87 lines
2.8 KiB
C#
87 lines
2.8 KiB
C#
//------------------------------------------------------------
|
|
// Copyright (c) Microsoft Corporation. All rights reserved.
|
|
//------------------------------------------------------------
|
|
|
|
namespace System.Activities.Tracking
|
|
{
|
|
using System;
|
|
using System.Runtime;
|
|
|
|
public abstract class TrackingParticipant
|
|
{
|
|
protected TrackingParticipant()
|
|
{
|
|
}
|
|
|
|
public virtual TrackingProfile TrackingProfile
|
|
{
|
|
get;
|
|
set;
|
|
}
|
|
|
|
[Fx.Tag.InheritThrows(From = "Track", FromDeclaringType = typeof(TrackingParticipant))]
|
|
protected internal virtual IAsyncResult BeginTrack(TrackingRecord record, TimeSpan timeout, AsyncCallback callback, object state)
|
|
{
|
|
return new TrackAsyncResult(this, record, timeout, callback, state);
|
|
}
|
|
|
|
[Fx.Tag.InheritThrows(From = "Track", FromDeclaringType = typeof(TrackingParticipant))]
|
|
protected internal virtual void EndTrack(IAsyncResult result)
|
|
{
|
|
TrackAsyncResult.End(result);
|
|
}
|
|
|
|
[Fx.Tag.Throws(typeof(Exception), "extensibility point")]
|
|
[Fx.Tag.Throws.Timeout("Tracking data could not be saved before the timeout")]
|
|
protected internal abstract void Track(TrackingRecord record, TimeSpan timeout);
|
|
|
|
class TrackAsyncResult : AsyncResult
|
|
{
|
|
static Action<object> asyncExecuteTrack = new Action<object>(ExecuteTrack);
|
|
TrackingParticipant participant;
|
|
TrackingRecord record;
|
|
TimeSpan timeout;
|
|
|
|
public TrackAsyncResult(TrackingParticipant participant, TrackingRecord record, TimeSpan timeout, AsyncCallback callback, object state)
|
|
: base(callback, state)
|
|
{
|
|
this.participant = participant;
|
|
this.record = record;
|
|
this.timeout = timeout;
|
|
ActionItem.Schedule(asyncExecuteTrack, this);
|
|
}
|
|
|
|
public static void End(IAsyncResult result)
|
|
{
|
|
AsyncResult.End<TrackAsyncResult>(result);
|
|
}
|
|
|
|
static void ExecuteTrack(object state)
|
|
{
|
|
TrackAsyncResult thisPtr = (TrackAsyncResult)state;
|
|
thisPtr.TrackCore();
|
|
}
|
|
|
|
void TrackCore()
|
|
{
|
|
Exception participantException = null;
|
|
try
|
|
{
|
|
this.participant.Track(this.record, this.timeout);
|
|
}
|
|
catch (Exception exception)
|
|
{
|
|
if (Fx.IsFatal(exception))
|
|
{
|
|
throw;
|
|
}
|
|
|
|
participantException = exception;
|
|
}
|
|
base.Complete(false, participantException);
|
|
}
|
|
}
|
|
|
|
}
|
|
}
|