bool ExecuteSingleNode(NativeActivityContext context, FlowNode node, out FlowNode nextNode)
{
Fx.Assert(node != null, "caller should validate");
FlowStep step = node as FlowStep;
if (step != null)
{
if (this.onStepCompleted == null)
{
this.onStepCompleted = new CompletionCallback(this.OnStepCompleted);
}
return(step.Execute(context, this.onStepCompleted, out nextNode));
}
nextNode = null;
FlowDecision decision = node as FlowDecision;
if (decision != null)
{
if (this.onDecisionCompleted == null)
{
this.onDecisionCompleted = new CompletionCallback <bool>(this.OnDecisionCompleted);
}
return(decision.Execute(context, this.onDecisionCompleted));
}
IFlowSwitch switchNode = node as IFlowSwitch;
Fx.Assert(switchNode != null, "unrecognized FlowNode");
return(switchNode.Execute(context, this));
}
private void OnDecisionCompleted(NativeActivityContext context, System.Activities.ActivityInstance completedInstance, bool result)
{
FlowDecision currentNode = this.GetCurrentNode(context) as FlowDecision;
FlowNode node = result ? currentNode.True : currentNode.False;
this.ExecuteNodeChain(context, node, completedInstance);
}
private bool ExecuteSingleNode(NativeActivityContext context, FlowNode node, out FlowNode nextNode)
{
FlowStep step = node as FlowStep;
if (step != null)
{
if (this.onStepCompleted == null)
{
this.onStepCompleted = new CompletionCallback(this.OnStepCompleted);
}
return(step.Execute(context, this.onStepCompleted, out nextNode));
}
nextNode = null;
FlowDecision decision = node as FlowDecision;
if (decision != null)
{
if (this.onDecisionCompleted == null)
{
this.onDecisionCompleted = new CompletionCallback <bool>(this.OnDecisionCompleted);
}
return(decision.Execute(context, this.onDecisionCompleted));
}
IFlowSwitch switch2 = node as IFlowSwitch;
return(switch2.Execute(context, this));
}
private void OnDecisionCompleted(NativeActivityContext context, ActivityInstance completedInstance, bool result)
{
FlowDecision decision = this.GetCurrentNode(context) as FlowDecision;
Fx.Assert(decision != null, "corrupt internal state");
FlowNode next = result ? decision.True : decision.False;
this.ExecuteNodeChain(context, next, completedInstance);
}
protected override void BuildDataList()
{
BuildShapeAndTestData();
var decisionActivity = new DsfFlowDecisionActivity();
Dev2DecisionMode mode;
ScenarioContext.Current.TryGetValue("mode", out mode);
var decisionModels =
ScenarioContext.Current.Get<List<Tuple<string, enDecisionType, string, string>>>("decisionModels");
var dds = new Dev2DecisionStack { TheStack = new List<Dev2Decision>(), Mode = mode, TrueArmText = "YES", FalseArmText = "NO" };
foreach(var dm in decisionModels)
{
var dev2Decision = new Dev2Decision
{
Col1 = dm.Item1 ?? string.Empty,
EvaluationFn = dm.Item2,
Col2 = dm.Item3 ?? string.Empty,
Col3 = dm.Item4 ?? string.Empty
};
dds.AddModelItem(dev2Decision);
}
string modelData = dds.ToVBPersistableModel();
ScenarioContext.Current.Add("modelData", modelData);
decisionActivity.ExpressionText = string.Join("", GlobalConstants.InjectedDecisionHandler, "(\"", modelData,
"\",", GlobalConstants.InjectedDecisionDataListVariable, ")");
List<Tuple<string, string>> variableList;
ScenarioContext.Current.TryGetValue("variableList", out variableList);
if(variableList == null)
{
variableList = new List<Tuple<string, string>>();
ScenarioContext.Current.Add("variableList", variableList);
}
var multiAssign = new DsfMultiAssignActivity();
int row = 1;
foreach(var variable in variableList)
{
multiAssign.FieldsCollection.Add(new ActivityDTO(variable.Item1, variable.Item2, row, true));
row++;
}
FlowDecision x = new FlowDecision();
x.Condition=decisionActivity;
TestStartNode = new FlowStep
{
Action = multiAssign,
Next = x
};
ScenarioContext.Current.Add("activity", decisionActivity);
}
private static Activity CreateFlowchartWithFaults(string promoCode, int numKids)
{
Variable<string> promo = new Variable<string> { Default = promoCode };
Variable<int> numberOfKids = new Variable<int> { Default = numKids };
Variable<double> discount = new Variable<double>();
DelegateInArgument<DivideByZeroException> ex = new DelegateInArgument<DivideByZeroException>();
FlowStep discountNotApplied = new FlowStep
{
Action = new WriteLine
{
DisplayName = "WriteLine: Discount not applied",
Text = "Discount not applied"
},
Next = null
};
FlowStep discountApplied = new FlowStep
{
Action = new WriteLine
{
DisplayName = "WriteLine: Discount applied",
Text = "Discount applied "
},
Next = null
};
FlowDecision flowDecision = new FlowDecision
{
Condition = ExpressionServices.Convert<bool>((ctx) => discount.Get(ctx) > 0),
True = discountApplied,
False = discountNotApplied
};
FlowStep singleStep = new FlowStep
{
Action = new Assign
{
DisplayName = "discount = 10.0",
To = new OutArgument<double> (discount),
Value = new InArgument<double> (10.0)
},
Next = flowDecision
};
FlowStep mnkStep = new FlowStep
{
Action = new Assign
{
DisplayName = "discount = 15.0",
To = new OutArgument<double> (discount),
Value = new InArgument<double> (15.0)
},
Next = flowDecision
};
FlowStep mwkStep = new FlowStep
{
Action = new TryCatch
{
DisplayName = "Try/Catch for Divide By Zero Exception",
Try = new Assign
{
DisplayName = "discount = 15 + (1 - 1/numberOfKids)*10",
To = new OutArgument<double>(discount),
Value = new InArgument<double>((ctx) => (15 + (1 - 1 / numberOfKids.Get(ctx)) * 10))
},
Catches =
{
new Catch<System.DivideByZeroException>
{
Action = new ActivityAction<System.DivideByZeroException>
{
Argument = ex,
DisplayName = "ActivityAction - DivideByZeroException",
Handler =
new Sequence
{
DisplayName = "Divide by Zero Exception Workflow",
Activities =
{
new WriteLine()
{
DisplayName = "WriteLine: DivideByZeroException",
Text = "DivideByZeroException: Promo code is MWK - but number of kids = 0"
},
new Assign<double>
{
DisplayName = "Exception - discount = 0",
To = discount,
Value = new InArgument<double>(0)
}
}
}
}
}
}
},
Next = flowDecision
};
FlowStep discountDefault = new FlowStep
{
Action = new Assign<double>
{
DisplayName = "Default discount assignment: discount = 0",
To = discount,
Value = new InArgument<double>(0)
},
Next = flowDecision
};
FlowSwitch<string> promoCodeSwitch = new FlowSwitch<string>
{
Expression = promo,
Cases =
{
{ "Single", singleStep },
{ "MNK", mnkStep },
{ "MWK", mwkStep }
},
Default = discountDefault
};
Flowchart flowChart = new Flowchart
{
DisplayName = "Promotional Discount Calculation",
Variables = {discount, promo, numberOfKids},
StartNode = promoCodeSwitch,
Nodes =
{
promoCodeSwitch,
singleStep,
mnkStep,
mwkStep,
discountDefault,
flowDecision,
discountApplied,
discountNotApplied
}
};
return flowChart;
}
IEnumerable<IDev2Activity> ParseDecision(FlowDecision decision, List<IDev2Activity> seenActivities)
{
var activity = decision.Condition as DsfFlowDecisionActivity;
if(activity != null)
{
if( seenActivities.Contains(activity))
{
return new List<IDev2Activity> { activity};
}
var rawText = activity.ExpressionText;
// ReSharper disable MaximumChainedReferences
var activityTextjson = rawText.Substring(rawText.IndexOf("{", StringComparison.Ordinal)).Replace(@""",AmbientDataList)","").Replace("\"","!");
// ReSharper restore MaximumChainedReferences
var activityText = Dev2DecisionStack.FromVBPersitableModelToJSON(activityTextjson);
var decisionStack = JsonConvert.DeserializeObject<Dev2DecisionStack>(activityText);
var dec = new DsfDecision(activity);
if (!seenActivities.Contains(activity))
{
seenActivities.Add( dec);
}
dec.TrueArm = ParseTools(decision.True, seenActivities);
dec.FalseArm = ParseTools(decision.False, seenActivities);
dec.Conditions = decisionStack;
dec.And = decisionStack.Mode == Dev2DecisionMode.AND;
return new List<IDev2Activity>
{ dec};
}
throw new Exception("Invalid activity");
}