How to read nodes with the DATATYPE_SIMPLE

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martin.j asked Oct 14 2016 at 10:20 AM jing.c commented Oct 18 2016 at 1:33 AM

How to read nodes with the DATATYPE_SIMPLE

I am attempting to read statistics information form a process flow activity. see image below

In the stats/instances/[instance] I find a number of nodes with DATATYPE_SIMPLE that contain statistics data for the activity. Using getnodenum(node) I can read the Input and Output nodes, but the tokens node contains the information seen above, and a getnodenum() call returns only 0.

Is there a way to read this information, to get the Size: value for instance? I am not only interested in this specific situation but more generally on how to acces the DATATYPE_SIMPLE. I see it used several places throughout Flexsim, but so far much of it is inaccessible.

Software Version:

FlexSim 16.2.0

statistics datatype getnodenum read simple data

datatype-simple.png (10.4 KiB)

Answer 1 · 2016-10-14T12:35:03Z

Matt Long answered Oct 14 2016 at 12:35 PM jing.c commented Oct 18 2016 at 1:33 AM

Generally we would recommend not reading data directly from these nodes as their structure and naming could change, breaking old models. For gathering statistics, you should use the getstat() command.

However, there are two commands that can be used to get and set data on a SimpleDataType (SDT).

getsdtvalue(sdtNode, "valName");
setsdtvalue(sdtNode, "valName", value);

· 3

martin.j commented · Oct 17 2016 at 7:58 AM

So based on the above example, the code should be:

getsdtvalue(sdtNode,"Size"); 
or getsdtvalue(sdtNode,"Size:");

I have tried It - it doesn't work it always returns 0.

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Matt Long martin.j commented · Oct 17 2016 at 3:20 PM

Yes, looks like nothing is accessible in that SDT node. As stated before, you should use the getstat() command which would look like this:

treenode activity = getactivity("FixedResource", "ActivityName");
getstat(activity, "Content", STAT_CURRENT, current);

Where current is the instance owner object, which in your case is Line 2 - RWA.

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jing.c martin.j commented · Oct 18 2016 at 1:33 AM

Hi Martin, this answer may help you ☺How to get RN data?

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