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#region Using directives
using System;
using System.Collections;
using System.Collections.Generic;
using System.Collections.Specialized;
using System.Reflection;
using System.Diagnostics;
using System.Runtime.Remoting.Messaging;
using System.Workflow.ComponentModel;
using System.Workflow.ComponentModel.Design;
using System.Workflow.Runtime;
using System.Workflow.Runtime.Hosting;
#endregion Using directives
namespace System.Workflow.Activities
{
[Serializable]
internal class StateMachineAction
{
private string _stateName;
[NonSerialized]
private StateActivity _state;
[NonSerialized]
private StateActivity _currentState;
private StateMachineExecutionState _executionState;
private StateMachineSubscriptionManager _subscriptionManager;
internal string StateName
{
get
{
return _stateName;
}
}
protected StateActivity State
{
get
{
return _state;
}
}
protected StateActivity CurrentState
{
get
{
return _currentState;
}
}
protected StateMachineExecutionState ExecutionState
{
get
{
return _executionState;
}
}
protected StateMachineSubscriptionManager SubscriptionManager
{
get
{
return _subscriptionManager;
}
}
internal StateMachineAction(string stateName)
{
_stateName = stateName;
}
internal virtual void Execute(ActivityExecutionContext context)
{
if (context == null)
throw new ArgumentNullException("context");
Debug.Assert(context.Activity.QualifiedName.Equals(this.StateName));
_state = (StateActivity)context.Activity;
_currentState = StateMachineHelpers.GetCurrentState(context);
StateActivity rootState = StateMachineHelpers.GetRootState(_state);
_executionState = StateMachineExecutionState.Get(rootState);
_subscriptionManager = _executionState.SubscriptionManager;
}
}
[Serializable]
internal class CloseStateAction : StateMachineAction
{
internal CloseStateAction(string stateName)
: base(stateName)
{
}
internal override void Execute(ActivityExecutionContext context)
{
base.Execute(context);
StateActivity.LeavingState(context);
}
}
[Serializable]
internal class ExecuteChildStateAction : StateMachineAction
{
private string _childStateName;
internal ExecuteChildStateAction(string stateName, string childStateName)
: base(stateName)
{
_childStateName = childStateName;
}
internal string ChildStateName
{
get
{
return _childStateName;
}
}
internal override void Execute(ActivityExecutionContext context)
{
base.Execute(context);
StateActivity childState = (StateActivity)this.State.Activities[this.ChildStateName];
Debug.Assert(childState.Enabled);
StateActivity.ExecuteState(context, childState);
}
}
[Serializable]
internal class SubscribeAction : StateMachineAction
{
private string _eventDrivenName;
internal SubscribeAction(string stateName, string eventDrivenName)
: base(stateName)
{
_eventDrivenName = eventDrivenName;
}
internal string EventDrivenName
{
get
{
return _eventDrivenName;
}
}
internal override void Execute(ActivityExecutionContext context)
{
base.Execute(context);
EventDrivenActivity eventDriven = (EventDrivenActivity)this.State.Activities[this.EventDrivenName];
Debug.Assert(eventDriven.Enabled);
this.SubscriptionManager.SubscribeEventDriven(context, eventDriven);
}
}
[Serializable]
internal class UnsubscribeAction : StateMachineAction
{
private string _eventDrivenName;
internal UnsubscribeAction(string stateName, string eventDrivenName)
: base(stateName)
{
_eventDrivenName = eventDrivenName;
}
internal string EventDrivenName
{
get
{
return _eventDrivenName;
}
}
internal override void Execute(ActivityExecutionContext context)
{
base.Execute(context);
EventDrivenActivity eventDriven = (EventDrivenActivity)this.State.Activities[this.EventDrivenName];
Debug.Assert(eventDriven.Enabled);
this.SubscriptionManager.UnsubscribeEventDriven(context, eventDriven);
}
}
[Serializable]
internal class ExternalEventAction : StateMachineAction
{
private string _eventDrivenName;
internal ExternalEventAction(string stateName, string eventDrivenName)
: base(stateName)
{
_eventDrivenName = eventDrivenName;
}
internal string EventDrivenName
{
get
{
return _eventDrivenName;
}
}
internal override void Execute(ActivityExecutionContext context)
{
base.Execute(context);
EventDrivenActivity eventDriven = (EventDrivenActivity)this.State.Activities[this.EventDrivenName];
Debug.Assert(eventDriven.Enabled);
StateActivity.ExecuteEventDriven(context, eventDriven);
}
}
[Serializable]
internal class SetStateAction : StateMachineAction
{
private string _targetStateName;
internal SetStateAction(string stateName, string targetStateName)
: base(stateName)
{
_targetStateName = targetStateName;
}
internal string TargetStateName
{
get
{
return _targetStateName;
}
}
internal override void Execute(ActivityExecutionContext context)
{
base.Execute(context);
this.ExecutionState.CalculateStateTransition(this.CurrentState, this.TargetStateName);
}
}
[Serializable]
internal class DisableQueuesAction : StateMachineAction
{
internal DisableQueuesAction(string stateName)
: base(stateName)
{
}
internal override void Execute(ActivityExecutionContext context)
{
base.Execute(context);
StateActivity state = this.State;
StateActivity rootState = StateMachineHelpers.GetRootState(state);
Queue<StateActivity> states = new Queue<StateActivity>();
states.Enqueue(rootState);
while (states.Count > 0)
{
state = states.Dequeue();
foreach (Activity activity in state.EnabledActivities)
{
EventDrivenActivity eventDriven = activity as EventDrivenActivity;
if (eventDriven != null)
{
IEventActivity eventActivity = StateMachineHelpers.GetEventActivity(eventDriven);
IComparable queueName = eventActivity.QueueName;
if (queueName != null)
{
WorkflowQueue queue = StateMachineSubscriptionManager.GetWorkflowQueue(context, queueName);
if (queue != null)
queue.Enabled = this.SubscriptionManager.Subscriptions.ContainsKey(queueName);
}
}
else
{
StateActivity childState = activity as StateActivity;
if (childState != null)
states.Enqueue(childState);
}
}
}
}
}
[Serializable]
internal class EnteringStateAction : StateMachineAction
{
internal EnteringStateAction(string stateName)
: base(stateName)
{
}
internal override void Execute(ActivityExecutionContext context)
{
base.Execute(context);
context.TrackData(StateActivity.StateChangeTrackingDataKey, this.CurrentState.QualifiedName);
}
}
}
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