public Func <Task> BuildHandler(IServiceProvider serviceProvider, Func <Task> next)
{
var channel = serviceProvider.GetRequiredService <ITextChannel>();
var parser = serviceProvider.GetRequiredService <ICommandParser>();
var handlerLookup = serviceProvider.GetServices <ICommandHandler>().ToDictionary(x => x.Name.ToUpperInvariant());
return(async() =>
{
var loopInstance = new LoopInstance
{
IsRunning = true,
Provider = serviceProvider
};
while (loopInstance.IsRunning)
{
var commandLine = await channel.ReceiveLineAsync();
var info = parser.Parse(commandLine);
if (info.IsValid)
{
if (handlerLookup.TryGetValue(info.Name, out var handler))
{
await handler.Handle(loopInstance, info);
}
else
{
await channel.SendLineAsync($"Unknown command {info.Name}");
}
}
else
{
await channel.SendLineAsync("Invalid command");
}
}
});
}
/// <summary>wangmj 初始化一个工作流网实例,将引擎的扩展属性，注入到对应的工作流元素中</summary>
/// <param name="process"></param>
/// <param name="kenelExtensions"></param>
public NetInstance(WorkflowProcess process, Dictionary<String, List<IKernelExtension>> kenelExtensions)
{
this.workflowProcess = process;
//开始节点
StartNode startNode = workflowProcess.StartNode;
StartNodeInstance = new StartNodeInstance(startNode);
List<IKernelExtension> extensionList = kenelExtensions[StartNodeInstance.ExtensionTargetName];
for (int i = 0; extensionList != null && i < extensionList.Count; i++)
{
IKernelExtension extension = extensionList[i];
StartNodeInstance.registExtension(extension);
}
//this.StartNodeInstance = StartNodeInstance; 自身赋值自身没用。
wfElementInstanceMap.Add(startNode.Id, StartNodeInstance);
//活动节点activity
List<Activity> activities = workflowProcess.Activities;
for (int i = 0; i < activities.Count; i++)
{
Activity activity = (Activity)activities[i];
ActivityInstance activityInstance = new ActivityInstance(activity);
extensionList = kenelExtensions[activityInstance.ExtensionTargetName];
for (int j = 0; extensionList != null && j < extensionList.Count; j++)
{
IKernelExtension extension = extensionList[j];
activityInstance.registExtension(extension);
}
wfElementInstanceMap.Add(activity.Id, activityInstance);
}
//同步器节点
List<Synchronizer> synchronizers = workflowProcess.Synchronizers;
for (int i = 0; i < synchronizers.Count; i++)
{
Synchronizer synchronizer = (Synchronizer)synchronizers[i];
SynchronizerInstance synchronizerInstance = new SynchronizerInstance(synchronizer);
extensionList = kenelExtensions[synchronizerInstance.ExtensionTargetName];
for (int j = 0; extensionList != null && j < extensionList.Count; j++)
{
IKernelExtension extension = extensionList[j];
synchronizerInstance.registExtension(extension);
}
wfElementInstanceMap.Add(synchronizer.Id, synchronizerInstance);
}
//结束节点
List<EndNode> endNodes = workflowProcess.EndNodes;
// List<EndNodeInstance> endNodeInstances = netInstance.getEndNodeInstances();
for (int i = 0; i < endNodes.Count; i++)
{
EndNode endNode = endNodes[i];
EndNodeInstance endNodeInstance = new EndNodeInstance(endNode);
// endNodeInstances.add(endNodeInstance);
extensionList = kenelExtensions[endNodeInstance.ExtensionTargetName];
for (int j = 0; extensionList != null && j < extensionList.Count; j++)
{
IKernelExtension extension = extensionList[j];
endNodeInstance.registExtension(extension);
}
wfElementInstanceMap.Add(endNode.Id, endNodeInstance);
}
//转移线
List<Transition> transitions = workflowProcess.Transitions;
for (int i = 0; i < transitions.Count; i++)
{
Transition transition = (Transition)transitions[i];
TransitionInstance transitionInstance = new TransitionInstance(transition);
String fromNodeId = transition.FromNode.Id;
if (fromNodeId != null)
{
INodeInstance enteringNodeInstance = (INodeInstance)wfElementInstanceMap[fromNodeId];
if (enteringNodeInstance != null)
{
enteringNodeInstance.AddLeavingTransitionInstance(transitionInstance);
transitionInstance.EnteringNodeInstance=enteringNodeInstance;
}
}
String toNodeId = transition.ToNode.Id;
if (toNodeId != null)
{
INodeInstance leavingNodeInstance = (INodeInstance)wfElementInstanceMap[toNodeId];
if (leavingNodeInstance != null)
{
leavingNodeInstance.AddEnteringTransitionInstance(transitionInstance);
transitionInstance.LeavingNodeInstance=leavingNodeInstance;
}
}
extensionList = kenelExtensions[transitionInstance.ExtensionTargetName];
for (int j = 0; extensionList != null && j < extensionList.Count; j++)
{
IKernelExtension extension = extensionList[j];
transitionInstance.registExtension(extension);
}
wfElementInstanceMap.Add(transitionInstance.Id, transitionInstance);
}
//循环线
List<Loop> loops = workflowProcess.Loops;
for (int i = 0; i < loops.Count; i++)
{
Loop loop = (Loop)loops[i];
LoopInstance loopInstance = new LoopInstance(loop);
String fromNodeId = loop.FromNode.Id;
if (fromNodeId != null)
{
INodeInstance enteringNodeInstance = (INodeInstance)wfElementInstanceMap[fromNodeId];
if (enteringNodeInstance != null)
{
enteringNodeInstance.AddLeavingLoopInstance(loopInstance);
loopInstance.EnteringNodeInstance=enteringNodeInstance;
}
}
String toNodeId = loop.ToNode.Id;
if (toNodeId != null)
{
INodeInstance leavingNodeInstance = (INodeInstance)wfElementInstanceMap[toNodeId];
if (leavingNodeInstance != null)
{
leavingNodeInstance.AddEnteringLoopInstance(loopInstance);
loopInstance.LeavingNodeInstance=leavingNodeInstance;
}
}
extensionList = kenelExtensions[loopInstance.ExtensionTargetName];
for (int j = 0; extensionList != null && j < extensionList.Count; j++)
{
IKernelExtension extension = extensionList[j];
loopInstance.registExtension(extension);
}
wfElementInstanceMap.Add(loopInstance.Id, loopInstance);
}
}
