Hi Hao, See: http://ptolemy.eecs.berkeley.edu/ptolemyII/ptII8.0/ptII/doc/codeDoc/ptolemy/backtrack/automatic/ptolemy/actor/lib/BooleanSwitch.html
"Note that the this actor may be used in Synchronous Dataflow (SDF) models, but only under certain circumstances. Specifically, downstream actors will be fired whether a token is sent to them or not. This will only work if the downstream actors specifically check to see whether input tokens are available." Models that have branches that can change during execution are not usually SDF because the number of tokens can change during execution. SDF statically schedules the firing of tokens depending on the number of tokens produced or consumed. Try using DDF. Try searching the net and groups for BooleanSwitch, see https://kepler-project.org/users/faq#the-booleanswitch-actor-is _Christopher On 2/10/11 12:46 PM, Hao Qian wrote: > Hi, > > Under the SDF director, how to branch the workflow according to some > condition, like an ?if ? else ?? statement? There is a ?Boolean Switch? > actor, but the document says it cannot be used under SDF > director. > > Thanks! > > Hao > > > > _______________________________________________ > Kepler-users mailing list > Kepler-users at kepler-project.org > http://lists.nceas.ucsb.edu/kepler/mailman/listinfo/kepler-users -- Christopher Brooks, PMP University of California CHESS Executive Director US Mail: 337 Cory Hall Programmer/Analyst CHESS/Ptolemy/Trust Berkeley, CA 94720-1774 ph: 510.643.9841 (Office: 545Q Cory) home: (F-Tu) 707.665.0131 cell: 707.332.0670
