fsme

Finite State Machine Engine for Go

Try it

1. Demo

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Install

go get github.com/batazor/fsme/fsm

Basic Example

From examples/simple.go

package main

import (
	"fmt"
	"github.com/batazor/fsme/fsm"
)

func main() {
	// Create new FSM
    machine, err := fsm.New()

    // Add rule
    machine.AddStateTransitionRules("a", "b", "c")
    machine.AddStateTransitionRules("b", "d", "e")
    machine.AddStateTransitionRules("c", "k")
    machine.AddStateTransitionRules("d", "a")
    machine.AddStateTransitionRules("e", "k")
    machine.AddStateTransitionRules("k")

    // Add Events
    machine.AddEvent("start", "a")
    machine.AddEvent("to b", "b")
    machine.AddEvent("to d", "d")

    // Add callback for state
    machine.AddCallback("a", "enter", func(f *fsm.FSM) { fmt.Println("Enter state: ", f.GetCurrentState()) })
    machine.AddCallback("a", "leave", func(f *fsm.FSM) { fmt.Println("Leave state: ", f.GetCurrentState()) })
    machine.AddCallback("b", "enter", func(f *fsm.FSM) { fmt.Println("Enter state: ", f.GetCurrentState()) })

    // Init State
    err = machine.SetStateTransition("a")
    if err != nil {
        fmt.Println(err)
    }

    // Send Event
    err = machine.SendEvent("to b")
    if err != nil {
        fmt.Println(err)
    }
    err = machine.SendEvent("to d")
    if err != nil {
        fmt.Println(err)
    }

    fmt.Printf("State: %s\n", machine.GetCurrentState())
}

UI

Feature

• FSM
• Callback [Entry, Leave]
• UI Editor/View
• Export
• Examples

Refs

• FSM
  • https://github.com/looplab/fsm
  • https://github.com/theckman/go-fsm