private void RefreshCurrentVariables()
{
try
{
Logger.Debug("Refreshing current variables and their values.");
WatchVariables = TclUtils.GetVariableValues(_interpreter, true);
}
catch (Exception e)
{
Logger.Error(e, "Error while refreshing current variables.");
}
}
private ReturnCode ExecuteDefine(Interpreter interpreter, ArgumentList arguments,
ref Result result)
{
var fsmArray = arguments[2];
var initialState = arguments[3];
InternalLogger.Info($"Defining FSM with array {fsmArray} to initial state {initialState}");
if (!TclUtils.ArrayExists(interpreter, fsmArray))
{
var fsmTransArrayError = $"Array of fsm states with name: {fsmArray} does not exist (is not defined).";
ErrorLogger.Error(fsmTransArrayError);
result = fsmTransArrayError;
return(ReturnCode.Error);
}
InternalLogger.Debug($"Retrieving all FSM transitions from {fsmArray} FSM array.");
IReadOnlyList <FsmTransition> fsmTransitions;
if (!FsmUtils.TryGetFsmTransitions(interpreter, fsmArray, out fsmTransitions))
{
var transitionsFailed = $"Failed to retrieve FSM transition from {fsmArray} array.";
ErrorLogger.Error(transitionsFailed);
result = transitionsFailed;
return(ReturnCode.Error);
}
InternalLogger.Info($"Assigning all {fsmTransitions.Count} into internal transitions set.");
_transitions.Clear();
foreach (var fsmTransition in fsmTransitions)
{
InternalLogger.Debug($"Adding FSM transition: {fsmTransition}");
_transitions.Add(fsmTransition);
}
InternalLogger.Info($"Checking whether {initialState} state is defined in transition set.");
if (!ContainsState(initialState))
{
var stateNotFound = $"State {initialState} was not found in defined transitions. Known states are:\n{string.Join(",", DumpStates())}";
ErrorLogger.Error(stateNotFound);
result = stateNotFound;
return(ReturnCode.Error);
}
CurrentState = initialState;
ResultLogger.Info($"FSM successfully defined to initial state: {initialState}");
return(ReturnCode.Ok);
}
private string InsertBreakpoints(string text)
{
var sb = new StringBuilder(text.Length * 2);
int lineNumber = 1;
foreach (string line in new LineReader(() => new StringReader(text)))
{
if (!String.IsNullOrWhiteSpace(line) && !TclUtils.IsCommentLine(line))
{
sb.AppendLine(CreateBeakpointText(lineNumber));
}
sb.AppendLine(line);
lineNumber++;
}
return(sb.ToString());
}
private ReturnCode ExecuteRaiseEvent(Interpreter interpreter, ArgumentList arguments, ref Result result)
{
var raisedEvent = arguments[2];
InternalLogger.Info($"Executing {raisedEvent} event.");
if (!CiscoTclEvents.All.Contains(raisedEvent.String))
{
var unknownEvent = $"Event {raisedEvent} is not valid Cisco TCL event.\nValid CiscoTcl events are: [{string.Join(", ", CiscoTclEvents.All)}]";
ErrorLogger.Error(unknownEvent);
result = unknownEvent;
return(ReturnCode.Error);
}
var transition = DetermineCurrentTransition(raisedEvent);
if (transition == null)
{
var transitionNotDefined = $"Transition for event {raisedEvent} is not defined in FSM.";
ErrorLogger.Warn(transitionNotDefined);
result = transitionNotDefined;
//transition is not defined, but it's not an error, just don't perform any transitions
return(ReturnCode.Ok);
}
InternalLogger.Info($"Found transition for event {raisedEvent} is {transition}.");
if (!TclUtils.ProcedureExists(interpreter, transition.Procedure))
{
var procedureNotExists = $"Procedure {transition.Procedure} which is defined in transition {transition} does not exist.";
ErrorLogger.Error(procedureNotExists);
result = procedureNotExists;
return(ReturnCode.Error);
}
var code = interpreter.EvaluateScript($"{transition.Procedure}", ref result);
if (code != ReturnCode.Ok)
{
var error = $"Error occured while executing procedure {transition.Procedure}. Error: {result.String}";
ErrorLogger.Error(error);
result = error;
return(ReturnCode.Error);
}
var nextStateToSet = DetermineNextState(transition);
if (!ContainsState(nextStateToSet))
{
var notDefinedState = $"Target state {nextStateToSet} defined in transition is not defined in FSM transitions.";
ErrorLogger.Error(notDefinedState);
result = notDefinedState;
return(ReturnCode.Error);
}
CurrentState = nextStateToSet;
//unset overridden state no matter if it was or was not used
_overriddenNextState = string.Empty;
ResultLogger.Info($"Successfully raised {raisedEvent} and set FSM to state {nextStateToSet}");
return(ReturnCode.Ok);
}
