On Wed, Jun 09, 2010 at 05:42:59PM +0200, Asier wrote:
>
> Currently I'm modeling the "delegate to" option in a workflow step like this:
>
> <participant ref="requestor_notification" on_error="undo"/>
> <participant ref="${user}" if="${user}" />
>
> <participant ref="sales_manager" task="validation"/>
> <participant ref="${user}" if="${user}" />
>
> <participant ref="account_manager" task="sign"/>
> <participant ref="${user}" if="${user}" />
>
> But it looks a bit annoying to have all the ref="${user}" after each
> participant so how do you model this? I've thinked about creating a
> subprocess but in the end looks similar because I must setup the
> field ${usuario}
>
> <process-definition name="participant_with_delegation">
> <participant ref="${usuario}" />
> <participant ref="${user}" if="${user}" />
> </process-definition>
>
> Is there another form to perform this task?
Hi Asier,
you could pass 'parameters' to your subprocess :
http://ruote.rubyforge.org/exp/subprocess.html
under 'passing attributes as variables'
For example :
---8<---
Ruote.process_definition do
sequence do
asier_participant :user => 'juan'
asier_participant :user => 'mafalda'
end
define :name => 'asier_participant' do
participant :ref => '${v:user}'
participant :ref => '${user}' :if => '${user}'
end
end
--->8---
Please note that the user is passed to the subprocess as a variable (no
conflict with your subsequent 'user' field).
(I assume it's OK for you to translate to XML by yourself).
Note : these days I'm using ruote + rails a lot, I'm using a StorageParticipant
and a workitem field named 'user'. All the delegation occurs without the
workitem leaving the storage participant, by simply modifiying the value of
this 'user' field. Many possibilities.
> Another question: is possible to know whithout adding fields in
> which "horizontal" step of the workflow (as seen with ruote-fluo)
> lives a workitem? Sometimes is very helpful to know if the received
> workitem belongs to the first/last participant of a workflow
Ruote-fluo knows the position of a workitem by doing :
workitem.fei.expid
This 'expression id' looks like, for example, '0.1.0'
---8<---
Ruote.process_definition do
alpha
cursor do
bravo
charly
delta
end
echo
end
--->8---
'0.1.0' points to 'bravo'.
It requires a bit of gymnastics to go from workitem.fei.expid + process
definition representation to "I'm in the last step of the process definition".
I could write a few methods for this if you'd like, but what are the questions
that should be answered ?
- am I in the first step ?
- am I in the last step ?
For the steps inside of a sequence, it's vanilla easy, but when it comes to
more dynamic processes, it gets hairy...
Another technique :
---8<---
Ruote.process_definition do
alpha
cursor do
bravo
charly
delta
end
echo :stage => 'last'
end
--->8---
The workitem addressed to the participant 'echo' would have
workitem.fields['params']['stage'] == 'last'
An interesting property of this 'params' subhash is that it's cleared after
each participant.
I hope it helps.
Best regards,
--
John Mettraux - http://jmettraux.wordpress.com
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