Dear Keplerites: I have been making steady progress understanding how to write actors for Kepler using the PythonScript actor. However, I have hit a stumbling block in my attempts to set input_tokenConsumptionRate.
To illustrate my problem, I have attached a simple workflow with an actor titled "IntTokenSum" written with the PythonScript actor. This actor is designed to add some number of integer tokens from it's "input" port. The number of tokens is defined by the "windowsize" port. The number of tokens to consume with each "fire" is defined with the "blocksize" port. The current version works as desired with the exception of the blocksize input prot (it always takes on the value of the windowsize input port). Q1: As the script is currently configured, the windowsize parameter works as advertised. However, I can't seem to get the blocksize parameter to work. I've tried a number of approaches to setting the input_tokenConsumptionRate per the java code for several actors (e.g., DownSample). But now I'm wondering if that is the correct approach. Perhaps its the call to self.input.get that needs to be changed. Correct output on Display2 should be the sequence: 1, 3, 5, 7, 9, 11, 13, 15, 17. Q2: I'd also like to use an actor along these lines under the SDF director with portparameters for windowsize and blocksize. But can't figure out how to to this with the PythonScript actor. Is this possible? If so, I would welcome guidance. Q3: Finally, it should be fairly easy to make this actor polymorphic. I think this can be done by changing the line: val = val + it.intValue() to val = it.add(val) But I am not sure how to initialize val to the additive identity (generalized notion of zero). -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://mercury.nceas.ucsb.edu/kepler/pipermail/kepler-users/attachments/20091123/be8b6932/attachment-0001.html> -------------- next part -------------- A non-text attachment was scrubbed... Name: windowv1.xml Type: text/xml Size: 35165 bytes Desc: not available URL: <http://mercury.nceas.ucsb.edu/kepler/pipermail/kepler-users/attachments/20091123/be8b6932/attachment-0001.xml>
