[T5] Error obtaining ApplicationState object

[Neo Anderson <ja...@yahoo.co.uk>]

Hi

I encounter a problem. My problem is when I use @ApplicationState (e.g. @ApplicationState private IAccount account;) to obtain a mock object, which contains user/ account information, the system will complains NullPointerException.

My purpose is to create LoginForm;  so when user enters id/password, the system will verify it. The login Form looks like: 

Login.tml
<t:form t:id="login">
...
<input type="text" t:id="account" t:type="TextField" t:value="account"/>
...
<input type="text" t:id="password" t:type="PasswordField" t:value="password"/>
...
</t:form>

The Login.java will obtain id/ password and use a service to authenticate whether the id/ password exists in the datasource (a mock object). 

public class Login {
...
	private static LoginService security = new LoginService();
...
	@ApplicationState
	private User user;
...
	Object onSubmitFromLogin(){
		user = security.authenticate(getAccount(), getPassword());	
		return index;
	}
}

In LoginService.java, it contains mock object, which has registered using AppModule services. 

public class LoginService{

	@ApplicationState
	private IAccount account;

	public User authenticate(String email, String password){
		User u = account.findUserByAccount(email); // the error occurs at here because account is always NULL!
		if(password!=null && password.equals(u.getPassword())){
			return u;
		}
		return null;
	}
}

AppMoudle.java registers IAccount as a service. Indeed, another registered object ICatalogue works without a problem; and after app is launched, there is no error saying any failure related to IAccount service. 
...
	public void contributeApplicationStateManager(MappedConfiguration<Class, ApplicationStateContribution> configuration){
		ApplicationStateCreator<ICatalogue> catalogue = 
			new ApplicationStateCreator<ICatalogue>(){
				public ICatalogue create() {
					return new Catalogue();
 				}
			};
		ApplicationStateCreator<IAccount> account = 
			new ApplicationStateCreator<IAccount>(){
				public IAccount create() {
					return new Account();
 				}
			};
		configuration.add(ICatalogue.class, new ApplicationStateContribution("session", catalogue));
		configuration.add(IAccount.class, new ApplicationStateContribution("session", account));
	}
...

Is is because the IAccount does not include in the Page folder? Or what might cause such problem?

Thank you very much,

/arsene


      

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Re: [T5] Error obtaining ApplicationState object

["Thiago H. de Paula Figueiredo" <th...@gmail.com>]

Em Fri, 22 May 2009 13:14:24 -0300, Neo Anderson  
<ja...@yahoo.co.uk> escreveu:

> Hi

Hi!

> public class LoginService{
>
> 	@ApplicationState
> 	private IAccount account;

You can't use @ApplicationState (deprecated because of misleading name,  
now use @SessionState instead, works exactly the same) in services, just  
in pages, components and mixins. Use the ApplicationStateManager service  
instead.

-- 
Thiago H. de Paula Figueiredo
Independent Java consultant, developer, and instructor
http://www.arsmachina.com.br/thiago

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