public void Start(JObject variables)
{
if (this.State != null)
{
throw new InvalidOperationException("已经具有State数据，该过程已开始，不能重复开始一个过程。");
}
var state = this.State = new ProcessState()
{
Id = this.Id = Guid.NewGuid(),
Variables = variables,
DealingActivityStates = new List <ActivityState>(),
Status = ExecuteStates.Initial
};
var startNode = this.Flow.Nodes.FirstOrDefault(p => p.Id == this.Flow.StartNodeId);
var startActivityData = new ActivityState()
{
Id = Guid.NewGuid(),
DefinationId = startNode.Id,
ProcessId = this.Id,
Status = ExecuteStates.Initial
};
state.DealingActivityStates.Add(startActivityData);
this.StateRepository.AddProcessState(state);
this.StateRepository.AddActivityState(startActivityData);
}
public ExecuteStates Execute()
{
var dealingActivityStates = new List <ActivityState>();
var todoStates = new Queue <ActivityState>(this.State.DealingActivityStates);
while (todoStates.Count > 0)
{
var activityState = todoStates.Dequeue();
var node = this.Flow.Nodes.FirstOrDefault(p => p.Id == activityState.DefinationId);
var activity = this.CreateActivity(node, activityState);
var executeStatus = activityState.Status = activity.Execute();
this.StateRepository.SaveActivityState(activityState);
if (executeStatus == ExecuteStates.Done)
{
if (node.Id == this.Flow.EndNodeId)
{
#region 尾节点，结束该Process
this.State.DealingActivityStates = null;
this.State.Status = ExecuteStates.Done;
this.StateRepository.SaveProcessState(this.State);
return(ExecuteStates.Done);
#endregion
}
else
{
#region 添加后面的节点
var nextActivityDefinationIds = activity.GetNextActivityDefinationId();
foreach (var did in nextActivityDefinationIds)
{
ActivityState nextState = todoStates.FirstOrDefault(p => p.DefinationId == did);
if (nextState == null)
{
nextState = dealingActivityStates.FirstOrDefault(p => p.DefinationId == did);
}
//todoStates
if (nextState == null)
{
nextState = new ActivityState()
{
Id = Guid.NewGuid(),
DefinationId = did,
ProcessId = this.Id,
Prevs = new List <ActivityIdentity>()
{
activity.Identity
},
Status = ExecuteStates.Initial
};
todoStates.Enqueue(nextState);
this.StateRepository.AddActivityState(nextState);
}
else
{
nextState.Prevs.Add(activity.Identity);
}
}
#endregion
}
}
else
{
dealingActivityStates.Add(activityState);
}
}
if (dealingActivityStates.Count == 0)
{
throw new Exception("流程未能走到结束节点，单已经没有下一个节点可以执行");
}
this.State.DealingActivityStates = dealingActivityStates;
this.State.Status = ExecuteStates.Suspended;
return(ExecuteStates.Suspended);
}
protected virtual Activity CreateActivity(Node node, ActivityState activityState)
{
Activity activity = null;
return(activity);
}