void IWaitingResumptionHandle.Resume(WaitingResumption waitingResumption)
{
var r = waitingResumption as ProcessStartResumption;
var instance = WorkflowBuilder.CreateInstance(r.Process, this._parser);
instance.Run();
}
void IWaitingResumptionHandle.Resume(WaitingResumption waitingResumption)
{
var r = waitingResumption as SubProcessCreateResumption;
var sub = r.SubProcessActivityInstance;
if (sub == null)
{
this._log.Warn("不存在待创建子流程的子流程节点信息");
return;
}
var parent = r.Process;
var setting = parent.ProcessType.GetSubProcessSetting(sub.ActivityName);
if (setting == null)
{
throw new InvalidOperationException(string.Format(
"没有找到节点“{0}”对应的SubProcessSetting，可能需要修正流程"
, sub.ActivityName));
}
//更新子流程节点实例
var subProcessId = Guid.NewGuid();
sub.SetSubProcessId(subProcessId);
this._processService.UpdateActivityInstance(sub);
//创建子流程
this._subHelper.Create(parent, setting.SubProcessTypeName, subProcessId);
}
//HACK:【重要】对单个流程实例的串行顺序调度（不包含仍处于延迟期的调度？），有异常则跳出
/*
* 关于父子流程之间的调度顺序影响问题解决
* 在按流程串行调度前提下，按调度影响点分析
* 1.发起子流程：无影响
* 2.子流程结束：子流程本身正常结束即可，对父流程的唤醒排入父流程调度项序列中，按父流程的行为继续调度即可，对应SubProcessCompleteResumption设计
* 3.并行活动中取消子流程节点：
* ActivityInstanceCancelResumption节点取消调度被设计为可自动重试，
* 直到子流程处于调度项安全状态时才会被删除
*/
internal void Resume(IOrderedEnumerable <long> list)
{
bool error = false;
WaitingResumption prev = null, r = null;
foreach (var id in list.Distinct())
{
r = this._resumptionService.Get(id);
//忽略不存在的调度项
if (r == null)
{
continue;
}
if (error &&
!this.AreAtSameFlowNodeIndex(prev, r))
{
this._log.WarnFormat("对流程“{0}”#{1}进行串行调度时异常，中断本次对该流程的调度，等待自动或人工重试"
, r.Process != null ? r.Process.Title : string.Empty
, r.Process != null ? r.Process.ID : Guid.Empty);
return;
}
error = !this.Resume(id);
prev = r;
}
}
protected virtual void MakeAnError(WaitingResumption r, Exception e)
{
//HACK:【重要】此处必须保证更新被提交，不能被nhsession问题影响，因此必须直接sqlupdate来保证
//r.SetError(true);
//this._resumptionService.Update(r);
this._resumptionService.MarkAsError(r);
this._resumptionService.AddErrorRecord(new FaultResumptionRecord(r.Process, e, r.ID));
}
private bool AreAtSameFlowNodeIndex(WaitingResumption prev, WaitingResumption r)
{
return(!prev.FlowNodeIndex.HasValue ||
!r.FlowNodeIndex.HasValue ||
(prev.FlowNodeIndex.HasValue &&
r.FlowNodeIndex.HasValue &&
r.FlowNodeIndex == prev.FlowNodeIndex));
}
void IWaitingResumptionHandle.Resume(WaitingResumption waitingResumption)
{
var r = waitingResumption as HumanEscalationResumption;
var process = r.Process;
var activityName = r.HumanActivityInstance.ActivityName;
var setting = process.ProcessType.GetHumanSetting(activityName);
var workItems = this._workItemService.GetWorkItems(process, activityName);
HumanEscalationRule rule = setting.EscalationRule;
IDictionary <string, string> dataFields = process.GetDataFields();
if (rule == null ||
!rule.IsValid ||
workItems.Count() == 0)
{
this._log.WarnFormat("流程“{0}”#{1}的节点“{2}”的超时事件升级规则无效或已经失效"
, process.Title
, process.ID
, r.HumanActivityInstance.ActivityName);
return;
}
string to;
if (rule.NotifyTemplateName != null)
{
//消息通知
this._helper.Notify(process, workItems, rule.NotifyTemplateName);
//重复通知
if (rule.NotifyRepeatMinutes.HasValue)
{
//从当前开始计算
var at = DateTime.Now.AddMinutes(rule.NotifyRepeatMinutes.Value);
this._schedulerService.Add(new HumanEscalationResumption(r.Process, at, r.HumanActivityInstance));
this._log.InfoFormat("由于设置了重复通知，再次创建超时事件升级调度项，将于{0}激活", at);
}
}
else if (!string.IsNullOrEmpty(rule.RedirectTo)
//HACK:【脚本使用】解析脚本获取实际转交目标
&& !string.IsNullOrWhiteSpace(to = this.Evaluate(rule.RedirectTo, process)))
{
//将当前任务转交给其他人
this._helper.Redirect(process, activityName, workItems, to);
}
else if (!string.IsNullOrEmpty(rule.GotoActivityName))
{
//强制跳转到指定节点
this._helper.Goto(process, activityName, rule.GotoActivityName);
}
}
private void TrySetAsActiveAtResumption(Process process, WaitingResumption resumption)
{
//只有部分调度项完成后才可进入Active
if (!resumption.EnableActiveAfterExecuted)
{
return;
}
//HACK:【重要】只要存在未执行的有效调度项就不可进入Active状态
if (this._resumptionService.AnyValidAndUnExecutedResumptions(process, resumption))
{
this._log.InfoFormat("由于流程存在未完成的调度请求，无法将其置为Active状态");
return;
}
process.MarkAsActive();
this._processService.Update(process);
this._log.InfoFormat("流程实例“{0}”#{1}进入Active状态", process.Title, process.ID);
}
public virtual void Resume(WaitingResumption r)
{
//HACK:【重要】时间调度有可能导致调度器被未满足请求占满，必须在repository层ChargeResumption时预先进行过滤
if (!r.CanResumeAtNow)
{
if (this._log.IsDebugEnabled)
{
this._log.Debug("当前时间未满足延迟调度项的时间条件");
}
return;
}
/*
* HACK:【重要】将处于不可执行的调度项置为无效，用于处理由于以下原因出现的不合法的调度记录：
* 流程状态与调度状态发生冲突，不过此类情况已经在调度重构后最大限度避免，但由于调度/服务分离的方式，还是保留此逻辑避免意外
*/
if (!r.CanExecuting)
{
r.SetInvalid();
this._resumptionService.Update(r);
this._log.WarnFormat("流程{0}#{1}处于{2}状态，该调度请求不允许被执行，取消该调度请求{3}#{4}"
, r.Process.Title
, r.Process.ID
, r.Process.Status
, r
, r.ID);
return;
}
//通过调度项对应的执行器执行实际调度逻辑
DependencyResolver.Resolve <IWaitingResumptionHandle>(r.Handle).Resume(r);
//尝试将流程置为Active状态
this.TrySetAsActiveAtResumption(r.Process, r);//注意与Update(r)的先后顺序，避免二者逻辑（update与AnyValidAndUnExecutedResumptions）死锁
//置为已执行
r.SetExecuted();
this._resumptionService.Update(r);
this._log.InfoFormat(
"[调度记录]{0}#{1}|Priority={2}|ProcessTitle={3}|ProcessId={4}"
, r
, r.ID
, r.Priority
, r.Process.Title
, r.Process.ID);
}
void IWaitingResumptionHandle.Resume(WaitingResumption waitingResumption)
{
var r = waitingResumption as BookmarkResumption;
var persisted = this._processService.GetWorkflowInstance(r.Process).WorkflowInstance;
var instance = WorkflowBuilder.CreateInstance(r.Process, this._parser);
instance.Load(persisted);
//只能尝试恢复存在的书签
if (instance.GetBookmarks().Any(o => o.Name == r.BookmarkName))
{
instance.Update(r.Process.GetInputs());
instance.ResumeBookmark(r.BookmarkName, r.Value);
}
else
{
this._log.WarnFormat("没有在流程“{0}”#{1}中找到名为{2}的书签，取消本次恢复", r.Process.Title, r.Process.ID, r.BookmarkName);
}
}
void IWaitingResumptionHandle.Resume(WaitingResumption waitingResumption)
{
var r = waitingResumption as SubProcessCompleteResumption;
var subProcess = r.SubProcess;
var parentProcess = r.Process;
//尝试从父流程中获取启动该子流程的节点实例信息
SubProcessActivityInstance sub = this._processService.GetSubProcessActivityInstances(parentProcess, subProcess);
if (sub == null)
{
throw new InvalidOperationException(string.Format("没有在父流程“{0}”#{1}中找到启动子流程“{2}”#{3}的子流程节点实例"
, parentProcess.Title
, parentProcess.ID
, subProcess.Title
, subProcess.ID));
}
//将子流程的流程变量传递给父流程
var dict = subProcess.GetDataFields();
foreach (string key in dict.Keys)
{
parentProcess.UpdateDataField(key, dict[key]);
}
//唤醒父流程
var persisted = this._processService.GetWorkflowInstance(parentProcess).WorkflowInstance;
var instance = WorkflowBuilder.CreateInstance(parentProcess, this._parser);
instance.Load(persisted);
instance.Update(parentProcess.GetInputs());
instance.ResumeBookmark(sub.ReferredBookmarkName, null);
//目前不允许在调度项中生成新的非延迟调度项，无法保证预期顺序，需要有类似核心的quack机制
////创建父流程唤醒调度项
//this._resumption.Add(new BookmarkResumption(parentProcess
// , sub.ActivityName
// , sub.ReferredBookmarkName
// , string.Empty));
//将子流程节点置为完成
sub.SetAsComplete();
this._processService.UpdateActivityInstance(sub);
}
void IWaitingResumptionHandle.Resume(WaitingResumption waitingResumption)
{
var r = waitingResumption as ActivityInstanceCancelResumption;
try
{
//由于该调度项是允许自动重试的，应避免无关异常产生影响调度队列
if (r != null &&
r.Process != null &&
r.ActivityInstance != null)
{
this._processService.CancelAllAbout(r.Process, r.ActivityInstance);
}
}
catch (Exception e)
{
this._log.Warn("取消流程节点实例时异常，将自动重试", e);
throw e;
}
}
void IWaitingResumptionHandle.Resume(WaitingResumption waitingResumption)
{
try
{
var r = waitingResumption as ErrorResumption;
//错误恢复使用粗粒度实现，不延续原有工作流实例树
var instance = WorkflowBuilder.CreateInstance(r.Process, this._parser);
instance.Update(r.Process.GetInputs());
instance.Run();
this._log.InfoFormat("尝试对流程{0}#{1}在FlowNodeIndex={2}处进行了错误恢复"
, r.Process.Title
, r.Process.ID
, r.ErrorNodeIndex);
}
catch (Exception e)
{
//由于ErrorResumption本身就是错误恢复调度，即使异常也不应抛出而导致其本身被记录成error
this._log.Error("错误重试时异常", e);
}
}
void IWaitingResumptionHandle.Resume(WaitingResumption waitingResumption)
{
var r = waitingResumption as WorkItemCreateResumption;
var human = r.HumanActivityInstance;
if (human == null)
{
this._log.Warn("不存在待创建任务的人工节点信息");
return;
}
var process = r.Process;
var setting = process.ProcessType.GetHumanSetting(human.ActivityName);
if (setting == null)
{
throw new InvalidOperationException("没有找到节点"
+ human.ActivityName
+ "对应的HumanSetting，可能需要修正流程");
}
//OneAtOnce依次创建
if (setting.SlotMode == HumanSetting.SlotDistributionMode.OneAtOnce)
{
this._workItemService.Create(human.CreateNextWorkItem(process, this._userService));
}
else
{
//AllAtOnce一次性创建
var list = human.CreateAllWorkItem(process, this._userService);
foreach (var w in list)
{
this._workItemService.Create(w);
}
}
//更新节点实例
this._processService.UpdateActivityInstance(human);
}
bool ISchedulerService.AnyValidAndUnExecutedResumptions(Process process, WaitingResumption except)
{
return _resumptionRepository.FindAnyValidAndUnExecutedResumptions(process, except);
}
void ISchedulerService.MarkAsError(WaitingResumption r)
{
r.SetError(true);
_resumptionRepository.SetError(r, true);
}
void ISchedulerService.Update(WaitingResumption r)
{
_resumptionRepository.Update(r);
}
void ISchedulerService.Add(WaitingResumption r)
{
_resumptionRepository.Add(r);
}