How can webserver's job access the model parameters and performance measures?

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Yokota T asked Jun 3, '21 Yokota T commented Jun 16, '21

How can webserver's job access the model parameters and performance measures?

Hi everyone.

I'm trying to submitting jobs to FlexSim webserver. I've succeeded in creating an instance of my model and running the simulation. But I'm having difficulty changing the values of model parameters and getting the values of the performance measures by JSON data. What should I do?

My HTML form and the result of the job are below.

<input type="hidden" name="job" value='{"modelname":"my%20model%20parameter","timeout":3600,"priority":5,"setupcommands":

[{"command":"settable=/Tools/ParameterTables/Parameters","data":"values=[\"Parameter1\", 10]"},

{"command":"setrunspeed=1000000"},{"command":"setstoptime=86400"},{"command":"toolsnodefunction=setupscript"},{"command":"run"}],

"resultcommands":[{"command":"getnodedata=/Tools/PerformanceMeasureTables/PerformanceMeasures"}]}'>

</form>

{"status":"complete","setupcommands":[{"command":"settable=/Tools/ParameterTables/Parameters","data":"values=[\"Parameter1\", 10]","verb":"GET","reply":"HTTP/1.1 404 Not Found"},{"command":"setrunspeed=1000000","data":"","verb":"GET","reply":"HTTP/1.1 200 OK"},{"command":"setstoptime=86400","data":"","verb":"GET","reply":"HTTP/1.1 200 OK"},{"command":"toolsnodefunction=setupscript","data":"","verb":"GET","reply":"HTTP/1.1 200 OK"},{"command":"run","data":"","verb":"GET","reply":"HTTP/1.1 200 OK"}],"resultcommands":[{"command":"getnodedata=/Tools/PerformanceMeasureTables/PerformanceMeasures","data":"","verb":"","reply":"{\"name\":\"PerformanceMeasures\",\"classes\":[\"PerformanceMeasureTable\"],\"superclasses\":[\"FlexSimEventHandler\"],\"behaviour\":\"behaviour\",\"spatial\":[0,0,0,1,1,1,0,0,0],\"special\":[\"\",\"VIEW:/standardviews/tools/PerformanceMeasureTable\",\"VIEW:/standardviews/tools/PerformanceMeasureTable\"],\"variable_performanceMeasures\":[[\"PerformanceMeasure1\",[1,\"reference\",\"extraData\"],\"\",\"\"]]}"}]}

Software Version:

FlexSim 21.0.6

webserver flexsimserver

my-model-parameter.fsm (136.8 KiB)

· 1

5 |100000

Attachments: Up to 12 attachments (including images) can be used with a maximum of 23.8 MiB each and 47.7 MiB total.

Jeanette F ♦♦ commented · Jun 15, 2021 at 08:09 PM

Hi @Yokota T, was Phil BoBo's answer helpful? If so, please click the red "Accept" button at the bottom of their answer. Or if you still have questions, add a comment and we'll continue the conversation.

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Answer 1 · 2021-06-11T16:37:26Z

Phil BoBo answered Jun 11, '21 Yokota T commented Jun 16, '21

You can use FlexScript to set model parameters and get performance measures.

For example:

Model.parameters["ParamName"].value = 5;

Array pfms = function_s(Model.find("Tools/PerformanceMeasureTables/1"), "getAllPFMs");
for (int i = 1; i <= pfms.length; i++) {
    string name = pfms[i].up.first.value;
    string value = pfms[i].value;
}

To execute FlexScript using a default query handler, you can use the "toolsnodefunction" query handler.

The FlexScript function you want to execute needs to be in the model before you run it. Add FlexScript functions to the model that you will execute with the "toolsnodefunction" query handler.

Attached is an example model and webpage with example code that submits a job to the webserver to open the model, set the values of the model parameters, run the model, and get the results of the performance measures.

set_param_get_perf_example.zip

The model has a "setupscript" nodefunction for setting the model parameters based on the job specification, a "processresults" nodefunction for getting the performance measures when the model is finished running, and a "modeloutput" node where it stores those values.

Values can be passed using a web form:

Results can be retrieved:

The setup script and results processing scripts are defined within the model and executed by the "toolsnodefunction" query handler.

If you want to configure FlexSim to be able to do this for any arbitrary model without any modifications to the model, then you should use the Module SDK to add query handlers to FlexSim instead of putting them in the model. Otherwise, you should configure the model itself with setup and result scripts as shown in the attached example.

· 1

5 |100000

Attachments: Up to 12 attachments (including images) can be used with a maximum of 23.8 MiB each and 47.7 MiB total.

Yokota T commented · Jun 16, 2021 at 09:16 AM

I'm sorry I didn't notice your answer immediately.

I understand. Thank you for your advice.

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