Re: [Springframework-developer] customized BeanFactory

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Hi Dave,=20

Working at the getBean() (I assume you meant this method) level is too =
high
that I cannot control the creation of dependent objects. For instance, =
if
bean a depends on bean b, which is actually a web session-scoped bean,
overriding getBean() for "a" does not allow me easily set b on a. By the
time a is created, a new instance of b is already injected into a. I =
then
need to introspect a to find out b and replace it. Not quite efficient =
and
easy.=20

It might work, but I'd like to find out a cleaner solution.=20

Thanks.

Bing

=B7=A2=BC=FE=C8=CB: =
spr...@li...
[mailto:spr...@li...] =
=B4=FA=B1=ED David
Hewitt
=B7=A2=CB=CD=CA=B1=BC=E4: 2005=C4=EA9=D4=C221=C8=D5 23:04
=CA=D5=BC=FE=C8=CB: spr...@li...
=D6=F7=CC=E2: RE: [Springframework-developer] customized BeanFactory

Bing,

What's wrong with using a standard FactoryBean to do this? Your
(non-singleton) FactoryBean could take the value-binding expression
parameter, evaluate it when getObject() is called and the result would =
then
be injected into your property as normal.

Its less terse, but is there any reason why this wouldn't work?

Dave Hewitt

> -----Original Message-----
> From: spr...@li...
> [mailto:spr...@li...] On =
Behalf
> Of Bing Ran
> Sent: 21 September 2005 13:08
> To: spr...@li...
> Subject: Re: [Springframework-developer] customized BeanFactory
>=20
> Thanks Steve. Unfortunately the way that the
> PropertyPlaceHolderBeanfactory
> Works does not meet my need. What I'd like to have is a repeatable
> interpretation of an injected value each time the bean (a prototype) =
is
> created, rather than the one-time post-processing. What I'm doing is
> actually part of my effort to replace the bean management facility of =
JSF
> with what I'm doing on top of Spring (see http://jacn.sf.net). I need =
the
> ability to re-evaluate a JSF value-binding expression such as
> #{param.user_name}, which binds to a parameter in the http request, =
which
> of
> course is different every time a new request comes in.
>=20
> Any insight into this?
>=20
> Bing
>=20
>=20
> -----=D3=CA=BC=FE=D4=AD=BC=FE-----
> =B7=A2=BC=FE=C8=CB: =
spr...@li...
> [mailto:spr...@li...] =
=B4=FA=B1=ED Steven
> Devijver
> =B7=A2=CB=CD=CA=B1=BC=E4: 2005=C4=EA9=D4=C221=C8=D5 17:47
> =CA=D5=BC=FE=C8=CB: spr...@li...
> =D6=F7=CC=E2: Re: [Springframework-developer] customized BeanFactory
>=20
> Bing,
>=20
> You can implement a BeanFactoryPostProcessor to do that. Have a look
> at the code of PropertyPlaceholderConfigurer. This class inspects
> bean definitions and replaces ${key} with property values loaded from
> property files. BeanFactoryPostProcessors are recognized by the bean
> factory and applied automatically.
>=20
> Steven Devijver
> Senior consultant
> @ Interface21
> ste...@in...
>=20
>=20
>=20
> On 21 Sep 2005, at 04:20, Bing Ran wrote:
>=20
>=20
> > I'm implementing my own BeanFactory as a subclass of
> > DefaultListableBeanFactory. What I want to do is to reinterpret
> > injected
> > values on a bean, such as the <value>#{param.userName}</value> part
> > in the
> > bean definition:
> >
> > <bean ...>
> >   <property name=3D"a"> <value>#{param.userName}</value></property>
> > </bean>
> >
> > I'd like to set the value from another source (such as in JSF
> > context) at
> > the time the bean is instantiated. Any tips how my code can get a
> > chance to
> > re-interpret the dependency?
> >
> > Thanks!
> >
> > Bing Ran
> >
> >
> >
> >
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> >
>=20
>=20
>=20
>=20
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