private void DoNothing(
ItemMetadata item,
ItemChange change,
SaveChangeContext context,
bool deleted = false,
MegaNodeHelper existingNode = null)
{
// creating
if (item == null)
{
if (existingNode == null)
{
context.RecordRecoverableErrorForItem(new RecoverableErrorData(new Exception()));
}
item = _metadataStore.Metadata.CreateItemMetadata(change.ItemId, change.CreationVersion);
item.ChangeVersion = change.ChangeVersion;
_metadataStore.SaveItemMetadata(item, existingNode.Node.Id, existingNode.Path);
return;
}
if (deleted)
{
item.MarkAsDeleted(change.ChangeVersion);
}
item.ChangeVersion = change.ChangeVersion;
_metadataStore.SaveItemMetadata(item);
}
private void ProcessConstraint(
ItemChange change,
SaveChangeContext context,
MegaStoreConstraintException e,
ItemMetadata item,
MegaNodeHelper conflictingNode)
{
switch (e.ConstraintType)
{
case MegaStoreConstraintType.TargetExists:
ResolveConflict(item, change, context, conflictingNode);
break;
case MegaStoreConstraintType.NoParent:
OnDemandedResync();
context.RecordConstraintConflictForItem(ConstraintConflictReason.NoParent);
break;
// todo add no-free-space handling
case MegaStoreConstraintType.ZeroSize:
context.RecordConstraintConflictForItem(ConstraintConflictReason.Other);
break;
case MegaStoreConstraintType.NotEmpty:
OnDemandedResync();
context.RecordRecoverableErrorForItem(new RecoverableErrorData(e));
break;
}
}
// the node is suddenly out, remove it from database
// (it was a concurrency delete attempt - we should restore the existing version)
private void ForgetItem(SaveChangeContext context, ItemMetadata item, Exception e)
{
_metadataStore.Metadata.RemoveItemMetadata(new List <SyncId> {
item.GlobalId
});
OnDemandedResync();
context.RecordRecoverableErrorForItem(new RecoverableErrorData(e));
}
//Save the item, taking the appropriate action for the 'change' and the data from the item (in 'context')
public void SaveItemChange(SaveChangeAction saveChangeAction, ItemChange change, SaveChangeContext context)
{
ulong timeStamp = 0;
ItemMetadata item = null;
switch (saveChangeAction)
{
case SaveChangeAction.Create:
item = _metadataStore.Metadata.FindItemMetadataById(change.ItemId);
if (item != null)
{
// doubtful solution
_metadataStore.Metadata.RemoveItemMetadata(new List<SyncId> { item.GlobalId });
item = null;
}
CreateItem(change, context);
break;
case SaveChangeAction.UpdateVersionAndData:
case SaveChangeAction.UpdateVersionOnly:
item = _metadataStore.Metadata.FindItemMetadataById(change.ItemId);
if (item == null)
{
CreateItem(change, context);
break;
}
if (saveChangeAction == SaveChangeAction.UpdateVersionOnly)
{
item.ChangeVersion = change.ChangeVersion;
_metadataStore.SaveItemMetadata(item);
}
else { UpdateItem(item, change, context); }
break;
case SaveChangeAction.DeleteAndStoreTombstone:
item = _metadataStore.Metadata.FindItemMetadataById(change.ItemId);
// didn't know about this item
if (item == null)
{
item = _metadataStore.Metadata.CreateItemMetadata(change.ItemId, change.CreationVersion);
item.MarkAsDeleted(change.ChangeVersion);
item.ChangeVersion = change.ChangeVersion;
_metadataStore.SaveItemMetadata(item);
}
else { DeleteItem(item, change, context); }
break;
case SaveChangeAction.UpdateVersionAndMergeData:
item = _metadataStore.Metadata.FindItemMetadataById(change.ItemId);
ResolveConflict(item, change, context, null);
break;
case SaveChangeAction.DeleteAndRemoveTombstone:
item = _metadataStore.Metadata.FindItemMetadataById(change.ItemId);
if (item != null)
{
DeleteItem(item, change, context, true);
}
break;
}
}
/// <summary>
/// UPDATE
/// </summary>
///
private void UpdateItem(ItemMetadata item, ItemChange change, SaveChangeContext context)
{
var data = (IFileDataRetriever)context.ChangeData;
var attr = _metadataStore.GetItemInfo(item);
var stream = data.FileData.IsDirectory ? null : data.FileStream;
try
{
SyncedNodeAttributes updatedNode = null;
//if pathes are different then consider renaming with unchanged content
if (attr.Path != data.FileData.RelativePath)
{
updatedNode = _nodeStore.MoveFile(attr.Path, data.FileData.RelativePath, attr.Id);
OnAppliedChange(ChangeType.Rename, data.FileData.RelativePath, attr.Path);
}
else
{
updatedNode = _nodeStore.UpdateFile(attr.Path, data.FileData, stream, attr.Id);
OnAppliedChange(ChangeType.Update, data.FileData.RelativePath);
}
item.ChangeVersion = change.ChangeVersion;
_metadataStore.SaveItemMetadata(item, updatedNode.Id, updatedNode.Path);
}
catch (MegaStoreConstraintException e)
{
ProcessConstraint(change, context, e, item, e.Node);
}
catch (MegaStoreException e)
{
ForgetItem(context, item, e);
}
catch (MegaApiException e)
{
context.RecordRecoverableErrorForItem(new RecoverableErrorData(e));
OnDemandedResync();
}
catch (DirectoryNotFoundException e)
{
context.RecordRecoverableErrorForItem(new RecoverableErrorData(e));
OnDemandedResync();
}
catch (COMException e)
{
OnDemandedResync();
context.RecordRecoverableErrorForItem(new RecoverableErrorData(e));
}
finally
{
CloseStream(stream);
}
}
private void BackupFile(ItemMetadata item, string path, ItemChange change, SaveChangeContext context)
{
var t = _nodeStore.BackupFile(path);
var newItem = _metadataStore.CreateItemMetadata();
_metadataStore.SaveItemMetadata(newItem, t.Node.Id, t.Path);
if (item == null)
{
CreateItem(change, context);
}
else
{
UpdateItem(item, change, context);
}
}
/// <summary>
/// DELETE
/// </summary>
private void DeleteItem(ItemMetadata item, ItemChange change, SaveChangeContext context, bool removeTombstone = false)
{
try
{
var attr = _metadataStore.GetItemInfo(item);
_nodeStore.DeleteFile(attr.Path, attr.Id);
OnAppliedChange(ChangeType.Delete, null, attr.Path);
if (removeTombstone)
{
_metadataStore.Metadata.RemoveItemMetadata(new List <SyncId> {
item.GlobalId
});
}
else
{
item.MarkAsDeleted(change.ChangeVersion);
_metadataStore.SaveItemMetadata(item);
}
}
catch (MegaStoreConstraintException e)
{
ProcessConstraint(change, context, e, item, null);
}
// never mind, the item isn't found anyway
catch (MegaStoreException)
{
if (removeTombstone)
{
_metadataStore.Metadata.RemoveItemMetadata(new List <SyncId> {
item.GlobalId
});
}
else
{
item.MarkAsDeleted(change.ChangeVersion);
_metadataStore.SaveItemMetadata(item);
}
}
catch (MegaApiException e)
{
context.RecordRecoverableErrorForItem(new RecoverableErrorData(e));
OnDemandedResync();
}
}
/// <summary>
/// CREATE
/// </summary>
private void CreateItem(ItemChange change, SaveChangeContext context, ItemMetadata itemToSaveChanges = null)
{
var data = (IFileDataRetriever)context.ChangeData;
Stream stream = null;
try
{
stream = data.FileData.IsDirectory ? null : data.FileStream;
var createdNode = _nodeStore.InsertNode(data.FileData, data.FileData.RelativePath, stream);
if (itemToSaveChanges == null)
{
itemToSaveChanges = _metadataStore.CreateItemMetadata(change.ItemId, change.CreationVersion);
}
itemToSaveChanges.ChangeVersion = change.ChangeVersion;
_metadataStore.SaveItemMetadata(itemToSaveChanges, createdNode.Id, createdNode.Path);
OnAppliedChange(ChangeType.Create, data.FileData.RelativePath);
}
catch (MegaStoreConstraintException e)
{
ProcessConstraint(change, context, e, null, e.Node);
}
catch (MegaApiException e)
{
context.RecordRecoverableErrorForItem(new RecoverableErrorData(e));
}
catch (DirectoryNotFoundException e)
{
OnDemandedResync();
context.RecordRecoverableErrorForItem(new RecoverableErrorData(e));
}
catch (COMException e)
{
OnDemandedResync();
context.RecordRecoverableErrorForItem(new RecoverableErrorData(e));
}
finally
{
CloseStream(stream);
}
}
public void SaveItemChange(SaveChangeAction saveChangeAction, ItemChange change, SaveChangeContext context)
{
// anyone know how to implement ???
throw new NotImplementedException();
}
public void GetUpdatedKnowledge(SaveChangeContext context)
{
context.GetUpdatedDestinationKnowledge(out myKnowledge, out myForgottenKnowledge);
}
public void SaveItemChange(SaveChangeAction saveChangeAction, ItemChange change, SaveChangeContext context)
{
// anyone know how to implement ???
throw new NotImplementedException();
}
public override void SaveItemChange(SaveChangeAction saveChangeAction, ItemChange change, SaveChangeContext context)
{
// Extract the data from the change
TransferMechanism data = context.ChangeData as TransferMechanism;
// Now apply the change
if (!(saveChangeAction == SaveChangeAction.UpdateVersionOnly) && ((change.ChangeKind & ChangeKind.Deleted) == 0))
{
ItemMetadata item = new ItemMetadata();
item.ItemId = change.ItemId;
item.ChangeVersion = change.ChangeVersion;
item.CreationVersion = change.CreationVersion;
item.Uri = data.Uri;
RemoteFileInfo fileInfo = new RemoteFileInfo();
fileInfo.FolderPath = Path;
fileInfo.Length = data.DataStream.Length;
fileInfo.Metadata = item;
fileInfo.FileByteStream = data.DataStream;
Proxy.UploadFile(fileInfo);
// Close input stream
data.DataStream.Close();
}
else
{
Proxy.DeleteFile(Path, change.ItemId, _filters);
}
// If we made it here, the change was successfully applied locally
// (or it is a version only change), so we can update our knowledge with the
// learned knowledge from the change
context.GetUpdatedDestinationKnowledge(out _syncKnowledge, out _forgottenKnowledge);
}
private void DoNothing(
ItemMetadata item,
ItemChange change,
SaveChangeContext context,
bool deleted = false,
MegaNodeHelper existingNode = null)
{
// creating
if (item == null)
{
if (existingNode == null)
{
context.RecordRecoverableErrorForItem(new RecoverableErrorData(new Exception()));
}
item = _metadataStore.Metadata.CreateItemMetadata(change.ItemId, change.CreationVersion);
item.ChangeVersion = change.ChangeVersion;
_metadataStore.SaveItemMetadata(item, existingNode.Node.Id, existingNode.Path);
return;
}
if (deleted)
{
item.MarkAsDeleted(change.ChangeVersion);
}
item.ChangeVersion = change.ChangeVersion;
_metadataStore.SaveItemMetadata(item);
}
private void BackupFile(ItemMetadata item, string path, ItemChange change, SaveChangeContext context)
{
var t = _nodeStore.BackupFile(path);
var newItem = _metadataStore.CreateItemMetadata();
_metadataStore.SaveItemMetadata(newItem, t.Node.Id, t.Path);
if (item == null)
{
CreateItem(change, context);
}
else
{
UpdateItem(item, change, context);
}
}
//Save the item, taking the appropriate action for the 'change' and the data from the item (in 'context')
public void SaveItemChange(SaveChangeAction saveChangeAction, ItemChange change, SaveChangeContext context)
{
Thread.Sleep(1000);
ulong timeStamp = 0;
ItemMetadata item = null;
ItemData data = null;
change.WorkEstimate = 1;
switch (saveChangeAction)
{
case SaveChangeAction.Create:
//Do duplicate detection here
item = _metadata.FindItemMetadataById(change.ItemId);
if (null != item)
{
throw new Exception("SaveItemChange must not have Create action for existing items.");
}
item = _metadata.CreateItemMetadata(change.ItemId, change.CreationVersion);
item.ChangeVersion = change.ChangeVersion;
data = new ItemData( (ItemData)context.ChangeData);
//We are using the same id for both the local and global item id.
_store.CreateItem( data, change.ItemId.GetGuidId());
SaveItemMetadata(item, _store.Get(change.ItemId.GetGuidId()).TimeStamp);
break;
case SaveChangeAction.UpdateVersionAndData:
case SaveChangeAction.UpdateVersionOnly:
item = _metadata.FindItemMetadataById(change.ItemId);
if (null == item)
{
throw new Exception("Item Not Found in Store!?");
}
item.ChangeVersion = change.ChangeVersion;
if (saveChangeAction == SaveChangeAction.UpdateVersionOnly)
{
SaveItemMetadata(item);
}
else //Also update the data and the timestamp.
{
data = new ItemData((ItemData)context.ChangeData);
timeStamp = _store.UpdateItem(item.GlobalId.GetGuidId(), data);
SaveItemMetadata(item, timeStamp);
}
break;
case SaveChangeAction.DeleteAndStoreTombstone:
item = _metadata.FindItemMetadataById(change.ItemId);
if (null == item)
{
item = _metadata.CreateItemMetadata(change.ItemId, change.CreationVersion);
}
if (change.ChangeKind == ChangeKind.Deleted)
{
item.MarkAsDeleted(change.ChangeVersion);
}
else
{
// This should never happen in Sync Framework V1.0
throw new Exception("Invalid ChangeType");
}
item.ChangeVersion = change.ChangeVersion;
SaveItemMetadata(item, 0); // set timestamp to 0 for tombstones
_store.DeleteItem(item.GlobalId.GetGuidId());
break;
//Merge the changes! (Take the data from the local item + the remote item),noting to update the tick count to propagate the resolution!
case SaveChangeAction.UpdateVersionAndMergeData:
item = _metadata.FindItemMetadataById(change.ItemId);
if (null == item)
{
throw new Exception("Item Not Found in Store!?");
}
if (item.IsDeleted != true)
{
//Note - you must update the change version to propagate the resolution!
item.ChangeVersion = new SyncVersion(0, _metadata.GetNextTickCount());
//Combine the conflicting data...
ItemData mergedData = (_store.Get(item.GlobalId.GetGuidId())).Merge( (ItemData)context.ChangeData);
timeStamp = _store.UpdateItem(item.GlobalId.GetGuidId(), mergedData);
SaveItemMetadata(item, timeStamp);
}
break;
case SaveChangeAction.DeleteAndRemoveTombstone:
item = _metadata.FindItemMetadataById(change.ItemId);
if (item != null)
{
List<SyncId> ids = new List<SyncId>();
ids.Add(item.GlobalId);
_metadata.RemoveItemMetadata(ids);
}
_store.DeleteItem(change.ItemId.GetGuidId());
break;
}
}
private void UploadBack(ItemMetadata item, ItemChange change, SaveChangeContext context)
{
//TODO this still re-downloads the file just uploaded
item.ResurrectDeletedItem();
CreateItem(change, context, item);
}
/// <summary>
/// CONFLICT
/// </summary>
private void ResolveConflict(ItemMetadata item, ItemChange change, SaveChangeContext context, MegaNodeHelper conflictingNode)
{
var data = (IFileDataRetriever)context.ChangeData;
// item does not exist in metadata (can happen when create+create)
if (item == null)
{
if (conflictingNode == null)
{
context.RecordRecoverableErrorForItem(new RecoverableErrorData(new Exception()));
}
if (FilesAreEqual(data, conflictingNode))
{
DoNothing(item, change, context, false, conflictingNode);
}
else
{
BackupFile(item, conflictingNode.Path, change, context);
}
return;
}
var attr = _metadataStore.GetItemInfo(item);
try
{
if (change.ChangeKind == ChangeKind.Deleted)
{
// local delete + remote delete
if (item.IsDeleted)
{
DoNothing(item, change, context, true);
}
// local delete + remote update
else
{
DownloadBack(item, change);
}
}
else
{
// local update + remote delete
if (item.IsDeleted)
{
UploadBack(item, change, context);
}
// update + update
else
{
if (FilesAreEqual(data, _nodeStore.FindNodeById(attr.Id)))
{
DoNothing(item, change, context);
}
else
{
BackupFile(item, attr.Path, change, context);
}
}
}
}
catch (MegaApiException e)
{
context.RecordRecoverableErrorForItem(new RecoverableErrorData(e));
}
}
/// <summary>
/// DELETE
/// </summary>
private void DeleteItem(ItemMetadata item, ItemChange change, SaveChangeContext context, bool removeTombstone = false)
{
try
{
var attr = _metadataStore.GetItemInfo(item);
_nodeStore.DeleteFile(attr.Path, attr.Id);
OnAppliedChange(ChangeType.Delete, null, attr.Path);
if (removeTombstone)
{
_metadataStore.Metadata.RemoveItemMetadata(new List<SyncId> { item.GlobalId });
}
else
{
item.MarkAsDeleted(change.ChangeVersion);
_metadataStore.SaveItemMetadata(item);
}
}
catch (MegaStoreConstraintException e)
{
ProcessConstraint(change, context, e, item, null);
}
// never mind, the item isn't found anyway
catch (MegaStoreException)
{
if (removeTombstone)
{
_metadataStore.Metadata.RemoveItemMetadata(new List<SyncId> { item.GlobalId });
}
else
{
item.MarkAsDeleted(change.ChangeVersion);
_metadataStore.SaveItemMetadata(item);
}
}
catch (MegaApiException e)
{
context.RecordRecoverableErrorForItem(new RecoverableErrorData(e));
OnDemandedResync();
}
}
/// <summary>
/// CONFLICT
/// </summary>
private void ResolveConflict(ItemMetadata item, ItemChange change, SaveChangeContext context, MegaNodeHelper conflictingNode)
{
var data = (IFileDataRetriever)context.ChangeData;
// item does not exist in metadata (can happen when create+create)
if (item == null)
{
if (conflictingNode == null)
{
context.RecordRecoverableErrorForItem(new RecoverableErrorData(new Exception()));
}
if (FilesAreEqual(data, conflictingNode))
{
DoNothing(item, change, context, false, conflictingNode);
}
else
{
BackupFile(item, conflictingNode.Path, change, context);
}
return;
}
var attr = _metadataStore.GetItemInfo(item);
try
{
if (change.ChangeKind == ChangeKind.Deleted)
{
// local delete + remote delete
if (item.IsDeleted)
{
DoNothing(item, change, context, true);
}
// local delete + remote update
else
{
DownloadBack(item, change);
}
}
else
{
// local update + remote delete
if (item.IsDeleted)
{
UploadBack(item, change, context);
}
// update + update
else
{
if (FilesAreEqual(data, _nodeStore.FindNodeById(attr.Id)))
{
DoNothing(item, change, context);
}
else
{
BackupFile(item, attr.Path, change, context);
}
}
}
}
catch (MegaApiException e)
{
context.RecordRecoverableErrorForItem(new RecoverableErrorData(e));
}
}
//Save the item, taking the appropriate action for the 'change' and the data from the item (in 'context')
public void SaveItemChange(SaveChangeAction saveChangeAction, ItemChange change, SaveChangeContext context)
{
ulong timeStamp = 0;
ItemMetadata item = null;
switch (saveChangeAction)
{
case SaveChangeAction.Create:
item = _metadataStore.Metadata.FindItemMetadataById(change.ItemId);
if (item != null)
{
// doubtful solution
_metadataStore.Metadata.RemoveItemMetadata(new List <SyncId> {
item.GlobalId
});
item = null;
}
CreateItem(change, context);
break;
case SaveChangeAction.UpdateVersionAndData:
case SaveChangeAction.UpdateVersionOnly:
item = _metadataStore.Metadata.FindItemMetadataById(change.ItemId);
if (item == null)
{
CreateItem(change, context);
break;
}
if (saveChangeAction == SaveChangeAction.UpdateVersionOnly)
{
item.ChangeVersion = change.ChangeVersion;
_metadataStore.SaveItemMetadata(item);
}
else
{
UpdateItem(item, change, context);
}
break;
case SaveChangeAction.DeleteAndStoreTombstone:
item = _metadataStore.Metadata.FindItemMetadataById(change.ItemId);
// didn't know about this item
if (item == null)
{
item = _metadataStore.Metadata.CreateItemMetadata(change.ItemId, change.CreationVersion);
item.MarkAsDeleted(change.ChangeVersion);
item.ChangeVersion = change.ChangeVersion;
_metadataStore.SaveItemMetadata(item);
}
else
{
DeleteItem(item, change, context);
}
break;
case SaveChangeAction.UpdateVersionAndMergeData:
item = _metadataStore.Metadata.FindItemMetadataById(change.ItemId);
ResolveConflict(item, change, context, null);
break;
case SaveChangeAction.DeleteAndRemoveTombstone:
item = _metadataStore.Metadata.FindItemMetadataById(change.ItemId);
if (item != null)
{
DeleteItem(item, change, context, true);
}
break;
}
}
private void UploadBack(ItemMetadata item, ItemChange change, SaveChangeContext context)
{
//TODO this still re-downloads the file just uploaded
item.ResurrectDeletedItem();
CreateItem(change, context, item);
}
public override void SaveItemChange(SaveChangeAction saveChangeAction, ItemChange change, SaveChangeContext context)
{
// Extract the data from the change
TransferMechanism data = context.ChangeData as TransferMechanism;
// Item metadata
ItemMetadata item = _sync.GetItemMetaData(saveChangeAction, change, data);
// Now apply the change
if (!(saveChangeAction == SaveChangeAction.UpdateVersionOnly) && ((change.ChangeKind & ChangeKind.Deleted) == 0))
{
// Only copy if destination file name is known
// (May have been lost if loser of name collision)
if (item.Uri != String.Empty)
{
FileInfo fi = new FileInfo(System.IO.Path.Combine(Path, item.Uri));
if (!fi.Directory.Exists)
{
fi.Directory.Create();
}
// Change should have stream data, so copy the file data to the local store
using (FileStream outputStream = new FileStream(System.IO.Path.Combine(Path, item.Uri), FileMode.OpenOrCreate)) {
const int copyBlockSize = 4096;
byte[] buffer = new byte[copyBlockSize];
int bytesRead;
// Simple block-by-block copy
while ((bytesRead = data.DataStream.Read(buffer, 0, copyBlockSize)) > 0)
{
outputStream.Write(buffer, 0, bytesRead);
}
// Truncate if needed
outputStream.SetLength(outputStream.Position);
}
// Update the last write time from the updated file to the metadata entry
item.LastWriteTimeUtc = fi.LastWriteTimeUtc;
}
// Close input stream
data.DataStream.Close();
}
else
{
// Not an update/create, so must be a delete or version only change
// Is it a delete?...
if (item.IsTombstone && item.Uri != String.Empty)
{
// Change is a delete
File.Delete(System.IO.Path.Combine(Path, item.Uri));
}
}
// If we made it here, the change was successfully applied locally
// (or it is a version only change), so we can update our knowledge with the
// learned knowledge from the change
_sync.GetUpdatedKnowledge(context);
}
private void ProcessConstraint(
ItemChange change,
SaveChangeContext context,
MegaStoreConstraintException e,
ItemMetadata item,
MegaNodeHelper conflictingNode)
{
switch (e.ConstraintType)
{
case MegaStoreConstraintType.TargetExists:
ResolveConflict(item, change, context, conflictingNode);
break;
case MegaStoreConstraintType.NoParent:
OnDemandedResync();
context.RecordConstraintConflictForItem(ConstraintConflictReason.NoParent);
break;
// todo add no-free-space handling
case MegaStoreConstraintType.ZeroSize:
context.RecordConstraintConflictForItem(ConstraintConflictReason.Other);
break;
case MegaStoreConstraintType.NotEmpty:
OnDemandedResync();
context.RecordRecoverableErrorForItem(new RecoverableErrorData(e));
break;
}
}
/// <summary>
/// Download Mechanism
/// </summary>
/// <param name="saveChangeAction"></param>
/// <param name="change"></param>
/// <param name="context"></param>
public void SaveItemChange(SaveChangeAction saveChangeAction, ItemChange change, SaveChangeContext context)
{
DataTransfer data = context.ChangeData as DataTransfer;
ItemMetadata item = sync.GetItemMetaData(saveChangeAction, change, data);
switch (saveChangeAction)
{
case SaveChangeAction.Create:
{
System.Diagnostics.Debug.WriteLine("Create File: " + item.Uri);
UpdateOrCreateFile(data, item);
break;
}
case SaveChangeAction.UpdateVersionAndData:
{
System.Diagnostics.Debug.WriteLine("UpdateVersion And Data File: " + item.Uri);
UpdateOrCreateFile(data, item);
break;
}
case SaveChangeAction.DeleteAndStoreTombstone:
{
System.Diagnostics.Debug.WriteLine(" Delete File: " + item.Uri);
File.Delete(Path.Combine(folderPath, item.Uri));
break;
}
default:
{
throw new NotImplementedException(saveChangeAction + " ChangeAction is not implemented!");
}
}
sync.GetUpdatedKnowledge(context);
}
// the node is suddenly out, remove it from database
// (it was a concurrency delete attempt - we should restore the existing version)
private void ForgetItem(SaveChangeContext context, ItemMetadata item, Exception e)
{
_metadataStore.Metadata.RemoveItemMetadata(new List<SyncId> { item.GlobalId });
OnDemandedResync();
context.RecordRecoverableErrorForItem(new RecoverableErrorData(e));
}
public void GetUpdatedKnowledge(SaveChangeContext context)
{
context.GetUpdatedDestinationKnowledge(out _syncKnowledge, out _forgottenKnowledge);
}
public void SaveItemChange(SaveChangeAction saveChangeAction, ItemChange change, SaveChangeContext context)
{
ItemMetadata item = null;
T data = default(T);
try
{
switch (saveChangeAction)
{
case SaveChangeAction.Create:
try
{
//Do duplicate detection here
item = _metaData.FindItemMetadataById(change.ItemId);
if (item != null)
{
throw new SyncProviderException("SaveItemChange must not have Create action for existing items.");
}
item = _metaData.CreateItemMetadata(change.ItemId, change.CreationVersion);
item.ChangeVersion = change.ChangeVersion;
data = ConvertFromTransferData(context.ChangeData);
CreateDataItem(change, item, data);
SaveItemMetadata(item);
}
catch (Exception e)
{
throw new SyncProviderException(e, SaveChangeAction.Create);
}
break;
case SaveChangeAction.UpdateVersionAndData:
case SaveChangeAction.UpdateVersionOnly:
try
{
item = _metaData.FindItemMetadataById(change.ItemId);
if (null == item)
{
throw new SyncProviderException("Item Not Found in Store!?");
}
item.ChangeVersion = change.ChangeVersion;
if (saveChangeAction == SaveChangeAction.UpdateVersionOnly)
{
SaveItemMetadata(item);
}
else //Also update the data.
{
data = ConvertFromTransferData(context.ChangeData);
UpdateDataItem(change, item, data);
SaveItemMetadata(item);
}
}
catch (Exception e)
{
throw new SyncProviderException(e, SaveChangeAction.UpdateVersionAndData);
}
break;
case SaveChangeAction.DeleteAndStoreTombstone:
try
{
item = _metaData.FindItemMetadataById(change.ItemId);
if (null == item)
{
item = _metaData.CreateItemMetadata(change.ItemId, change.CreationVersion);
}
if (change.ChangeKind == ChangeKind.Deleted)
{
item.MarkAsDeleted(change.ChangeVersion);
}
else
{
// This should never happen in Sync Framework V1.0
throw new SyncProviderException("Invalid ChangeType");
}
item.ChangeVersion = change.ChangeVersion;
SaveItemMetadata(item);
DeleteDataItem(change, item, data); //item.GlobalId.GetGuidId());
}
catch (Exception e)
{
throw new SyncProviderException(e, SaveChangeAction.DeleteAndStoreTombstone);
}
break;
//Merge the changes! (Take the data from the local item + the remote item),noting to update the tick count to propagate the resolution!
case SaveChangeAction.UpdateVersionAndMergeData:
try
{
item = _metaData.FindItemMetadataById(change.ItemId);
if (null == item)
{
throw new SyncProviderException("Item Not Found in Store!?");
}
if (item.IsDeleted != true)
{
//Note - you must update the change version to propagate the resolution!
item.ChangeVersion = new SyncVersion(0, _metaData.GetNextTickCount());
//Combine the conflicting data...
T dataItem = GetDataItem(item);
if (dataItem == null)
{
throw new SyncProviderException("data item not found for merge");
}
data = ConvertFromTransferData(context.ChangeData);
data = MergeDataItem(dataItem, data);
UpdateDataItem(change, item, data);
SaveItemMetadata(item);
}
}
catch (Exception e)
{
throw new SyncProviderException(e, SaveChangeAction.UpdateVersionAndMergeData);
}
break;
case SaveChangeAction.DeleteAndRemoveTombstone:
try
{
item = _metaData.FindItemMetadataById(change.ItemId);
if (item != null)
{
_metaData.RemoveItemMetadata(new SyncId[] { item.GlobalId });
}
data = ConvertFromTransferData(context.ChangeData);
DeleteDataItem(change, item, data);
}
catch (Exception e)
{
throw new SyncProviderException(e, SaveChangeAction.DeleteAndRemoveTombstone);
}
break;
}
}
catch (SyncProviderException e)
{
Exception exception = e.InnerException != null ? e.InnerException : e;
string itemDescr = e.SaveChangeAction.ToString();
string errDescr = e.Message + "[" + e.InnerException != null?e.InnerException.ToString()
: string.Empty + "]";
RecoverableErrorData recoverableError = new RecoverableErrorData(exception, itemDescr, errDescr);
context.RecordRecoverableErrorForItem(recoverableError);
}
}
public abstract void SaveItemChange(SaveChangeAction saveChangeAction, ItemChange change, SaveChangeContext context);
public void SaveItemChange(SaveChangeAction saveChangeAction, ItemChange change, SaveChangeContext context)
{
DataTransfer data = context.ChangeData as DataTransfer;
switch (saveChangeAction)
{
case SaveChangeAction.Create:
{
ItemMetadata item = new ItemMetadata();
item.ItemId = change.ItemId;
item.ChangeVersion = change.ChangeVersion;
item.CreationVersion = change.CreationVersion;
item.Uri = data.Uri;
data.DataStream.Position = 0;
System.Diagnostics.Debug.WriteLine("Uploading File:" + item.Uri);
service.UploadFile(data.DataStream.Length, item, data.DataStream);
data.DataStream.Close();
sync.UpdateItemItem(item);
break;
}
case SaveChangeAction.DeleteAndStoreTombstone:
{
ItemMetadata item = sync.GetItemMetaData(saveChangeAction, change, data);
sync.DeleteItem(change.ItemId);
service.DeleteFile(change.ItemId, item.Uri);
break;
}
default:
{
throw new NotImplementedException(saveChangeAction + " ChangeAction is not implemented!");
}
}
context.GetUpdatedDestinationKnowledge(out myKnowledge, out myForgottenKnowledge);
}
/// <summary>
/// CREATE
/// </summary>
private void CreateItem(ItemChange change, SaveChangeContext context, ItemMetadata itemToSaveChanges = null)
{
var data = (IFileDataRetriever)context.ChangeData;
Stream stream = null;
try
{
stream = data.FileData.IsDirectory ? null : data.FileStream;
var createdNode = _nodeStore.InsertNode(data.FileData, data.FileData.RelativePath, stream);
if (itemToSaveChanges == null)
{
itemToSaveChanges = _metadataStore.CreateItemMetadata(change.ItemId, change.CreationVersion);
}
itemToSaveChanges.ChangeVersion = change.ChangeVersion;
_metadataStore.SaveItemMetadata(itemToSaveChanges, createdNode.Id, createdNode.Path);
OnAppliedChange(ChangeType.Create, data.FileData.RelativePath);
}
catch (MegaStoreConstraintException e)
{
ProcessConstraint(change, context, e, null, e.Node);
}
catch (MegaApiException e)
{
context.RecordRecoverableErrorForItem(new RecoverableErrorData(e));
}
catch (DirectoryNotFoundException e)
{
OnDemandedResync();
context.RecordRecoverableErrorForItem(new RecoverableErrorData(e));
}
catch (COMException e)
{
OnDemandedResync();
context.RecordRecoverableErrorForItem(new RecoverableErrorData(e));
}
finally
{
CloseStream(stream);
}
}
//Save the item, taking the appropriate action for the 'change' and the data from the item (in 'context')
public void SaveItemChange(SaveChangeAction saveChangeAction, ItemChange change, SaveChangeContext context)
{
Thread.Sleep(1000);
ulong timeStamp = 0;
ItemMetadata item = null;
ItemData data = null;
change.WorkEstimate = 1;
switch (saveChangeAction)
{
case SaveChangeAction.Create:
//Do duplicate detection here
item = _metadata.FindItemMetadataById(change.ItemId);
if (null != item)
{
throw new Exception("SaveItemChange must not have Create action for existing items.");
}
item = _metadata.CreateItemMetadata(change.ItemId, change.CreationVersion);
item.ChangeVersion = change.ChangeVersion;
data = new ItemData((ItemData)context.ChangeData);
//We are using the same id for both the local and global item id.
_store.CreateItem(data, change.ItemId.GetGuidId());
SaveItemMetadata(item, _store.Get(change.ItemId.GetGuidId()).TimeStamp);
break;
case SaveChangeAction.UpdateVersionAndData:
case SaveChangeAction.UpdateVersionOnly:
item = _metadata.FindItemMetadataById(change.ItemId);
if (null == item)
{
throw new Exception("Item Not Found in Store!?");
}
item.ChangeVersion = change.ChangeVersion;
if (saveChangeAction == SaveChangeAction.UpdateVersionOnly)
{
SaveItemMetadata(item);
}
else //Also update the data and the timestamp.
{
data = new ItemData((ItemData)context.ChangeData);
timeStamp = _store.UpdateItem(item.GlobalId.GetGuidId(), data);
SaveItemMetadata(item, timeStamp);
}
break;
case SaveChangeAction.DeleteAndStoreTombstone:
item = _metadata.FindItemMetadataById(change.ItemId);
if (null == item)
{
item = _metadata.CreateItemMetadata(change.ItemId, change.CreationVersion);
}
if (change.ChangeKind == ChangeKind.Deleted)
{
item.MarkAsDeleted(change.ChangeVersion);
}
else
{
// This should never happen in Sync Framework V1.0
throw new Exception("Invalid ChangeType");
}
item.ChangeVersion = change.ChangeVersion;
SaveItemMetadata(item, 0); // set timestamp to 0 for tombstones
_store.DeleteItem(item.GlobalId.GetGuidId());
break;
//Merge the changes! (Take the data from the local item + the remote item),noting to update the tick count to propagate the resolution!
case SaveChangeAction.UpdateVersionAndMergeData:
item = _metadata.FindItemMetadataById(change.ItemId);
if (null == item)
{
throw new Exception("Item Not Found in Store!?");
}
if (item.IsDeleted != true)
{
//Note - you must update the change version to propagate the resolution!
item.ChangeVersion = new SyncVersion(0, _metadata.GetNextTickCount());
//Combine the conflicting data...
ItemData mergedData = (_store.Get(item.GlobalId.GetGuidId())).Merge((ItemData)context.ChangeData);
timeStamp = _store.UpdateItem(item.GlobalId.GetGuidId(), mergedData);
SaveItemMetadata(item, timeStamp);
}
break;
case SaveChangeAction.DeleteAndRemoveTombstone:
item = _metadata.FindItemMetadataById(change.ItemId);
if (item != null)
{
List <SyncId> ids = new List <SyncId>();
ids.Add(item.GlobalId);
_metadata.RemoveItemMetadata(ids);
}
_store.DeleteItem(change.ItemId.GetGuidId());
break;
}
}
/// <summary>
/// UPDATE
/// </summary>
///
private void UpdateItem(ItemMetadata item, ItemChange change, SaveChangeContext context)
{
var data = (IFileDataRetriever)context.ChangeData;
var attr = _metadataStore.GetItemInfo(item);
var stream = data.FileData.IsDirectory ? null : data.FileStream;
try
{
SyncedNodeAttributes updatedNode = null;
//if pathes are different then consider renaming with unchanged content
if (attr.Path != data.FileData.RelativePath)
{
updatedNode = _nodeStore.MoveFile(attr.Path, data.FileData.RelativePath, attr.Id);
OnAppliedChange(ChangeType.Rename, data.FileData.RelativePath, attr.Path);
}
else
{
updatedNode = _nodeStore.UpdateFile(attr.Path, data.FileData, stream, attr.Id);
OnAppliedChange(ChangeType.Update, data.FileData.RelativePath);
}
item.ChangeVersion = change.ChangeVersion;
_metadataStore.SaveItemMetadata(item, updatedNode.Id, updatedNode.Path);
}
catch (MegaStoreConstraintException e)
{
ProcessConstraint(change, context, e, item, e.Node);
}
catch (MegaStoreException e)
{
ForgetItem(context, item, e);
}
catch (MegaApiException e)
{
context.RecordRecoverableErrorForItem(new RecoverableErrorData(e));
OnDemandedResync();
}
catch (DirectoryNotFoundException e)
{
context.RecordRecoverableErrorForItem(new RecoverableErrorData(e));
OnDemandedResync();
}
catch (COMException e)
{
OnDemandedResync();
context.RecordRecoverableErrorForItem(new RecoverableErrorData(e));
}
finally
{
CloseStream(stream);
}
}
protected override void AfterSaveChanges(SaveChangeContext context)
{
this.GetService <IEFCacheServiceProvider>()
.InvalidateCacheDependencies(context.ChangedEntityNames.ToArray());
}
public void SaveItemChange(SaveChangeAction saveChangeAction, ItemChange change, SaveChangeContext context)
{
try
{
UInt64 timeStamp = 0;
ItemMetadata item = null;
ISyncDataObject data = null;
switch (saveChangeAction)
{
case SaveChangeAction.Create:
//Do duplicate detection here
item = _metadata.FindItemMetadataById(change.ItemId);
if (null != item)
{
throw new SyncException("SaveItemChange must not have Create action for existing items.");
}
item = _metadata.CreateItemMetadata(change.ItemId, change.CreationVersion);
item.ChangeVersion = change.ChangeVersion;
data = (ISyncDataObject)context.ChangeData;
//We are using the same id for both the local and global item id.
var version = _syncContext.CreateItem(data, change.ItemId.GetGuidId(), CompanyId, StoreId);
if (version != null)
{
timeStamp = BitConverter.ToUInt64(version, 0);
SaveItemMetadata(item, timeStamp);
}
break;
case SaveChangeAction.UpdateVersionAndData:
case SaveChangeAction.UpdateVersionOnly:
item = _metadata.FindItemMetadataById(change.ItemId);
if (null == item)
{
throw new SyncException("Item Not Found in Store!?");
}
item.ChangeVersion = change.ChangeVersion;
if (saveChangeAction == SaveChangeAction.UpdateVersionOnly)
{
SaveItemMetadata(item);
}
else //Also update the data and the timestamp.
{
data = (ISyncDataObject)context.ChangeData;
timeStamp = BitConverter.ToUInt64(_syncContext.UpdateItem(item.GlobalId.GetGuidId(), data, CompanyId, StoreId), 0);
SaveItemMetadata(item, timeStamp);
}
break;
case SaveChangeAction.DeleteAndStoreTombstone:
item = _metadata.FindItemMetadataById(change.ItemId);
if (null == item)
{
// item = _metadata.CreateItemMetadata(change.ItemId, change.CreationVersion);
return;
}
if (change.ChangeKind == ChangeKind.Deleted)
{
item.MarkAsDeleted(change.ChangeVersion);
}
else
{
// This should never happen in Sync Framework V1.0
throw new SyncException("Invalid ChangeType");
}
item.ChangeVersion = change.ChangeVersion;
SaveItemMetadata(item, timeStamp); // set timestamp to 0 for tombstones
_syncContext.DeleteItem(item.GlobalId.GetGuidId(), CompanyId, StoreId);
break;
//Merge the changes! (Take the data from the local item + the remote item),noting to update the tick count to propagate the resolution!
case SaveChangeAction.UpdateVersionAndMergeData:
item = _metadata.FindItemMetadataById(change.ItemId);
if (null == item)
{
throw new SyncException("Item Not Found in Store!?");
}
if (item.IsDeleted != true)
{
//Note - you must update the change version to propagate the resolution!
item.ChangeVersion = new SyncVersion(0, _metadata.GetNextTickCount());
//Combine the conflicting data...
ISyncDataObject mergedData = _syncContext.Merge(_syncContext.GetItem(item.GlobalId.GetGuidId(), CompanyId, StoreId), (ISyncDataObject)context.ChangeData, CompanyId, StoreId);
timeStamp = BitConverter.ToUInt64(_syncContext.UpdateItem(item.GlobalId.GetGuidId(), mergedData, CompanyId, StoreId), 0);
SaveItemMetadata(item, timeStamp);
}
break;
case SaveChangeAction.DeleteAndRemoveTombstone:
item = _metadata.FindItemMetadataById(change.ItemId);
if (item != null)
{
List <SyncId> ids = new List <SyncId>();
ids.Add(item.GlobalId);
_metadata.RemoveItemMetadata(ids);
}
_syncContext.DeleteItem(change.ItemId.GetGuidId(), CompanyId, StoreId);
break;
}
}
catch (SyncException ex)
{
ILog logger = LogManager.GetLogger(Assembly.GetExecutingAssembly().GetName().Name);
logger.Error(ex.Message, ex);
//do Log
}
catch (DbEntityValidationException ex)
{
ILog logger = LogManager.GetLogger(Assembly.GetExecutingAssembly().GetName().Name);
logger.Error(ex.Message, ex);
//do Log
}
catch (Exception ex)
{
ILog logger = LogManager.GetLogger(Assembly.GetExecutingAssembly().GetName().Name);
logger.Error(ex.Message, ex);
//do Log
}
}
