async Task <SynchronizedType> Ensure(string typeID, CancellationToken cancelToken)
{
using (await CrossThreadLockScope.Enter(m_lock))
{
WeakReference <SynchronizedType> viewRef = null;
SynchronizedType view = null;
if (m_views.TryGetValue(typeID, out viewRef))
{
viewRef.TryGetTarget(out view);
}
if (view != null)
{
return(view);
}
view = new SynchronizedType(this, typeID);
await view.Load();
if (viewRef == null)
{
viewRef = new WeakReference <SynchronizedType>(view);
}
else
{
viewRef.SetTarget(view);
}
m_views[typeID] = viewRef;
return(view);
}
}
async Task <ItemQuery> GetSyncQuery(ISynchronizedView view)
{
if (!view.IsStale(m_maxAgeInSeconds))
{
return(null);
}
SynchronizedType sType = view as SynchronizedType;
if (sType != null && await sType.HasPendingChangesAsync())
{
return(null);
}
return(view.GetSynchronizationQuery());
}
internal async Task Load()
{
string viewName = SynchronizedType.MakeViewName(m_typeID);
m_items = await this.Store.GetViewAsync(viewName);
if (m_items == null)
{
m_items = this.Store.CreateView(viewName, ItemQuery.QueryForTypeID(m_typeID));
await this.SaveAsync();
}
m_items.PublicSyncDisabled = true;
m_items.ItemsAvailable += OnItemsAvailable;
m_items.ItemsNotFound += OnItemsNotFound;
m_items.Error += OnError;
}
public IAsyncOperation <IList <SynchronizedType> > GetMultipleAsync(IList <string> typeIDs)
{
if (typeIDs.IsNullOrEmpty())
{
throw new ArgumentException("typeIDs");
}
return(AsyncInfo.Run <IList <SynchronizedType> >(async cancelToken =>
{
List <SynchronizedType> sTypes = new List <SynchronizedType>();
foreach (string typeID in typeIDs)
{
SynchronizedType type = await this.Ensure(typeID, cancelToken);
sTypes.Add(type);
}
return sTypes;
}));
}
internal async Task OnChangeCommittedAsync(RecordItemChange change)
{
if (change.ChangeType != RecordItemChangeType.Put)
{
return;
}
try
{
SynchronizedType sType = await this.GetAsync(change.TypeID);
await sType.OnPutCommittedAsync(change);
this.TypeUpdated.SafeInvokeInUIThread(this, change.TypeID);
}
catch
{
}
}
async Task UpdateKeys(ISynchronizedView view, ItemQueryResult queryResult)
{
ViewKeyCollection keys = null;
if (queryResult != null)
{
keys = ViewKeyCollection.FromQueryResult(queryResult);
}
else
{
keys = new ViewKeyCollection();
}
view.UpdateKeys(keys);
SynchronizedType sType = view as SynchronizedType;
if (sType != null)
{
await sType.SaveAsync();
}
}
internal RecordItemEditOperation(SynchronizedType sType, IItemDataTyped data, RecordItemLock rLock)
{
m_sType = sType;
m_rLock = rLock;
m_data = data.Item.DeepClone().TypedData;
}
async Task<SynchronizedType> Ensure(string typeID, CancellationToken cancelToken)
{
using(await CrossThreadLockScope.Enter(m_lock))
{
WeakReference<SynchronizedType> viewRef = null;
SynchronizedType view = null;
if (m_views.TryGetValue(typeID, out viewRef))
{
viewRef.TryGetTarget(out view);
}
if (view != null)
{
return view;
}
view = new SynchronizedType(this, typeID);
await view.Load();
if (viewRef == null)
{
viewRef = new WeakReference<SynchronizedType>(view);
}
else
{
viewRef.SetTarget(view);
}
m_views[typeID] = viewRef;
return view;
}
}
internal RecordItemEditOperation(SynchronizedType sType, IItemDataTyped data, RecordItemLock rLock)
{
m_sType = sType;
m_rLock = rLock;
m_data = data.Item.DeepClone().TypedData;
}
