internal void ApplyTo(Activity activity)
{
if (activity == null)
{
throw new ArgumentNullException("activity");
}
if (activity.Parent != null)
{
throw new ArgumentException(SR.GetString(SR.Error_RootActivityTypeInvalid), "activity");
}
if (activity.RootActivity == null)
{
throw new InvalidOperationException(SR.GetString(SR.Error_MissingRootActivity));
}
if (activity.WorkflowCoreRuntime == null)
{
throw new InvalidOperationException(SR.GetString(SR.Error_NoRuntimeAvailable));
}
if (this.saved)
{
throw new InvalidOperationException(SR.GetString(SR.Error_TransactionAlreadyApplied));
}
if (!CompareWorkflowDefinition((Activity)this.originalRootActivity, (Activity)activity.RootActivity.GetValue(Activity.WorkflowDefinitionProperty)))
{
throw new ArgumentException(SR.GetString(SR.Error_WorkflowDefinitionModified), "activity");
}
this.Save();
// go up in the chain and then apply changes
IWorkflowCoreRuntime workflowCoreRuntime = activity.WorkflowCoreRuntime;
if (workflowCoreRuntime.CurrentAtomicActivity != null)
{
throw new InvalidOperationException(SR.GetString(SR.Error_InsideAtomicScope));
}
bool suspended = workflowCoreRuntime.SuspendInstance(SR.GetString(SR.SuspendReason_WorkflowChange));
try
{
// collect all context Activities
List <Activity> contextActivities = new List <Activity>();
Queue <Activity> contextActivitiesQueue = new Queue <Activity>();
contextActivitiesQueue.Enqueue(workflowCoreRuntime.RootActivity);
while (contextActivitiesQueue.Count > 0)
{
Activity contextActivity = contextActivitiesQueue.Dequeue();
contextActivities.Add(contextActivity);
// enqueue child context Activities
IList <Activity> nestedContextActivities = (IList <Activity>)contextActivity.GetValue(Activity.ActiveExecutionContextsProperty);
if (nestedContextActivities != null)
{
foreach (Activity nestedContextActivity in nestedContextActivities)
{
contextActivitiesQueue.Enqueue(nestedContextActivity);
}
}
}
// run instance level validations
ValidationErrorCollection validationErrors = new ValidationErrorCollection();
foreach (WorkflowChangeAction changeAction in this.modelChangeActions)
{
if (changeAction is ActivityChangeAction)
{
foreach (Activity contextActivity in contextActivities)
{
// WinOE
if (changeAction is RemovedActivityAction &&
contextActivity.DottedPath == ((RemovedActivityAction)changeAction).OriginalRemovedActivity.DottedPath)
{
validationErrors.AddRange(changeAction.ValidateChanges(contextActivity));
}
// Ask the parent context activity whether or not this child activity can be added or removed.
// The call to TraverseDottedPathFromRoot here should return the parent context activity for this change action.
if (contextActivity.TraverseDottedPathFromRoot(((ActivityChangeAction)changeAction).OwnerActivityDottedPath) != null)
{
validationErrors.AddRange(changeAction.ValidateChanges(contextActivity));
}
}
}
}
// if errors then return
if (validationErrors.HasErrors)
{
throw new WorkflowValidationFailedException(SR.GetString(SR.Error_RuntimeValidationFailed), validationErrors);
}
// verify if workflow can be changed
VerifyWorkflowCanBeChanged(workflowCoreRuntime);
// inform workflow runtime
workflowCoreRuntime.OnBeforeDynamicChange(this.modelChangeActions);
// set the new Workflow Definition
workflowCoreRuntime.RootActivity.SetValue(Activity.WorkflowDefinitionProperty, this.clonedRootActivity);
// apply changes to all context Activities
foreach (Activity contextActivity in contextActivities)
{
// apply change to state reader
foreach (WorkflowChangeAction changeAction in this.modelChangeActions)
{
if (changeAction is ActivityChangeAction)
{
if (contextActivity.TraverseDottedPathFromRoot(((ActivityChangeAction)changeAction).OwnerActivityDottedPath) != null)
{
bool result = changeAction.ApplyTo(contextActivity);
Debug.Assert(result, "ApplyTo failed");
}
}
}
// fixup meta properties and notify changes
// if the context activity is the one that's being removed, we do not fixup the meta properties.
Activity clonedActivity = ((Activity)this.clonedRootActivity).GetActivityByName(contextActivity.QualifiedName);
if (clonedActivity != null)
{
contextActivity.FixUpMetaProperties(clonedActivity);
}
NotifyChangesToChildExecutors(workflowCoreRuntime, contextActivity, this.modelChangeActions);
NotifyChangesCompletedToChildExecutors(workflowCoreRuntime, contextActivity);
}
// inform workflow runtime
workflowCoreRuntime.OnAfterDynamicChange(true, this.modelChangeActions);
}
catch
{
workflowCoreRuntime.OnAfterDynamicChange(false, this.modelChangeActions);
throw;
}
finally
{
if (suspended)
{
workflowCoreRuntime.Resume();
}
}
}