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Dynamic Successor

lcarr

TS 6.01 on Solaris.

I have an externaltask that is activated by one of several grouptasks. I want all the grouptasks to go to this externaltask on timeout in order to send a timeout notification e-mail. I then want the externaltask to transition back to the invoking grouptask, but do not know how to make the externaltask aware of which sucessor to transition to.

I have used externaltask callback to do something similar, but in this case the externaltask is generic (it does and should not care who it's predecessor is) and always returns the same callback code.

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Comments

Adam Stoller

You are trying to use a single externaltask definition - yes? How about having each grouptask use the wfvarfinishop attribute to set the callback value for the externaltask script? Something like this:<workflow ...>
<variables>
<variable key="cbval" value=""/>
</variables>
...
<grouptask name="grp1" ... >
...
<wfvarfinishop op="set" name="cbval" value="1"/>
...
</grouptask>
<grouptask name="grp2" ... >
...
<wfvarfinishop op="set" name="cbval" value="2"/>
...
</grouptask>
<grouptask name="grp3" ... >
...
<wfvarfinishop op="set" name="cbval" value="3"/>
...
</grouptask>
<externaltask ...>
...
</externaltask>
...
</workflow>Then the externaltask can do something like this:...
my($jobid, $taskid) = @ARGV;
my $task = new TeamSite::WFtask($taskid);
my $job = new TeamSite::WFworkflow($jobid);
...
$task->CallBack($job->GetVariable("cbval"), "Done");

--fish
Senior Consultant, Quotient Inc.
http://www.quotient-inc.com

lcarr

I've never heard of wfvarfinishop, but this is perfect for what I needed to do. From your code example, I just had to change the cbval to start at 0 (not 1). Everything working as desired now. Huge thanks!

Migrateduser

This is something I never really noticed or used, but is a convenient way to be able to set workflow variables in tasks. I looked the definition of this attribute in the Workflow manual, and of course the doc is misprinted in about a dozen different places in the manual regarding attributes. In the full Job Spec DTD (currently on page 116) it shows wfvarstartop and wfvarfinishop as possible attributes for every task. But when you look at the DTD specs for each individual task, some don't show these attributes as being available, such as usertask, endtask, and dummytask. When you look at the actual iwwf.dtd file, it matches the Job Spec DTD on page 116. I'm sure the manual has been inaccurate for the individual task DTDs for years.

Dave Smith
Sr. Software Engineer
Nike, Inc.
(503) 671-4238
DavidH.Smith@nike.com

Adam Stoller

What! The docs wrong! Say it isn't so Smitty, say it isn't so! :-)

Actually, I've never used this feature either - but I always thought it would come in handy one day.

--fish
Senior Consultant, Quotient Inc.
http://www.quotient-inc.com

santoshrt

Hi,

I tried your approach of using <wfvarfinishop op="set" name="cbval" value="1"/>..but adding this tag in the user task and dummy task results in a error starting workflow job.
If I remove this tag there is no error.
Any idea what might be wrong.

Thanks
Santosh

Adam Stoller

Hi,

I tried your approach of using <wfvarfinishop op="set" name="cbval" value="1"/>..but adding this tag in the user task and dummy task results in a error starting workflow job.
If I remove this tag there is no error.
Any idea what might be wrong.

Thanks
Santosh

"results in an error" - what error?
Did you check all the log files (including iwjoberrors.log) to see if there were more details?
As I don't have a server to play with this right now there's little more for me to suggest other than perhaps if you post the actual WFT that "results in an error" someone might be able to see what's wrong.

yuvpurush

You are trying to use a single externaltask definition - yes? How about having each grouptask use the wfvarfinishop attribute to set the callback value for the externaltask script? Something like this:<workflow ...>
<variables>
<variable key="cbval" value=""/>
</variables>
...
<grouptask name="grp1" ... >
...
<wfvarfinishop op="set" name="cbval" value="1"/>
...
</grouptask>
<grouptask name="grp2" ... >
...
<wfvarfinishop op="set" name="cbval" value="2"/>
...
</grouptask>
<grouptask name="grp3" ... >
...
<wfvarfinishop op="set" name="cbval" value="3"/>
...
</grouptask>
<externaltask ...>
...
</externaltask>
...
</workflow>Then the externaltask can do something like this:...
my($jobid, $taskid) = @ARGV;
my $task = new TeamSite::WFtask($taskid);
my $job = new TeamSite::WFworkflow($jobid);
...
$task->CallBack($job->GetVariable("cbval"), "Done");

--fish
Senior Consultant, Quotient Inc.
http://www.quotient-inc.com

Hi,
Im using TS 6.5, Win2k server.

There are 2 user tasks for approver1 and approver2.
I've used the following code in both the user tasks

<wfvarfinishop op="set" name="fop_reviewer" value="__INSERT__($Approver1);"/>
and
<wfvarfinishop op="set" name="fop_reviewer" value="__INSERT__($Approver2);"/>
respectively

In the next external task, im getting the approver name by referring
$approverName =$job->GetVariable('fop_reviewer');

Approver 1 and 2 tasks are connected to the external task by "OR" .
If the external task is activated either by approver1 or approver2, the job variable fop_reviewer always has the value of the approver1 name.

Has anybody encountered similar problem or am i doing something wrong in using the "wfvarfinishop"?

Adam Stoller

Hi,
Im using TS 6.5, Win2k server.

There are 2 user tasks for approver1 and approver2.
I've used the following code in both the user tasks

<wfvarfinishop op="set" name="fop_reviewer" value="__INSERT__($Approver1);"/>
and
<wfvarfinishop op="set" name="fop_reviewer" value="__INSERT__($Approver2);"/>
respectively

In the next external task, im getting the approver name by referring
$approverName =$job->GetVariable('fop_reviewer');

Approver 1 and 2 tasks are connected to the external task by "OR" .
If the external task is activated either by approver1 or approver2, the job variable fop_reviewer always has the value of the approver1 name.

Has anybody encountered similar problem or am i doing something wrong in using the "wfvarfinishop"?

It would help if you could provide the job specification file or a diagram of it - because I'm not sure where you split your process prior to the usertasks that you say are connected by an OR to the externaltask which you want to somehow know which task actually preceded it (right?)

yuvpurush

Hi,

Pls find attached job specification file.

The external tasks "Write OD Success", "Write OD Failure", "Write Reject" and "Write Terminate" all uses the same ipl file. Im determining which task had called them using the task variable "tv_Status".

Since the approver can be any one of the two approvers, i need the approver name, who approved or rejected. For that im using wfvarfinishop, in which im encountering the problem. Any help is highly appriciated.