[kepler-users] Understanding Kepler at Java Level

[Josep Morer Muñoz]

Thanks Christopher, it is very useful.

2010/5/20 Christopher Brooks <cxh at eecs.berkeley.edu>

> Hi Josep,
> The best way to add a parameter at runtime is to
> execute a MoMLChangeRequest.  See page 237 of
> http://www.eecs.berkeley.edu/Pubs/TechRpts/2008/EECS-2008-28.html
>
> Below is a small example that parses an xml file, adds a parameter and
> exports
> the resulting model.
>
> bash-3.2$ cat AddParameter.java
> import ptolemy.moml.MoMLChangeRequest;
> import ptolemy.moml.MoMLParser;
> import ptolemy.actor.TypedCompositeActor;
> public class AddParameter {
>    public static void main(String [] args) throws Exception {
>        // See ptolemy.moml.MoMLSimpleApplication for complete details
>        MoMLParser parser = new MoMLParser();
>        TypedCompositeActor toplevel = (TypedCompositeActor)
> parser.parseFile(args[0]);
>        MoMLChangeRequest change = new MoMLChangeRequest(null, toplevel,
>                "<property name=\"myProperty\"
> class=\"ptolemy.data.expr.Parameter\" value=\"myValue\"/>");
>        change.execute();
>        System.out.println(toplevel.exportMoML());
>    }
> }bash-3.2$ javac -classpath $PTII AddParameter.java
> bash-3.2$ java -classpath $PTII AddParameter
> ~/src/kepler/ptolemy/src/ptolemy/moml/demo/test.xml
> <?xml version="1.0" standalone="no"?>
> <!DOCTYPE entity PUBLIC "-//UC Berkeley//DTD MoML 1//EN"
>    "http://ptolemy.eecs.berkeley.edu/xml/dtd/MoML_1.dtd">
> <entity name="test" class="ptolemy.actor.TypedCompositeActor">
>    <property name="_createdBy"
> class="ptolemy.kernel.attributes.VersionAttribute" value="8.1.devel">
>    </property>
>    <property name="director"
> class="ptolemy.domains.sdf.kernel.SDFDirector">
>    </property>
>    <property name="myProperty" class="ptolemy.data.expr.Parameter"
> value="myValue">
>    </property>
>    <entity name="ramp" class="ptolemy.actor.lib.Ramp">
>    </entity>
>    <entity name="plot" class="ptolemy.actor.lib.gui.SequencePlotter">
>        <property name="_windowProperties"
> class="ptolemy.actor.gui.WindowPropertiesAttribute">
>        </property>
>        <property name="_plotSize" class="ptolemy.actor.gui.SizeAttribute">
>        </property>
>    </entity>
>    <relation name="r" class="ptolemy.actor.TypedIORelation">
>    </relation>
>    <link port="ramp.output" relation="r"/>
>    <link port="plot.input" relation="r"/>
> </entity>
>
> bash-3.2$
>
> _Christopher
>
>
> On 5/20/10 9:42 AM, ben leinfelder wrote:
>
>> The webservice code is in the webservice module
>> http://code.kepler-project.org/code/kepler/trunk/modules/webservice/
>> I'm not sure exactly which class it is that does all the work, but there's
>> a good introduction/help file in the module.
>> -ben
>>
>> On May 20, 2010, at 8:56 AM, Josep Morer Muñoz wrote:
>>
>>  Yes, I am executing using command line inside Java but I want
>>> independency between my application and the operating system where Kepler is
>>> running.
>>>
>>> Thanks Ben, sounds interesting. Where can I find this workflow execution
>>> web service for looking into it? I assume that it allow to set a parameter
>>> value different than workflow default ones (as
>>> command line execution).
>>>
>>>
>>>
>>> 2010/5/20 ben leinfelder <leinfelder at nceas.ucsb.edu>
>>> Josep -
>>> I believe you can accomplish your first goal by invoking the "command
>>> line" as an external process from your Java code. The workflow execution web
>>> service that Jing Tao helped develop essentially
>>> does exactly what you are aiming to do: load a KAR, execute the workflow
>>> in it, get the result KAR when execution finishes.
>>> For your second request, you'd probably have to dig much deeper into the
>>> Kepler/ptolemy code to add a parameter to the MOML after it was loaded.
>>> Perhaps the folks more familiar with ptolemy can
>>> point you in a good direction.
>>> -ben
>>>
>>>
>>> On May 20, 2010, at 3:16 AM, Josep Morer Muñoz wrote:
>>>
>>> Hi all,
>>>
>>> I want know Kepler at Java Level to execute it inside a java program. I
>>> have build all jar to use them into a java application. It will be useful if
>>> someone give me an overview (just say me which
>>> java classes that I should take a look) for using Kepler at Java code
>>> level. Can you give me some orientation about:
>>>
>>> - Given a KAR Path, extract and execute the workflow and get result KAR
>>> as the same way as command line (or clicking Play Button in the GUI). It
>>> will be useful, I can change the input parameters
>>> value using java code before execute it. Which classes have I take a
>>> look?
>>> - Add an input parameter to the workflow when the model is loaded into
>>> the memory. In other words, add a new parameter which is not previously in
>>> the workflow XML.
>>>
>>> Congratulations for your work and thanks for your help.
>>>
>>> --
>>> Josep
>>> _______________________________________________
>>> Kepler-users mailing list
>>> Kepler-users at kepler-project.org
>>> http://mercury.nceas.ucsb.edu/kepler/mailman/listinfo/kepler-users
>>>
>>>
>>>
>>>
>>> --
>>> Josep
>>>
>>
>> _______________________________________________
>> Kepler-users mailing list
>> Kepler-users at kepler-project.org
>> http://mercury.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 fax:510.642.2718             (Office: 545Q Cory)
> home: (F-Tu) 707.665.0131 cell: 707.332.0670
>



-- 
Josep
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