/// <summary>
/// Internal method called by the StoreConflict class in order to resolve a store conflict. This must be done
/// because there must be some maintenance of the in-memory collections depending on the resolution of the conflict
/// </summary>
/// <param name="conflict">Conflict to resolve</param>
/// <param name="resolutionAction">Resolution action.</param>
internal void ResolveOfflineConflict(OfflineConflict conflict, SyncConflictResolutionAction resolutionAction)
{
using (saveSyncLock.LockObject())
{
// Cache the modified entity, which may disappear depending on the resolution
OfflineEntity visibleEntity = conflict.ModifiedEntity;
// Respond to the resolution
switch (resolutionAction)
{
case SyncConflictResolutionAction.AcceptModifiedEntity:
conflict.ModifiedEntity.UpdateModifiedTickCount();
break;
case SyncConflictResolutionAction.AcceptStoreEntity:
cacheData.ResolveStoreConflictByRollback(conflict.ModifiedEntity);
break;
default:
throw new ArgumentException("Invalid resolution action specified");
}
// Cleanup pointers to conflicts everywhere.
visibleEntity.OfflineConflict = null;
offlineConflicts.Remove(conflict);
// Clearing the c will prevent the resolution from being triggered again.
conflict.ClearContext();
}
}
public void ProcessedEntity(OfflineEntity entity)
{
string atomId = entity.ServiceMetadata.Id;
OfflineEntityKey key = (OfflineEntityKey)entity.GetIdentity();
key.TypeName = entity.GetType().FullName;
if (entity.IsTombstone)
{
if (String.IsNullOrEmpty(atomId))
{
pkeySet.Add(key);
}
else
{
atomIdSet.Add(atomId);
}
}
else
{
pkeySet.Add(key);
if (!String.IsNullOrEmpty(atomId))
{
atomIdSet.Add(atomId);
}
}
}
public bool ContainsEntity(OfflineEntity entity)
{
// If the entity is a tombstone, use the atom id
if (entity.IsTombstone)
{
if (String.IsNullOrEmpty(entity.ServiceMetadata.Id))
{
// if it's a tombstone and the id is null, it means it is a delete of
// a local insert that can be skipped, so we report it as already written
return(true);
}
return(atomIdSet.Contains(entity.ServiceMetadata.Id));
}
if (!String.IsNullOrEmpty(entity.ServiceMetadata.Id))
{
return(atomIdSet.Contains(entity.ServiceMetadata.Id));
}
OfflineEntityKey key = (OfflineEntityKey)entity.GetIdentity();
key.TypeName = entity.GetType().FullName;
return(pkeySet.Contains(key));
}
/// <summary>
/// Adds a error to the list of in-memory
/// </summary>
/// <param name="error"></param>
/// <param name="context">Context for the conflict is being added</param>
public void AddSyncError(SyncError error, WinEightContext context)
{
OfflineEntity entity = Collections[error.LiveEntity.GetType()].AddOrUpdateSyncEntity((OfflineEntity)error.LiveEntity);
SyncError oldError = Collections[error.LiveEntity.GetType()].MapSyncError(entity, error, context);
SyncErrors.Add(error);
if (oldError != null)
{
ClearSyncError(oldError, context);
}
}
/// <summary>
/// Adds a conflict to the list of in-memory
/// </summary>
/// <param name="conflict">Conflict to add</param>
/// <param name="context">Context for which the conflict is being added</param>
public void AddSyncConflict(SyncConflict conflict, WinEightContext context)
{
OfflineEntity entity = Collections[conflict.LiveEntity.GetType()].AddOrUpdateSyncEntity((OfflineEntity)conflict.LiveEntity);
SyncConflict oldConflict = Collections[conflict.LiveEntity.GetType()].MapSyncConflict(entity, conflict, context);
SyncConflicts.Add(conflict);
if (oldConflict != null)
{
ClearSyncConflict(oldConflict, context);
}
}
/// <summary>
/// Does reflection to copy the properties from another entity to this entity
/// </summary>
/// <param name="entity">Entity from which to copy properties</param>
private void CopyEntityToThis(OfflineEntity entity)
{
IEnumerable <PropertyInfo> propInfos = GetEntityProperties();
object[] parameters = new object[] { };
foreach (PropertyInfo propInfo in propInfos)
{
propInfo.SetMethod.Invoke(this, new[] { propInfo.GetMethod.Invoke(entity, parameters) });
}
CopyODataPropertiesToThis(entity);
this.entityMetadata.IsTombstone = entity.entityMetadata.IsTombstone;
}
/// <summary>
/// Gets the original state of the entity at the time it was last Submitted.
/// </summary>
/// <returns>The original entity, if the entity has been modified, null otherwise.</returns>
public OfflineEntity GetOriginal()
{
OfflineEntity org = null;
lock (syncRoot)
{
if (this.EntityState == OfflineEntityState.Modified &&
this.original != null)
{
org = (OfflineEntity)Activator.CreateInstance(this.GetType());
FillEntityFromSnapshot(org);
org.IsReadOnly = true;
}
}
return(org);
}
/// <summary>
/// Copies the properties from the entity to the snapshot
/// </summary>
/// <param name="entity">Entity from which to copy properties</param>
private OfflineEntitySnapshot GetSnapshotFromEntity(OfflineEntity entity)
{
OfflineEntitySnapshot snapshot = new OfflineEntitySnapshot();
IEnumerable <PropertyInfo> properties = GetEntityProperties();
// Copy data properties
foreach (PropertyInfo property in properties)
{
object val = property.GetMethod.Invoke(entity, null);
snapshot.Properties[property.Name] = val;
}
snapshot.TickCount = entity.TickCount;
snapshot.EntityState = entity.EntityState;
snapshot.Metadata = entity.ServiceMetadata.Clone();
return(snapshot);
}
/// <summary>
/// Uses the snapshot to fill the entity's properties
/// </summary>
/// <param name="entity">Entity to fill</param>
internal void FillEntityFromSnapshot(OfflineEntity entity)
{
Type type = entity.GetType();
foreach (var property in original.Properties)
{
PropertyInfo propInfo = type.GetTypeInfo().GetDeclaredProperty(property.Key);
// If propInfo is null, it's an internal property
// that will be handled later
if (propInfo != null)
{
propInfo.SetMethod.Invoke(entity, new[] { property.Value });
}
}
// Get the internal properties
entity.entityMetadata = original.Metadata;
entity.EntityState = original.EntityState;
entity.TickCount = original.TickCount;
}
/// <summary>
/// Updates an entity from sync.
/// </summary>
/// <param name="entity">Entity with changes to update</param>
/// <returns>Whether or not the entity is already modified</returns>
internal void UpdateFromSync(OfflineEntity entity)
{
lock (syncRoot)
{
if (this.EntityState == OfflineEntityState.Modified)
{
OfflineEntitySnapshot snapshot = GetSnapshotFromEntity(entity);
snapshot.IsTombstone = entity.IsTombstone;
snapshot.TickCount = this.TickCount + 1;
this.original = snapshot;
}
else
{
trackChanges = false;
// Update properties
CopyEntityToThis(entity);
trackChanges = true;
}
}
}
public abstract void ClearSyncError(OfflineEntity entity);
public abstract void ClearSyncConflict(OfflineEntity entity);
public abstract OfflineEntity AddOrUpdateSyncEntity(OfflineEntity entity,
bool delayNotification);
/// <summary>
/// Copies OData properties that don't need to be snapshoted
/// </summary>
/// <param name="entity">Entity from which to copy properties</param>
private void CopyODataPropertiesToThis(OfflineEntity entity)
{
this.entityMetadata.Id = entity.entityMetadata.Id;
this.entityMetadata.EditUri = entity.entityMetadata.EditUri;
this.entityMetadata.ETag = entity.entityMetadata.ETag;
}
/// <summary>
/// Copies the properties from the entity to the snapshot
/// </summary>
/// <param name="entity">Entity from which to copy properties</param>
private OfflineEntitySnapshot GetSnapshotFromEntity(OfflineEntity entity)
{
OfflineEntitySnapshot snapshot = new OfflineEntitySnapshot();
IEnumerable<PropertyInfo> properties = GetEntityProperties();
// Copy data properties
foreach (PropertyInfo property in properties)
{
object val = property.GetMethod.Invoke(entity, null);
snapshot.Properties[property.Name] = val;
}
snapshot.TickCount = entity.TickCount;
snapshot.EntityState = entity.EntityState;
snapshot.Metadata = entity.ServiceMetadata.Clone();
return snapshot;
}
public abstract void AddSerializedEntity(OfflineEntity entity);
/// <summary>
/// Copies OData properties that don't need to be snapshoted
/// </summary>
/// <param name="entity">Entity from which to copy properties</param>
private void CopyODataPropertiesToThis(OfflineEntity entity)
{
this.entityMetadata.Id = entity.entityMetadata.Id;
this.entityMetadata.EditUri = entity.entityMetadata.EditUri;
this.entityMetadata.ETag = entity.entityMetadata.ETag;
}
public abstract void ClearSyncConflict(OfflineEntity entity);
public abstract void ClearSyncError(OfflineEntity entity);
public abstract void ResolveConflictByRollback(OfflineEntity entity);
public abstract SyncError MapSyncError(OfflineEntity entity, SyncError error,
WinEightContext context);
public abstract SyncConflict MapSyncConflict(OfflineEntity entity, SyncConflict conflict,
WinEightContext context);
/// <summary>
/// Updates an entity from sync.
/// </summary>
/// <param name="entity">Entity with changes to update</param>
/// <returns>Whether or not the entity is already modified</returns>
internal void UpdateFromSync(OfflineEntity entity)
{
lock (syncRoot)
{
if (this.EntityState == OfflineEntityState.Modified)
{
OfflineEntitySnapshot snapshot = GetSnapshotFromEntity(entity);
snapshot.IsTombstone = entity.IsTombstone;
snapshot.TickCount = this.TickCount + 1;
this.original = snapshot;
}
else
{
trackChanges = false;
// Update properties
CopyEntityToThis(entity);
trackChanges = true;
}
}
}
public abstract OfflineEntity AddOrUpdateSyncEntity(OfflineEntity entity);
/// <summary>
/// Does reflection to copy the properties from another entity to this entity
/// </summary>
/// <param name="entity">Entity from which to copy properties</param>
private void CopyEntityToThis(OfflineEntity entity)
{
IEnumerable<PropertyInfo> propInfos = GetEntityProperties();
object[] parameters = new object[] { };
foreach (PropertyInfo propInfo in propInfos)
{
propInfo.SetMethod.Invoke(this, new[] { propInfo.GetMethod.Invoke(entity, parameters) });
}
CopyODataPropertiesToThis(entity);
this.entityMetadata.IsTombstone = entity.entityMetadata.IsTombstone;
}
public abstract void AddSerializedEntity(OfflineEntity entity);
/// <summary>
/// Uses the snapshot to fill the entity's properties
/// </summary>
/// <param name="entity">Entity to fill</param>
internal void FillEntityFromSnapshot(OfflineEntity entity)
{
Type type = entity.GetType();
foreach (var property in original.Properties)
{
PropertyInfo propInfo = type.GetTypeInfo().GetDeclaredProperty(property.Key);
// If propInfo is null, it's an internal property
// that will be handled later
if (propInfo != null)
{
propInfo.SetMethod.Invoke(entity, new[] { property.Value });
}
}
// Get the internal properties
entity.entityMetadata = original.Metadata;
entity.EntityState = original.EntityState;
entity.TickCount = original.TickCount;
}
public void AddSerializedLocalChange(OfflineEntity entity)
{
entity.EntityState = OfflineEntityState.Saved;
Collections[entity.GetType()].AddSerializedEntity(entity);
}
/// <summary>
/// Method called by the context to resolve a conflict with StoreItemWins
/// </summary>
/// <param name="entity"></param>
public void ResolveStoreConflictByRollback(OfflineEntity entity)
{
Type type = entity.GetType();
Collections[type].ResolveConflictByRollback(entity);
}
public abstract SyncError MapSyncError(OfflineEntity entity, SyncError error,
WinEightContext context);
public void AddSerializedDownloadItem(OfflineEntity entity)
{
entity.EntityState = OfflineEntityState.Unmodified;
// Pass the entity to the collection
Collections[entity.GetType()].AddOrUpdateSyncEntity(entity);
}
public abstract void ResolveConflictByRollback(OfflineEntity entity);
public void AddSerializedDownloadItem(OfflineEntity entity)
{
entity.EntityState = OfflineEntityState.Unmodified;
// Pass the entity to the collection
Collections[entity.GetType()].AddOrUpdateSyncEntity(entity);
}
public abstract OfflineEntity AddOrUpdateSyncEntity(OfflineEntity entity);
public abstract OfflineEntity AddOrUpdateSyncEntity(OfflineEntity entity,
bool delayNotification);
/// <summary>
/// Method called by the context to resolve a conflict with StoreItemWins
/// </summary>
/// <param name="entity"></param>
public void ResolveStoreConflictByRollback(OfflineEntity entity)
{
Type type = entity.GetType();
Collections[type].ResolveConflictByRollback(entity);
}
public abstract SyncConflict MapSyncConflict(OfflineEntity entity, SyncConflict conflict,
WinEightContext context);
public void AddSerializedLocalChange(OfflineEntity entity)
{
entity.EntityState = OfflineEntityState.Saved;
Collections[entity.GetType()].AddSerializedEntity(entity);
}
