GO ZK WATCH監聽

這是一個建立於 的文章，其中的資訊可能已經有所發展或是發生改變。

package main import (    "fmt"    "github.com/samuel/go-zookeeper/zk"    "strings"    "time") func must(err error) {    if err != nil {        panic(err)    }} func connect() *zk.Conn {    servers := strings.Split("127.0.0.1:2181", ",")    conn, _, err := zk.Connect(servers, time.Second)    must(err)    return conn} func mirror(conn *zk.Conn, path string) (chan []string, chan error) {    snapshots := make(chan []string)    errors := make(chan error)     go func() {        for {            snapshot, _, events, err := conn.ChildrenW(path)            if err != nil {                errors <- err                return            }            snapshots <- snapshot            evt := <-events            if evt.Err != nil {                errors <- evt.Err                return            }        }    }()     return snapshots, errors} func main() {    conn1 := connect()    defer conn1.Close()     flags := int32(zk.FlagEphemeral)    acl := zk.WorldACL(zk.PermAll)     _, err := conn1.Create("/mirror", nil, int32(0), acl)    if err != nil {        fmt.Printf("create: %+v\n", err)    }     snapshots, errors := mirror(conn1, "/mirror")    go func() {        for {            select {            case snapshot := <-snapshots:                fmt.Printf("%+v\n", snapshot)            case err := <-errors:                fmt.Printf("%+v\n", err)            }        }    }()     conn2 := connect()    time.Sleep(time.Second)     _, err = conn2.Create("/mirror/one", []byte("one"), flags, acl)    must(err)    time.Sleep(time.Second)     _, err = conn2.Create("/mirror/two", []byte("two"), flags, acl)    must(err)    time.Sleep(time.Second)     err = conn1.Delete("/mirror/two", 0)    must(err)    time.Sleep(time.Second)     _, err = conn2.Create("/mirror/three", []byte("three"), flags, acl)    must(err)    time.Sleep(time.Second)     conn2.Close()    time.Sleep(time.Second)}