[kepler-users] Bi-directional pipe (equiv. to loop?)

[Ilkay Altintas]

Short answers interspersed below...

On Dec 1, 2005, at 11:36 AM, Maurice Yarrow wrote:

> Hello Kepler users:
>
> This is probably a bunch of trivial questions, but...
>
> Are any of the following possible:
>
>
>   (1) A fires B, then (2) B fires A:
>
>        -------     (1)    -------
>        |     |----------->|     |
>        |  A  |            |  B  |     (I would assume this is
>        |     |<-----------|     |      trivially possible)
>        -------     (2)    -------


This might be domain dependent, but it is possible for many domains.

>
>
>   A and B communicate on same pipe (like socket communication)
>
>        -------            -------
>        |     |            |     |
>        |  A  |<---------->|  B  |     (I would assume this is
>        |     |            |     |      not possible)
>        -------            -------
>

You can have inout ports. So this would be possible sing those. I've  
never used an bidirectional port myself.

> I assume this immediately above not possible because pipes (paths)
> are unidirectional (?)
>
>
> And lastly, can A conditionally send to either B or C ?
>
>        -------            -------
>        |     |  (true)          |
>        |  A  |----------->|  B  |
>        |     |            |     |
>        -------            -------
>           |
>           | (false)                   (I would assume that this
>           |                            is also trivially possible,
>           V                            and that if this were NOT
>        -------                         possible, then what would
>        |     |                         be the point of workflow
>        |  C  |                         at all !)
>        |     |
>        -------
>


This is possible.

-ilkay


>
> Maurice Yarrow
>
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