// Save the workflow instance state at the point of persistence with option of locking the instance state if it is shared
// across multiple runtimes or multiple phase instance updates
protected override void SaveWorkflowInstanceState(Activity rootActivity, bool unlock)
{
// Save the workflow
Guid contextGuid = (Guid)rootActivity.GetValue(Activity.ActivityContextGuidProperty);
Console.WriteLine("Saving instance: {0}\n", contextGuid);
SerializeToFile(
WorkflowPersistenceService.GetDefaultSerializedForm(rootActivity), contextGuid);
// See when the next timer (Delay activity) for this workflow will expire
TimerEventSubscriptionCollection timers = (TimerEventSubscriptionCollection)rootActivity.GetValue(TimerEventSubscriptionCollection.TimerCollectionProperty);
TimerEventSubscription subscription = timers.Peek();
if (subscription != null)
{
// Set a system timer to automatically reload this workflow when its next timer expires
TimerCallback callback = new TimerCallback(ReloadWorkflow);
TimeSpan timeDifference = subscription.ExpiresAt - DateTime.UtcNow;
// check to make sure timeDifference is in legal range
if (timeDifference > FilePersistenceService.MaxInterval)
{
timeDifference = FilePersistenceService.MaxInterval;
}
else if (timeDifference < TimeSpan.Zero)
{
timeDifference = TimeSpan.Zero;
}
this.instanceTimers.Add(contextGuid, new System.Threading.Timer(
callback,
subscription.WorkflowInstanceId,
timeDifference,
new TimeSpan(-1)));
}
}
// Save the workflow instance state at the point of persistence with option of locking the instance state if it is shared
// across multiple runtimes or multiple phase instance updates
protected override void SaveWorkflowInstanceState(Activity rootActivity, bool unlock)
{
// Save the workflow
var contextId = (Guid)rootActivity.GetValue(Activity.ActivityContextGuidProperty);
_instanceStore[contextId] = GetDefaultSerializedForm(rootActivity);
// See when the next timer (Delay activity) for this workflow will expire
var timers = (TimerEventSubscriptionCollection)rootActivity.GetValue(TimerEventSubscriptionCollection.TimerCollectionProperty);
TimerEventSubscription subscription = timers.Peek();
if (subscription != null)
{
// Set a system timer to automatically reload this workflow when its next timer expires
TimeSpan timeDifference = subscription.ExpiresAt - DateTime.UtcNow;
// check to make sure timeDifference is in legal range
if (timeDifference > MaxInterval)
{
timeDifference = MaxInterval;
}
else if (timeDifference < TimeSpan.Zero)
{
timeDifference = TimeSpan.Zero;
}
_instanceTimers.Add(contextId, new Timer(
ReloadWorkflow,
subscription.WorkflowInstanceId,
timeDifference,
new TimeSpan(-1)));
}
}
void IEventActivity.Subscribe(ActivityExecutionContext parentContext, IActivityEventListener <QueueEventArgs> parentEventHandler)
{
if (parentContext == null)
{
throw new ArgumentNullException("parentContext");
}
if (parentEventHandler == null)
{
throw new ArgumentNullException("parentEventHandler");
}
this.IsInEventActivityMode = true;
base.RaiseEvent(InitializeTimeoutDurationEvent, this, EventArgs.Empty);
TimeSpan timeoutDuration = this.TimeoutDuration;
DateTime expiresAt = DateTime.UtcNow + timeoutDuration;
WorkflowQueuingService service = parentContext.GetService <WorkflowQueuingService>();
IComparable queueName = ((IEventActivity)this).QueueName;
TimerEventSubscription item = new TimerEventSubscription((Guid)queueName, base.WorkflowInstanceId, expiresAt);
service.CreateWorkflowQueue(queueName, false).RegisterForQueueItemAvailable(parentEventHandler, base.QualifiedName);
this.SubscriptionID = item.SubscriptionId;
Activity parent = this;
while (parent.Parent != null)
{
parent = parent.Parent;
}
((TimerEventSubscriptionCollection)parent.GetValue(TimerEventSubscriptionCollection.TimerCollectionProperty)).Add(item);
}
/// <summary>
/// Persist a workflow instance to the persistence store.
/// </summary>
/// <param name="rootActivity">
/// Root activity of the workflow instance.
/// </param>
/// <param name="unlock">
/// Indicates whether to unlock the instance when complete.
/// </param>
protected override void SaveWorkflowInstanceState(Activity rootActivity, bool unlock)
{
TraceHelper.Trace();
try
{
if (rootActivity == null)
{
throw new ArgumentNullException("rootActivity");
}
PendingWorkItem workItem = new PendingWorkItem();
workItem.Status = GetWorkflowStatus(rootActivity);
workItem.IsBlocked = GetIsBlocked(rootActivity);
workItem.Info = GetSuspendOrTerminateInfo(rootActivity);
workItem.StateId = (Guid)rootActivity.GetValue(Activity.ActivityContextGuidProperty);
workItem.Type = PendingWorkItem.ItemType.Instance;
workItem.InstanceId = WorkflowEnvironment.WorkflowInstanceId;
workItem.Unlock = unlock;
if (workItem.Status != WorkflowStatus.Completed && workItem.Status != WorkflowStatus.Terminated)
{
workItem.SerialisedActivity = GetDefaultSerializedForm(rootActivity);
}
else
{
workItem.SerialisedActivity = new byte[0];
}
TimerEventSubscription timerEventSubscription =
((TimerEventSubscriptionCollection)rootActivity.GetValue(
TimerEventSubscriptionCollection.TimerCollectionProperty)).Peek();
if (timerEventSubscription == null)
{
workItem.NextTimer = null;
}
else
{
workItem.NextTimer = timerEventSubscription.ExpiresAt;
}
WorkflowEnvironment.WorkBatch.Add(this, workItem);
}
catch (Exception e)
{
WfLogHelper.WriteLog("持久化SaveWorkflowInstanceState发生异常:" + e.ToString());
string errorMessage = RM.Get_Error_PersistenceServiceException(e.ToString());
TraceHelper.Trace(errorMessage);
PersistenceException persistenceException =
new PersistenceException(errorMessage, e);
base.RaiseServicesExceptionNotHandledEvent(
persistenceException,
WorkflowEnvironment.WorkflowInstanceId);
throw persistenceException;
}
}
public void Constructor2()
{
TimerEventSubscription timer;
Guid workflowInstanceId = Guid.NewGuid();
DateTime expiresAt = DateTime.Today;
timer = new TimerEventSubscription(workflowInstanceId, expiresAt);
Assert.AreEqual(workflowInstanceId, timer.WorkflowInstanceId, "C1#1");
Assert.AreEqual(timer.SubscriptionId, timer.QueueName, "C1#2");
}
public void TestCollection()
{
TimerEventSubscriptionCollection col;
// There is no public constructor for TimerEventSubscriptionCollection
col = (TimerEventSubscriptionCollection)Activator.CreateInstance
(typeof(TimerEventSubscriptionCollection),
BindingFlags.Instance | BindingFlags.Static | BindingFlags.NonPublic | BindingFlags.Public,
null, null, null);
TimerEventSubscription event1 = new TimerEventSubscription(Guid.NewGuid(),
new DateTime(2006, 07, 30));
TimerEventSubscription event2 = new TimerEventSubscription(Guid.NewGuid(),
new DateTime(2006, 07, 28));
TimerEventSubscription event3 = new TimerEventSubscription(Guid.NewGuid(),
new DateTime(2006, 08, 28));
TimerEventSubscription event4 = new TimerEventSubscription(Guid.NewGuid(),
new DateTime(2007, 08, 28));
TimerEventSubscription event5 = new TimerEventSubscription(Guid.NewGuid(),
new DateTime(2006, 05, 28));
TimerEventSubscription event6 = new TimerEventSubscription(Guid.NewGuid(),
new DateTime(2008, 02, 28));
TimerEventSubscription event7 = new TimerEventSubscription(Guid.NewGuid(),
new DateTime(2005, 05, 28));
col.Add(event1);
col.Add(event2);
col.Add(event3);
col.Add(event4);
col.Add(event5);
col.Add(event6);
col.Add(event7);
Assert.AreEqual(event7.ExpiresAt, col.Peek().ExpiresAt, "C1#1");
col.Remove(col.Peek());
Assert.AreEqual(event5.ExpiresAt, col.Peek().ExpiresAt, "C1#2");
col.Remove(col.Peek());
Assert.AreEqual(event2.ExpiresAt, col.Peek().ExpiresAt, "C1#3");
col.Remove(col.Peek());
Assert.AreEqual(event1.ExpiresAt, col.Peek().ExpiresAt, "C1#4");
col.Remove(col.Peek());
Assert.AreEqual(event3.ExpiresAt, col.Peek().ExpiresAt, "C1#5");
col.Remove(col.Peek());
Assert.AreEqual(event4.ExpiresAt, col.Peek().ExpiresAt, "C1#6");
}
protected IComparable SetTimer(ActivityExecutionContext executionContext, DateTime expiresAt)
{
#if RUNTIME_DEP
TimerEventSubscription te;
WorkflowQueue queue;
te = new TimerEventSubscription(executionContext.ExecutionContextManager.Workflow.InstanceId,
expiresAt);
WorkflowQueuingService qService = executionContext.GetService <WorkflowQueuingService> ();
queue = qService.CreateWorkflowQueue(te.QueueName, true);
queue.QueueItemArrived += OnQueueTimerItemArrived;
executionContext.ExecutionContextManager.Workflow.TimerEventSubscriptionCollection.Add(te);
return(te.QueueName);
#else
return(null);
#endif
}
void IEventActivity.Subscribe(ActivityExecutionContext parentContext, IActivityEventListener <QueueEventArgs> parentEventHandler)
{
if (parentContext == null)
{
throw new ArgumentNullException("parentContext");
}
if (parentEventHandler == null)
{
throw new ArgumentNullException("parentEventHandler");
}
this.IsInEventActivityMode = true;
base.RaiseEvent(DelayActivity.InitializeTimeoutDurationEvent, this, EventArgs.Empty);
TimeSpan timeSpan = this.TimeoutDuration;
DateTime timeOut = DateTime.UtcNow + timeSpan;
WorkflowQueuingService qService = parentContext.GetService <WorkflowQueuingService>();
IComparable queueName = ((IEventActivity)this).QueueName;
TimerEventSubscription timerSub = new TimerEventSubscription((Guid)queueName, this.WorkflowInstanceId, timeOut);
WorkflowQueue queue = qService.CreateWorkflowQueue(queueName, false);
queue.RegisterForQueueItemAvailable(parentEventHandler, this.QualifiedName);
this.SubscriptionID = timerSub.SubscriptionId;
Activity root = this;
while (root.Parent != null)
{
root = root.Parent;
}
TimerEventSubscriptionCollection timers = (TimerEventSubscriptionCollection)root.GetValue(TimerEventSubscriptionCollection.TimerCollectionProperty);
Debug.Assert(timers != null, "TimerEventSubscriptionCollection on root activity should never be null, but it was");
timers.Add(timerSub);
}
protected internal override void SaveWorkflowInstanceState(Activity rootActivity, bool unlock)
{
if (rootActivity == null)
{
throw new ArgumentNullException("rootActivity");
}
WorkflowStatus workflowStatus = WorkflowPersistenceService.GetWorkflowStatus(rootActivity);
bool isBlocked = WorkflowPersistenceService.GetIsBlocked(rootActivity);
string suspendOrTerminateInfo = WorkflowPersistenceService.GetSuspendOrTerminateInfo(rootActivity);
Guid guid = (Guid)rootActivity.GetValue(Activity.ActivityContextGuidProperty);
PendingWorkItem workItem = new PendingWorkItem {
Type = PendingWorkItem.ItemType.Instance,
InstanceId = WorkflowEnvironment.WorkflowInstanceId
};
if ((workflowStatus != WorkflowStatus.Completed) && (workflowStatus != WorkflowStatus.Terminated))
{
workItem.SerializedActivity = WorkflowPersistenceService.GetDefaultSerializedForm(rootActivity);
}
else
{
workItem.SerializedActivity = new byte[0];
}
workItem.Status = (int)workflowStatus;
workItem.Blocked = isBlocked ? 1 : 0;
workItem.Info = suspendOrTerminateInfo;
workItem.StateId = guid;
workItem.Unlocked = unlock;
TimerEventSubscription subscription = ((TimerEventSubscriptionCollection)rootActivity.GetValue(TimerEventSubscriptionCollection.TimerCollectionProperty)).Peek();
workItem.NextTimer = (subscription == null) ? SqlDateTime.MaxValue : subscription.ExpiresAt;
if (workItem.Info == null)
{
workItem.Info = "";
}
WorkflowTrace.Host.TraceEvent(TraceEventType.Information, 0, "SqlWorkflowPersistenceService({4}):Committing instance {0}, Blocked={1}, Unlocked={2}, NextTimer={3}", new object[] { guid.ToString(), workItem.Blocked, workItem.Unlocked, workItem.NextTimer.Value.ToLocalTime(), this._serviceInstanceId.ToString() });
WorkflowEnvironment.WorkBatch.Add(this, workItem);
}
