[kepler-users] [kepler-dev] command line kepler , server side

[Efrat Frank]

Hi Lance,

Under src/org/geon there is a class called WorkflowExecute. You can 
deploy it as a web service (or just call it from a jsp page). The 
execute method accepts a workflow URL and a java.util.Map of inputs.

For the deployment you'd need to have the kepler.jar and 
kepler-config.jar and all other required jars on the remote machine. 
You'd also need to make the remote site java.awt headless, in order to 
allow execution of swing components on the server side.

I was using this class from a web form therefore all of the inputs are 
strings, but the setInputs method can easily be modified to accept other 
types (there are translations in the code for various formats). For the 
same reason, this class returns only a single output (that is redirected 
back to a web page), but you can modify this as well. The output token 
can be of any type, and I translate it and return its string representation.

The required changes in the workflow to be able to execute on the server 
side are as follows:
- For each required input, you'd need to create a workflow parameter 
(String parameter, in case of using web forms). In the inputs map, you'd 
be setting these parameter values, where the key names are the same as 
the workflow parameters.

- For the output, You'd need to create a workflow parameter called 
'output' and use the SetVariable actor to set its value.

In the attached images you can see the workflow input parameters (which 
are used within the actors, by configuring them, i.e. double clicking). 
This workflow originally displays its output on a browser window, thus 
the BrowserDisplay actor is replaced with a setVariable which sets the 
output variable to the URL to be displayed.

Hope this helps, please let me know if you have any questions,

Efrat

Lance De Vine wrote:

>Dear Kepler users/developers,
>
>Was wondering if anyone could direct me to some information about 
>executing Kepler workflows via the commandline without the GUI.
>
>I would also be interested in getting Kepler to run server-side.
>
>Any help would be appreciated.
>
>  
>
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