// ExampleNestedStruct creates a Etcd directory using a nested Go struct and then gets the directory as JSON.
func Example_nestedStruct() {
verbose := flag.Bool("verbose", false, "Verbose")
node := flag.String("node", "", "Etcd node")
port := flag.String("port", "", "Etcd port")
flag.Parse()
// Define nested structure.
g := Group{
Name: "staff",
Users: []User{
User{
Name: "jdoe",
Age: 25,
Male: true,
FirstName: "John",
LastName: "Doe",
},
User{
Name: "lnemoy",
Age: 62,
Male: true,
FirstName: "Leonard",
LastName: "Nimoy",
},
},
}
// Connect to Etcd.
conn := getEnv()
if node == nil && port == nil {
conn = []string{fmt.Sprintf("http://%v:%v", *node, *port)}
}
if *verbose {
log.Printf("Connecting to: %s", conn)
}
client := etcd.NewClient(conn)
// Create directory structure based on struct.
err := etcdmap.Create(client, "/example", reflect.ValueOf(g))
if err != nil {
log.Fatal(err.Error())
}
// Get directory structure from Etcd.
res, err := client.Get("/example", true, true)
if err != nil {
log.Fatal(err.Error())
}
j, err2 := etcdmap.JSON(res.Node)
if err2 != nil {
log.Fatal(err2.Error())
}
fmt.Println(string(j))
// Output:
//{"id":"staff","users":{"0":{"age":"25","first_name":"John","id":"jdoe","last_name":"Doe","male":"true"},"1":{"age":"62","first_name":"Leonard","id":"lnemoy","last_name":"Nimoy","male":"true"}}}
}
// ExampleNestedStruct creates a Etcd directory using a nested Go struct and then gets the directory as JSON.
func Example_nestedStruct() {
// Get env variables.
env := getEnv()
// Options.
peers := flag.String("peers", env.Peers, "Comma separated list of etcd nodes, can be set with env. variable ETCD_PEERS")
flag.Parse()
// Define nested structure.
g := Group{
Name: "staff",
Users: []User{
User{
Name: "jdoe",
Age: 25,
Male: true,
FirstName: "John",
LastName: "Doe",
},
User{
Name: "lnemoy",
Age: 62,
Male: true,
FirstName: "Leonard",
LastName: "Nimoy",
},
},
}
// Connect to etcd.
cfg := etcd.Config{
Endpoints: strings.Split(*peers, ","),
Transport: etcd.DefaultTransport,
HeaderTimeoutPerRequest: time.Second,
}
client, err := etcd.New(cfg)
if err != nil {
log.Fatal(err)
}
kapi := etcd.NewKeysAPI(client)
// Create directory structure based on struct.
err2 := etcdmap.Create(kapi, "/example", reflect.ValueOf(g))
if err2 != nil {
log.Fatal(err2.Error())
}
// Get directory structure from Etcd.
res, err3 := kapi.Get(context.TODO(), "/example", &etcd.GetOptions{Recursive: true})
if err3 != nil {
log.Fatal(err3.Error())
}
j, err4 := etcdmap.JSON(res.Node)
if err4 != nil {
log.Fatal(err4.Error())
}
fmt.Println(string(j))
// Get directory structure from Etcd.
/*
res, err5 := kapi.Get(context.TODO(), "/example/users/0", &etcd.GetOptions{Recursive: true})
if err5 != nil {
log.Fatal(err5.Error())
}
s := User{}
err6 := etcdmap.Struct(res.Node, reflect.ValueOf(&s))
if err6 != nil {
log.Fatal(err6.Error())
}
fmt.Println(s)
*/
// Output:
//{"name":"staff","users":{"0":{"age":"25","first_name":"John","last_name":"Doe","male":"true","name":"jdoe"},"1":{"age":"62","first_name":"Leonard","last_name":"Nimoy","male":"true","name":"lnemoy"}}}
}