public void Handle(UserMementoPropagatedEvent @event)
{
using (var db = new DisciturContext())
{
int itemId = _identityMapper.GetModelId <User>(@event.Memento.Id);
if (itemId.Equals(0))
{
// User not exists
// Add new User to Read-Model
string _picture = Constants.USER_DEFAULT_PICTURE;
string _thumb = null;
if (@event.Memento.Picture != null)
{
char[] bytes = new char[@event.Memento.Picture.Length * sizeof(byte)];
System.Buffer.BlockCopy(@event.Memento.Picture, 0, bytes, 0, bytes.Length);
var _str = new string(bytes);
_picture = _thumb = _str;
}
User discuser = new User
{
Name = @event.Memento.Name,
Surname = @event.Memento.Surname,
Email = @event.Memento.Email,
UserName = @event.Memento.UserName,
Picture = _picture,
Thumb = _thumb
};
db.Users.Add(discuser);
if ([email protected])
{
// Add new User-Activation Key to Read-Model
UserActivation userActivation = new UserActivation
{
UserName = @event.Memento.UserName,
Key = @event.Memento.Id.ToString()
};
db.UserActivations.Add(userActivation);
}
db.SaveChanges();
_identityMapper.Map <User>(discuser.UserId, @event.Memento.Id);
}
// otherwise it could be used for maintenance purposes
}
}
private void ExecuteUserMigration()
{
foreach (var user in _db.Users)
{
if (_db.IdMaps.GetAggregateId <User>(user.UserId).Equals(Guid.Empty))
{
// Get fresh new ID
Guid entityId = Guid.NewGuid();
while (!_db.IdMaps.GetModelId <User>(entityId).Equals(0))
{
entityId = Guid.NewGuid();
}
//Check for User Activation
//bool isActivated = !_db.UserActivations.Any(a => a.UserName.Equals(user.UserName));
// Migration starts only if no pending user activations exists (all users are already activated)
bool isActivated = true;
// Save Ids mapping
_db.IdMaps.Map <User>(user.UserId, entityId);
// Create Memento from ReadModel
var entity = new Discitur.Domain.Model.UserMemento(entityId, 1, user.UserName, user.Surname, user.Email, user.UserName, _imageConverter.ToPictureBytes(user.Picture), isActivated);
//At this point the entity migration is complete, but an event is needed in order
//to replay correctly all events (for brand new projections, upgrade read-model, etc)
//Create a fake External event: Memento Propagation Events
using (var stream = _store.OpenStream(entityId, 0, int.MaxValue))
{
// Memento Propagation Event
var propagationEvent = new UserMementoPropagatedEvent(entity);
stream.AddMigrationCommit(entity.GetType(), propagationEvent);
}
// Save Snapshot from entity's Memento image
_store.Advanced.AddSnapshot(new Snapshot(entity.Id.ToString(), entity.Version, entity));
Trace.WriteLine(String.Format("Successfully migrated User id: {0}, Guid: {1}, UserName:{2}", user.UserId, entityId.ToString(), user.UserName), "Migration Process");
_logs.Add(String.Format("{0} - Successfully migrated User id: {1}, Guid: {2}, UserName:{3}", DateTime.Now, user.UserId, entityId.ToString(), user.UserName));
}
}
}