public WorkflowExecutorResult Execute(WorkflowInstance workflow, WorkflowOptions options)
{
WorkflowExecutorResult wfResult = new WorkflowExecutorResult();
List <ExecutionPointer> exePointers = new List <ExecutionPointer>(workflow.ExecutionPointers.Where(x => x.Active && (!x.SleepUntil.HasValue || x.SleepUntil < DateTime.Now.ToUniversalTime())));
var def = _registry.GetDefinition(workflow.WorkflowDefinitionId, workflow.Version);
if (def == null)
{
_logger.LogError("Workflow {0} version {1} is not registered", workflow.WorkflowDefinitionId, workflow.Version);
return(wfResult);
}
foreach (var pointer in exePointers)
{
var step = def.Steps.First(x => x.Id == pointer.StepId);
if (step != null)
{
try
{
switch (step.InitForExecution(wfResult, def, workflow, pointer))
{
case ExecutionPipelineDirective.Defer:
continue;
case ExecutionPipelineDirective.EndWorkflow:
workflow.Status = WorkflowStatus.Complete;
workflow.CompleteTime = DateTime.Now.ToUniversalTime();
continue;
}
if (!pointer.StartTime.HasValue)
{
pointer.StartTime = DateTime.Now;
}
_logger.LogDebug("Starting step {0} on workflow {1}", step.Name, workflow.Id);
IStepBody body = step.ConstructBody(_serviceProvider);
if (body == null)
{
_logger.LogError("Unable to construct step body {0}", step.BodyType.ToString());
pointer.SleepUntil = DateTime.Now.ToUniversalTime().Add(options.ErrorRetryInterval);
wfResult.Errors.Add(new ExecutionError()
{
WorkflowId = workflow.Id,
ExecutionPointerId = pointer.Id,
ErrorTime = DateTime.Now.ToUniversalTime(),
Message = String.Format("Unable to construct step body {0}", step.BodyType.ToString())
});
continue;
}
ProcessInputs(workflow, step, body);
IStepExecutionContext context = new StepExecutionContext()
{
Workflow = workflow,
Step = step,
PersistenceData = pointer.PersistenceData,
ExecutionPointer = pointer,
Item = pointer.ContextItem
};
switch (step.BeforeExecute(wfResult, context, pointer, body))
{
case ExecutionPipelineDirective.Defer:
continue;
case ExecutionPipelineDirective.EndWorkflow:
workflow.Status = WorkflowStatus.Complete;
workflow.CompleteTime = DateTime.Now.ToUniversalTime();
continue;
}
var result = body.Run(context);
ProcessOutputs(workflow, step, body);
ProcessExecutionResult(workflow, def, pointer, step, result);
step.AfterExecute(wfResult, context, result, pointer);
}
catch (Exception ex)
{
pointer.RetryCount++;
_logger.LogError("Workflow {0} raised error on step {1} Message: {2}", workflow.Id, pointer.StepId, ex.Message);
wfResult.Errors.Add(new ExecutionError()
{
WorkflowId = workflow.Id,
ExecutionPointerId = pointer.Id,
ErrorTime = DateTime.Now.ToUniversalTime(),
Message = ex.Message
});
switch (step.ErrorBehavior ?? def.DefaultErrorBehavior)
{
case WorkflowErrorHandling.Retry:
pointer.SleepUntil = DateTime.Now.ToUniversalTime().Add(step.RetryInterval ?? def.DefaultErrorRetryInterval ?? options.ErrorRetryInterval);
break;
case WorkflowErrorHandling.Suspend:
workflow.Status = WorkflowStatus.Suspended;
break;
case WorkflowErrorHandling.Terminate:
workflow.Status = WorkflowStatus.Terminated;
break;
}
_host.ReportStepError(workflow, step, ex);
}
}
else
{
_logger.LogError("Unable to find step {0} in workflow definition", pointer.StepId);
pointer.SleepUntil = DateTime.Now.ToUniversalTime().Add(options.ErrorRetryInterval);
wfResult.Errors.Add(new ExecutionError()
{
WorkflowId = workflow.Id,
ExecutionPointerId = pointer.Id,
ErrorTime = DateTime.Now.ToUniversalTime(),
Message = String.Format("Unable to find step {0} in workflow definition", pointer.StepId)
});
}
}
DetermineNextExecutionTime(workflow);
return(wfResult);
}
