El 10/06/2010 3:45, John Mettraux escribió:
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 => '${user}'
end
end
--->8---
Please note that the user is passed to the subprocess as a variable (no
conflict with your subsequent 'user' field).
This exactly what I'm looking for! Lots of thanks, John. I think sometimes you
must feel like a teacher with awkward students.
(I assume it's OK for you to translate to XML by yourself).
Note : these days I'm using ruote + rails a lot, I'm using a StorageParticipant
and a workitem
field named 'user'. All the delegation occurs without the workitem leaving the
storage participant,
by simply modifiying the value of this 'user' field. Many possibilities.
I don't understand this approach: "all the delegation occurs without the
workitem leaving the storage participant".
Like in a loop?
set 'user' => 'asier'
repeat do
participant '${user}'
stop :unless => "${user}'
end
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 ?
Yes, these exactly are my two questions, but this info being accesible from
ruote-kit. The idea is to know which user has launched the workflow because
participants are mapped to roles. These two questions should be sufficient
because sometimes is very helpful to know if a workitem is the first or last one.
Perhaps it's easy to check for the existence of a field named "launchedBy",
and if not present, add it with the participant name.
---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.
Hmmm, I'm going to use the "launchedBy" wirkitem field approach in the first
step, and something in the line of
echo :stage => 'last'
for the last step, probably modelled with a ruote-amqp participant. Looks a
good and flexible approach.
Again, thanks for your support.
Thanks
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