// *************************************************************
// Workaround to maintain cache integrity in authorization token revoke scenario
public void RemoveAuthorizationTokenFromCache(ActivityDO activity)
{
lock (_loadedNodes)
{
foreach (var loadedPlan in _loadedPlans)
{
PlanTreeHelper.Visit(loadedPlan.Root, x =>
{
var a = x as ActivityDO;
if (a != null && a.Id == activity.Id)
{
a.AuthorizationToken = null;
a.AuthorizationTokenId = null;
}
});
}
}
_planStorage.UpdateElement(activity.Id, x =>
{
var a = x as ActivityDO;
if (a != null)
{
a.AuthorizationToken = null;
a.AuthorizationTokenId = null;
}
});
}
/**********************************************************************************/
public TPlanNode GetById <TPlanNode>(Guid id)
where TPlanNode : PlanNodeDO
{
lock (_loadedNodes)
{
LoadedPlan loadedPlan;
// if we have loaded this node before?
if (!_loadedNodes.TryGetValue(id, out loadedPlan))
{
// try to load plan for this node
var plan = GetPlanByMemberId(id);
// non existent node or new node that has not been saved yet
if (plan == null)
{
return(null);
}
loadedPlan = new LoadedPlan(plan);
_loadedPlans.Add(loadedPlan);
// add all noded to the loaded nodes list
PlanTreeHelper.Visit(plan, x => _loadedNodes.Add(x.Id, loadedPlan));
}
// search for the node in the corresponding plans
return((TPlanNode)loadedPlan.Find(id));
}
}
/**********************************************************************************/
private void AddToCache(PlanNodeDO root)
{
var expirOn = _expirationStrategy.NewExpirationToken();
var cachedPlan = new CachedPlan(root, expirOn);
_plans.Add(root.Id, cachedPlan);
PlanTreeHelper.Visit(root, x => _planNodesLookup.Add(x.Id, new CacheItem(x, cachedPlan)));
}
/**********************************************************************************/
public PlanSnapshot(PlanNodeDO node, bool cloneNodes)
{
PlanTreeHelper.Visit(node, (x, y) =>
{
var clone = cloneNodes ? x.Clone() : x;
_nodes[x.Id] = clone;
clone.ParentPlanNodeId = y != null ? y.Id : (Guid?)null;
});
}
/**********************************************************************************/
private void DropCachedPlan(PlanNodeDO root)
{
CachedPlan cachedPlan;
if (!_plans.TryGetValue(root.Id, out cachedPlan))
{
return;
}
PlanTreeHelper.Visit(root, x => _planNodesLookup.Remove(x.Id));
_plans.Remove(root.Id);
}
/**********************************************************************************/
private void RemoveExpiredPlans()
{
lock (_sync)
{
foreach (var planExpiration in _plans.ToArray())
{
if (planExpiration.Value.Expiration.IsExpired())
{
_plans.Remove(planExpiration.Key);
PlanTreeHelper.Visit(planExpiration.Value.Root, x => _planNodesLookup.Remove(x.Id));
}
}
}
}
/**********************************************************************************/
// this is just simplification for the first implementation.
// We can only insert plans. If we want to edit plan, we need to get corresponding node and edit it's children
public void Add(PlanDO plan)
{
lock (_loadedNodes)
{
var loadedPlan = new LoadedPlan(plan, true);
PlanTreeHelper.Visit(plan, x =>
{
if (x.Id == Guid.Empty)
{
x.Id = Guid.NewGuid();
}
_loadedNodes.Add(x.Id, loadedPlan);
});
_loadedPlans.Add(loadedPlan);
}
}
/**********************************************************************************/
public PlanNodeDO Get(Guid id, Func <Guid, PlanNodeDO> cacheMissCallback)
{
PlanNodeDO node;
lock (_sync)
{
CacheItem cacheItem;
if (!_planNodesLookup.TryGetValue(id, out cacheItem))
{
node = cacheMissCallback(id);
if (node == null)
{
return(null);
}
// Get the root of PlanNode tree.
while (node.ParentPlanNode != null)
{
node = node.ParentPlanNode;
}
// Check cache integrity
if (PlanTreeHelper.Linearize(node).Any(x => _planNodesLookup.ContainsKey(x.Id)))
{
DropCachedPlan(node);
}
AddToCache(node);
}
else
{
node = cacheItem.Plan.Root;
// update plan expiration
cacheItem.Plan.Expiration = _expirationStrategy.NewExpirationToken();
}
node = PlanTreeHelper.CloneWithStructure(node);
}
return(node);
}
/**********************************************************************************/
public void SaveChanges()
{
lock (_loadedNodes)
{
foreach (var loadedPlan in _loadedPlans)
{
var plan = loadedPlan;
plan.Root.LastUpdated = DateTimeOffset.UtcNow;
var parentPlan = loadedPlan.Root as PlanDO;
PlanTreeHelper.Visit(loadedPlan.Root, (x, y) =>
{
if (x.Id == Guid.Empty)
{
x.Id = Guid.NewGuid();
}
x.ParentPlanNode = y;
x.ParentPlanNodeId = y != null ? y.Id : (Guid?)null;
if (parentPlan != null)
{
x.Fr8AccountId = parentPlan.Fr8AccountId;
x.Fr8Account = parentPlan.Fr8Account;
x.RootPlanNodeId = parentPlan.Id;
UpdateForeignKeys(x);
}
else
{
UpdateForeignKeys(x);
}
_loadedNodes[x.Id] = plan;
});
var previous = loadedPlan.RebuildSnapshot();
var changes = loadedPlan.Snapshot.Compare(previous);
_planStorage.Update(loadedPlan.Root.Id, changes);
}
}
}
public PlanNodeDO Find(Guid nodeId)
{
if (IsDeleted)
{
return(null);
}
PlanNodeDO result = null;
PlanTreeHelper.Visit(Root, x =>
{
if (x.Id == nodeId)
{
result = x;
return(false);
}
return(true);
});
return(result);
}
/**********************************************************************************/
public PlanSnapshot.Changes Update(Guid planId, PlanSnapshot.Changes changes)
{
var validChanges = new PlanSnapshot.Changes();
lock (_sync)
{
CachedPlan plan;
if (!_plans.TryGetValue(planId, out plan))
{
foreach (var insert in changes.Insert)
{
var clone = insert.Clone();
if (insert is PlanDO)
{
plan = new CachedPlan((PlanDO)clone, _expirationStrategy.NewExpirationToken());
_plans.Add(planId, plan);
_planNodesLookup.Add(planId, new CacheItem(clone, plan));
clone.RootPlanNode = clone;
break;
}
}
}
foreach (var insert in changes.Insert)
{
if (!_planNodesLookup.ContainsKey(insert.Id))
{
if (insert.ParentPlanNodeId == null || _planNodesLookup.ContainsKey(insert.ParentPlanNodeId.Value))
{
_planNodesLookup.Add(insert.Id, new CacheItem(insert.Clone(), plan));
}
}
}
foreach (var insert in changes.Insert)
{
CacheItem nodeCacheItem;
if (!_planNodesLookup.TryGetValue(insert.Id, out nodeCacheItem))
{
continue;
}
validChanges.Insert.Add(insert);
var node = nodeCacheItem.Node;
if (insert.ParentPlanNodeId != null)
{
var parent = _planNodesLookup[insert.ParentPlanNodeId.Value].Node;
parent.ChildNodes.Add(node);
node.ParentPlanNode = parent;
node.RootPlanNode = plan.Root;
}
}
foreach (var deleted in changes.Delete)
{
CachedPlan cachedPlan;
if (_plans.TryGetValue(deleted.Id, out cachedPlan))
{
PlanTreeHelper.Visit(plan.Root, x =>
{
_planNodesLookup.Remove(x.Id);
validChanges.Delete.Add(x);
});
_plans.Remove(plan.Root.Id);
return(validChanges);
}
CacheItem node;
if (_planNodesLookup.TryGetValue(deleted.Id, out node))
{
validChanges.Delete.Add(deleted);
_planNodesLookup.Remove(deleted.Id);
node.Node.RemoveFromParent();
}
}
foreach (var update in changes.Update)
{
bool approveUpdate = false;
foreach (var changedProperty in update.ChangedProperties)
{
CacheItem originalCacheItem;
if (!_planNodesLookup.TryGetValue(update.Node.Id, out originalCacheItem))
{
continue;
}
var original = originalCacheItem.Node;
// structure was changed
if (changedProperty.Name == "ParentPlanNodeId")
{
CacheItem parentCacheItem;
if (update.Node.ParentPlanNodeId == null || !_planNodesLookup.TryGetValue(update.Node.ParentPlanNodeId.Value, out parentCacheItem))
{
continue;
}
var parent = parentCacheItem.Node;
original.RemoveFromParent();
parent.ChildNodes.Add(original);
original.ParentPlanNode = parent;
original.ParentPlanNodeId = parent.Id;
approveUpdate = true;
}
else
{
approveUpdate = true;
changedProperty.SetValue(original, changedProperty.GetValue(update.Node));
}
}
if (approveUpdate)
{
validChanges.Update.Add(update);
}
}
}
return(validChanges);
}
/**********************************************************************************/
// This method updates locally cached elements from global cache or DB
// This method will overwrite all local changes
public TPlanNode Reload <TPlanNode>(Guid id)
where TPlanNode : PlanNodeDO
{
var planFromDb = GetPlanByMemberId(id);
lock (_loadedNodes)
{
// have we already loaded this plan?
var loadedPlan = _loadedPlans.FirstOrDefault(x => x.Root.Id == planFromDb.Id);
if (loadedPlan == null)
{
//if no, then just get this plan by id
return(GetById <TPlanNode>(id));
}
// get list of currently loaded items
var currentNodes = PlanTreeHelper.Linearize(loadedPlan.Root).ToDictionary(x => x.Id, x => x);
var dbNodes = PlanTreeHelper.Linearize(planFromDb).ToDictionary(x => x.Id, x => x);
foreach (var planNodeDo in dbNodes)
{
PlanNodeDO currentNode;
// sync structure
var originalChildren = planNodeDo.Value.ChildNodes;
planNodeDo.Value.ChildNodes = new List <PlanNodeDO>(originalChildren.Count);
foreach (var childNode in originalChildren)
{
planNodeDo.Value.ChildNodes.Add(GetNewNodeOrGetExising(currentNodes, childNode));
}
planNodeDo.Value.ParentPlanNode = GetNewNodeOrGetExising(currentNodes, planNodeDo.Value.ParentPlanNode);
planNodeDo.Value.RootPlanNode = GetNewNodeOrGetExising(currentNodes, planNodeDo.Value.RootPlanNode);
if (currentNodes.TryGetValue(planNodeDo.Key, out currentNode))
{
//sync local cached properties with db one
currentNode.SyncPropertiesWith(planNodeDo.Value);
currentNode.ChildNodes = planNodeDo.Value.ChildNodes;
currentNode.ParentPlanNode = planNodeDo.Value.ParentPlanNode;
currentNode.RootPlanNode = planNodeDo.Value.RootPlanNode;
}
else // we don't have this node in our local cache.
{
_loadedNodes[planNodeDo.Key] = loadedPlan;
}
}
// remove nodes, that we deleted in the DB version
foreach (var planNodeDo in currentNodes)
{
if (!dbNodes.ContainsKey(planNodeDo.Key))
{
_loadedNodes.Remove(planNodeDo.Key);
}
}
loadedPlan.RebuildSnapshot();
return((TPlanNode)loadedPlan.Find(id));
}
}
