public BookmarkResumptionResult TryGenerateWorkItem(ActivityExecutor executor, ref Bookmark bookmark, BookmarkScope scope, object value, System.Activities.ActivityInstance isolationInstance, bool nonScopedBookmarksExist, out ActivityExecutionWorkItem workItem)
{
BookmarkManager manager = null;
Bookmark bookmark3;
BookmarkCallbackWrapper wrapper2;
BookmarkResumptionResult result3;
workItem = null;
BookmarkScope key = scope;
if (scope.IsDefault)
{
key = this.defaultScope;
}
this.bookmarkManagers.TryGetValue(key, out manager);
if (manager == null)
{
BookmarkResumptionResult notFound = BookmarkResumptionResult.NotFound;
if (this.uninitializedScopes != null)
{
for (int i = 0; i < this.uninitializedScopes.Count; i++)
{
Bookmark bookmark2;
BookmarkCallbackWrapper wrapper;
BookmarkResumptionResult notReady;
BookmarkScope scope3 = this.uninitializedScopes[i];
if (!this.bookmarkManagers[scope3].TryGetBookmarkFromInternalList(bookmark, out bookmark2, out wrapper))
{
notReady = BookmarkResumptionResult.NotFound;
}
else if (this.IsExclusiveScopeUnstable(bookmark2))
{
notReady = BookmarkResumptionResult.NotReady;
}
else
{
notReady = this.bookmarkManagers[scope3].TryGenerateWorkItem(executor, true, ref bookmark, value, isolationInstance, out workItem);
}
switch (notReady)
{
case BookmarkResumptionResult.Success:
this.InitializeBookmarkScopeWithoutKeyAssociation(scope3, scope.Id);
return(BookmarkResumptionResult.Success);
case BookmarkResumptionResult.NotReady:
notFound = BookmarkResumptionResult.NotReady;
break;
default:
if ((notFound == BookmarkResumptionResult.NotFound) && !this.IsStable(scope3, nonScopedBookmarksExist))
{
notFound = BookmarkResumptionResult.NotReady;
}
break;
}
}
}
return(notFound);
}
if (!manager.TryGetBookmarkFromInternalList(bookmark, out bookmark3, out wrapper2))
{
result3 = BookmarkResumptionResult.NotFound;
}
else if (this.IsExclusiveScopeUnstable(bookmark3))
{
result3 = BookmarkResumptionResult.NotReady;
}
else
{
result3 = manager.TryGenerateWorkItem(executor, true, ref bookmark, value, isolationInstance, out workItem);
}
if ((result3 == BookmarkResumptionResult.NotFound) && !this.IsStable(key, nonScopedBookmarksExist))
{
result3 = BookmarkResumptionResult.NotReady;
}
return(result3);
}
public BookmarkResumptionResult TryGenerateWorkItem(ActivityExecutor executor, ref Bookmark bookmark, BookmarkScope scope, object value, ActivityInstance isolationInstance, bool nonScopedBookmarksExist, out ActivityExecutionWorkItem workItem)
{
Fx.Assert(scope != null, "We should never have a null sub instance.");
BookmarkManager manager = null;
workItem = null;
BookmarkScope lookupScope = scope;
if (scope.IsDefault)
{
lookupScope = this.defaultScope;
}
// We don't really care about the return value since we'll
// use null to know we should check uninitialized sub instances
this.bookmarkManagers.TryGetValue(lookupScope, out manager);
if (manager == null)
{
Fx.Assert(lookupScope != null, "The sub instance should not be default if we are here.");
BookmarkResumptionResult finalResult = BookmarkResumptionResult.NotFound;
// Check the uninitialized sub instances for a matching bookmark
if (this.uninitializedScopes != null)
{
for (int i = 0; i < this.uninitializedScopes.Count; i++)
{
BookmarkScope uninitializedScope = this.uninitializedScopes[i];
Fx.Assert(this.bookmarkManagers.ContainsKey(uninitializedScope), "We must always have the uninitialized sub instances.");
Bookmark internalBookmark;
BookmarkCallbackWrapper callbackWrapper;
BookmarkResumptionResult resumptionResult;
if (!this.bookmarkManagers[uninitializedScope].TryGetBookmarkFromInternalList(bookmark, out internalBookmark, out callbackWrapper))
{
resumptionResult = BookmarkResumptionResult.NotFound;
}
else if (IsExclusiveScopeUnstable(internalBookmark))
{
resumptionResult = BookmarkResumptionResult.NotReady;
}
else
{
resumptionResult = this.bookmarkManagers[uninitializedScope].TryGenerateWorkItem(executor, true, ref bookmark, value, isolationInstance, out workItem);
}
if (resumptionResult == BookmarkResumptionResult.Success)
{
// We are using InitializeBookmarkScopeWithoutKeyAssociation because we know this is a new uninitialized scope and
// the key we would associate is already associated. And if we did the association here, the subsequent call to
// FlushBookmarkScopeKeys would try to flush it out, but it won't have the transaction correct so will hang waiting for
// the transaction that has the PersistenceContext locked to complete. But it won't complete successfully until
// we finish processing here.
InitializeBookmarkScopeWithoutKeyAssociation(uninitializedScope, scope.Id);
// We've found what we were looking for
return(BookmarkResumptionResult.Success);
}
else if (resumptionResult == BookmarkResumptionResult.NotReady)
{
// This uninitialized sub-instance has a matching bookmark but
// it can't currently be resumed. We won't return BookmarkNotFound
// because of this.
finalResult = BookmarkResumptionResult.NotReady;
}
else
{
if (finalResult == BookmarkResumptionResult.NotFound)
{
// If we still are planning on returning failure then
// we'll incur the cost of seeing if this scope is
// stable or not.
if (!IsStable(uninitializedScope, nonScopedBookmarksExist))
{
// There exists an uninitialized scope which is unstable.
// At the very least this means we'll return NotReady since
// this uninitialized scope might eventually contain this
// bookmark.
finalResult = BookmarkResumptionResult.NotReady;
}
}
}
}
}
return(finalResult);
}
else
{
Bookmark bookmarkFromList;
BookmarkCallbackWrapper callbackWrapper;
BookmarkResumptionResult resumptionResult;
if (!manager.TryGetBookmarkFromInternalList(bookmark, out bookmarkFromList, out callbackWrapper))
{
resumptionResult = BookmarkResumptionResult.NotFound;
}
else
{
if (IsExclusiveScopeUnstable(bookmarkFromList))
{
resumptionResult = BookmarkResumptionResult.NotReady;
}
else
{
resumptionResult = manager.TryGenerateWorkItem(executor, true, ref bookmark, value, isolationInstance, out workItem);
}
}
if (resumptionResult == BookmarkResumptionResult.NotFound)
{
if (!IsStable(lookupScope, nonScopedBookmarksExist))
{
resumptionResult = BookmarkResumptionResult.NotReady;
}
}
return(resumptionResult);
}
}