RE: [Springframework-developer] Web Flow progress

[David H. <dh...@ob...>]

I=20have=20a=20couple=20of=20comments=20about=20Webflow=20based=20on=20my=20=
usage=20in=20a=20current=20application.
=20
Firstly,=20FlowController=20is=20responsible=20for=20creating=20its=20own=20=
HttpFlowExecutionManager=20-=20I=20guess=20I=20don't=20understand=20why=20=
this=20isn't=20a=20dependency=20that's=20injected=20in=20the=20traditional=
=20way.=20I=20had=20to=20subclass=20the=20existing=20flow=20execution=20ma=
nager=20to=20get=20some=20behaviour=20I=20desired=20(storing=20flow=20exec=
utions=20in=20the=20servlet=20context,=20rather=20than=20the=20session),=20=
and=20the=20current=20structure=20meant=20I=20also=20had=20to=20subclass=20=
FlowController.=20
=20
Secondly,=20it=20would=20be=20nice=20if=20the=20exceptions=20thrown=20to=20=
indicate=20missing=20state=20or=20actions=20actually=20provided=20accessor=
s=20to=20expose=20which=20state/action=20was=20missing.=20Currently=20I=20=
have=20immplemented=20fallback=20logic=20such=20that=20if=20an=20action=20=
is=20not=20found=20in=20the=20current=20flow,=20I=20can=20check=20in=20the=
=20parent=20flow(s)=20and=20handle=20back=20button=20issues=20with=20subfl=
ows=20quite=20elegantly.=20My=20logic=20would=20have=20been=20simpler=20if=
=20the=20caught=20exception=20indicated=20the=20state/action=20that=20was=20=
the=20problem.
=20
Thanks,
-Dave=20

________________________________

From:=20s...@li...=20on=20behal=
f=20of=20Erwin=20Vervaet
Sent:=20Tue=2022/03/2005=2020:22
To:=20s...@li...
Subject:=20[Springframework-developer]=20Web=20Flow=20progress



All,

We've=20been=20making=20very=20good=20progress=20on=20the=20web=20flow=20s=
ystem=20the=20last=20few
days.=20Things=20are=20shaping=20up=20for=20a=20preview=20release=20that=20=
might=20come=20as=20soon=20as
next=20weekend!

The=20code=20is=20in=20good=20shape=20again=20and=20all=20JavaDoc=20is=20u=
p-to-date.=20All=20samples
are=20also=20working=20again.
For=20those=20with=20an=20interest=20in=20web=20flows,=20I=20fully=20recom=
mend=20that=20you=20take=20a
look=20at=20the=20code=20that=20is=20in=20CVS=20right=20now
(http://cvs.sourceforge.net/viewcvs.py/springframework/spring/sandbox/src/=
org/springframework/web/flow/)
and=20let=20us=20know=20what=20you=20think!=20Any=20input=20would=20be=20a=
ppreciated!

Issues=20left=20to=20work=20out=20(not=20necessarily=20for=20the=20preview=
=20release=20:):

*=20Conditional=20transitions:=20basic=20support=20is=20there=20(via=20Tra=
nsitionCriteria
interface=20and=20a=20simple=20OgnlTransitionCriteria=20implementation),=20=
but=20details
have=20to=20be=20worked=20out:
=20=20=20=20-=20how=20to=20integrate=20this=20into=20XML=20flow=20definiti=
ons?
=20=20=20=20-=20scope=20precedence?=20or=20should=20all=20scopes=20be=20me=
rged=20before=20being
evaluated=20by=20the=20expression?

*=20Token=20based=20transitions=20(e.g.=20<transition=20on=3D"countrySelec=
ted"
to=3D"register.${request.country}"/>):=20do=20we=20need=20this?=20There=20=
is=20no=20support
for=20this=20at=20the=20moment.

*=20Does=20the=20RequestContext=20need=20to=20keep=20track=20of=20a=20hist=
ory=20of=20events=20signaled
during=20its=20lifecycle?=20It's=20not=20the=20case=20for=20the=20moment=20=
but=20would=20be=20simple
to=20implement.=20Also,=20do=20we=20need=20a=20query=20interface=20to=20fi=
nd=20an=20event=20parameter
across=20all=20signaled=20events=20for=20a=20particular=20request?=20Are=20=
there=20any=20good
use-cases=20for=20this?

*=20Do=20we=20need=20some=20convenience=20accessor=20on=20the=20RequestCon=
text=20to=20find
attributes=20in=20any=20scope:=20try=20request=20scope=20first,=20then=20f=
all=20back=20on=20flow
scope?=20This=20would=20be=20simple=20to=20add.

Erwin=20Vervaet
erw...@er...



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