package main

import "github.com/soundcloud/visor"
import "log"

func main() {
    snapshot, err := visor.DialUri("doozer:?ca=localhost:8046", "/")

    name  := "rocket"
    stack := "HEAD" // Runtime stack revision
    repo  := "http://github.com/bazooka/rocket"

    app   := visor.NewApp(name, repo, stack, snapshot)

    _, err := app.Register()
    if err != nil {
        log.Fatalf("error registering app: %s", err)
    }

    rev := visor.NewRevision(app, "f84e19", snapshot)
    rev.ArchiveUrl = "http://artifacts/rocket/f84e19.img"

    _, err = rev.Register()
    if err != nil {
        log.Fatalf("error registering revision: %s", err)
    }
}

// Get a snapshot of the latest coordinator state
snapshot, err := visor.DialUri("doozer:?ca=localhost:8046", "/")

// Get the list of applications at snapshot
apps, _ := visor.Apps(snapshot)
app := apps[0] // app.Rev == snapshot.Rev == 1

// Set some environment vars on *app*. Every time state is
// changed in the coordinator, a new App snapshot is returned.
app, _ = app.SetEnvironmentVar("cow", "moo")  // app.Rev == 2
app, _ = app.SetEnvironmentVar("cat", "meow") // app.Rev == 3

// Attempt to get a recently set environment var from an old snapshot (apps[0].Rev == 1)
apps[0].GetEnvironmentVar("cat") // "", ErrKeyNotFound

// Get a recently set environment var from the latest snapshot (app.Rev == 3)
app.GetEnvironmentVar("cat")     // "meow", nil

package main

import "soundcloud/visor"

func main() {
  snapshot, err := visor.DialUri("doozer:?ca=localhost:8046", "/")
  if err != nil {
    panic(err)
  }

  c := make(chan *visor.Event)

  go visor.WatchEvent(snapshot, c)

  // Read one event from the channel
  fmt.Println(<-c)
}