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From: Martin Gainty <mgainty@hotmail.com>
To: <user@commons.apache.org>
Subject: RE: Managing content in an SCXML file
Date: Tue, 3 Nov 2009 18:10:11 -0500
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Cedric

a markup implies SGML..i assume this might be described as XSD or XML Schem=
a Definition?
Can you describe the events this state-machine model would support?
can you describe the content each event would carry and or generate?
Can you describe what would be contained in the header for each Event?
Can you describe what the body would look like for each event?

You might be able to implement a simple listener that listens on fixed host=
/port and when message is received (EOT is achieved after receiving header =
and body)
you can hand the body of the message to device

can you confine the size of the message?=20
if not you might want to implement a packet model to buffer the packets to =
a known structure
(as in some sort of linked-list)=20
until body EOT is achieved=20

sounds like a fun project!
Bon Chance
Martin Gainty=20
______________________________________________=20
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> From: cedric.nicolas@villefluide.fr
> To: user@commons.apache.org
> Subject: Managing content in an SCXML file
> Date: Tue=2C 3 Nov 2009 23:23:01 +0100
>=20
> Dear Rahul and others=2C
>=20
> I want to do a quite simple thing : having a state machine on a server
> controlling user interface of mobile clients.=20
> The state machine would have a lot of states and complex stream=2C and fo=
r
> some specific states it will embedded a simple markup language content (e=
.g.
> an html subset) that will be delivered to the mobile client which when it
> receives it=2C interpret and display it.
>=20
> For example the server state machine would have "connect" state that will=
 be
> triggered when the mobile is establishing a connection=2C and would react=
 by
> giving to the mobile client the content to be displayed. An simple exampl=
e
> would be :
>=20
> <state id=3D"connect">
> 	<content>
> 		<title> Welcome ! </title>
> 		<button> text=3D"Click here to continue" action =3D"send_OK"
> </button>
> 		<button> text=3D"Quit" action =3D"send_Quit" </button>
> </content>
> 	<transition event=3D"send_OK" target=3D"next_state"/>
> 	<transition event=3D"send_Quit" target=3D"final_state"/>
> </state>
>=20
> In that case the content in <content> tags will be retrieved by the Java
> code on void connect() method=2C and sent to the device. Server will list=
en to
> device and when receiving a message like send_OK=2C trigger this to the s=
tate
> machine.
>=20
> To summarize I want to emulate a tiny web server hosting some tiny pages
> with a state machine.
>=20
> I've gone through all the documentation of Commons Scxml=2C and didn't fi=
nd an
> easy way to do this. The possible ways I see are to use a data model=2C b=
ut
> using <assign> tags for setting my content seems to be quite heavy to wri=
te
> and don't know how to assign an XML tree to a data model node=2C and othe=
r
> possibility would be to use maybe custom actions=2C but how to describe i=
n a
> simple way my XML like-content ?
>=20
> Do you have a suggestion to do this in an easy and readable way ?
>=20
>=20
>=20
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>=20
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