private LastEntitySyncTime GetLastSyncTime <T>(SynchronizationParameters synchronizationParameters) where T : AbstractEntity, new()
{
string entityName = typeof(T).Name;
LastEntitySyncTime lastSyncObj = DatabaseConnection.Connection.Query <LastEntitySyncTime>("select * from [LastEntitySyncTime] " +
"where [EntityName] = ?", new[] { entityName }).FirstOrDefault();
if (lastSyncObj == null)
{
List <T> entities = DatabaseConnection.Connection.Query <T>("select * from [" + entityName + "]");
DateTime lastSyncTime = entities.Count == 0 ? default(DateTime) : entities.Select(o => o.ModifiedDate).Max();
DatabaseConnection.Connection.Insert(lastSyncObj = new LastEntitySyncTime {
EntityName = entityName, LastDownloadTime = lastSyncTime
});
}
return(lastSyncObj);
}
private async void DownloadAsync <T>(SynchronizationParameters synchronizationParameters, Action finishedNotification) where T : AbstractEntity, new()
{
LastEntitySyncTime lastSyncRecord = GetLastSyncTime <T>(synchronizationParameters);
RestService <T> restService = new RestService <T>(synchronizationParameters);
#if DEBUG
Stopwatch watch = new Stopwatch();
TimeSpan elapsed;
watch.Start();
#endif
try
{
int pageCount = 0;
DownloadResult <T> downloadResult;
do
{
downloadResult = await restService.DownloadAsync(lastSyncRecord.LastDownloadTime, pageCount, GeneratedConstants.DownloadPageSize);
#if DEBUG
if (GeneratedConstants.LogDebug && typeof(T).Name == "GlucoseValue")
{
elapsed = watch.Elapsed;
watch.Restart();
Debug.WriteLine("Download " + typeof(T).Name + " page=" + pageCount + ", size=" + GeneratedConstants.DownloadPageSize + " needed " + elapsed);
}
#endif
pageCount++;
if (previousTask != null)
{
await previousTask;
}
if (downloadResult.Items.Count > 0)
{
previousTask = Task.Factory.StartNew(() =>
{
Stopwatch refreshWatch = new Stopwatch();
refreshWatch.Start();
List <T> objectsForUpdateLocal = new List <T>(downloadResult.Items);
if (typeof(T) == typeof(DeletedRecord) && objectsForUpdateLocal.Count > 0)
{
foreach (T obj in objectsForUpdateLocal)
{
synchronizationParameters.RecordsToDelete++;
DeletedRecord deletedRecord = obj as DeletedRecord;
int deletedRecords = DatabaseConnection
.Connection
.Execute("delete from [" + deletedRecord.EntityName + "] where [Pk] = ?",
new[] { deletedRecord.EntityPk });
if (synchronizationParameters.Refresh != null && refreshWatch.Elapsed >= TimeSpan.FromSeconds(1))
{
synchronizationParameters.Refresh();
refreshWatch.Restart();
}
synchronizationParameters.RecordsDeleted += deletedRecords;
}
DatabaseConnection.Connection.Execute("delete from DeletedRecord where EntityPk in (" +
objectsForUpdateLocal.Select(o => "'" + (o as DeletedRecord).EntityPk + "'").Aggregate((i, j) => i + "," + j) + ")");
if (synchronizationParameters.Refresh != null && refreshWatch.Elapsed >= TimeSpan.FromSeconds(1))
{
synchronizationParameters.Refresh();
refreshWatch.Restart();
}
#if DEBUG
if (GeneratedConstants.LogDebug)
{
elapsed = watch.Elapsed;
watch.Restart();
Debug.WriteLine("Performing delete actions, count=" + objectsForUpdateLocal.Count + " needed " + elapsed);
}
#endif
}
else
{
foreach (T obj in objectsForUpdateLocal)
{
try
{
DatabaseConnection.Connection.Insert(obj);
}
catch (Exception)
{
DatabaseConnection.Connection.GetChildren(obj);
obj.IsPending = false;
DatabaseConnection.Connection.Update(obj);
}
synchronizationParameters.Downloaded++;
if (synchronizationParameters.Refresh != null && refreshWatch.Elapsed >= TimeSpan.FromSeconds(1))
{
synchronizationParameters.Refresh();
refreshWatch.Restart();
}
}
#if DEBUG
if (GeneratedConstants.LogDebug && typeof(T).Name == "GlucoseValue")
{
elapsed = watch.Elapsed;
watch.Restart();
Debug.WriteLine("Insert/update actions, count=" + objectsForUpdateLocal.Count + " needed " + elapsed);
}
#endif
}
if (!downloadResult.FetchNextPage)
{
lastSyncRecord.LastDownloadTime = objectsForUpdateLocal.Last().ModifiedDate;
DatabaseConnection.Connection.Update(lastSyncRecord);
}
});
}
} while (downloadResult.FetchNextPage);
finishedNotification();
}
catch (Exception exception)
{
Debug.WriteLine(exception.StackTrace);
ExceptionHandler(synchronizationParameters, exception);
}
finally
{
synchronizationParameters.Refresh?.Invoke();
}
}
