// This is a little bit cute, but the HappyMealOrderState type
// is known to be the saga state document, so it'll be treated as
// the state document, while the object[] will be treated as
// cascading messages
public (HappyMealOrderState, object[]) Starts(HappyMealOrder order)
{
var state = new HappyMealOrderState
{
Order = order,
Id = ++_orderIdSequence
};
return(state, chooseActions(order, state.Id).ToArray());
}
private IEnumerable <object> chooseActions(HappyMealOrder order, int stateId)
{
// choose the outgoing messages to other systems -- or the local
// system tracking all this -- to start having this happy meal
// order put together
if (order.Drink == "Soda")
{
yield return(new SodaRequested {
OrderId = stateId
});
}
// and others
}
// This is a little bit cute, but the HappyMealOrderState type
// is known to be the saga state document, so it'll be treated as
// the state document, while the object[] will be treated as
// cascading messages
public async Task <HappyMealOrderState> Starts(HappyMealOrder order, IMessageContext context)
{
var state = new HappyMealOrderState
{
Order = order,
Id = ++_orderIdSequence
};
// You can explicitly call the IMessageContext if you prefer
if (order.Drink == "Soda")
{
await context.Send(new SodaRequested { OrderId = state.Id });
}
return(state);
}
// SAMPLE: HappyMealSaga1Local
public async Task <HappyMealOrderState> Starts(
HappyMealOrder order, // The first argument is assumed to be the message type
IMessageContext context) // Additional arguments are assumed to be services
{
var state = new HappyMealOrderState
{
Order = order,
Id = ++_orderIdSequence
};
if (order.Drink == "Soda")
{
await context.Enqueue(new SodaRequested { OrderId = state.Id });
}
// And other outgoing messages to coordinate gathering up the happy meal
return(state);
}