// Permission is hereby granted, free of charge, to any person obtaining
// a copy of this software and associated documentation files (the
// "Software"), to deal in the Software without restriction, including
// without limitation the rights to use, copy, modify, merge, publish,
// distribute, sublicense, and/or sell copies of the Software, and to
// permit persons to whom the Software is furnished to do so, subject to
// the following conditions:
//
// The above copyright notice and this permission notice shall be
// included in all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
//
// Authors:
//
// Copyright (C) 2006 Jordi Mas i Hernandez <jordimash@gmail.com>
//
using System;
using System.ComponentModel;
using System.Threading;
using System.Workflow.ComponentModel;
namespace System.Workflow.Activities{
public sealed class DelayActivity : Activity
//IEventActivity, IActivityEventListener<QueueEventArgs>
{
static public readonly DependencyProperty InitializeTimeoutDurationEvent;
static public readonly DependencyProperty TimeoutDurationProperty;
static private AutoResetEvent reset_event = new AutoResetEvent (false);
private TimeSpan timeout;
private bool delayed = false;
public DelayActivity ()
{
}
public DelayActivity (string name) : base (name)
{
}
// Event
public event EventHandler InitializeTimeoutDuration;
// Properties
public TimeSpan TimeoutDuration {
get {return timeout;}
set {timeout = value;}
}
// Private Properties
static public AutoResetEvent WaitEvent {
get {return reset_event;}
}
public bool Delayed {
get {
return delayed;
}
}
// Methods
//protected override ActivityExecutionStatus Cancel(ActivityExecutionContext executionContext);
protected override ActivityExecutionStatus Execute (ActivityExecutionContext executionContext)
{
DateTime expiresAt = DateTime.UtcNow;
if (InitializeTimeoutDuration != null) {
InitializeTimeoutDuration (this, new EventArgs ());
}
expiresAt += TimeoutDuration;
delayed = true;
SetTimer (executionContext, expiresAt);
NeedsExecution = false;
return ActivityExecutionStatus.Executing;
}
protected override void OnQueueTimerItemArrived (Object sender, object args)
{
delayed = false;
//Console.WriteLine ("Timer arrived!");
reset_event.Set ();
}
//protected sealed override ActivityExecutionStatus HandleFault (ActivityExecutionContext executionContext, Exception exception)
//protected override void Initialize (IServiceProvider provider)
//protected override void OnClosed(IServiceProvider provider);
}
}
|