/// <summary>
/// Finilizes the Workflow completion with backend.
/// Perform Workflow History Cleanup based on retention policy.
/// </summary>
/// <param name="wf"></param>
/// <param name="Result"></param>
/// <returns></returns>
public bool WorkflowFinalize(Workflow wf, WfResult Result)
{
if (wf == null || wf.RunId == 0)
{
throw new InvalidDataException("Workflow object can not be finalized");
}
short status_id = DBStatus.WfValue(Result.StatusCode);
string cmd_text = String.Format(WORKFLOW_FINALIZE_QUERY,
wf.WorkflowId,
wf.RunId,
status_id,
wf.HistoryRetention,
((_debug) ? 1 : 0));
ExecuteNonQuery(cmd_text);
return(true);
}
/// <summary>
/// Reports execution results to the backend
/// </summary>
/// <param name="wfs"></param>
/// <param name="Result"></param>
/// <returns></returns>
public bool WorkflowStepStatusSet(WorkflowStep wfs, WfResult Result)
{
if (wfs == null || wfs.RunId == 0)
{
throw new InvalidDataException("WorkflowStep object is not in the correct state");
}
short status_id = DBStatus.WfValue(Result.StatusCode);
string cmd_text = String.Format(WORKFLOW_STEP_STATUS_SET_QUERY,
wfs.WorkflowId,
wfs.StepId,
wfs.RunId,
status_id,
Result.ErrorCode);
ExecuteNonQuery(cmd_text);
return(true);
}
/// <summary>
/// Cancel the Batch(StepId = 0)/Step on the ExitEvent
/// </summary>
/// <param name="WfId"></param>
/// <param name="StepId"></param>
/// <param name="RunId"></param>
/// <param name="LoopGroup"></param>
public WfResult WorkflowExitEventCheck(int WfId, int StepId, int RunId)
{
string cmd_text = String.Format(WORKFLOW_EXIT_EVENT_QUERY,
WfId,
StepId,
RunId);
var ret = ExecuteScalar(cmd_text);
if (ret == null)
{
return(WfResult.Unknown);
}
WfResult result;
switch (DBStatus.DbValue((short)ret))
{
case WfStatus.Unknown:
case WfStatus.Running:
result = WfResult.Started;
break;
case WfStatus.Failed:
result = WfResult.Create(WfStatus.Failed, "Canceled", 0);
break;
case WfStatus.Succeeded:
result = WfResult.Create(WfStatus.Succeeded, "Canceled", 0);
break;
default:
result = WfResult.Started;
break;
}
return(result);
}
public WfResult Run(CancellationToken extToken)
{
_logger.Information("Start Processing Workflow Constraint {ItemKey}", _item.Key);
WfResult result = WfResult.Unknown;
WorkflowAttributeCollection attributes = _db.WorkflowAttributeCollectionGet(_item.WorkflowId, _item.StepId, _item.ConstId, _item.RunId);
attributes.Merge(_wfp.Attributes);
WorkflowActivity activity = new WorkflowActivity(_item.Process, attributes, _logger);
TimeSpan timeout = TimeSpan.FromSeconds((_item.WaitPeriod <= 0) ? 7200 : _item.WaitPeriod);
TimeSpan sleep = TimeSpan.FromSeconds((_item.Ping <= 0) ? 30 : _item.Ping);
try
{
using (CancellationTokenSource timeoutCts = new CancellationTokenSource(timeout))
using (CancellationTokenSource linkedCts = CancellationTokenSource.CreateLinkedTokenSource(extToken, timeoutCts.Token))
{
Task <WfResult> task = Task.Factory.StartNew(() =>
{
WfResult const_result = WfResult.Unknown;
IWorkflowActivity runner = activity.Activate();
while (true)
{
//Run constraint activity
using (linkedCts.Token.Register(Thread.CurrentThread.Abort))
{
try
{
//do thread hard abort if it is stuck on Run
//constraint logic should never allow this to happen thou
const_result = runner.Run(linkedCts.Token);
_logger.Debug("Constraint {ItemKey} current status = {WfStatus}", _item.Key, const_result.StatusCode.ToString());
if (const_result.StatusCode != WfStatus.Waiting)
{
break;
}
}
catch (ThreadAbortException ex)
{
throw ex;
}
}
//cts.Token.ThrowIfCancellationRequested();
Task.Delay(sleep, linkedCts.Token).Wait();
if (linkedCts.IsCancellationRequested)
{
const_result = WfResult.Canceled;
break;
}
}
return(const_result);
}, linkedCts.Token);
result = task.Result;
}
}
catch (AggregateException ex)
{
//result = WfResult.Create(WfStatus.Failed,"timeout",-3);
throw ex;
}
finally
{
_logger.Information("Finish Processing Workflow Constraint {ItemKey} with result - {WfStatus}", _item.Key, result.StatusCode.ToString());
}
return(result);
}
public WfResult Run(CancellationToken extToken)
{
_logger.Information("Start Processing Workflow step {ItemKey}:{ItemName}", _step.Key, _step.StepName);
WfResult result = WfResult.Succeeded;
try
{
//Step Constraints
if (_step.StepConstraints != null)
{
foreach (WorkflowConstraint wfc in _step.StepConstraints)
{
if (wfc.IsDisabled || wfc.Process.ProcessId == 0)
{
_logger.Debug("Constraint process is not defined or disabled {ItemKey}:{ItemName}", _step.Key, _step.StepName);
continue;
}
if ((wfc.Process.ScopeId & 12) == 0)
{
throw new ArgumentException(String.Format("Constraint Process is not of correct scope 0011 = {0}", wfc.Process.ScopeId));
}
wfc.WorkflowId = _step.WorkflowId;
wfc.StepId = _step.StepId;
wfc.RunId = _step.RunId;
WorkflowConstraintProcessor wcp = new WorkflowConstraintProcessor(wfc, _wfp);
result = wcp.Run(extToken);
if (result.StatusCode == WfStatus.Failed)
{
_logger.Error("Workflow step {ItemKey}:{ItemName} failed with: {ErrorCode}", _step.Key, _step.StepName, result.Message, result.ErrorCode);
return(result);
}
}
}
WorkflowAttributeCollection attributes = null;
if (_step.StepProcess != null)
{
//always evaluate step attributes
attributes = _db.WorkflowAttributeCollectionGet(_step.WorkflowId, _step.StepId, 0, _step.RunId);
attributes.Merge(_wfp.Attributes);
if (_step.StepProcess.ProcessId != 0)
{
if ((_step.StepProcess.ScopeId & 3) == 0)
{
throw new ArgumentException(String.Format("Step Process is not of correct scope 1100 = {0}", _step.StepProcess.ScopeId));
}
//Run Step Activity here
WorkflowActivity step_activity = new WorkflowActivity(_step.StepProcess, attributes, _logger);
IWorkflowActivity step_runner = step_activity.Activate();
result = (ProcessRunAsync(step_runner, extToken, _step.StepRetry, _step.StepDelayOnRetry, _step.StepTimeout, _logger)).Result;
}
else
{
_logger.Debug("Step process is not defined. Skipped {ItemKey}", _step.Key);
}
}
if (result.StatusCode == WfStatus.Succeeded &&
_step.StepOnSuccessProcess != null)
{
_logger.Information("On step success");
_logger.Debug("On success process - {ProcessName}", _step.StepOnSuccessProcess.Process);
if ((_step.StepOnSuccessProcess.ScopeId & 3) == 0)
{
throw new ArgumentException(String.Format("OnSuccess Process is not of correct scope 1100 = {0}", _step.StepOnSuccessProcess.ScopeId));
}
//Run OnSuccess Activity here
//re-evaluate attribites
//if (attributes == null)
attributes = _db.WorkflowAttributeCollectionGet(_step.WorkflowId, _step.StepId, 0, _step.RunId);
WorkflowActivity success_activity = new WorkflowActivity(_step.StepOnSuccessProcess, attributes, _logger);
IWorkflowActivity success_runner = success_activity.Activate();
WfResult task_result = (ProcessRunAsync(success_runner, extToken, 0, 0, _step.StepTimeout, _logger)).Result;
if (task_result.StatusCode == WfStatus.Failed)
{
result = task_result;
}
}
else if (result.StatusCode == WfStatus.Failed &&
_step.StepOnFailureProcess != null)
{
_logger.Information("On step failure");
_logger.Debug("On failure process - {ProcessName}", _step.StepOnFailureProcess.Process);
if ((_step.StepOnFailureProcess.ScopeId & 3) == 0)
{
throw new ArgumentException(String.Format("OnFailure Process is not of correct scope 1100 = {0}", _step.StepOnFailureProcess.ScopeId));
}
//Run OnFailure Activity here
//re-evaluate attribites
//if (attributes == null)
attributes = _db.WorkflowAttributeCollectionGet(_step.WorkflowId, _step.StepId, 0, _step.RunId);
WorkflowActivity failure_activity = new WorkflowActivity(_step.StepOnFailureProcess, attributes, _logger);
IWorkflowActivity failure_runner = failure_activity.Activate();
WfResult task_result = (ProcessRunAsync(failure_runner, extToken, 0, 0, _step.StepTimeout, _logger)).Result;
if (task_result.StatusCode == WfStatus.Failed)
{
result = task_result;
}
}
}
catch (AggregateException aex)
{
_logger.Error(aex, "AggregateException: {Message}", aex.Message);
foreach (var ex in aex.InnerExceptions)
{
_logger.Error(ex, "InnerException: {Message}", ex.Message);
}
result = WfResult.Create(WfStatus.Failed, aex.Message, -10);
}
catch (Exception ex)
{
_logger.Error(ex, "Exception: {0}", ex.Message);
result = WfResult.Create(WfStatus.Failed, ex.Message, -10);
}
_logger.Information("Workflow step {ItemKey}:{ItemName} finished with result {WfStatus}", _step.Key, _step.StepName, result.StatusCode.ToString());
return(result);
}
private async Task <WfResult> ProcessRunAsync(IWorkflowActivity runner, CancellationToken token, int retry, int delay, int timeout, ILogger logger)
{
return(await Task.Factory.StartNew(() =>
{
WfResult result = WfResult.Failed;
//do thread hard abort if it is stuck on Run
//using (token.Register(Thread.CurrentThread.Abort))
//{
for (int i = 0; i <= retry; i++)
{
using (CancellationTokenSource timeoutCts = new CancellationTokenSource())
using (CancellationTokenSource linkedCts = CancellationTokenSource.CreateLinkedTokenSource(token, timeoutCts.Token))
{
if (timeout > 0)
{
timeoutCts.CancelAfter(TimeSpan.FromSeconds(timeout));
}
try
{
token.ThrowIfCancellationRequested();
if (i > 0)
{
logger.Information("Retry attempt {Count} on: {Message}", i, result.Message);
if (delay > 0)
{
Task.Delay(TimeSpan.FromSeconds(delay), token).Wait();
}
}
result = runner.Run(linkedCts.Token);
}
catch (ThreadAbortException ex)
{
logger.Error(ex, "ThreadAbortException: {0}", ex.Message);
result = WfResult.Create(WfStatus.Failed, ex.Message, -10);
}
catch (AggregateException aex)
{
logger.Error(aex, "AggregateException: {Message}", aex.Message);
foreach (var ex in aex.InnerExceptions)
{
logger.Error(ex, "InnerException: {Message}", ex.Message);
}
result = WfResult.Failed;
if (timeoutCts.IsCancellationRequested)
{
result = WfResult.Create(WfStatus.Failed, "Step was cancelled on timeout", -10);
logger.Error(aex, result.Message);
}
if (token.IsCancellationRequested)
{
logger.Error(aex, "Step was cancelled");
result = WfResult.Canceled;
}
}
catch (Exception ex)
{
logger.Error(ex, "Exception: {Message}", ex.Message);
result = WfResult.Create(WfStatus.Failed, ex.Message, -10);
}
if (result.StatusCode == WfStatus.Succeeded ||
token.IsCancellationRequested)
{
break;
}
}
}
return result;
//}
}));//, token);
}
public void SetTo(WfResult result)
{
this.StatusCode = result.StatusCode;
this.Message = result.Message;
this.ErrorCode = result.ErrorCode;
}
public static WfResult Create(WfResult result)
{
return(new WfResult(result.StatusCode, result.Message, result.ErrorCode));
}