Understood. Just introducing it as a possibility. -----Original Message----- From: James Carman [mailto:jcar...@carmanconsulting.com] Sent: Monday, November 23, 2009 3:40 PM To: users@wicket.apache.org Subject: Re: Can @SpringBeans be optional?
That's not a dependency injection thing. It's a "design pattern" called the "Null Object" pattern. On Mon, Nov 23, 2009 at 12:38 PM, Loritsch, Berin C. <berin.lorit...@gd-ais.com> wrote: > Technically speaking from the Dependency Injection koolaid doctrine, the > best way to solve the problem is to have a "null" implementation of your > service that does nothing. The code you are writing doesn't have to > have complex if/else logic as it's able to assume the service is always > there. The null implementation is wired in for the app that doesn't use > it. > > Alternatively, create your accessor (getRememberMeService()) in the > session that will access the ApplicationContext itself. It will > determine if the bean exists or not and return the appropriate value. > Since it allows for lazy initialization, it also addresses any issues > from the ApplicationContext not being set up in time during unit > testing. > > -----Original Message----- > From: Anthony DePalma [mailto:fatef...@gmail.com] > Sent: Monday, November 23, 2009 6:47 AM > To: users@wicket.apache.org > Subject: Can @SpringBeans be optional? > > Often with spring I give some of my services extra features if they are > configured in the xml for it, but otherwise if they are null they are > simply > ignored. I'm running into an issue with my websession, that one of my > apps > can use the RememberMeService but another cannot. However, I'd like to > have > one abstractwebsession they can share, but unfortunately I'll get an > exception when starting the app without the rememberMeService defined in > the > xml. It wouldn't make sense to define one to satisfy the error. > > The only solution I had so far was to inject it into the application > class, > where i can do so without @springbeans and thus a service can be null, > but > is there any way I can configure springbeans to not throw an error on > startup for optional services? > > --------------------------------------------------------------------- > To unsubscribe, e-mail: users-unsubscr...@wicket.apache.org > For additional commands, e-mail: users-h...@wicket.apache.org > > --------------------------------------------------------------------- To unsubscribe, e-mail: users-unsubscr...@wicket.apache.org For additional commands, e-mail: users-h...@wicket.apache.org --------------------------------------------------------------------- To unsubscribe, e-mail: users-unsubscr...@wicket.apache.org For additional commands, e-mail: users-h...@wicket.apache.org
