public async Task <WorkflowExecutorResult> Execute(WorkflowInstance workflow)
{
var wfResult = new WorkflowExecutorResult();
var exePointers = new List <ExecutionPointer>(workflow.ExecutionPointers.Where(x => x.Active && (!x.SleepUntil.HasValue || x.SleepUntil < _datetimeProvider.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);
}
_cancellationProcessor.ProcessCancellations(workflow, def, wfResult);
foreach (var pointer in exePointers)
{
if (!pointer.Active)
{
continue;
}
var step = def.Steps.FindById(pointer.StepId);
if (step == null)
{
_logger.LogError("Unable to find step {0} in workflow definition", pointer.StepId);
pointer.SleepUntil = _datetimeProvider.Now.ToUniversalTime().Add(_options.ErrorRetryInterval);
wfResult.Errors.Add(new ExecutionError()
{
WorkflowId = workflow.Id,
ExecutionPointerId = pointer.Id,
ErrorTime = _datetimeProvider.Now.ToUniversalTime(),
Message = $"Unable to find step {pointer.StepId} in workflow definition"
});
continue;
}
try
{
if (!InitializeStep(workflow, step, wfResult, def, pointer))
{
continue;
}
await ExecuteStep(workflow, step, pointer, wfResult, def);
}
catch (Exception ex)
{
_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 = _datetimeProvider.Now.ToUniversalTime(),
Message = ex.Message
});
_executionResultProcessor.HandleStepException(workflow, def, pointer, step, ex);
Host.ReportStepError(workflow, step, ex);
}
_cancellationProcessor.ProcessCancellations(workflow, def, wfResult);
}
ProcessAfterExecutionIteration(workflow, def, wfResult);
DetermineNextExecutionTime(workflow);
return(wfResult);
}
public async Task <WorkflowExecutorResult> Execute(WorkflowInstance workflow)
{
var wfResult = new WorkflowExecutorResult();
var exePointers = new List <ExecutionPointer>(workflow.ExecutionPointers.Where(x => x.Active && (!x.SleepUntil.HasValue || x.SleepUntil < _datetimeProvider.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)
{
if (pointer.Status == PointerStatus.Cancelled)
{
continue;
}
var step = def.Steps.FindById(pointer.StepId);
if (step == null)
{
_logger.LogError("Unable to find step {0} in workflow definition", pointer.StepId);
pointer.SleepUntil = _datetimeProvider.Now.ToUniversalTime().Add(_options.ErrorRetryInterval);
wfResult.Errors.Add(new ExecutionError()
{
WorkflowId = workflow.Id,
ExecutionPointerId = pointer.Id,
ErrorTime = _datetimeProvider.Now.ToUniversalTime(),
Message = String.Format("Unable to find step {0} in workflow definition", pointer.StepId)
});
continue;
}
try
{
switch (step.InitForExecution(wfResult, def, workflow, pointer))
{
case ExecutionPipelineDirective.Defer:
continue;
case ExecutionPipelineDirective.EndWorkflow:
workflow.Status = WorkflowStatus.Complete;
workflow.CompleteTime = _datetimeProvider.Now.ToUniversalTime();
continue;
}
if (pointer.Status != PointerStatus.Running)
{
pointer.Status = PointerStatus.Running;
_publisher.PublishNotification(new StepStarted()
{
EventTimeUtc = _datetimeProvider.Now,
Reference = workflow.Reference,
ExecutionPointerId = pointer.Id,
StepId = step.Id,
WorkflowInstanceId = workflow.Id,
WorkflowDefinitionId = workflow.WorkflowDefinitionId,
Version = workflow.Version
});
}
if (!pointer.StartTime.HasValue)
{
pointer.StartTime = _datetimeProvider.Now.ToUniversalTime();
}
using (var scope = _scopeProvider.CreateScope())
{
_logger.LogDebug("Starting step {0} on workflow {1}", step.Name, workflow.Id);
IStepBody body = step.ConstructBody(scope.ServiceProvider);
if (body == null)
{
_logger.LogError("Unable to construct step body {0}", step.BodyType.ToString());
pointer.SleepUntil = _datetimeProvider.Now.ToUniversalTime().Add(_options.ErrorRetryInterval);
wfResult.Errors.Add(new ExecutionError()
{
WorkflowId = workflow.Id,
ExecutionPointerId = pointer.Id,
ErrorTime = _datetimeProvider.Now.ToUniversalTime(),
Message = String.Format("Unable to construct step body {0}", step.BodyType.ToString())
});
continue;
}
IStepExecutionContext context = new StepExecutionContext()
{
Workflow = workflow,
Step = step,
PersistenceData = pointer.PersistenceData,
ExecutionPointer = pointer,
Item = pointer.ContextItem
};
foreach (var input in step.Inputs)
{
input.AssignInput(workflow.Data, body, context);
}
switch (step.BeforeExecute(wfResult, context, pointer, body))
{
case ExecutionPipelineDirective.Defer:
continue;
case ExecutionPipelineDirective.EndWorkflow:
workflow.Status = WorkflowStatus.Complete;
workflow.CompleteTime = _datetimeProvider.Now.ToUniversalTime();
continue;
}
var result = await body.RunAsync(context);
if (result.Proceed)
{
foreach (var output in step.Outputs)
{
output.AssignOutput(workflow.Data, body, context);
}
}
_executionResultProcessor.ProcessExecutionResult(workflow, def, pointer, step, result, wfResult);
step.AfterExecute(wfResult, context, result, pointer);
}
}
catch (Exception ex)
{
_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 = _datetimeProvider.Now.ToUniversalTime(),
Message = ex.Message
});
_executionResultProcessor.HandleStepException(workflow, def, pointer, step, ex);
Host.ReportStepError(workflow, step, ex);
}
_cancellationProcessor.ProcessCancellations(workflow, def, wfResult);
}
ProcessAfterExecutionIteration(workflow, def, wfResult);
DetermineNextExecutionTime(workflow);
return(wfResult);
}