Maybe RequestCycle.onBegin/EndRequest is what you are looking for?
Juergen
On 11/7/05, [EMAIL PROTECTED] <[EMAIL PROTECTED]> wrote:
> Hi Igor,
>
> >here is something i threw together that solves the deserialization
> >>andability to use the new operator to create pages.
>
> thanks for your work on this.
>
> Regretfully it's still a solution I wouldn't like to use:
> IMHO dependency injection should not be done by the object which has the
> dependency. Yes, you've hidden the lookup in a base class, but nevertheless I
> still think that this is the wrong way around.
>
> Regarding what Eelco has written:
> > And... for this whole discussion: if you like one approach... go
> > implement it now! Create your own component factory, annotations
> > processor, aop, and please contribute when you've got something nice
> > working. Or let us know when you need specific changes to Wicket to
> > support your needs. We'll most probably honor such requests if they
> > are reasonable as we've done in the past.
>
> This is exactly what I'm talking about. Wicket should provide enough hooks
> for everybody to do *their* preferred approach - nothing more and nothing
> less.
>
> It's just that I'm missing a required hook, but perhaps I've just missed it.
> beforeCallComponent() was a step in the right direction, but I'd prefer to
> hook into such a notification outside of stateful code (i.e. a Page).
>
> If it is the Session, PageMap or RequestCycle, if it's on deserializing or
> before calling a method doesn't matter to me - it just should happen outside
> of the pages.
>
> Sven
>
>
> On 11/7/05, Igor Vaynberg <[EMAIL PROTECTED]> wrote:here is something i threw
> together that solves the deserialization andability to use the new operator
> to create pages. atleast i think itdoes....its really late here and all i
> really know so far is that itcompiles :)
>
> the idea is pretty simple, do the injection in the default constructor,and
> then do it anytime the object is deserialized. you use [EMAIL PROTECTED]
> annotation to denote the dependency. it can either be usedon a field or on a
> setter. If you specify the bean name it will be usedto find the bean, if you
> dont then the field's type or the settersargument type will be used for the
> lookup.
>
> -Igor
>
>
>
> On 11/7/05, Igor Vaynberg <[EMAIL PROTECTED]> wrote:and you have to have the
> pages defined as beans in the application context? with their properties
> specified?
>
> -Igor
>
>
>
>
> On 11/7/05, Igor Vaynberg <[EMAIL PROTECTED]> wrote:but how does the above
> handle deserealization of pages? there is nothing to reinject the
> dependencies.
>
> -Igor
>
>
>
>
> On 11/7/05, [EMAIL PROTECTED] <[EMAIL PROTECTED]> wrote:IMHO pages are
> standing on the borderline between a stateful GUI and the rest of the
> application in form of stateless services.
> DIshould be done by the IoC container, creating the pages can better bedone
> the standard Wicket way (e.g. with PageParameters).
>
> As described before I'm using a custom page factory that cooperates with a
> wrapped page factory and the containing bean factory:
>
> public class SpringInjectingPageFactory implements IPageFactory,
> BeanFactoryAware {
>
> private AutowireCapableBeanFactory beanFactory;
> private IPageFactory pageFactory;
>
> public void setPageFactory(IPageFactory pageFactory) {
> this.pageFactory = pageFactory;
> }
>
> public void setBeanFactory(BeanFactory beanFactory) throws BeansException {
> this.beanFactory = (AutowireCapableBeanFactory)beanFactory;
> }
>
> public Page newPage(Class pageClass) {
> Page page = this.pageFactory.newPage(pageClass);
>
> injectDependencies(page, pageClass.getName());
>
> return page;
> }
>
> public Page newPage(Class pageClass, PageParameters parameters) {
> Page page = this.pageFactory.newPage(pageClass, parameters);
>
> injectDependencies(page, pageClass.getName());
>
> return page;
> }
>
> private void injectDependencies(Page page, String beanName) {
> if (this.beanFactory.containsBean(beanName)) {
> this.beanFactory.applyBeanPropertyValues(page, beanName);
> }
> }
> }
>
> Note that if you don't specify a name or id attribute for beans, they will be
> registered under their classname in Spring.
> AndNO, I don't use autowiring: applyBeanPropertyValues() does not
> autowirealthough it is located in AutowireCapableBeanFactory.
>
> Sven
>
> >you are right, this is not ioc. but are pages/components managed by an ioc
> >container?
> >-Igor
> >
> >
> >On 11/6/05, Alexandru Popescu <[EMAIL PROTECTED]> wrote:
> >>
> >> #: Igor Vaynberg changed the world a bit at a time by saying on 11/6/2005
> >> 7:06 PM :#
> >> > Or how about a simple solution:
> >> >
> >> > public MyApplication extends WebApplication {
> >> > public Object lookup(String name) {
> >> > Object=...do a lookup from somewhere like spring context or app
> >> object...;
> >> > return object;
> >> > }
> >> > }
> >> >
> >> > public MyPage extends Page {
> >> > public transient SomeService service;
> >> >
> >> > public SomeService getService() {
> >> > if (service==null) {
> >> > service=getApplication().lookup(SomeService.class.getName());
> >> > }
> >> > return service;
> >> > }
> >> >
> >> > I know its not quiete as elegant as ioc but it has none of the
> >> performance
> >> > hits an automatic injection would cause if it would be done on
> >> > deserialization of every component. Also its a lazy lookup so you dont
> >> do it
> >> > until its needed, and its only done once per page (until it gets
> >> > deserialized).
> >> >
> >> > -Igor
> >> >
> >>
> >> But this was exactly what I was suggesting to avoid ;-). Lookups and
> >> factories are not ioc/di.
> >>
> >> ./alex
> >> --
> >> .w( the_mindstorm )p.
> >>
> >>
> >>
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