Imre Kifor wrote:
>
> The spec states that all bean instances must be created using newInstance()
> on the bean's class. This means that there will be only one valid initial
> state per bean class in a running server (and is created through the bean's
> default public constructor).
>
> We keep one such "template" instance around for all deployed bean classes
> and before the server releases an instance back to the pool, we "wipe" the
> instance's state clean with the template using reflection. No serialization
> is required in the process and, since we operate on the Java 2 platform, we
> can reset private members as well.
>
> Imre Kifor
> Valto Systems
>
Consider following incomplete example bean with BMP:
class TestBean
{
List l = new ArrayList()
void ejbCreate()
{
}
void test(String a)
{
l.add(a);
}
}
As far as I understand you, in this example, your algorithm will
make one list from prototype object shared across all instances.
How you will handle this case?
Constantine
> -----Original Message-----
> From: Constantine Plotnikov <[EMAIL PROTECTED]>
> To: [EMAIL PROTECTED] <[EMAIL PROTECTED]>
> Date: Wednesday, March 17, 1999 8:50 AM
> Subject: Re: ejbCreate( ) - initialize instance variables
>
> >Hi!
> >
> >1. Do I understand it correctly? In your server, initial values for all
> > fields are saved for each instance and they are restored right before
> > creation.
> >
> >2. If yes, how do you save values?
> > a) in serialized form
> > b) just pointers to values recived as Field.get()
> > c) other, please clarify what.
> >
> >3. If no, could you please clarify semantics of restoring values
> > in your server.
> >
> >Constantine
> >
> >Imre Kifor wrote:
> >>
> >> We believe that bean instances retrieved from the instance pool should
> >> always be in their initial state (i.e. the state right after
> construction)
> >> regardless of the used persistence management type.
> >>
> >> This means that with Ejipt your 'country' member will be predictably set
> to
> >> "USA" upon entering ejbCreate, ejbFindXXX and ejbActivate. Moreover,
> since
> >> Ejipt resets all instances before returning them to the pool, you will
> also
> >> be assured that your possibly sensitive or very large member data is not
> >> held by pooled instances.
> >>
> >> Imre Kifor
> >> Valto Systems
> >>
> >> -----Original Message-----
> >> From: Sachin Aggarwal <[EMAIL PROTECTED]>
> >> To: [EMAIL PROTECTED] <[EMAIL PROTECTED]>
> >> Date: Tuesday, March 16, 1999 11:26 PM
> >> Subject: ejbCreate( ) - initialize instance variables
> >>
> >> >The spec mentions that ejbCreate( ) initializes instance variables.
> >> >
> >> >Question 1. Who's reponsibility is that in CMP beans ? The containers or
> >> the
> >> >bean developers?
> >> >
> >> >If the answer to above is Bean Developer, then:
> >> >Q2. If the instance variable is declared as public String county =
> "USA";
> >> >and the bean developer does not reinitialize it in ejbCreate(), then
> does
> >> >the container have the right to initialize it to unpredicatable values ?
> >> >
> >> >Thanks for your help.
> >> >
> >>
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> >> >
> >> >
> >>
> >>
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>
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