import "github.com/juju/juju/state" func main() { // create a juju state juju, err := state.NewState("mongodb://localhost/juju", nil) if err != nil { return err } // set up a new state machine machine := juju.Machine(1) sm := machine.StateMachine() fmt.Println("current state:", sm.State()) // transition to a new state sm.SetState("provisioning") fmt.Println("new state:", sm.State()) }
import "github.com/juju/juju/state" func main() { // create a juju state juju, err := state.NewState("mongodb://localhost/juju", nil) if err != nil { return err } // set up a new state machine machine := juju.Machine(1) sm := machine.StateMachine() // register state change handlers sm.AddStateChangeListener(func(old, new string) { fmt.Printf("state changed from %s to %s\n", old, new) }) // transition to a new state sm.SetState("provisioning") }In this example, we create a new juju state and set up a state machine for a machine with ID 1. We register a state change listener that prints out the old and new states whenever the state machine transitions to a new state. We then transition the state machine to a new state called "provisioning". Overall, the go github.com.juju.juju.state State Machine package provides a convenient and powerful way to manage state machines in Go applications. It is a valuable package library for any Go developer who needs to model and manage the state of their application or system.