On Wed, Jul 16, 2008 at 5:30 AM, Edward A. Lee <eal at eecs.berkeley.edu> wrote:
> > This sounds somewhat similar to the way Case works: > > Case is multi-composite actor (it has any number of > models inside it). The models inside are presented in a > tabbed pane (I guess this is why it's not in Kepler). > It has a control input port that specifies which of > the inside models to execute. The control can be > any data type, and the inside model's name (and tab > in the tabbed pane) is simply the string representation > of the value of the control. > > IMHO: Using BooleanSwitch and BooleanSelect for control > flow is a bit like using goto in an imperative language. > It doesn't scale well... > I couldn't agree more. We've found workflows with lots of those control-flow components to be hard to digest, comprehend, evolve. Higher-order actors and related approaches seem to work much better there. Bertram > > Edward > > At 12:43 AM 7/16/2008, Bertram Ludaescher wrote: > >One more note: Soon, a number of so-called "COMAD extensions" should be > available from the Kepler repository. In this workflow design model, data > dependent routing and conditional execution can be handled differently > >(and arguably at a higher level of abstraction). > > > >The basic idea is that channels transport data collections (think: XML > data) and actors can be configured to work only on certain parts of those > data collections. > >In such a setting data dependent routing is no longer a user-concern (or > much less so; a dataflow optimizing compiler takes care of this instead). > >Similarly, conditional execution can be replaced by conditional "match > rules" of COMAD actors. > > > >We'll add some references on the underlying model to the kepler web site. > The Kepler COMAD extensions should become available over the next couple of > weeks as well (COMAD gurus, correct me if I'm wrong ;-) > > > >Bertram > > > >On Tue, Jul 15, 2008 at 12:47 PM, Dan Higgins <<mailto: > higgins at nceas.ucsb.edu>higgins at nceas.ucsb.edu> wrote: > >Unless someone has made some changes in the past few months, the Case > actor does not work in Kepler due to changes Kepler has made in the way the > workflow GUI is displayed (related to the actor and search widgets on the > left?) > > > >I agree - the Case actor should appear in Kepler!!! If there is not a bug > about it, someone should add one. > > > >Dan Higgins > > > >===== > > > > > >Edward A. Lee wrote: > >How about using the Case actor? It can be used with SDF. > >It's in the Ptolemy library under "Higher-Order Components". > >Not sure where (whether) it's in Kepler... If it isn't, it > >should be... It should also be highlighted on the "how to" > >web page... > > > >Edward > > > > > >At 10:28 AM 7/14/2008, Josep Maria Campanera Alsina wrote: > > > >Dear All, > >I'd like to pick some ideas from audience: > > > >I'd like to branch my workflow! Actually I'd like to be able to decide to > run some parts of my workflow while keep some others off! How can I do that > in the SDF paradigm? I thought to use some actors from "Workflow control" > and "Boolean control"? > >For instance If I set up a parameter (YES/NO) and according to that, some > parts of the workflow can execute (YES) and some have not (NO). How to do > that? > > > >Thanks a lot, > > > >Campa, > >_______________________________________________ > >Kepler-users mailing list > ><mailto:Kepler-users at ecoinformatics.org>Kepler-users at ecoinformatics.org > > > http://mercury.nceas.ucsb.edu/ecoinformatics/mailman/listinfo/kepler-users > > > > > > > >------------ Edward A. Lee > >Robert S. Pepper Distinguished Professor > >EECS Dept., 545Q Cory Hall, UC Berkeley, Berkeley, CA 94720-1770 > >phone: 510-642-0253, fax: 510-642-2845 > ><mailto:eal at eecs.Berkeley.EDU>eal at eecs.Berkeley.EDU, > http://www.eecs.berkeley.edu/Faculty/Homepages/lee.html > >_______________________________________________ > >Kepler-users mailing list > ><mailto:Kepler-users at ecoinformatics.org>Kepler-users at ecoinformatics.org > > > http://mercury.nceas.ucsb.edu/ecoinformatics/mailman/listinfo/kepler-users > > > > > > > > > >_______________________________________________ > >Kepler-users mailing list > ><mailto:Kepler-users at ecoinformatics.org>Kepler-users at ecoinformatics.org > > > http://mercury.nceas.ucsb.edu/ecoinformatics/mailman/listinfo/kepler-users > > > > ------------ > Edward A. Lee > Robert S. Pepper Distinguished Professor > EECS Dept., 545Q Cory Hall, UC Berkeley, Berkeley, CA 94720-1770 > phone: 510-642-0253, fax: 510-642-2845 > eal at eecs.Berkeley.EDU, > http://www.eecs.berkeley.edu/Faculty/Homepages/lee.html > > -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://mercury.nceas.ucsb.edu/ecoinformatics/pipermail/kepler-users/attachments/20080717/164897f9/attachment.html>
