[cdi-dev] calling 'equals' on a proxy?

[Adam Bien]

There is a very good chapter about @Stateful and EJB:

Stateful Session Beans
A stateful session object has a unique identity that is assigned by the container at the time the object is created. A client of the stateful session bean business interface can determine if two business interface or no-interface view references refer to the same session object by use of the equals method.
For example,
@EJB Cart cart1; @EJB Cart cart2; ... if (cart1.equals(cart1)) { // this test must return true
...
} ... if (cart1.equals(cart2)) { // this test must return false
}
...
All stateful session bean references to the same business interface for the same stateful session bean instance will be equal. All references to the no-interface view of the same stateful session bean instance will be equal. Stateful session bean references to different interface types or between an interface type and a no-interface view or to different session bean instances will not have the same identity.

Page 53,

thanks,

adam
On 17.03.2011, at 01:13, Mark Struberg wrote:

> Stateless session beans are always special (because they *tataaa* contain no state). Since CDI beans almost always contain some state info, the 'else' part of the paragraph -> return false; will always be taken.
> 
> But always returning false for all CDI beans also doesn't sound quite right to me... 
> 
> There is no special paragraph about equals on Stateful session beans or EMPs in the EJB spec, isn't?
> 
> 
> LieGrue,
> strub
> 
> --- On Wed, 3/16/11, Adam Bien <abien at adam-bien.com> wrote:
> 
> From: Adam Bien <abien at adam-bien.com>
> Subject: Re: [cdi-dev] calling 'equals' on a proxy?
> To: "Peter Muir" <pmuir at redhat.com>
> Cc: "Mark Struberg" <struberg at yahoo.de>
> Date: Wednesday, March 16, 2011, 11:51 PM
> 
> @Mark -> please file the issue.
> On 17.03.2011, at 00:02, Peter Muir wrote:
> Adam or mark, can you file a CDI issue to track this?
> 
> --Pete Muirhttp://in.relation.to/Bloggers/Pete
> On 16 Mar 2011, at 19:06, Adam Bien <abien at adam-bien.com> wrote:
> 
> Equals behavior is similarly specificied in the EJB 3.1 spec. Probably we could borrow something:
> "The equals method always returns true when used to compare references to the same business inter- face type of the same stateless session bean. The equals method always returns true when used to com- pare references to the no-interface view of the same stateless session bean. Stateless session bean references to either different business interface types or between an interface type and a no-interface view or to different session beans will not be equal." EJB 3.1, Page 54
> greetings!,
> adam
> On 14.03.2011, at 12:52, Pete Muir wrote:
> Stuart, you had this one worked out right? I believe the spec says the behaviour is unspecified.
> 
> On 7 Mar 2011, at 15:52, Mark Struberg wrote:
> 
> Hi Pete, others!
> 
> Do you remember our discussion about what should happen if equals() gets called on a proxy?
> 
> Should it route to the equals method of the currently proxied instance?
> 
> LieGrue,
> strub
> 
> 
> 
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> 
> Consultant, Author, Speaker, Java Champion  Weblog: blog.adam-bien.com press: press.adam-bien.com eMail:  abien at adam-bien.com twitter: twitter.com/adambien Mobile: 0049(0)170 280 3144
>  Author: 7 (Java SE/EE, SOA) Books, about 100 articles 
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> Consultant, Author, Speaker, Java Champion  Weblog: blog.adam-bien.com press: press.adam-bien.com eMail:  abien at adam-bien.com twitter: twitter.com/adambien Mobile: 0049(0)170 280 3144
>  Author: 7 (Java SE/EE, SOA) Books, about 100 articles 
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Consultant, Author, Speaker, Java Champion
 
 Weblog: blog.adam-bien.com
 press: press.adam-bien.com
 eMail:  abien at adam-bien.com
 twitter: twitter.com/adambien
 Mobile: 0049(0)170 280 3144

 Author: 7 (Java SE/EE, SOA) Books, about 100 articles 








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