private void IterateWorkflow(WorkflowRun <TWfContext> run)
{
if (_finish.Exists(precondition => precondition.Met(run.FinishedTasks)))
{
WorkflowFinished?.Invoke(this, new WorkflowEventArgs <TWfContext>(run.RunId, run.Context));
return;
}
var tasksToExecute = _tasks.Where(kv => kv.Value.Met(run.FinishedTasks) && !run.HasFinished(kv.Key))
.Select(kv => kv.Key).ToList();
var anythingFinished = false;
foreach (var task in tasksToExecute)
{
task.Action(run.Context);
run.StartTask(task);
TaskStarted?.Invoke(this, new WorkflowTaskEventArgs <TWfContext>(run.RunId, task.TaskId, run.Context));
if (task.Autocomplete)
{
TaskFinished?.Invoke(this,
new WorkflowTaskEventArgs <TWfContext>(run.RunId, task.TaskId, run.Context));
run.FinishTask(task);
anythingFinished = true;
}
}
if (anythingFinished)
{
IterateWorkflow(run);
}
}
public void ConsumeMessage <TMessage>(TMessage message)
{
if (_startsOn.ContainsKey(typeof(TMessage)))
{
var run = new WorkflowRun <TWfContext>(
((Func <TMessage, TWfContext>)_startsOn[typeof(TMessage)])(message));
_runs.Add(run);
WorkflowStarted?.Invoke(this, new WorkflowEventArgs <TWfContext>(run.RunId, run.Context));
IterateWorkflow(run);
return;
}
var runs = _runs.ToArray();
var tasksToFinish = _continuesOn.Where(kv => kv.Value == typeof(TMessage)).Select(kv => kv.Key);
foreach (var workflowTask in tasksToFinish)
{
var messageBasedTask = (WorkflowTask <TWfContext, TMessage>)workflowTask;
var runsToProcess = runs.Where(r =>
(messageBasedTask).WorkflowRunSelector(r.Context, message))
.Where(r => r.HasStarted(workflowTask));
foreach (var run in runsToProcess)
{
messageBasedTask.AfterMessageReceived?.Invoke(run.Context, message);
TaskFinished?.Invoke(this,
new WorkflowTaskEventArgs <TWfContext>(run.RunId, workflowTask.TaskId, run.Context));
run.FinishTask(workflowTask);
IterateWorkflow(run);
}
}
}
