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From: Madhav Bhargava <Madhav_Bhargava@infosys.com>
To: MyFaces Discussion <users@myfaces.apache.org>
Date: Fri, 12 Dec 2008 16:15:28 +0530
Subject: RE: Displaying messages over the content - generated by the content?
Thread-Topic: Displaying messages over the content - generated by the
 content?
Thread-Index: AclcOtWOYmn99gvPRt2DbQmWwh0JVQABhMIg
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Madhav=20Bhargava=20schrieb:
>=20Felix.Becker@t-systems.com=20schrieb:
>=20=20=20
>>=20Hi,
>>
>>=20I've=20got=20a=20JSF=20page=20divided=20in=202=20parts=20-=20the=20s=
tatus=20message=20area=20and
>>=20the=20content=20area.=20The=20content=20area=20is=20positioned=20und=
er=20the=20status
>>=20message=20area.=20In=20the=20status=20area=20all=20messages=20for=20=
the=20user=20should=20be
>>=20shown=20-=20for=20example=20success=20messages,=20error=20messages=
=20and=20exceptions.
>>=20In=20my=20content=20area=20I've=20got=20a=20<tr:dataTable
>>=20value=3D"#{myBean.values}"..>.=20When=20the=20method=20getValues()=
=20of=20myBean
>>=20throws=20an=20exception,=20I'm=20catching=20this=20exception.=20I=20=
want=20to=20display
>>=20this=20exception=20in=20the=20status=20message=20area=20-=20but=20th=
is=20does=20not=20work=20-
>>=20apparently=20because=20the=20status=20area=20is=20already=20rendered=
=20when=20the
>>=20content=20el-methods=20are=20called.=20Is=20there=20any=20solution=
=20for=20this=20problem?
>>=20Is=20it=20possible=20to=20render=20the=20status=20area=20at=20last?
>>
>>=20=20=20=20=20
>=20One=20quick=20solution=20can=20be=20to=20call=20a=20javascript=20func=
tion=20on=20onload.=20This=20function=20can=20do=20an=20ajax=20submit=20a=
nd=20re-render=20the=20status=20area=20of=20your=20JSP.=20If=20there=20ar=
e=20any=20error=20messages=20then=20that=20will=20displayed=20else=20noth=
ing=20will=20be=20displayed.=20
>=20If=20you=20want=20more=20control=20then=20do=20not=20add=20the=20Face=
sMessage=20to=20the=20FacesContext,=20instead=20handle=20it=20yourself.
>=20=20=20

Simon=20wrote:

>Will=20re-rendering=20messages=20using=20a=20separate=20ajax=20request=
=20work?

>FacesMessage=20objects=20are=20attached=20to=20the=20FacesContext,=20not=
=20the=20view.=20And
>a=20FacesContext=20is=20a=20request-scoped=20object.=20So=20AFAIK,=20a=
=20second=20request
>will=20always=20see=20an=20empty=20messages=20list...

>Regards,
>Simon

Yes=20you=20are=20right.=20What=20I=20was=20talking=20about=20was=20a=20s=
imple=20hack.=20For=20specific=20messages=20like=20the=20ones=20that=20ar=
e=20generated=20during=20the=20render=20response=20you=20do=20not=20add=
=20it=20to=20the=20FacesContext.=20Instead=20you=20maintain=20them=20into=
=20a=20separate=20list=20whose=20scope=20is=20say=20conversation=20scope=
=20rather=20than=20a=20request=20scope.=20When=20the=20page=20is=20render=
ed,=20onbody=20is=20called=20which=20will=20see=20if=20there=20are=20any=
=20messages.=20Component=20like=20t:messages=20will=20inherently=20read=
=20from=20FacesContext.=20You=20can=20create=20your=20own=20component=20e=
xtending=20say=20t:messages=20and=20read=20from=20a=20different=20source=
=20as=20well.

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