[kepler-dev] Question on linking two multiports

Christopher Brooks cxh at eecs.berkeley.edu
Mon May 7 09:09:49 PDT 2007

Hi Ilkay,
Ptolemy II can handle changes in topology at run time.  You might
need to make these changes via MoMLChangeRequests though.

You could look at the BusAssembler and BusDisassembler actors for
simple multiport examples.  However, these actors do not use

I'm a little bit confused, since the port should have a notion of the
width.  See the BusAssembler and BusDisassembler actors. 



    Norbert, Christopher,
    Thanks for the tips. They might be a quick hack solution for what I  
    would like to do, but I'm afraid it is not dynamic enough. (If I  
    understood it correctly.)
    I'm trying to get data from a sensor dat logger and send the channel  
    data through a multiport. So the width of the link will change each  
    time I access to the data logger server dynamically.
    I tried to set it up in the actor code, but of course it is not the  
    port which has the width so I couldn't set it up from the port.
    So maybe I can get the relations the actor is linked to at runtime  
    and set the width of that relation. Do you think this would choke?
    On May 4, 2007, at 12:27 PM, Christopher Brooks wrote:
    > Another trick is to place a relation between the two, connect
    > the relation to either port, then right click on the relation and set
    > the width.  The width will be displayed numerically next to the
    > relation.
    > This called a bus relation, it was introduced with this change
    > to ptolemy/vergil/kernel/RelationController.java:
    >> revision 1.23
    >> date: 2005/06/27 23:01:56;  author: eal;  state: Exp;  lines: +32 -3
    >> Display bus relations better.
    > This change is present in Ptolemy II 6.0.  I'm not sure about 5.0
    > See also
    > http://www.mail-archive.com/ptolemy- 
    > hackers at bennett.eecs.berkeley.edu/msg00271.html
    > I'm not sure why we don't display the width of links.  It could be
    > because links are not first class objects?  We can set the width of
    > a link to values other than 1, but there is no obvious change.  I
    > believe Edward had a fix for this, but it was lost.
    > _Christopher
    > Norbert writes:
    > --------
    >     Hi Ilkay,
    >     Yes, there is. You should set the single link's width to the  
    > desired
    >     number. I am not sure if current kepler allows you to double  
    > click on a
    >     link, but you can edit the xml file and edit the width  
    > property's value in
    >        <relation name="relation"  
    > class="ptolemy.actor.TypedIORelation">
    >            <property name="width"  
    > class="ptolemy.data.expr.Parameter" value="2"
    >            </property>
    >        </relation>
    >     of the given relation/link.
    >     Best regards
    >     Norbert
    >     On Fri, 4 May 2007, Ilkay Altintas wrote:
    >> Hi Hackers,
    >> Is there a way to send a group of data channels from a multiport to
    >> another multiport in a single relation, i.e., without having to
    >> create multiple links between them?
    >> Thanks on advance,
    >> -ilkay
    >> _______________________________________________
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    >> kepler-dev
    >           Norbert Podhorszki
    >         ------------------------------------
    >           University of California, Davis
    >           Department of Computer Science
    >           1 Shields Ave, 2236 Kemper Hall
    >           Davis, CA 95616
    >           (530) 752-5076
    >           pnorbert at cs.ucdavis.edu
    >           ----------------------------------
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    > kepler-dev
    > --------
    Ilkay ALTINTAS
    Lab Director, Scientific Workflow Automation Technologies (SWAT)
    San Diego Supercomputer Center(SDSC), UCSD
    9500 Gilman Drive, MC: 0505  La Jolla, CA  92093-0505
    phone: (858) 822-5453                        fax: (858) 534-8303
    web: http://users.sdsc.edu/~altintas

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