[kepler-dev] SampleDelay Actor Query

[subhav mital]

Hi,

Just wondering if any one has any idea on how to proceed or has implemented
anything similar? Just a conditional branching execution, but in this case,
both the conditions get executed despite having enforced a condition.

Would be glad to know your thoughts/suggestions.

Thanks.


On Tue, Apr 20, 2010 at 7:47 PM, subhav mital <mital.subhav at gmail.com>wrote:

> Hi,
>
> Please find attached my workflow is currently giving some errors which I am
> unable to ascertain why
> ?
>
> I wish to simulate the following:
>
> Move from Stage 0 to Stage 1. At the end of Stage 1, it must prompt the
> user with an option to either execute Stage 2 (the next stage) or execute
> the previous stage (Stage 0) again.
>
> Is there any way to do this? (Would be glad to know) As of now, both sides
> of the branches get executed, despite putting the condition for each branch.
> (i.e input==1 perform xyz else perform abc if input==0).
>
> I have tried all actors and directors but get some error. Would be glad if
> someone can help in this and suggest ways to proceed?
>
>
> Thanks.
>
>
> On Mon, Apr 5, 2010 at 3:39 AM, Jianwu Wang <jianwu at sdsc.edu> wrote:
>
>>  Hi Subhav,
>>
>>     I'm not familiar with Sample Delay Actor. Maybe some one else can
>> help.
>>
>>     About yhour workflow pausing until some condition is met. It seems to
>> me that you can use 'Boolean Switch' to do it. Let the false branch be
>> connected to its input, so that the 'Boolean Switch' actor will wait for
>> another condition if the current condition is false. The true branch will be
>> connected to the sub-workflow you want to execute.
>>
>>     I attached a sample workflow using  'Boolean Switch' and 'Interactive
>> Shell' actor. Yet one weird phenomena of its execution is that the output is
>> according to the previous input in 'Interactive Shell', not the current one.
>> I'll keep digging it.
>>
>> Best wishes
>>
>> Sincerely yours
>>
>> Jianwu Wangjianwu at sdsc.eduhttp://users.sdsc.edu/~jianwu/
>>
>> Scientific Workflow Automation Technologies (SWAT) Laboratory
>> San Diego Supercomputer Center
>> University of California, San Diego
>> San Diego, CA, U.S.A.
>>
>>
>> On 4/4/2010 5:15 PM, subhav mital wrote:
>>
>> Alternatively, is there any actor that "pauses" the workflow until some
>> condition is met?
>>
>>  ie. Similar to a flag value which upon getting reset (0), halts the
>> workflow and upon getting set (1) resumes the workflow.
>>
>>  Thanks.
>>
>>
>> On Sun, Apr 4, 2010 at 8:09 PM, subhav mital <mital.subhav at gmail.com>wrote:
>>
>>> Hi,
>>>
>>>  I wish to use the Sample Delay Actor but am confused how is it used to
>>> resolve deadlocks? Please let me know if there is any sample demo of this?
>>>
>>>  Moreover, the documentation of interactive shell actor states: "The
>>> actor is typically preceded by a SampleDelay actor, which provides an
>>> initial welcome message or instructions"
>>>
>>>  Any explanation on how to incorporate these welcome messages?
>>>
>>>  Thanks...
>>>
>>>
>>
>> _______________________________________________
>> Kepler-dev mailing list
>> Kepler-dev at kepler-project.orghttp://mercury.nceas.ucsb.edu/kepler/mailman/listinfo/kepler-dev
>>
>>
>
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