private async Task ProcessChanges(IApplication app, SyncRequestViewModel request)
{
if (request.Changes != null && request.Changes.Any())
{
var dbChanges = new List <IChange>();
Stopwatch sw = new Stopwatch();
sw.Start();
// Dedup any changes with the same Record, Entity and Property
var uniqueChanges = new Dictionary <string, SyncRequestViewModel.ChangeViewModel>();
foreach (var change in request.Changes)
{
string key = $"{change.RecordId}-{change.Entity}-{change.Property}";
if (uniqueChanges.TryGetValue(key, out var existingChange))
{
if (change.MillisecondsAgo < existingChange.MillisecondsAgo)
{
uniqueChanges[key] = change;
}
}
else
{
uniqueChanges.Add(key, change);
}
}
Logger.LogInformation($"Deduped changes in {sw.ElapsedMilliseconds}ms count: {dbChanges.Count}");
sw.Restart();
foreach (var change in uniqueChanges.Values)
{
if (change != null)
{
DateTime modifiedUTC = requestStartTimeUTC.AddMilliseconds(-change.MillisecondsAgo);
var dbChange = ChangeRepository.CreateChange(app.AccountId, app.Id, change.RecordId, change.Group, change.Entity, change.Property, modifiedUTC.Ticks, change.Value);
dbChanges.Add(dbChange);
}
}
Logger.LogInformation($"Generated changes in {sw.ElapsedMilliseconds}ms count: {dbChanges.Count}");
sw.Restart();
if (dbChanges.Any())
{
sw.Restart();
await ChangeRepository.UpsertChangesAsync(app.Id, dbChanges);
Logger.LogInformation($"Saved changes to database in {sw.ElapsedMilliseconds}ms count: {dbChanges.Count}");
}
sw.Stop();
}
}
