public void DeviceCommandHandler(object sender, StateMachineEventArgs args)
{
// Listen to command events only
if (args.EventType != StateMachineEventType.Command)
{
return;
}
// Get device and execute command action method
try
{
if (!this.DeviceList.Keys.Contains(args.Target))
{
return;
}
// Convention device commands and method names must match!
var device = this.DeviceList[args.Target];
MethodInfo deviceMethod = device.GetType().GetMethod(args.EventName);
deviceMethod.Invoke(device, new object[] { });
this.RaiseDeviceManagerEvent("DeviceCommand", "Successful device command: " + args.Target + " - " + args.EventInfo);
}
catch (Exception ex)
{
this.RaiseDeviceManagerEvent("DeviceCommand - Error", ex.ToString());
throw;
}
}
public void RaiseDeviceManagerNotification(string command, string info, string source)
{
var devManagerNotification = this.DeviceManagerNotification;
if (devManagerNotification != null)
{
var newDMArgs = new StateMachineEventArgs(command, info, StateMachineEventType.Notification, source, "State Machine");
devManagerNotification(this, newDMArgs);
}
}
private void RaiseDeviceEvent(string target, string command)
{
var devEvent = this.TelephoneDeviceEvent;
if (devEvent != null)
{
var telArgs = new StateMachineEventArgs(command, "Device command", StateMachineEventType.Command, "State machine action", target);
devEvent(this, telArgs);
}
}
private void RaiseEventManagerEvent(string eventName, string eventInfo, StateMachineEventType eventType)
{
var evtMgrEvt = this.EventManagerEvent;
if (evtMgrEvt != null)
{
var newArgs = new StateMachineEventArgs(eventName, eventInfo, eventType, "Event Manager");
evtMgrEvt(this, newArgs);
}
}
public void SystemEventHandler(object sender, StateMachineEventArgs args)
{
// Initialize
if (args.EventName == "OnInit")
{
this._UI.LoadViewState(this.DefaultViewState);
this.CurrentView = this.DefaultViewState;
}
// Catastrophic error handling
if (args.EventName == "CompleteFailure")
{
this._UI.LoadViewState("CompleteFailure");
}
}
/// <summary>
/// Log infos to dubug window
/// </summary>
/// <param name="sender">"sender"</param>
/// <param name="args">"args"</param>
public void LogEventHandler(object sender, StateMachineEventArgs args)
{
// Log system events
if (args.EventType != StateMachineEventType.Notification)
{
Debug.Print(args.TimeStamp +
" SystemEvent: " + args.EventName +
" - Info: " + args.EventInfo +
" - StateMachineArgumentType: " + args.EventType +
" - Source: " + args.Source +
" - Target: " + args.Target); ;
}
else
{
// Log state machine notifications
Debug.Print(args.TimeStamp +
" Notification: " + args.EventName +
" - Info: " + args.EventInfo +
" - StateMachineArgumentType: " + args.EventType +
" - Source: " + args.Source +
" - Target: " + args.Target); ;
}
}
public void ViewCommandHandler(object sender, StateMachineEventArgs args)
{
// This approach assumes that there is a dedicated view state for every state machine UI command
try
{
if (this.viewStates.Contains(args.EventName))
{
// Convention: view command event names matches corresponding view state
this._UI.LoadViewState(args.EventName);
this.CurrentView = args.EventName;
this.RaiseViewManagerEvent("View Manager Command", "Successfully loaded viewStates state: " + args.EventName);
}
else
{
this.RaiseViewManagerEvent("View Manager Command", "View state not found!");
}
}
catch (Exception ex)
{
this.RaiseViewManagerEvent("View Manager Command - Error", ex.ToString());
}
}
/// <summary>
/// Handler method for special system evnts, e.g. initialization
/// </summary>
/// <param name="sender">sender</param>
/// <param name="args">args</param>
public void SystemEventHandler(object sender, StateMachineEventArgs args)
{
// Initialize
if (args.EventName == "OnInit" && args.EventType == StateMachineEventType.Command)
{
foreach (var dev in this.DeviceList)
{
try
{
MethodInfo initMethod = dev.Value.GetType().GetMethod("OnInit");
initMethod.Invoke(dev.Value, new object[] { });
this.RaiseDeviceManagerEvent("DeviceCommand - Initialization device", dev.Key);
}
catch (Exception ex)
{
this.RaiseDeviceManagerEvent("DeviceCommand - Initialization error device" + dev.Key, ex.ToString());
}
}
}
// Notification Handler
// because we use UI to trigger transitions devices would trigger normally themselves.
// Nevertheless, this is common, if SW user interfaces control devices
// View and device managers communicate on system event bus and use notifications to trigger state machine
if (args.EventType == StateMachineEventType.Command)
{
// check for right condition
if (args.EventName == "OnInit") return;
if (!this.DeviceList.ContainsKey(args.Target)) return;
//Dispatch commmand to device
this.DeviceCommandHandler(this, args);
//this.RaiseDeviceManagerNotification(args.EventName, "routed through device manager: " + args.EventInfo, args.Source);
}
}
private void RaiseDeviceManagerEvent(string name, string info)
{
var devManagerEvent = this.DeviceManagerEvent;
if (devManagerEvent != null)
{
var newDMArgs = new StateMachineEventArgs(name, "Device manager event: " + info, StateMachineEventType.System, "Device Manager");
devManagerEvent(this, newDMArgs);
}
}
public void InternalNotificationHandler(object sender, StateMachineEventArgs intArgs)
{
// Catastrophic error
if (intArgs.EventName == "CompleteFailure")
{
this.RaiseStateMachineSystemCommand("CompleteFailure", intArgs.EventInfo + " Device : " + intArgs.Source);
// stop state machine to avoid any damage
this.Stop();
}
// Normal operation
else
{
this.EnterTrigger(intArgs.EventName);
}
}
/// <summary>
/// Method to raise a view manager event for logging, etc.
/// </summary>
/// <param name="name">"name"</param>
/// <param name="info">"info"</param>
/// <param name="eventType">"eventType"</param>
private void RaiseViewManagerEvent(string name, string info, StateMachineEventType eventType = StateMachineEventType.System)
{
var vmEventHandler = this.ViewManagerEvent;
if (vmEventHandler != null)
{
var newVMargs = new StateMachineEventArgs(name, "View manager event: " + info, eventType, "View manager");
vmEventHandler(this, newVMargs);
}
}
/// <summary>
/// Sends a command to
/// </summary>
/// <param name="command"></param>
/// <param name="info"></param>
/// <param name="source"></param>
/// <param name="target"></param>
public void RaiseUICommand(string command, string info, string source, string target)
{
var uiNotificationEvent = this.UINotification;
if (uiNotificationEvent != null)
{
var newUIargs = new StateMachineEventArgs(command, info, StateMachineEventType.Command, source, target);
uiNotificationEvent(this, newUIargs);
}
}
/// <summary>
/// Helper to raise the telphone UI event
/// </summary>
/// <param name="command"></param>
private void RaiseTelephoneUiEvent(string command)
{
var uiEvent = this.TelephoneUiEvent;
if (uiEvent != null)
{
var telArgs = new StateMachineEventArgs(command, "UI command", StateMachineEventType.Command, "State machine action", "View Manager");
uiEvent(this, telArgs);
}
}