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Date: Mon, 12 Jul 2010 12:18:18 -0700 (PDT)
From: qin ding <qinding1@yahoo.com>
Subject: Re: [scxml] passing data to the state
To: Commons Users List <user@commons.apache.org>
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Thank you, Rahaul, for your quick=A0response.=A0 =0A=0AIf I do the followin=
g:=0A=0APlayer p =3D ... // POJO from game client=0A=A0 getEngine().getRoot=
Context().set("player", p);=0A=0Athen in the states, I should do this to ge=
t it out, right?=0APlayer p =3D (Player) getEngine().getRootContext().get("=
player");=0A=0ASomehow, when I do this, I get null out of the RootContext()=
.=A0 Any idea?=0A=0AI will study the link you sent to me.=0A=0A=0A=0A----- =
Original Message ----=0AFrom: Rahul Akolkar <rahul.akolkar@gmail.com>=0ATo:=
 Commons Users List <user@commons.apache.org>=0ASent: Mon, July 12, 2010 1:=
02:04 PM=0ASubject: Re: [scxml] passing data to the state=0A=0AOn Mon, Jul =
12, 2010 at 12:49 PM, qin ding <qinding1@yahoo.com> wrote:=0A> I am learnin=
g commons scxml.=A0 I am experimenting writing a poker game using=0A> activ=
emq and scxml.=0A>=0A>=0A> So, I have my config xml defined as follows:=0A>=
=0A> <?xml version=3D"1.0"?>=0A> <scxml xmlns=3D"http://www.w3.org/2005/07/=
scxml"=0A> =A0=A0=A0=A0=A0=A0 version=3D"1.0"=0A> =A0=A0=A0=A0=A0=A0 initia=
lstate=3D"waitingRound">=0A> =A0=A0=A0 <datamodel>=0A> =A0=A0=A0=A0=A0=A0=
=A0 <data name=3D"inputPlayer">=0A> =A0=A0=A0=A0=A0=A0=A0=A0=A0 <!-- Note n=
amespace declaration in line below -->=0A> =A0=A0=A0=A0=A0=A0=A0=A0=A0 <pla=
yer xmlns=3D"com.mgt.lottery.poker.domain">=0A> =A0=A0=A0=A0=A0=A0=A0=A0=A0=
=A0=A0 <id/>=0A> =A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0 <name/>=0A> =A0=A0=A0=A0=
=A0=A0=A0=A0=A0=A0=A0 <chips/>=0A> =A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0 <sitin=
/>=0A> =A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0 <winner/>=0A> =A0=A0=A0=A0=A0=A0=
=A0=A0=A0=A0=A0 <betOption/>=0A> =A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0 <gainedC=
hips/>=0A> =A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0 <popocketCards/>=0A> =A0=A0=A0=
=A0=A0=A0=A0=A0=A0=A0=A0 <description/>=0A> =A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=
=A0 <bestHand/>=0A> =A0=A0=A0=A0=A0=A0=A0=A0=A0 </player>=0A> =A0=A0=A0=A0=
=A0=A0=A0 </data>=0A> =A0=A0=A0 </datamodel>=0A> =A0=A0=A0 <state id=3D"wai=
tingRound">=0A> =A0=A0=A0=A0=A0=A0=A0 <!-- shuffle deck and check players a=
nd empty pot -->=0A> =A0=A0=A0=A0=A0=A0=A0 <transition event=3D"game.start"=
 target=3D"preflopRound"/>=0A> =A0=A0=A0 </state>=0A> =A0=A0=A0 <state id=
=3D"preflopRound">=0A> =A0=A0=A0=A0=A0=A0=A0 <!-- place small/big blinds in=
 pot and deal each player two hole cards=0A> -->=0A> =A0=A0=A0=A0=A0=A0=A0 =
<transition target=3D"firstBettingRound"/>=0A> =A0=A0=A0 </state>=0A> =A0=
=A0=A0 <state id=3D"firstBettingRound">=0A> =A0=A0=A0=A0=A0=A0=A0 <transiti=
on event=3D"game.flop" target=3D"flopRound"/>=0A> =A0=A0=A0=A0=A0=A0=A0 <tr=
ansition event=3D"game.showdown" target=3D"showdownRound"/>=0A> =A0=A0=A0 <=
/state>=0A> =A0=A0=A0 <state id=3D"flopRound">=0A> =A0=A0=A0=A0=A0=A0=A0 <!=
-- deal three cards in the community -->=0A> =A0=A0=A0=A0=A0=A0=A0 <transit=
ion target=3D"secondBettingRound"/>=0A> =A0=A0=A0 </state>=0A> =A0=A0=A0 <s=
tate id=3D"secondBettingRound">=0A> =A0=A0=A0=A0=A0=A0=A0 <onentry>=0A> =A0=
=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0 <var name=3D"inputPlayer" expr=3D"#{request$=
player}" />=0A> =A0=A0=A0=A0=A0=A0=A0 </onentry>=0A> =A0=A0=A0=A0=A0=A0=A0 =
<transition event=3D"game.turn" target=3D"turnRound"/>=0A> =A0=A0=A0=A0=A0=
=A0=A0 <transition event=3D"game.showdown" target=3D"showdownRound"/>=0A> =
=A0=A0=A0 </state>=0A> =A0=A0=A0 <state id=3D"turnRound">=0A> =A0=A0=A0=A0=
=A0=A0=A0 <!-- deal a 4th card in the community -->=0A> =A0=A0=A0=A0=A0=A0=
=A0 <transition target=3D"thirdBettingRound"/>=0A> =A0=A0=A0 </state>=0A> =
=A0=A0=A0 <state id=3D"thirdBettingRound">=0A> =A0=A0=A0=A0=A0=A0=A0 <!-- d=
eal a 4th card in the community -->=0A> =A0=A0=A0=A0=A0=A0=A0 <onentry>=0A>=
 =A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0 <var name=3D"inputPlayer" expr=3D"#{requ=
est$player}" />=0A> =A0=A0=A0=A0=A0=A0=A0 </onentry>=0A> =A0=A0=A0=A0=A0=A0=
=A0 <transition event=3D"game.final" target=3D"finalRound"/>=0A> =A0=A0=A0=
=A0=A0=A0=A0 <transition event=3D"game.showdown" target=3D"showdownRound"/>=
=0A> =A0=A0=A0 </state>=0A> =A0=A0=A0 <state id=3D"finalRound">=0A> =A0=A0=
=A0=A0=A0=A0=A0 <!-- deal a 5th card in the community -->=0A> =A0=A0=A0=A0=
=A0=A0=A0 <transition target=3D"finalBettingRound"/>=0A> =A0=A0=A0 </state>=
=0A> =A0=A0=A0 <state id=3D"finalBettingRound">=0A> =A0=A0=A0=A0=A0=A0=A0 <=
!-- bet, check, call, raise, or fold -->=0A> =A0=A0=A0=A0=A0=A0=A0 <onentry=
>=0A> =A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0 <var name=3D"inputPlayer" expr=3D"#=
{request$player}" />=0A> =A0=A0=A0=A0=A0=A0=A0 </onentry>=0A> =A0=A0=A0=A0=
=A0=A0=A0 <transition event=3D"game.showdown" target=3D"showdownRound"/>=0A=
> =A0=A0=A0 </state>=0A> =A0=A0=A0 <state id=3D"showdownRound">=0A> =A0=A0=
=A0=A0=A0=A0=A0 <transition event=3D"game.reset" target=3D"waitingRound"/>=
=0A> =A0=A0=A0 </state>=0A> </scxml>=0A>=0A> My questions:=0A> How can I pa=
ss my pojo "Player" to the firstBettingRound, secondBettingRound =0A>and=0A=
> etc?=A0This player object is coming from game client with betting informa=
tion.=0A>=0A<snip/>=0A=0AData (including POJOs) can be passed into an execu=
tor either via an=0Aexternal event's payload or via procedural injection to=
 the executor's=0Aroot context.=0A=0ASo, as an example of the latter, the f=
ollowing will create a variable=0A"player" in the executor's root context a=
nd bind the POJO to it:=0A=0A=A0 Player p =3D ... // POJO from game client=
=0A=A0 getEngine().getRootContext().set("player", p);=0A=0ASubsequently, th=
e variable "player" may be used in expressions in the=0Astate machine.=0A=
=0AIn the above state machine, the variable "inputPlayer" doesn't seem to=
=0Abe accessed anywhere, so unless the player information is needed for=0At=
he state machine logic, it can perhaps stay out of the state=0Amachine's ro=
ot context altogether (given the pattern of use you=0Amention below).=0A=0A=
=0A> After the activemq delivers it to the server end,=A0 how can I know wh=
ich method=0A> to call?=A0 I think scxml handles the the state of game, so =
I have to say=0A>=0A>=0A> Set states =3D getEngine().getCurrentStatus().get=
States();=0A> =A0=A0=A0=A0=A0=A0=A0 return ((org.apache.commons.scxml.model=
.State) states.iterator().=0A> =A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=
=A0 next()).getId();=0A>=0A> if the current state is firstBettingRound,=A0 =
I do=0A> game.firstBettingRound(player);=A0 Is it correct=0A>=0A<snap/>=0A=
=0AIf you wanted to map states to activities that way. There are a few=0Apa=
tterns that are commonly used, see:=0A=0A=A0 http://commons.apache.org/scxm=
l/guide/using-commons-scxml.html=0A=0A-Rahul=0A=0A=0A> I seem unable to fin=
d the example to show me how to pass pojo to the state=0A> correcponded met=
hod.=A0 If I am completely wrong with my approach, Please =0Aadvise.=0A> Th=
ank you very much.=0A>=0A> QD=0A>=0A=0A------------------------------------=
---------------------------------=0ATo unsubscribe, e-mail: user-unsubscrib=
e@commons.apache.org=0AFor additional commands, e-mail: user-help@commons.a=
pache.org=0A=0A=0A      

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