private async Task ReportRemoteIdGreaterThanLocal(DbWatcherSettings cfg)
{
var msg = $"Remote ID [{RemoteId}] is greater than Local ID [{LocalId}].";
Log("«DATA_ANOMALY» " + msg);
await _hub.ReportDataAnomaly(cfg.UniqueDbName, msg);
}
private Process StartSenderProcess(out DbWatcherSettings watcherSettings)
{
var cfg = JsonFile.Read <ChangeSenderSettings>("ChangeSender.cfg");
watcherSettings = cfg.WatchList[0];
return(Process.Start(@"..\..\..\LiteDbSync.ChangeSender.WPF\bin\Debug\ChangeSender.exe"));
}
internal void SetTarget(DbWatcherSettings fileWatcherSettings)
{
_cfg = fileWatcherSettings;
var nme = Path.GetFileName(_cfg.DbFilePath);
var typ = _cfg.CollectionName;
var ims = $"every {_cfg.IntervalMS:n0} ms";
UpdateTitle($"Watching “{nme}” ‹{typ}› [{ims}]");
}
private async Task SendChangesToServer(DbWatcherSettings cfg)
{
var recs = _local.GetRecords(cfg.DbFilePath,
cfg.CollectionName, RemoteId + 1, LocalId);
Log($"Sending {recs.Count:N0} record(s) to remote database ...");
await _hub.SendRecordsToRemote(cfg.UniqueDbName, recs);
}
private async Task <long> GetLastServerId(DbWatcherSettings cfg)
{
var newId = await _hub.GetLastRemoteId(cfg.UniqueDbName);
if (newId != RemoteId)
{
Log($"Latest remote Id: [{newId:N0}]");
}
return(newId);
}
public void SendChangesIfAny(DbWatcherSettings dbCfg)
{
if (_isBusy)
{
Log("‹ChangeSender› cannot process the request to [SendChangesIfAny] while a previous request is running.");
return;
}
_isBusy = true;
Task.Run(async() =>
{
try
{
await SendChangesIfAnyAsync(dbCfg);
}
catch (Exception ex)
{
Log(ex.Info(true, true));
}
_isBusy = false;
});
}
private async Task SendChangesIfAnyAsync(DbWatcherSettings cfg)
{
LocalId = _local.GetLatestId(cfg.DbFilePath, cfg.CollectionName);
RemoteId = await GetLastServerId(cfg);
if (RemoteId < 0)
{
return;
}
if (RemoteId == LocalId)
{
return;
}
if (RemoteId > LocalId)
{
await ReportRemoteIdGreaterThanLocal(cfg);
return;
}
await SendChangesToServer(cfg);
await SendChangesIfAnyAsync(cfg);
}
