private async Task PollWorkflows() { try { if (await _lockProvider.AcquireLock("poll runnables", new CancellationToken())) { try { _logger.LogDebug("Polling for runnable workflows"); var runnables = await _persistenceStore.GetRunnableInstances(_dateTimeProvider.Now); foreach (var item in runnables) { if (_persistenceStore.SupportsScheduledCommands) { try { await _persistenceStore.ScheduleCommand(new ScheduledCommand() { CommandName = ScheduledCommand.ProcessWorkflow, Data = item, ExecuteTime = _dateTimeProvider.UtcNow.Ticks }); continue; } catch (Exception ex) { _logger.LogError(ex, ex.Message); } } if (_greylist.Contains($"wf:{item}")) { _logger.LogDebug($"Got greylisted workflow {item}"); continue; } _logger.LogDebug("Got runnable instance {0}", item); _greylist.Add($"wf:{item}"); await _queueProvider.QueueWork(item, QueueType.Workflow); } } finally { await _lockProvider.ReleaseLock("poll runnables"); } } } catch (Exception ex) { _logger.LogError(ex, ex.Message); } }
/// <summary> /// Poll the persistence store for workflows ready to run. /// Poll the persistence store for stashed unpublished events /// </summary> private async void PollRunnables(object target) { try { if (await _lockProvider.AcquireLock("poll runnables", new CancellationToken())) { try { _logger.LogInformation("Polling for runnable workflows"); var runnables = await _persistenceStore.GetRunnableInstances(DateTime.Now); foreach (var item in runnables) { if (_greylist.Contains($"wf:{item}")) { _logger.LogDebug($"Got greylisted workflow {item}"); continue; } _logger.LogDebug("Got runnable instance {0}", item); _greylist.Add($"wf:{item}"); await _queueProvider.QueueWork(item, QueueType.Workflow); } } finally { await _lockProvider.ReleaseLock("poll runnables"); } } } catch (Exception ex) { _logger.LogError(ex, ex.Message); } try { if (await _lockProvider.AcquireLock("unprocessed events", new CancellationToken())) { try { _logger.LogInformation("Polling for unprocessed events"); var events = await _persistenceStore.GetRunnableEvents(DateTime.Now); foreach (var item in events.ToList()) { if (_greylist.Contains($"evt:{item}")) { _logger.LogDebug($"Got greylisted event {item}"); _greylist.Add($"evt:{item}"); continue; } _logger.LogDebug($"Got unprocessed event {item}"); _greylist.Add($"evt:{item}"); await _queueProvider.QueueWork(item, QueueType.Event); } } finally { await _lockProvider.ReleaseLock("unprocessed events"); } } } catch (Exception ex) { _logger.LogError(ex, ex.Message); } }