//This is all in another app Domain
public async Task <WorkflowState> Start(IWorkflowContextPersistor persistor, IWorkflowLoader loader, string workflowId, int version, string systemId, string initialData)
{
WorkflowContext context = new WorkflowContext(workflowId, version, systemId)
{
GlobalParameters = JObject.Parse(initialData)
};
var result = await CreateGraphAndExecute(context, loader, persistor);
return(result);
}
public async Task <WorkflowState> Resume(IWorkflowContextPersistor persistor, IWorkflowLoader loader, string workflowInstanceId, string data)
{
var context = persistor.Load(workflowInstanceId);
if (context == null)
{
throw new WorkflowEngineException("Workflow context can not be null");
}
if (string.IsNullOrWhiteSpace(context.WorkflowId))
{
throw new WorkflowEngineException("workflowId is missing in the route");
}
context.MergeGlobalContexts(JObject.Parse(data));
var result = await CreateGraphAndExecute(context, loader, persistor, true);
return(result);
}
public Controller(IWorkflowContextPersistor persistor, WorkflowContext context)
{
this.persistor = persistor;
this.context = context;
}
private async Task <WorkflowState> CreateGraphAndExecute(WorkflowContext context, IWorkflowLoader loader, IWorkflowContextPersistor instancePersistor, bool isResume = false)
{
IWorkflowInstance workflowInstance = loader.LoadWorkflow(context.WorkflowId, context.WorkflowVersion, context
, new Controller(instancePersistor, context));
await workflowInstance.Initialize();
var state = isResume ? await workflowInstance.Resume() : await workflowInstance.Execute();
instancePersistor.Save(context);
return(new WorkflowState()
{
Context = context.ToJson(), Id = workflowInstance.Id, State = state
});
}
private WorkflowState CreateGraphAndExecute(WorkflowContext context, IWorkflowLoader loader, IWorkflowContextPersistor instancePersistor, bool isResume = false)
{
IWorkflowInstance workflowInstance = loader.LoadWorkflow(context.WorkflowId, context.WorkflowVersion, context
, new Controller(instancePersistor, context));
workflowInstance.Initialize().Wait();
var state = isResume ? workflowInstance.Resume().Result :workflowInstance.Execute().Result;
var persistentState = instancePersistor.Save(context);
return(new WorkflowState()
{
Context = persistentState.Context,
Id = persistentState.InstanceId,
State = state,
RequiredParameters = context.RequiredParameters.ToArray()
});
}
