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Tapeti/Examples/03-FlowRequestResponse/SimpleFlowController.cs

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using System;
using ExampleLib;
using Messaging.TapetiExample;
using Tapeti.Annotations;
using Tapeti.Flow;
using Tapeti.Flow.Annotations;
namespace _03_FlowRequestResponse
{
[MessageController]
[DynamicQueue("tapeti.example.03")]
public class SimpleFlowController
{
private readonly IFlowProvider flowProvider;
private readonly IExampleState exampleState;
// Shows how multiple values can be passed to a start method
public struct StartData
{
public DateTime RequestStartTime;
public int Amount;
}
// Private and protected fields are lost between method calls because the controller is
// recreated when a response arrives. When using a persistent flow repository this may
// even be after a restart of the application.
private bool nonPersistentState;
// Public fields will be stored.
public DateTime RequestStartTime;
public SimpleFlowController(IFlowProvider flowProvider, IExampleState exampleState)
{
this.flowProvider = flowProvider;
this.exampleState = exampleState;
}
[Start]
public IYieldPoint StartFlow(StartData startData)
{
nonPersistentState = true;
RequestStartTime = startData.RequestStartTime;
return flowProvider.YieldWithRequestSync<QuoteRequestMessage, QuoteResponseMessage>(
new QuoteRequestMessage
{
Amount = startData.Amount
},
HandleQuoteResponse);
}
[Continuation]
public IYieldPoint HandleQuoteResponse(QuoteResponseMessage message)
{
if (nonPersistentState)
Console.WriteLine("[SimpleFlowController] This is not supposed to show. NonPersistentState should not be retained. Someone please check http://www.hasthelargehadroncolliderdestroyedtheworldyet.com.");
Console.WriteLine("[SimpleFlowController] Request start: " + RequestStartTime.ToLongTimeString());
Console.WriteLine("[SimpleFlowController] Response time: " + DateTime.Now.ToLongTimeString());
Console.WriteLine("[SimpleFlowController] Quote: " + message.Quote);
// Test for issue #21: Same request/response twice in flow does not continue
return flowProvider.YieldWithRequestSync<QuoteRequestMessage, QuoteResponseMessage>(
new QuoteRequestMessage
{
Amount = 42
},
HandleQuoteResponse2);
//exampleState.Done();
//return flowProvider.End();
}
[Continuation]
public IYieldPoint HandleQuoteResponse2(QuoteResponseMessage message)
{
Console.WriteLine("[SimpleFlowController] Quote 2: " + message.Quote);
exampleState.Done();
return flowProvider.End();
}
}
}