public void Close()
{
lock (managerStateLock)
{
if (this.state == ManagerState.Closed)
{
return;
}
else
{
this.state = ManagerState.Closed;
}
}
List <WorkflowApplication> instances;
lock (instanceStatesLock)
{
instances = new List <WorkflowApplication>();
Guid[] keys = this.instanceStates.Keys.ToArray();
for (int index = 0; index < keys.Length; index++)
{
WorkflowApplicationState instanceState = this.instanceStates[keys[index]];
if (instanceState.IsLoaded)
{
instances.Add(instanceState.WorkflowApplication);
}
instanceState.Close();
this.instanceStates.Remove(keys[index]);
}
}
Collection <IAsyncResult> unloadCalls = new Collection <IAsyncResult>();
foreach (WorkflowApplication instance in instances)
{
if (this.hostView.UsePersistence)
{
try
{
IAsyncResult result = instance.BeginUnload(null, instance);
unloadCalls.Add(result);
}
//swallow any exception - this is a best effort Close
catch (WorkflowApplicationException) { }
catch (InstancePersistenceException) { }
}
else
{
instance.Abort();
}
}
//can't wait on multiple handles under an STA thread
foreach (IAsyncResult result in unloadCalls)
{
result.AsyncWaitHandle.WaitOne();
WorkflowApplication instance = result.AsyncState as WorkflowApplication;
try
{
instance.EndUnload(result);
}
//swallow any exception - this is a best effort Close
catch (WorkflowApplicationException) { }
catch (InstancePersistenceException) { }
}
}
