[cdi-dev] Antw.: @PostConstruct and @Inject methods in superclasses

[Mark Struberg]

Yes, imo the things which are not yet clear are the order between @Inject and @PostConstruct, and wha happens if we have a class hierarchy.

LieGrue,
strub

--- On Fri, 9/30/11, Arne Limburg <arne.limburg at openknowledge.de> wrote:

From: Arne Limburg <arne.limburg at openknowledge.de>
Subject: Antw.: [cdi-dev] @PostConstruct and @Inject methods in superclasses
To: "stuart.w.douglas at gmail.com" <stuart.w.douglas at gmail.com>, "struberg at yahoo.de" <struberg at yahoo.de>
Cc: "cdi-dev at lists.jboss.org" <cdi-dev at lists.jboss.org>
Date: Friday, September 30, 2011, 10:18 PM


 
 



 Hi,
for @Inject there is an order specified in JSR 330. Imho we should specify that same order for @Postconstruct if we have specification for it yet.

Regards,
Arne

----- Reply message -----
Von: "Stuart Douglas" <stuart.w.douglas at gmail.com>
Datum: Fr., Sep. 30, 2011 23:58
Betreff: [cdi-dev] @PostConstruct and @Inject methods in superclasses
An: "Mark Struberg" <struberg at yahoo.de>
Cc: "cdi-dev" <cdi-dev at lists.jboss.org>

 


This is actually covered by the interceptors specification, from memory I am pretty sure the base class method is mean't to be called first, but the spec gives you the full order. 



@Inject methods are called before @PostConstuct (the are called in InjectionTarget.inject, which gets called before InjectionTarget.postConstruct).



I don't think we specify an order for @Inject methods.



Stuart



On 01/10/2011, at 5:47 AM, Mark Struberg wrote:



> Hi!

> 

> JSR-250 common annotations is pretty thin about having @PostConstruct in multiple class hierarchies. It just says that there must only be one single method annotated with @PostConstruct in a class. Thus my question:

> 

> If I have 

> 

> 

> public class Animal {

>  @PostConstruct

> 

>  public void doInit() {..}

>  ..

> 

> }

> 

> and 

> 

>  public class Horse extends Animal {

>  @PostConstruct

> 

>  public void doSomeOtherInit() {..}

>  ..

> 

> }

> 

> 

> 1.) for a contextual instance of Horse, will Animal#doInit() get executed or only the one from the 'effective' class?

> 2.) if 1.) was yes, then In which order do they get executed? Is this specced somewhere?

> 

> 3.) Same scenario with @Inject methods. Do we specify an order?

> 

> 4.) Both classes have @Inject methods and @PostConstruct. Again: which order of invocaition?

> 

> 

> Just that you understand my intention: we had a @PostConstruct method in Horse which did set a 'cached' flag in Animal. Turned out that this was a random generator depending on the intsalled server ;)

> 

> 

> LieGrue,

> strub

> 

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> cdi-dev mailing list

> cdi-dev at lists.jboss.org

> https://lists.jboss.org/mailman/listinfo/cdi-dev





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