doesn't have LoginForm as well as LoginController since Spring is internally handling it.
Can anyone please tell how to handle/override this?
I have seen this link Spring security custom login page
But I need to add the new element in LoginForm (which is not existing currently) - where I need to add this new element(in Form - .java file)
Also should I write a new controller (LoginController) or can I use any existing filter as given here? http://static.springsource.org/spring-security/site/docs/3.1.x/reference/springsecurity-single.html#filter-stack
Does the user just have to check the box in order to procede, or does it bind to a backing model object.
If it's the former, I'd just handle it through javascript. If the latter, the easiest way would probably be implementing an Authentication Filter, this area of the documentation might help:
http://static.springsource.org/spring-security/site/docs/3.0.x/reference/core-web-filters.html#form-login-filter
I primarily use annotated controllers that return ModelAndView object used by Spring and Freemarker to render and return pages to browsers - works great. I'd now like to respond to ajax gets and posts that return html fragments as payload inside an XML message.
The problem I'm having not returning a ModelAndView objects seems to confuse Spring WRT to #ModelAttribute (s) and session objects that support data to / and from forms.
I've had to hack the freemarker template to support i18n messages, etc. I'm finding that simply rendering an FTL file while also trying to utilize Spring's object rendering from froms is becoming quite a rabbit hole.
I'm trying to manually (guess what and) do the things that get done behind the scenes and it's not working optimally. To edit an object I'm manually placing the object in the session on rendering the edit form. When the post comes back there are residual/different values in the object I get back out of the session AND the ModelAttribute that Spring rendered for me.
Bottom line? Questions about Spring, Freemarker and custom non-ModelAndView responses that are rendered by Freemarker.
Add another instance of FreeMarkerViewResolver that only that has viewNames ='*.frg'. The viewClass should be your own class that renders the template the way you want by overriding the processTemplate method.