public override async Task Execute(SaveLayoutCommand command)
{
var layout = await UnitOfWork.Db.Layouts.SingleOrDefaultAsync(l => l.NetworkId == command.NetworkId && l.Key == command.Key);
if (layout == null)
{
layout = new Entities.Layout()
{
Id = Guid.NewGuid(),
NetworkId = command.NetworkId,
Key = command.Key
};
UnitOfWork.Db.Layouts.Add(layout);
}
layout.GraphLayout = command.GraphLayout;
}
/// <summary>
/// 1) jeśli nie layoutu ma to utwórz nowy layout, synchronicznie odpal layout i dodaj do bazy
/// 2) jeśli jest już layout to go wczytaj
/// 2a) jeśli któryś z węzłow nie ma współżędnych to synchronicznie odpal layout ale na krótkie 0.5 sekundy
/// 2b) zakolejkuj kolejny krok rozłożenia z niskim priorytetem
/// </summary>
public async Task LayoutGraph(SigmaGraphModel graph, LayoutTask layoutTask, TimeSpan?duration)
{
if (Guid.Empty.Equals(layoutTask.Query.NetworkId))
{
throw new ArgumentNullException(nameof(layoutTask.Query.NetworkId));
}
if (graph.Nodes == null)
{
return;
}
var networkId = layoutTask.Query.NetworkId;
var layout = await _repository.Db.Layouts.SingleOrDefaultAsync(l => l.NetworkId == networkId && l.Key == layoutTask.Query.LayoutKey);
// Ad 1
if (layout == null)
{
lock (LayoutLock)
{
// prevent entering here from many threads
layout = _repository.Db.Layouts.SingleOrDefault(
l => l.NetworkId == networkId && l.Key == layoutTask.Query.LayoutKey);
if (layout == null)
{
layout = new Entities.Layout()
{
Id = Guid.NewGuid(),
NetworkId = networkId,
Key = layoutTask.Query.LayoutKey
};
_repository.Db.Layouts.Add(layout);
_repository.Db.SaveChanges();
}
}
ApplyLayout(graph, null);
var graphLayout = new GraphLayout();
ImproveAppliedLayout(graph, graphLayout, layoutTask.Settings,
duration ?? _firstTimeLayoutDuration);
// save layout
layout.GraphLayout = graphLayout;
_repository.Db.SaveChanges();
}
else
// Ad 2
{
var graphLayout = layout.GraphLayout;
if (!ApplyLayout(graph, graphLayout))
{
// ad 2a
ImproveAppliedLayout(graph, graphLayout, layoutTask.Settings, duration ?? _missingNodesImproveLayoutDuration);
layout.GraphLayout = graphLayout;
await _repository.Db.SaveChangesAsync();
}
else
{
// ad 2b
if (Background == null)
{
ImproveAppliedLayout(graph, graphLayout, layoutTask.Settings, duration ?? _missingNodesImproveLayoutDuration);
layout.GraphLayout = graphLayout;
await _repository.Db.SaveChangesAsync();
}
else
{
_log.Debug("Scheduling background layout");
if (layoutTask.ModifyLayout)
{
Background.Execute(new ImproveLayoutCommand()
{
Task = layoutTask,
Duration = duration ?? _improveLayoutInBackgroundDuration
}, new BackgroundPrincipal(Auth.UserName));
}
}
}
}
}
