/// <summary>
/// Initializes a new instance of the <see cref="PackageLoadingErrorArgs"/> class.
/// </summary>
/// <param name="context">The context.</param>
/// <param name="errorString"></param>
public PackageLoadingErrorArgs(LoadPackageContext context, string errorString)
{
ErrorString = errorString;
Package = context.Package;
Worker = context.Worker;
ApplicationObjectSpace = context.ObjectSpace;
CurrentNodeId = context.CurrentNodeId;
}
/// <summary>
/// Verify package the is valid.
/// </summary>
/// <param name="context">The context.</param>
/// <param name="senderNode">The sender node.</param>
/// <returns></returns>
private bool packageIsValid(LoadPackageContext context, ReplicationNode senderNode)
{
var packageIsValid = true;
var errors = new List <string>();
if (!Owner.AnonymousPackagesAllowed && senderNode == null)
{
packageIsValid = false;
var errorText = string.Format(Localizer.SenderNodeIsNotFound,
context.Package.SenderNodeId, context.Package);
context.Worker.ReportError(errorText);
errors.Add(errorText);
}
var expectedPackageId = 1;
if (senderNode != null)
{
switch (context.Package.PackageType)
{
case PackageType.Protocol:
expectedPackageId = senderNode.LastLoadedPackageNumber + 1;
break;
case PackageType.Snapshot:
expectedPackageId = senderNode.LastLoadedSnapshotNumber + 1;
break;
}
}
if (context.Package.PackageId != expectedPackageId)
{
packageIsValid = false;
var errorText = string.Format(Localizer.InvalidPackageId,
context.Package, context.Package.PackageId, expectedPackageId);
context.Worker.ReportError(errorText);
errors.Add(errorText);
}
if (context.Package.PackageData == null || context.Package.PackageData.Length == 0)
{
packageIsValid = false;
var errorText = string.Format(Localizer.PackageDataIsEmpty, context.Package);
context.Worker.ReportError(errorText);
errors.Add(errorText);
}
if (!packageIsValid)
{
var errorString = string.Join("\n", errors.ToArray());
context.Package.CreateLogRecord(PackageEventType.Rejected, errorString);
}
return(packageIsValid);
}
public SnapshotLoadContext(LoadPackageContext context, IEnumerable <SnapshotOidMap> sourceMaps)
: base(context.Package, context.Worker, context.ObjectSpace, context.CurrentNodeId)
{
Maps = new Dictionary <object, SnapshotOidMap>();
RestoredObjects = new List <object>();
UpdatedMapping = new List <object>();
var sourceList = sourceMaps.ToList();
// fixReplicaDictionary(context, sourceList);
sourceList.ForEach(x => Maps.Add(x.Target.Target, x));
}
/// <summary>
/// Loads the snapshot package.
/// </summary>
/// <param name="context">The context.</param>
/// <returns></returns>
public string LoadSnapshotPackage(LoadPackageContext context)
{
var result = string.Empty;
try
{
using (var snapshotObjectSpace = new ObjectSpace(context.Package.UnitOfWork))
{
// create root context
var sourceMaps = snapshotObjectSpace.GetObjects <SnapshotOidMap>();
var rootContext = new SnapshotLoadContext(context, sourceMaps);
context.Worker.ReportProgress(string.Format(Localizer.ObjectsFoundInSnapshot, sourceMaps.Count));
// restore all of object from snapshot
foreach (var sourceMap in sourceMaps)
{
loadSnapshotObject(rootContext, sourceMap);
}
// fix OidMap references
var newMaps = from c in context.ObjectSpace.ModifiedObjects.Cast <object>()
where c is OidMap && ((OidMap)c).NewObject != null
select c as OidMap;
context.ObjectSpace.CommitChanges();
newMaps.ToList().ForEach(x => x.FixReference());
snapshotPostLoad(context.ObjectSpace);
restoreLastLoadedNum(context, snapshotObjectSpace);
context.ObjectSpace.CommitChanges();
snapshotObjectSpace.Rollback();
}
}
catch (Exception exception)
{
result = string.Format(Localizer.SnapshotLoadingIsFailed, exception.Message);
context.Worker.ReportError(result);
}
if (string.IsNullOrEmpty(result))
{
if (context.Worker.CancellationPending)
{
result = Localizer.LoadingAborted;
}
context.Worker.ReportProgress(Color.Blue, Localizer.SnapshotLoadingIs,
(context.Worker.CancellationPending ? Localizer.Aborted : Localizer.Finished));
}
return(result);
}
/// <summary>
/// Restore the last loaded number from marker.
/// </summary>
/// <param name="context">The context.</param>
/// <param name="snapshotObjectSpace">The snapshot object space.</param>
private static void restoreLastLoadedNum(LoadPackageContext context, IObjectSpace snapshotObjectSpace)
{
var marker = PackageMarker.GetInstance(snapshotObjectSpace);
if (marker == null)
{
return;
}
var sender = ReplicationNode.FindNode(context.ObjectSpace, marker.SenderNodeId);
if (sender != null)
{
sender.LastLoadedPackageNumber = marker.LastSavedPackageNumber;
}
}
/// <summary>
/// Initializes a new instance of the <see cref="InvalidPackageArgs"/> class.
/// </summary>
/// <param name="context">The context.</param>
public InvalidPackageArgs(LoadPackageContext context)
{
ApplicationObjectSpace = context.ObjectSpace;
Package = context.Package;
}
/// <summary>
/// Loads the package.
/// </summary>
/// <param name="context">The load package params.</param>
public bool LoadPackage(LoadPackageContext context)
{
// prevent loading self packages
if (context.Package.SenderNodeId == context.CurrentNodeId)
{
return(false);
}
// don't load packages builded before last loaded snapshot
var lastLoadedSnapshotDateTime = (from c in context.ObjectSpace.GetObjects <ReplicationNode>() select c.InitDateTime).Max();
if (context.Package.PackageDateTime < lastLoadedSnapshotDateTime)
{
return(true);
}
var senderNode = ReplicationNode.FindNode(context.ObjectSpace, context.Package.SenderNodeId);
context.Worker.ReportProgress(string.Format(Localizer.LoadingPackage, context.Package));
var loadResult = false;
if (packageIsValid(context, senderNode))
{
Owner.DoBeforeLoadPackage(new LoadPackageEventArgs(context.Package));
context.Package.CreateLogRecord(PackageEventType.Loading, "");
var errorString = "";
switch (context.Package.PackageType)
{
case PackageType.Protocol:
errorString = Owner.ProtocolReplicationService.LoadProtocolPackage(context);
break;
case PackageType.Snapshot:
errorString = Owner.SnapshotService.LoadSnapshotPackage(context);
break;
}
loadResult = string.IsNullOrEmpty(errorString);
// rollback changes on error or abort
if (!loadResult)
{
Owner.DoPackageLoadingError(new PackageLoadingErrorArgs(context, errorString));
context.ObjectSpace.Rollback();
// add and save log record
context.Package.CreateLogRecord(PackageEventType.Failed, errorString);
context.ObjectSpace.CommitChanges();
context.Worker.ReportError(Localizer.PackageLoadingIsFailed, context.Package);
}
else
{
// update last loaded package id for sender node
senderNode = senderNode ?? ReplicationNode.FindNode(context.ObjectSpace,
context.Package.SenderNodeId);
if (senderNode != null)
{
switch (context.Package.PackageType)
{
case PackageType.Protocol:
senderNode.LastLoadedPackageNumber = context.Package.PackageId;
break;
case PackageType.Snapshot:
senderNode.LastLoadedSnapshotNumber = context.Package.PackageId;
senderNode.InitDateTime = context.Package.PackageDateTime;
break;
}
}
context.Package.CreateLogRecord(PackageEventType.Loaded, "");
// save changes
context.ObjectSpace.CommitChanges();
Owner.DoAfterLoadPackage(new LoadPackageEventArgs(context.Package));
context.Worker.ReportProgress(Color.Blue, Localizer.PackageLoadingCompleted, context.Package);
}
}
else
{
Owner.DoInvalidPackage(new InvalidPackageArgs(context));
context.Worker.ReportError(Localizer.PackageRejected, context.Package);
}
return(loadResult);
}
public SnapLoadContext(LoadPackageContext context, IEnumerable<SnapshotOidMap> sourceMaps)
: base(context.Package, context.Worker, context.ObjectSpace, context.CurrentNodeId)
{
Maps = new Dictionary<object, SnapshotOidMap>();
RestoredObjects = new List<object>();
UpdatedMapping = new List<object>();
var sourceList = sourceMaps.ToList();
// fixReplicaDictionary(context, sourceList);
sourceList.ForEach(x => Maps.Add(x.Target.Target, x));
}
/// <summary>
/// Loads the package.
/// </summary>
/// <param name="context">The context.</param>
/// <returns></returns>
public string LoadProtocolPackage(LoadPackageContext context)
{
var result = string.Empty;
try
{
using (var uow = context.Package.UnitOfWork)
{
var topSessions = new XPCollection<PackageSession>(uow, CriteriaOperator.Parse("IsNull(Parent)"));
var senderNode = ReplicationNode.FindNode(context.ObjectSpace, context.Package.SenderNodeId);
topSessions.OrderBy(x => x.CommitedOn.Add(x.UtcOffset))
/* skip sessions commited before last loaded snapshot */
.Where(x => senderNode == null || x.CommitedOn > senderNode.InitDateTime)
.TakeWhile(z => !context.Worker.CancellationPending).ToList()
.ForEach(y => loadTopSession(new LoadPackageSessionContext(context, y)));
context.ObjectSpace.CommitChanges();
}
}
catch (Exception exception)
{
result = string.Format(Localizer.PackageLoadError, exception.Message);
context.Worker.ReportError( result);
}
if (string.IsNullOrEmpty(result))
{
if (context.Worker.CancellationPending)
result = Localizer.LoadingAborted;
context.Worker.ReportProgress(Color.Blue, Localizer.LoadingIs,
(context.Worker.CancellationPending ? Localizer.Aborted
: Localizer.Finished));
}
return result;
}
public string LoadSnapshotPackage(LoadPackageContext context)
{
var result = string.Empty;
XafDeltaModule.Instance.LoadService.BeginLoad();
try
{
using (var snapshotObjectSpace = new ObjectSpace(context.Package.UnitOfWork))
{
// create root context
var sourceMaps = snapshotObjectSpace.GetObjects<SnapshotOidMap>().OrderBy(x => x.OrdNo).ToList();
var rootContext = new SnapLoadContext(context, sourceMaps);
context.Worker.ReportProgress(string.Format(Localizer.ObjectsFoundInSnapshot, sourceMaps.Count));
var i = 0;
// restore all of object from snapshot
foreach (var sourceMap in sourceMaps.TakeWhile(x => !context.Worker.CancellationPending))
{
context.Worker.ReportPercent((double) i++/(double) sourceMaps.Count);
context.Worker.ShowStatus(string.Format(Localizer.SnapshotObject, sourceMap.Target.Target));
loadSnapshotObject(rootContext, sourceMap);
}
if (!context.Worker.CancellationPending)
{
// fix OidMap references
var newMaps = from c in context.ObjectSpace.ModifiedObjects.Cast<object>()
where c is OidMap && ((OidMap) c).NewObject != null
select c as OidMap;
context.ObjectSpace.CommitChanges();
newMaps.ToList().ForEach(x => x.FixReference());
snapshotPostLoad(context.ObjectSpace);
restoreLastLoadedNum(context, snapshotObjectSpace);
context.ObjectSpace.CommitChanges();
snapshotObjectSpace.Rollback();
}
}
}
catch (Exception exception)
{
result = string.Format(Localizer.SnapshotLoadingIsFailed, exception.Message);
context.Worker.ReportError(result);
}
XafDeltaModule.Instance.LoadService.EndLoad();
if (string.IsNullOrEmpty(result))
{
if (context.Worker.CancellationPending)
result = Localizer.LoadingAborted;
context.Worker.ReportProgress(Color.Blue, Localizer.SnapshotLoadingIs,
(context.Worker.CancellationPending
? Localizer.Aborted
: Localizer.Finished));
}
return result;
}
/// <summary>
/// Verify package the is valid.
/// </summary>
/// <param name="context">The context.</param>
/// <param name="senderNode">The sender node.</param>
/// <returns></returns>
private bool packageIsValid(LoadPackageContext context, ReplicationNode senderNode)
{
var packageIsValid = true;
var errors = new List<string>();
if (!Owner.AnonymousPackagesAllowed && senderNode == null)
{
packageIsValid = false;
var errorText = string.Format(Localizer.SenderNodeIsNotFound,
context.Package.SenderNodeId, context.Package);
context.Worker.ReportError( errorText);
errors.Add(errorText);
}
var expectedPackageId = 1;
if (senderNode != null)
{
switch (context.Package.PackageType)
{
case PackageType.Protocol:
expectedPackageId = senderNode.LastLoadedPackageNumber + 1;
break;
case PackageType.Snapshot:
expectedPackageId = senderNode.LastLoadedSnapshotNumber + 1;
break;
}
}
if (context.Package.PackageId != expectedPackageId)
{
packageIsValid = false;
var errorText = string.Format(Localizer.InvalidPackageId,
context.Package, context.Package.PackageId, expectedPackageId);
context.Worker.ReportError( errorText);
errors.Add(errorText);
}
if(context.Package.PackageData == null || context.Package.PackageData.Length == 0)
{
packageIsValid = false;
var errorText = string.Format(Localizer.PackageDataIsEmpty, context.Package);
context.Worker.ReportError( errorText);
errors.Add(errorText);
}
if(!packageIsValid)
{
var errorString = string.Join("\n", errors.ToArray());
context.Package.CreateLogRecord(PackageEventType.Rejected, errorString);
}
return packageIsValid;
}
/// <summary>
/// Loads the package.
/// </summary>
/// <param name="context">The load package params.</param>
public bool LoadPackage(LoadPackageContext context)
{
// prevent loading self packages
if (context.Package.SenderNodeId == context.CurrentNodeId)
return false;
// don't load packages builded before last loaded snapshot
var lastLoadedSnapshotDateTime = (from c in context.ObjectSpace.GetObjects<ReplicationNode>() select c.InitDateTime).Max();
if(context.Package.PackageDateTime < lastLoadedSnapshotDateTime)
return true;
var senderNode = ReplicationNode.FindNode(context.ObjectSpace, context.Package.SenderNodeId);
context.Worker.ReportProgress(string.Format(Localizer.LoadingPackage, context.Package));
var loadResult = false;
if (packageIsValid(context, senderNode))
{
Owner.DoBeforeLoadPackage(new LoadPackageEventArgs(context.Package));
context.Package.CreateLogRecord(PackageEventType.Loading, "");
var errorString = "";
switch (context.Package.PackageType)
{
case PackageType.Protocol:
errorString = Owner.ProtocolReplicationService.LoadProtocolPackage(context);
break;
case PackageType.Snapshot:
errorString = Owner.SnapshotService.LoadSnapshotPackage(context);
break;
}
loadResult = string.IsNullOrEmpty(errorString);
// rollback changes on error or abort
if (!loadResult)
{
Owner.DoPackageLoadingError(new PackageLoadingErrorArgs(context, errorString));
context.ObjectSpace.Rollback();
// add and save log record
context.Package.CreateLogRecord(PackageEventType.Failed, errorString);
context.ObjectSpace.CommitChanges();
context.Worker.ReportError(Localizer.PackageLoadingIsFailed, context.Package);
}
else
{
// update last loaded package id for sender node
senderNode = senderNode ?? ReplicationNode.FindNode(context.ObjectSpace,
context.Package.SenderNodeId);
if (senderNode != null)
{
switch (context.Package.PackageType)
{
case PackageType.Protocol:
senderNode.LastLoadedPackageNumber = context.Package.PackageId;
break;
case PackageType.Snapshot:
senderNode.LastLoadedSnapshotNumber = context.Package.PackageId;
senderNode.InitDateTime = context.Package.PackageDateTime;
break;
}
}
context.Package.CreateLogRecord(PackageEventType.Loaded, "");
// save changes
context.ObjectSpace.CommitChanges();
Owner.DoAfterLoadPackage(new LoadPackageEventArgs(context.Package));
context.Worker.ReportProgress(Color.Blue, Localizer.PackageLoadingCompleted, context.Package);
}
}
else
{
Owner.DoInvalidPackage(new InvalidPackageArgs(context));
context.Worker.ReportError( Localizer.PackageRejected, context.Package);
}
return loadResult;
}
/// <summary>
/// Initializes a new instance of the <see cref="InvalidPackageArgs"/> class.
/// </summary>
/// <param name="context">The context.</param>
public InvalidPackageArgs(LoadPackageContext context)
{
ApplicationObjectSpace = context.ObjectSpace;
Package = context.Package;
}
/// <summary>
/// Initializes a new instance of the <see cref="PackageLoadingErrorArgs"/> class.
/// </summary>
/// <param name="context">The context.</param>
/// <param name="errorString"></param>
public PackageLoadingErrorArgs(LoadPackageContext context, string errorString)
{
ErrorString = errorString;
Package = context.Package;
Worker = context.Worker;
ApplicationObjectSpace = context.ObjectSpace;
CurrentNodeId = context.CurrentNodeId;
}
private void createProtocolRecords(IEnumerable<PackageRecord> allRecords, LoadPackageContext context)
{
if (Owner.CreateExternalProtocolRecords)
{
using (var objectSpace = XafDeltaModule.XafApp.CreateObjectSpace())
{
foreach (var packageRecord in allRecords)
{
var protocolRecord = ProtocolRecord.CreateForPackageRecord(objectSpace,
packageRecord,
context.Package.SenderNodeId);
protocolRecord.ProtocolSession = ExternalProtocolSession.GetSession(objectSpace, packageRecord.PackageSession);
}
objectSpace.CommitChanges();
}
}
}
/// <summary>
/// Restore the last loaded number from marker.
/// </summary>
/// <param name="context">The context.</param>
/// <param name="snapshotObjectSpace">The snapshot object space.</param>
private static void restoreLastLoadedNum(LoadPackageContext context, IObjectSpace snapshotObjectSpace)
{
var marker = PackageMarker.GetInstance(snapshotObjectSpace);
if (marker == null) return;
var sender = ReplicationNode.FindNode(context.ObjectSpace, marker.SenderNodeId);
if (sender != null)
{
sender.LastLoadedPackageNumber = marker.LastSavedPackageNumber;
}
}
public LoadPackageSessionContext(LoadPackageContext context, PackageSession packageSession)
: base(context.Package, context.Worker, context.ObjectSpace, context.CurrentNodeId)
{
PackageSession = packageSession;
}
