Golang version.String函数代码示例

func main() {
	flagSet.Parse(os.Args[1:])

	if *showVersion {
		fmt.Println(version.String("nsqlookupd"))
		return
	}

	signalChan := make(chan os.Signal, 1)
	signal.Notify(signalChan, syscall.SIGINT, syscall.SIGTERM)

	var cfg map[string]interface{}
	if *config != "" {
		_, err := toml.DecodeFile(*config, &cfg)
		if err != nil {
			log.Fatalf("ERROR: failed to load config file %s - %s", *config, err.Error())
		}
	}

	opts := nsqlookupd.NewOptions()
	options.Resolve(opts, flagSet, cfg)
	daemon := nsqlookupd.New(opts)

	daemon.Main()
	<-signalChan
	daemon.Exit()
}

func New(opts *Options) *NSQLookupd {
	n := &NSQLookupd{
		opts: opts,
		DB:   NewRegistrationDB(),
	}
	n.logf(version.String("nsqlookupd"))
	return n
}

func New(opts *Options) *NSQD {
	n := &NSQD{
		flag:                 flagHealthy,
		startTime:            time.Now(),
		topicMap:             make(map[string]*Topic),
		idChan:               make(chan MessageID, 4096),
		exitChan:             make(chan int),
		notifyChan:           make(chan interface{}),
		optsNotificationChan: make(chan struct{}, 1),
		ci:                   clusterinfo.New(opts.Logger, http_api.NewClient(nil)),
	}
	n.swapOpts(opts)

	if opts.MaxDeflateLevel < 1 || opts.MaxDeflateLevel > 9 {
		n.logf("FATAL: --max-deflate-level must be [1,9]")
		os.Exit(1)
	}

	if opts.ID < 0 || opts.ID >= 1024 {
		n.logf("FATAL: --worker-id must be [0,1024)")
		os.Exit(1)
	}

	if opts.StatsdPrefix != "" {
		_, port, err := net.SplitHostPort(opts.HTTPAddress)
		if err != nil {
			n.logf("ERROR: failed to parse HTTP address (%s) - %s", opts.HTTPAddress, err)
			os.Exit(1)
		}
		statsdHostKey := statsd.HostKey(net.JoinHostPort(opts.BroadcastAddress, port))
		prefixWithHost := strings.Replace(opts.StatsdPrefix, "%s", statsdHostKey, -1)
		if prefixWithHost[len(prefixWithHost)-1] != '.' {
			prefixWithHost += "."
		}
		opts.StatsdPrefix = prefixWithHost
	}

	if opts.TLSClientAuthPolicy != "" && opts.TLSRequired == TLSNotRequired {
		opts.TLSRequired = TLSRequired
	}

	tlsConfig, err := buildTLSConfig(opts)
	if err != nil {
		n.logf("FATAL: failed to build TLS config - %s", err)
		os.Exit(1)
	}
	if tlsConfig == nil && opts.TLSRequired != TLSNotRequired {
		n.logf("FATAL: cannot require TLS client connections without TLS key and cert")
		os.Exit(1)
	}
	n.tlsConfig = tlsConfig

	n.logf(version.String("nsqd"))
	n.logf("ID: %d", opts.ID)

	return n
}

func NewNSQAdmin(opts *nsqadminOptions) *NSQAdmin {
	n := &NSQAdmin{
		opts:          opts,
		notifications: make(chan *AdminAction),
	}

	if len(opts.NSQDHTTPAddresses) == 0 && len(opts.NSQLookupdHTTPAddresses) == 0 {
		n.logf("--nsqd-http-address or --lookupd-http-address required.")
		os.Exit(1)
	}

	if len(opts.NSQDHTTPAddresses) != 0 && len(opts.NSQLookupdHTTPAddresses) != 0 {
		n.logf("use --nsqd-http-address or --lookupd-http-address not both")
		os.Exit(1)
	}

	// verify that the supplied address is valid
	verifyAddress := func(arg string, address string) *net.TCPAddr {
		addr, err := net.ResolveTCPAddr("tcp", address)
		if err != nil {
			n.logf("FATAL: failed to resolve %s address (%s) - %s", arg, address, err)
			os.Exit(1)
		}
		return addr
	}

	// require that both the hostname and port be specified
	for _, address := range opts.NSQLookupdHTTPAddresses {
		verifyAddress("--lookupd-http-address", address)
	}

	for _, address := range opts.NSQDHTTPAddresses {
		verifyAddress("--nsqd-http-address", address)
	}

	if opts.ProxyGraphite {
		url, err := url.Parse(opts.GraphiteURL)
		if err != nil {
			n.logf("FATAL: failed to parse --graphite-url='%s' - %s", opts.GraphiteURL, err)
			os.Exit(1)
		}
		n.graphiteURL = url
	}

	n.logf(version.String("nsqadmin"))

	return n
}

func main() {

	flagSet := nsqFlagset()
	flagSet.Parse(os.Args[1:])

	rand.Seed(time.Now().UTC().UnixNano())

	if flagSet.Lookup("version").Value.(flag.Getter).Get().(bool) {
		fmt.Println(version.String("nsqd"))
		return
	}

	signalChan := make(chan os.Signal, 1)
	signal.Notify(signalChan, syscall.SIGINT, syscall.SIGTERM)

	var cfg config
	configFile := flagSet.Lookup("config").Value.String()
	if configFile != "" {
		_, err := toml.DecodeFile(configFile, &cfg)
		if err != nil {
			log.Fatalf("ERROR: failed to load config file %s - %s", configFile, err.Error())
		}
	}
	cfg.Validate()

	opts := nsqd.NewOptions()
	options.Resolve(opts, flagSet, cfg)
	nsqd := nsqd.New(opts)

	nsqd.LoadMetadata()
	err := nsqd.PersistMetadata()
	if err != nil {
		log.Fatalf("ERROR: failed to persist metadata - %s", err.Error())
	}
	nsqd.Main()
	<-signalChan
	nsqd.Exit()
}

func NewNSQLookupd(opts *nsqlookupdOptions) *NSQLookupd {
	n := &NSQLookupd{
		opts: opts,
		DB:   NewRegistrationDB(),
	}

	tcpAddr, err := net.ResolveTCPAddr("tcp", opts.TCPAddress)
	if err != nil {
		n.logf("FATAL: failed to resolve TCP address (%s) - %s", opts.TCPAddress, err)
		os.Exit(1)
	}
	n.tcpAddr = tcpAddr

	httpAddr, err := net.ResolveTCPAddr("tcp", opts.HTTPAddress)
	if err != nil {
		n.logf("FATAL: failed to resolve HTTP address (%s) - %s", opts.HTTPAddress, err)
		os.Exit(1)
	}
	n.httpAddr = httpAddr

	n.logf(version.String("nsqlookupd"))

	return n
}

func main() {
	flagSet.Parse(os.Args[1:])

	if *showVersion {
		fmt.Println(version.String("nsqadmin"))
		return
	}

	if *templateDir != "" {
		log.Printf("WARNING: --template-dir is deprecated and will be removed in the next release (templates are now compiled into the binary)")
	}

	exitChan := make(chan int)
	signalChan := make(chan os.Signal, 1)
	go func() {
		<-signalChan
		exitChan <- 1
	}()
	signal.Notify(signalChan, syscall.SIGINT, syscall.SIGTERM)

	var cfg map[string]interface{}
	if *config != "" {
		_, err := toml.DecodeFile(*config, &cfg)
		if err != nil {
			log.Fatalf("ERROR: failed to load config file %s - %s", *config, err)
		}
	}

	opts := nsqadmin.NewNSQAdminOptions()
	options.Resolve(opts, flagSet, cfg)
	nsqadmin := nsqadmin.NewNSQAdmin(opts)

	nsqadmin.Main()
	<-exitChan
	nsqadmin.Exit()
}

func (s *httpServer) printStats(stats []TopicStats, health string, startTime time.Time, uptime time.Duration) []byte {
	var buf bytes.Buffer
	w := &buf
	now := time.Now()
	io.WriteString(w, fmt.Sprintf("%s\n", version.String("nsqd")))
	io.WriteString(w, fmt.Sprintf("start_time %v\n", startTime.Format(time.RFC3339)))
	io.WriteString(w, fmt.Sprintf("uptime %s\n", uptime))
	if len(stats) == 0 {
		io.WriteString(w, "\nNO_TOPICS\n")
		return buf.Bytes()
	}
	io.WriteString(w, fmt.Sprintf("\nHealth: %s\n", health))
	for _, t := range stats {
		var pausedPrefix string
		if t.Paused {
			pausedPrefix = "*P "
		} else {
			pausedPrefix = "   "
		}
		io.WriteString(w, fmt.Sprintf("\n%s[%-15s] depth: %-5d be-depth: %-5d msgs: %-8d e2e%%: %s\n",
			pausedPrefix,
			t.TopicName,
			t.Depth,
			t.BackendDepth,
			t.MessageCount,
			t.E2eProcessingLatency))
		for _, c := range t.Channels {
			if c.Paused {
				pausedPrefix = "   *P "
			} else {
				pausedPrefix = "      "
			}
			io.WriteString(w,
				fmt.Sprintf("%s[%-25s] depth: %-5d be-depth: %-5d inflt: %-4d def: %-4d re-q: %-5d timeout: %-5d msgs: %-8d e2e%%: %s\n",
					pausedPrefix,
					c.ChannelName,
					c.Depth,
					c.BackendDepth,
					c.InFlightCount,
					c.DeferredCount,
					c.RequeueCount,
					c.TimeoutCount,
					c.MessageCount,
					c.E2eProcessingLatency))
			for _, client := range c.Clients {
				connectTime := time.Unix(client.ConnectTime, 0)
				// truncate to the second
				duration := time.Duration(int64(now.Sub(connectTime).Seconds())) * time.Second
				_, port, _ := net.SplitHostPort(client.RemoteAddress)
				io.WriteString(w, fmt.Sprintf("        [%s %-21s] state: %d inflt: %-4d rdy: %-4d fin: %-8d re-q: %-8d msgs: %-8d connected: %s\n",
					client.Version,
					fmt.Sprintf("%s:%s", client.Name, port),
					client.State,
					client.InFlightCount,
					client.ReadyCount,
					client.FinishCount,
					client.RequeueCount,
					client.MessageCount,
					duration,
				))
			}
		}
	}
	return buf.Bytes()
}

func New(opts *Options) *NSQAdmin {
	n := &NSQAdmin{
		opts:          opts,
		notifications: make(chan *AdminAction),
	}

	if len(opts.NSQDHTTPAddresses) == 0 && len(opts.NSQLookupdHTTPAddresses) == 0 {
		n.logf("--nsqd-http-address or --lookupd-http-address required.")
		os.Exit(1)
	}

	if len(opts.NSQDHTTPAddresses) != 0 && len(opts.NSQLookupdHTTPAddresses) != 0 {
		n.logf("use --nsqd-http-address or --lookupd-http-address not both")
		os.Exit(1)
	}

	// verify that the supplied address is valid
	verifyAddress := func(arg string, address string) *net.TCPAddr {
		addr, err := net.ResolveTCPAddr("tcp", address)
		if err != nil {
			n.logf("FATAL: failed to resolve %s address (%s) - %s", arg, address, err)
			os.Exit(1)
		}
		return addr
	}

	if opts.HTTPClientTLSCert != "" && opts.HTTPClientTLSKey == "" {
		n.logf("FATAL: --http-client-tls-key must be specified with --http-client-tls-cert")
		os.Exit(1)
	}

	if opts.HTTPClientTLSKey != "" && opts.HTTPClientTLSCert == "" {
		n.logf("FATAL: --http-client-tls-cert must be specified with --http-client-tls-key")
		os.Exit(1)
	}

	n.httpClientTLSConfig = &tls.Config{
		InsecureSkipVerify: opts.HTTPClientTLSInsecureSkipVerify,
	}
	if opts.HTTPClientTLSCert != "" && opts.HTTPClientTLSKey != "" {
		cert, err := tls.LoadX509KeyPair(opts.HTTPClientTLSCert, opts.HTTPClientTLSKey)
		if err != nil {
			n.logf("FATAL: failed to LoadX509KeyPair %s, %s - %s",
				opts.HTTPClientTLSCert, opts.HTTPClientTLSKey, err)
			os.Exit(1)
		}
		n.httpClientTLSConfig.Certificates = []tls.Certificate{cert}
	}
	if opts.HTTPClientTLSRootCAFile != "" {
		tlsCertPool := x509.NewCertPool()
		caCertFile, err := ioutil.ReadFile(opts.HTTPClientTLSRootCAFile)
		if err != nil {
			n.logf("FATAL: failed to read TLS root CA file %s - %s",
				opts.HTTPClientTLSRootCAFile, err)
			os.Exit(1)
		}
		if !tlsCertPool.AppendCertsFromPEM(caCertFile) {
			n.logf("FATAL: failed to AppendCertsFromPEM %s", opts.HTTPClientTLSRootCAFile)
			os.Exit(1)
		}
		n.httpClientTLSConfig.ClientCAs = tlsCertPool
	}

	// require that both the hostname and port be specified
	for _, address := range opts.NSQLookupdHTTPAddresses {
		verifyAddress("--lookupd-http-address", address)
	}

	for _, address := range opts.NSQDHTTPAddresses {
		verifyAddress("--nsqd-http-address", address)
	}

	if opts.ProxyGraphite {
		url, err := url.Parse(opts.GraphiteURL)
		if err != nil {
			n.logf("FATAL: failed to parse --graphite-url='%s' - %s", opts.GraphiteURL, err)
			os.Exit(1)
		}
		n.graphiteURL = url
	}

	n.logf(version.String("nsqadmin"))

	return n
}