[prev in list] [next in list] [prev in thread] [next in thread]
List: dia-list
Subject: Re: Loading a dia file using java
From: Luis Villa <lvillap () gmail ! com>
Date: 2015-06-10 14:15:48
Message-ID: CAFmNmnobuTV0SN3g3WDYowv+DZrzBLrGdmN9hc0a3bofGJ0CEw () mail ! gmail ! com
[Download RAW message or body]
[Attachment #2 (multipart/alternative)]
Hello,
My intentions are more modest than a bpm platform. They were more like
this: http://flow4jeclipse.sourceforge.net/docs/index.html
Just to generate simple classes that implement simple workflows through
simple source code (nothing about persistence, SOA, etc).
Regards,
Luis
El mar., 9 jun. 2015 a las 22:13, Alejandro Imass (<aimass@yabarana.com>)
escribi=C3=B3:
> On Tue, Jun 9, 2015 at 10:39 AM, Luis Villa <lvillap@gmail.com> wrote:
> > Hello,
> >
> > I'm trying to create java code from a workflow diagram. I'll look into
> > dia2code, but the person that asked me to develop the utility wants it
> to be
> > in java. Anyway, I'll look into it and, if I arrive to any conclusion,
> I'll
> > share it.
> >
>
> Well that sounds like a pretty wild request and I believe there must
> be some misunderstanding on the requirement.
>
> Usually you don't translate Workflow to code directly (e.g. Java) but
> rather to some declarative workflow definition and is usually in one
> of two forms: EPC or Petri net.
>
> So for example you would take a UML 2 Activity Diagram (similar to a
> flow chart) and translate yo some Workflow XML such as:
> http://search.cpan.org/~jonasbn/Workflow-1.41/lib/Workflow.pm#SYNOPSIS
>
> I can't speak for the Java world but there are surely some standard
> off-the-shelf Workflow engines that work much the same way as the one
> above. I mean it would be very hard to develop a workflow code
> generator from scratch and is not even practical or useful.
>
> The actual (e.g. Java) code should already exist in the actions
> themselves as atomic procedures that are re-used in your workflow. In
> Bonita for example the action itself is usually a Groovy script or a
> call to an API of some sort. Same concept here.
>
> Just as an idea a good architecture to deploy such a Workflow in Java
> would probably be OSGi, where you could have a SOA model in JVM. So
> individual actions are modelled as services and the workflow just
> calls these services with IN/OUT params specified in the workflow....
> OSGi would make it easy to add/evolve services without even restarting
> the engine. Would surely beat the crap out of many commercial WF
> engines I have played with.
>
> Best,
> Alejandro Imass
> _______________________________________________
> dia-list mailing list
> dia-list@gnome.org
> https://mail.gnome.org/mailman/listinfo/dia-list
> FAQ at http://live.gnome.org/Dia/Faq
> Main page at http://live.gnome.org/Dia
>
>
[Attachment #5 (text/html)]
<div dir="ltr">Hello,<br><br>My intentions are more modest than a bpm platform. They \
were more like this: <a \
href="http://flow4jeclipse.sourceforge.net/docs/index.html">http://flow4jeclipse.sourceforge.net/docs/index.html</a><div><br></div><div>Just \
to generate simple classes that implement simple workflows through simple source code \
(nothing about persistence, SOA, \
etc).</div><div><br></div><div>Regards,</div><div>Luis</div></div><br><div \
class="gmail_quote"><div dir="ltr">El mar., 9 jun. 2015 a las 22:13, Alejandro Imass \
(<<a href="mailto:aimass@yabarana.com">aimass@yabarana.com</a>>) \
escribió:<br></div><blockquote class="gmail_quote" style="margin:0 0 0 \
.8ex;border-left:1px #ccc solid;padding-left:1ex">On Tue, Jun 9, 2015 at 10:39 AM, \
Luis Villa <<a href="mailto:lvillap@gmail.com" \
target="_blank">lvillap@gmail.com</a>> wrote:<br> > Hello,<br>
><br>
> I'm trying to create java code from a workflow diagram. I'll look \
into<br> > dia2code, but the person that asked me to develop the utility wants it \
to be<br> > in java. Anyway, I'll look into it and, if I arrive to any \
conclusion, I'll<br> > share it.<br>
><br>
<br>
Well that sounds like a pretty wild request and I believe there must<br>
be some misunderstanding on the requirement.<br>
<br>
Usually you don't translate Workflow to code directly (e.g. Java) but<br>
rather to some declarative workflow definition and is usually in one<br>
of two forms: EPC or Petri net.<br>
<br>
So for example you would take a UML 2 Activity Diagram (similar to a<br>
flow chart) and translate yo some Workflow XML such as:<br>
<a href="http://search.cpan.org/~jonasbn/Workflow-1.41/lib/Workflow.pm#SYNOPSIS" \
rel="noreferrer" target="_blank">http://search.cpan.org/~jonasbn/Workflow-1.41/lib/Workflow.pm#SYNOPSIS</a><br>
<br>
I can't speak for the Java world but there are surely some standard<br>
off-the-shelf Workflow engines that work much the same way as the one<br>
above. I mean it would be very hard to develop a workflow code<br>
generator from scratch and is not even practical or useful.<br>
<br>
The actual (e.g. Java) code should already exist in the actions<br>
themselves as atomic procedures that are re-used in your workflow. In<br>
Bonita for example the action itself is usually a Groovy script or a<br>
call to an API of some sort. Same concept here.<br>
<br>
Just as an idea a good architecture to deploy such a Workflow in Java<br>
would probably be OSGi, where you could have a SOA model in JVM. So<br>
individual actions are modelled as services and the workflow just<br>
calls these services with IN/OUT params specified in the workflow....<br>
OSGi would make it easy to add/evolve services without even restarting<br>
the engine. Would surely beat the crap out of many commercial WF<br>
engines I have played with.<br>
<br>
Best,<br>
Alejandro Imass<br>
_______________________________________________<br>
dia-list mailing list<br>
<a href="mailto:dia-list@gnome.org" target="_blank">dia-list@gnome.org</a><br>
<a href="https://mail.gnome.org/mailman/listinfo/dia-list" rel="noreferrer" \
target="_blank">https://mail.gnome.org/mailman/listinfo/dia-list</a><br> FAQ at <a \
href="http://live.gnome.org/Dia/Faq" rel="noreferrer" \
target="_blank">http://live.gnome.org/Dia/Faq</a><br> Main page at <a \
href="http://live.gnome.org/Dia" rel="noreferrer" \
target="_blank">http://live.gnome.org/Dia</a><br> <br>
</blockquote></div>
_______________________________________________
dia-list mailing list
dia-list@gnome.org
https://mail.gnome.org/mailman/listinfo/dia-list
FAQ at http://live.gnome.org/Dia/Faq
Main page at http://live.gnome.org/Dia
[prev in list] [next in list] [prev in thread] [next in thread]
Configure |
About |
News |
Add a list |
Sponsored by KoreLogic