Catch events when an object starts calculating

[AlbertoB]

Dear all

I am programming a series of functions which they need to be linked to the start of the calculation of each specific object. I know I can do it through the script manager and that works great. The problem comes when I have over 50 objects. I don't want to have 50 scripts each one linked to their own object.

Is there a way I can catch the calculationStarted event so I can run an specific function? I went through the code and apparently there is no event creation it is just a direct call to the ProcessScripts function which looks for the script linked to that object and runs it.

I guess my options are:
1. Program my own sequential solver routine
2. Automate the creation of pythonscripts each of them linked to an object and with a callback to an specific function on a global script.

What are your thoughts?

[Daniel Medeiros]

Can't you use the Solver Started event?

[AlbertoB]

Sure, the problem is that I do not know which object is being calculated. Ideally would be to have an event which tells that a new calculation in an object started and which object is being calculated. In that way I can have a single function which is getting that info and doing something instead of having a script link to an event for every object in my flow sheet.

[AlbertoB]

Solution UPDATE:

Going through all object contained inside a flowsheet using a for loop. For each object generate a IScript dictionary as follows:

import clr
import System
import uuid
clr.AddReference("DWSIM.Interfaces")
from System.Collections.Generic import List, Dictionary
import DWSIM.Interfaces

def createScript(obj_name):
    #GUID = str(uuid.uuid1())
    GUID = obj_name
    Flowsheet.ScriptCollection.Add(GUID, DWSIM.FlowsheetSolver.Script())
    #By not declaring the ID the tabs of each script is not loaded
    #Flowsheet.ScriptCollection.TryGetValue(GUID)[1].ID = GUID
    Flowsheet.ScriptCollection.TryGetValue(GUID)[1].Linked = True
    Flowsheet.ScriptCollection.TryGetValue(GUID)[1].LinkedEventType = DWSIM.Interfaces.Enums.Scripts.EventType.ObjectCalculationStarted
    Flowsheet.ScriptCollection.TryGetValue(GUID)[1].LinkedObjectName = obj_name
    Flowsheet.ScriptCollection.TryGetValue(GUID)[1].LinkedObjectType = DWSIM.Interfaces.Enums.Scripts.ObjectType.FlowsheetObject
    Flowsheet.ScriptCollection.TryGetValue(GUID)[1].PythonInterpreter = DWSIM.Interfaces.Enums.Scripts.Interpreter.IronPython
    Flowsheet.ScriptCollection.TryGetValue(GUID)[1].Title = obj_name
    Flowsheet.ScriptCollection.TryGetValue(GUID)[1].ScriptText = str("Whatever code of Python you want")

Once the scripts are generated you need to restart DWSIM to get the tabs if you added a unique ID.

[Ella Daiki]

Hello,
tank you for sharing the code, it was a big help!!
However, I do not know how to access the flowsheet that I have previously loaded into DWSIM via python as well. In order to then define, for example, the temperature of the material flows and the outlet temperature of the reactor.
I tried something like the this:

# create new flowsheet
interf = Automation()
sim = interf.CreateFlowsheet()

# define Script Manager
# [...] as in the post above 

    sim.Scripts.TryGetValue(GUID)[1].ScriptText = str('MyReaction\n'
                                                      '\n import math\n'
                                                     '\n obj = sim.GetFlowsheetSimulationObject(pfr)'
                                                     # pfr was defined bevor as well as input and output
                                                      '\n obj.set_OutletTemperature(300.0)')

createScript('MyReaction')

But I must have missed something, cause this dosen't work.
Thanks in advance! :)