public static void SetTimer(UpdateBrotliParam p_state)
{
if (g_updateTimer == null)
{
g_updateTimer = new System.Threading.Timer(new TimerCallback(Timer_Elapsed), p_state, TimeSpan.FromMilliseconds(10 * 1000), TimeSpan.FromMilliseconds(-1.0)); // first time: start almost immediately
}
else
{
DateTime etNow = Utils.ConvertTimeFromUtcToEt(DateTime.UtcNow);
DateTime targetTimeEt = etNow.AddHours(3); // Polling for change in every 3 hours
Utils.Logger.Info($"UpdateRedisBrotlisService next targetdate: {targetTimeEt.ToSqDateTimeStr()} ET");
g_updateTimer.Change(targetTimeEt - etNow, TimeSpan.FromMilliseconds(-1.0)); // runs only once
}
}
public static void Update(UpdateBrotliParam p_state)
{
// 1. Check if binary BrotliRecords in RedisDb is Consistent With the text Json source (Json in either in RedisDb, but more likely in PostgreSql)
// start using Redis:'allAssets.brotli' (520bytes instead of 1.52KB) immediately. User only modifies the JSON version Redis:'allAssets'.
// 15 seconds later check the Redis consistency. In a very rare case when that finds discrepancy between 'allAssets.brotli' vs. 'allAssets' then
// it updates Redis:'allAssets.brotli' and re-call HistoricalDataReloadAndSetTimer()
Utils.Logger.Info($"UpdateRedisBrotlisService.Update()");
bool wasAnyBrotliUpdated = p_state.Db !.UpdateBrotlisIfNeeded();
if (wasAnyBrotliUpdated)
{
Utils.Logger.Info($"Some Brotlis were updated in RedisDb.");
}
// if any brotli was updated, do NOT invoke Reload. It is not the task of this service.
// ReloadDbDataIfChangedAndSetTimer();
}