protected void MergePhase1(Object objectToMerge, Object objectToDelete, ProceedWithMergeHook proceedHook, MergeFinishedCallback mergeFinishedCallback, bool addNewEntitiesToCache)
{
ICUDResult cudResult;
MergeHandle mergeHandle;
IDisposableCache childCache = CacheFactory.Create(CacheFactoryDirective.NoDCE, false, false, "MergeProcess.ORIGINAL");
try
{
mergeHandle = BeanContext.RegisterBean <MergeHandle>() //
.PropertyValue("Cache", childCache) //
.Finish();
cudResult = MergeController.MergeDeep(objectToMerge, mergeHandle);
mergeHandle.Cache = null;
}
finally
{
childCache.Dispose();
childCache = null;
}
if (GuiThreadHelper.IsInGuiThread())
{
MergePhase2(objectToMerge, objectToDelete, mergeHandle, cudResult, proceedHook, mergeFinishedCallback, addNewEntitiesToCache);
}
else
{
GuiThreadHelper.InvokeInGui(delegate()
{
MergePhase2(objectToMerge, objectToDelete, mergeHandle, cudResult, proceedHook, mergeFinishedCallback, addNewEntitiesToCache);
});
}
}
protected void FireQueuedPropertyChangeEvents()
{
List <IBackgroundWorkerDelegate> queuedEvents = queuedEventsTL.Value;
if (queuedEvents == null)
{
return;
}
queuedEventsTL.Value = null;
Log.Info("ICacheModification.FlushInGui()");
GuiThreadHelper.InvokeInGui(delegate()
{
Log.Info("ICacheModification.FlushWithinGui()");
try
{
for (int a = 0, size = queuedEvents.Count; a < size; a++)
{
IBackgroundWorkerDelegate queuedEvent = queuedEvents[a];
queuedEvent();
}
}
catch (Exception e)
{
Log.Error(e);
throw;
}
Log.Info("ICacheModification.FlushWithinGui finished");
});
}
protected virtual void RaisePropertyChanged(String propertyName)
{
GuiThreadHelper.InvokeInGui(delegate()
{
var localEventHandler = PropertyChanged;
if (localEventHandler != null)
{
localEventHandler.Invoke(this, new PropertyChangedEventArgs(propertyName));
}
});
}
protected void ExecuteFirePropertyChange(PropertyChangeSupport propertyChangeSupport, IList <IPropertyChangeExtension> extensions, Object obj, PropertyChangedEventArgs[] evnts, String[] propertyNames, Object[] oldValues, Object[] currentValues)
{
if (AsyncPropertyChangeActive)
{
GuiThreadHelper.InvokeInGui(delegate()
{
ExecuteFirePropertyChangeIntern(propertyChangeSupport, extensions, obj, evnts, propertyNames, oldValues, currentValues);
});
}
else
{
ExecuteFirePropertyChangeIntern(propertyChangeSupport, extensions, obj, evnts, propertyNames, oldValues, currentValues);
}
}
public IBusyToken AcquireBusyToken()
{
BusyToken token = new BusyToken(this);
bool changed;
lock (pendingTokens)
{
pendingTokens.Add(token);
changed = (pendingTokens.Count == 1);
}
GuiThreadHelper.InvokeInGui(delegate()
{
PropertyChanged(this, busyCountPCE);
// Busy flag might evaluate to true
if (changed)
{
PropertyChanged(this, isBusyPCE);
}
});
return(token);
}
public void Finished(IBusyToken busyToken)
{
bool changed;
lock (pendingTokens)
{
if (!pendingTokens.Remove(busyToken))
{
throw new ArgumentException("Token not known");
}
changed = (pendingTokens.Count == 0);
}
GuiThreadHelper.InvokeInGui(delegate()
{
PropertyChanged(this, busyCountPCE);
// Busy flag might evaluate to false
if (changed)
{
PropertyChanged(this, isBusyPCE);
}
});
}
protected virtual void PopulateAsync(GenericViewModel <T> model, IFilterDescriptor filterDescriptor, IList <ISortDescriptor> sortDescriptors, IPagingRequest pagingRequest, Object[] contextInformation, ICache cache, Object localRequest)
{
lock (currentRequestLock)
{
// Early check here, but more important check in the finally-SyncContext.
// We will not update the ViewModel, if this request is not the current request (hence Populate was recalled
// since this request was initiated).
// An example where this is important would be a screen, where the user can enter search criteria and start
// a corresponding search, while the screen is still loading data from a preceeding request. In this case, the
// result of the second search could be retrieved before the first one, leading to wrong data in the screen.
//
// ToDo: Is there a scenario where the same VMDCC is used with multiple VMs or different Caches?
// If so, localRequest and currentRequest must contain the VM and Cache references to compare them!
if (!Object.ReferenceEquals(localRequest, currentRequest))
{
return;
}
}
IList <T> initialEntities = null;
IPagingResponse pagingResponse = null;
try
{
if (hasPagedViewModel)
{
pagingResponse = ((IPagingRefresher <T>)Refresher).Populate(filterDescriptor, sortDescriptors, pagingRequest, contextInformation);
initialEntities = new List <T>();
foreach (Object obj in pagingResponse.Result)
{
initialEntities.Add((T)obj);
}
}
else
{
if (filterDescriptor != null || sortDescriptors != null)
{
contextInformation = new Object[2];
contextInformation[0] = filterDescriptor;
contextInformation[1] = sortDescriptors;
}
initialEntities = ((IRefresher <T>)Refresher).Populate(contextInformation);
}
}
catch (Exception e)
{
if (Log.ErrorEnabled)
{
Log.Error(e);
}
}
finally
{
GuiThreadHelper.InvokeInGui(delegate()
{
lock (currentRequestLock)
{
if (!Object.ReferenceEquals(localRequest, currentRequest))
{
return;
}
}
try
{
if (IsRefreshedDataValid(contextInformation))
{
if (initialEntities != null)
{
if (ToBeCreatedOnTop)
{
// ToBeCreated entities are never part of the initialEntities, so no doublette check necessary
foreach (T entity in model.Objects)
{
if ((entity is IDataObject) && ((IDataObject)entity).ToBeCreated)
{
initialEntities.Insert(0, entity);
}
}
}
model.Clear();
for (int a = 0, size = initialEntities.Count; a < size; a++)
{
T item = initialEntities[a];
model.InsertAt(a, item);
}
}
// Important to update the sorting states (if the provider disables gridviews own sorting mechanism):
if (hasPagedViewModel)
{
UpdatePagingInformation(pagingResponse);
}
UpdateAfterDCE();
}
}
catch (Exception ex)
{
if (Log.ErrorEnabled)
{
Log.Error(ex);
}
}
finally
{
model.IsBusy = false;
}
});
}
}
protected virtual void RevertChangesIntern(IRevertChangesSavepoint savepoint, IList <Object> objectsToRevert, bool globally,
RevertChangesFinishedCallback revertChangesFinishedCallback)
{
// Store the RevertChangesFinishedCallback from this thread on the stack and set the property null (for following calls):
if (objectsToRevert == null || objectsToRevert.Count == 0)
{
if (revertChangesFinishedCallback != null)
{
revertChangesFinishedCallback.Invoke(true);
}
return;
}
if (globally)
{
GuiThreadHelper.InvokeOutOfGui(delegate()
{
bool success = false;
try
{
DataChangeEvent dataChange = new DataChangeEvent();
dataChange.IsLocalSource = true;
dataChange.Inserts = new List <IDataChangeEntry>(0);
dataChange.Updates = new List <IDataChangeEntry>();
dataChange.Deletes = new List <IDataChangeEntry>();
for (int a = objectsToRevert.Count; a-- > 0;)
{
Object objectToRevert = objectsToRevert[a];
IEntityMetaData metaData = ((IEntityMetaDataHolder)objectToRevert).Get__EntityMetaData();
Object id = metaData.IdMember.GetValue(objectToRevert, false);
if (id == null)
{
dataChange.Deletes.Add(new DirectDataChangeEntry(objectToRevert));
continue;
}
dataChange.Updates.Add(new DataChangeEntry(metaData.EntityType, ObjRef.PRIMARY_KEY_INDEX, id, null));
}
EventDispatcher.DispatchEvent(dataChange, DateTime.Now, -1);
success = true;
}
finally
{
if (revertChangesFinishedCallback != null)
{
revertChangesFinishedCallback.Invoke(success);
}
}
});
}
else
{
// Commented the following part from Ambeth 0.130 and use the part from Ambeth 0.129 due to a deadlock in the merge process:
//GuiThreadHelper.InvokeOutOfGui(delegate()
//{
// bool success1 = false;
// try
// {
// IList<IDataChangeEntry> directObjectDeletes = new List<IDataChangeEntry>();
// IList<Object> initializedObjects = MergeController.ScanForInitializedObjects(objectsToRevert, true, null);
// IList<IObjRef> orisToRevert = new List<IObjRef>();
// ISet<Object> persistedObjectsToRevert = new IdentityHashSet<Object>();
// for (int a = initializedObjects.Count; a-- > 0; )
// {
// Object objectToRevert = initializedObjects[a];
// IEntityMetaData metaData = EntityMetaDataProvider.GetMetaData(objectToRevert.GetType());
// Object id = metaData.IdMember.GetValue(objectToRevert, false);
// if (id == null)
// {
// directObjectDeletes.Add(new DirectDataChangeEntry(objectToRevert));
// continue;
// }
// persistedObjectsToRevert.Add(objectToRevert);
// orisToRevert.Add(new ObjRef(metaData.EntityType, ObjRef.PRIMARY_KEY_INDEX, id, null));
// }
// IList<Object> hardRefsToRootCacheValues = RootCache.GetObjects(orisToRevert, CacheDirective.CacheValueResult | CacheDirective.ReturnMisses);
// for (int a = orisToRevert.Count; a-- > 0; )
// {
// if (hardRefsToRootCacheValues[a] == null)
// {
// // Object could not be loaded/retrieved any more. So the ori refers to an invalid object
// // We can not revert invalid objects and currently ignore them. They will raise exceptions if they will
// // be tried to persist in a merge process any time in the future
// orisToRevert.RemoveAt(a);
// }
// }
// // We do nothing with the hardRef-list from the RootCache. It is only necessary to keep track of the instance reference on the stack
// // To prohibit GC any potential WeakReferences in the meantime....
// GuiThreadHelper.InvokeInGuiAndWait(delegate()
// {
// IProcessResumeItem processResumeItem = WaitEventToResume();
// try
// {
// bool oldCacheModificationValue = CacheModification.IsActive;
// CacheModification.IsActive = true;
// bool oldFailEarlyModeActive = AbstractCache<Object>.FailEarlyModeActive;
// AbstractCache<Object>.FailEarlyModeActive = true;
// try
// {
// IList<IWritableCache> firstLevelCaches = FirstLevelCacheManager.SelectFirstLevelCaches();
// IList<Object> hardRefsToRootCacheValuesHere = hardRefsToRootCacheValues;
// foreach (IWritableCache firstLevelCache in firstLevelCaches)
// {
// IList<Object> persistedObjectsInThisCache = firstLevelCache.GetObjects(orisToRevert, CacheDirective.FailEarly);
// for (int a = persistedObjectsInThisCache.Count; a-- > 0; )
// {
// Object persistedObjectInThisCache = persistedObjectsInThisCache[a];
// if (!persistedObjectsToRevert.Contains(persistedObjectInThisCache))
// {
// continue;
// }
// RootCache.ApplyValues(persistedObjectInThisCache, (ICacheIntern)firstLevelCache);
// }
// }
// for (int a = objectsToRevert.Count; a-- > 0; )
// {
// Object objectToRevert = objectsToRevert[a];
// if (objectToRevert is IDataObject)
// {
// // Objects which are specified to be reverted loose their delete flag
// ((IDataObject)objectToRevert).ToBeDeleted = false;
// }
// }
// }
// finally
// {
// AbstractCache<Object>.FailEarlyModeActive = oldFailEarlyModeActive;
// CacheModification.IsActive = oldCacheModificationValue;
// }
// }
// finally
// {
// if (processResumeItem != null)
// {
// processResumeItem.ResumeProcessingFinished();
// processResumeItem = null;
// }
// }
// });
// if (directObjectDeletes.Count > 0)
// {
// DataChangeEvent dataChange = DataChangeEvent.Create(0, 0, 0);
// dataChange.Deletes = directObjectDeletes;
// EventDispatcher.DispatchEvent(dataChange, DateTime.Now, -1);
// }
// success1 = true;
// }
// finally
// {
// if (revertChangesFinishedCallback != null)
// {
// revertChangesFinishedCallback.Invoke(success1);
// }
// }
//});
// Here comes the part from Ambeth 0.129:
GuiThreadHelper.InvokeOutOfGui(delegate()
{
bool success1 = false;
bool?success2 = null;
bool?success3 = null;
try
{
IList <IDataChangeEntry> directObjectDeletes = new List <IDataChangeEntry>();
List <IObjRef> objRefs = new List <IObjRef>();
List <ValueHolderRef> valueHolderKeys = new List <ValueHolderRef>();
IList <Object> initializedObjects = MergeController.ScanForInitializedObjects(objectsToRevert, true, null, objRefs, valueHolderKeys);
IList <IObjRef> orisToRevert = new List <IObjRef>();
ISet <Object> persistedObjectsToRevert = new IdentityHashSet <Object>();
for (int a = initializedObjects.Count; a-- > 0;)
{
Object objectToRevert = initializedObjects[a];
IEntityMetaData metaData = ((IEntityMetaDataHolder)objectToRevert).Get__EntityMetaData();
Object id = metaData.IdMember.GetValue(objectToRevert, false);
if (id == null)
{
directObjectDeletes.Add(new DirectDataChangeEntry(objectToRevert));
continue;
}
persistedObjectsToRevert.Add(objectToRevert);
orisToRevert.Add(new ObjRef(metaData.EntityType, ObjRef.PRIMARY_KEY_INDEX, id, null));
}
IList <Object> hardRefsToRootCacheValues = RootCache.GetObjects(orisToRevert, CacheDirective.CacheValueResult | CacheDirective.ReturnMisses);
for (int a = orisToRevert.Count; a-- > 0;)
{
if (hardRefsToRootCacheValues[a] == null)
{
// Object could not be loaded/retrieved any more. So the ori refers to an invalid object
// We can not revert invalid objects and currently ignore them. They will raise exceptions if they will
// be tried to persist in a merge process any time in the future
orisToRevert.RemoveAt(a);
}
}
// We do nothing with the hardRef-list from the RootCache. It is only necessary to keep track of the instance reference on the stack
// To prohibit GC any potential WeakReferences in the meantime....
success2 = false;
GuiThreadHelper.InvokeInGui(delegate(Object state)
{
WaitEventToResume(delegate(IProcessResumeItem processResumeItem)
{
try
{
bool oldCacheModificationValue = CacheModification.Active;
CacheModification.Active = true;
bool oldFailEarlyModeActive = AbstractCache.FailInCacheHierarchyModeActive;
AbstractCache.FailInCacheHierarchyModeActive = true;
try
{
IList <IWritableCache> firstLevelCaches = FirstLevelCacheManager.SelectFirstLevelCaches();
IList <Object> hardRefsToRootCacheValuesHere = hardRefsToRootCacheValues;
foreach (IWritableCache firstLevelCache in firstLevelCaches)
{
IList <Object> persistedObjectsInThisCache = firstLevelCache.GetObjects(orisToRevert, CacheDirective.FailEarly);
for (int a = persistedObjectsInThisCache.Count; a-- > 0;)
{
Object persistedObjectInThisCache = persistedObjectsInThisCache[a];
if (!persistedObjectsToRevert.Contains(persistedObjectInThisCache))
{
continue;
}
RootCache.ApplyValues(persistedObjectInThisCache, (ICacheIntern)firstLevelCache, null);
}
}
for (int a = objectsToRevert.Count; a-- > 0;)
{
Object objectToRevert = objectsToRevert[a];
if (objectToRevert is IDataObject)
{
// Objects which are specified to be reverted loose their flags
((IDataObject)objectToRevert).ToBeDeleted = false;
}
}
if (directObjectDeletes.Count == 0)
{
success2 = true;
return;
}
}
finally
{
AbstractCache.FailInCacheHierarchyModeActive = oldFailEarlyModeActive;
CacheModification.Active = oldCacheModificationValue;
}
}
finally
{
if (processResumeItem != null)
{
processResumeItem.ResumeProcessingFinished();
}
}
success3 = false;
GuiThreadHelper.InvokeOutOfGui(delegate()
{
try
{
DataChangeEvent dataChange = DataChangeEvent.Create(0, 0, 0);
dataChange.Deletes = directObjectDeletes;
EventDispatcher.DispatchEvent(dataChange, DateTime.Now, -1);
success3 = true;
}
finally
{
if (revertChangesFinishedCallback != null)
{
revertChangesFinishedCallback.Invoke(success3.Value);
}
}
});
success2 = true;
}, delegate(Exception e)
{
if (revertChangesFinishedCallback != null && success3 == null)
{
revertChangesFinishedCallback.Invoke(success2.Value);
}
});
}, null);
success1 = true;
}
finally
{
if (revertChangesFinishedCallback != null && success2 == null && success3 == null)
{
revertChangesFinishedCallback.Invoke(success1);
}
}
});
}
}