https://github.com/brandonc/statemachine

A simple, templated state machine class for .net
https://github.com/brandonc/statemachine

Last synced: about 1 month ago
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A simple, templated state machine class for .net

• Host: GitHub
• URL: https://github.com/brandonc/statemachine
• Owner: brandonc
• License: other
• Created: 2011-06-15T08:53:21.000Z (almost 14 years ago)
• Default Branch: master
• Last Pushed: 2011-06-17T23:36:19.000Z (almost 14 years ago)
• Last Synced: 2025-03-26T13:21:33.727Z (about 2 months ago)
• Language: C#
• Homepage:
• Size: 98.6 KB
• Stars: 12
• Watchers: 3
• Forks: 5
• Open Issues: 0
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

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README

        
# statemachine

> A simple, templated state machine class for c#

## Example ##

    public enum OrderState

    {

        Created,

        Ordered,

        Cancelled,

        Preparing,

        Shipped

    };

    public class Order

    {

        public StateMachine Status { get; set; }

        public void Complete()

        {

            this.Status.State = OrderState.Ordered;

        }

        public void Cancel()

        {

            this.Status.State = OrderState.Cancelled;

        }

        public void Prepare()

        {

            this.Status.State = OrderState.Preparing;

        }

        public void Ship()

        {

            this.Status.State = OrderState.Shipped;

        }

        public Order()

        {

            // You could also subclass StateMachine and encapsulate these details

            Status = new StateMachine(OrderState.Created);

            

            // Only transitions defined here are valid. Alternatively, you could call

            // ValidAny() to allow all state transitions

            Status.Valid(OrderState.Created,   OrderState.Ordered);

            Status.Valid(OrderState.Ordered,   new[] { OrderState.Cancelled, OrderState.Preparing });

            Status.Valid(OrderState.Preparing, OrderState.Shipped);

            // Enter transition events

            Status.DoWhenAny((status) =>

            {

                // Useful for writing a transition history log

                Debug.WriteLine("[{0}] Order Status => {1}", (DateTime.Now - new DateTime(1970, 1, 1, 0, 0, 0)).TotalMilliseconds, status);

            });

            // Or DoFollowingAny() for exit transitions

        }

    }

## Dynamic Events ##

	

If you're using .net 4.0, you can use dynamic binding in the style of rails:

	Status.Transitions.Enter_Shipped((Action)delegate()

    {

		Debug.WriteLine("Order Shipped!");

    });

	Status.Transitions.Exit_Ordered((Action)delegate()

    {

		Debug.WriteLine("Order Processed!");

    });