nsqadmin

nsqadmin 结构体定义

type Options struct {
	LogLevel  string `flag:"log-level"`
	LogPrefix string `flag:"log-prefix"`
	Verbose   bool   `flag:"verbose"` // for backwards compatibility
	Logger    Logger
	logLevel  lg.LogLevel // private, not really an option

	HTTPAddress string `flag:"http-address"`

	GraphiteURL   string `flag:"graphite-url"`
	ProxyGraphite bool   `flag:"proxy-graphite"`

	StatsdPrefix        string `flag:"statsd-prefix"`
	StatsdCounterFormat string `flag:"statsd-counter-format"`
	StatsdGaugeFormat   string `flag:"statsd-gauge-format"`

	StatsdInterval time.Duration `flag:"statsd-interval"`

	NSQLookupdHTTPAddresses []string `flag:"lookupd-http-address" cfg:"nsqlookupd_http_addresses"`
	NSQDHTTPAddresses       []string `flag:"nsqd-http-address" cfg:"nsqd_http_addresses"`

	HTTPClientConnectTimeout time.Duration `flag:"http-client-connect-timeout"`
	HTTPClientRequestTimeout time.Duration `flag:"http-client-request-timeout"`

	HTTPClientTLSInsecureSkipVerify bool   `flag:"http-client-tls-insecure-skip-verify"`
	HTTPClientTLSRootCAFile         string `flag:"http-client-tls-root-ca-file"`
	HTTPClientTLSCert               string `flag:"http-client-tls-cert"`
	HTTPClientTLSKey                string `flag:"http-client-tls-key"`

	AllowConfigFromCIDR string `flag:"allow-config-from-cidr"`

	NotificationHTTPEndpoint string `flag:"notification-http-endpoint"`

	AclHttpHeader string   `flag:"acl-http-header"`
	AdminUsers    []string `flag:"admin-user" cfg:"admin_users"`
}

Options 只有一个 New 方法， 就是创建一个 NSQAdmin 对象：

func New(opts *Options) *NSQAdmin {}

type NSQAdmin struct {
	sync.RWMutex
	opts                atomic.Value // interface 类型，实际保存的是 *Options
	httpListener        net.Listener
	waitGroup           util.WaitGroupWrapper
	notifications       chan *AdminAction
	graphiteURL         *url.URL
	httpClientTLSConfig *tls.Config
}

再看看 NSQAdmin 提供了哪些方法:

// 读取 ops 的值，这里用的 atomic 来保证同步操作
func (n *NSQAdmin) getOpts() *Options {}

// 存储 ops 的值
func (n *NSQAdmin) swapOpts(opts *Options) {}

// 返回服务器地址，即： net.Listener.Addr()
func (n *NSQAdmin) RealHTTPAddr() *net.TCPAddr {}

// 从 channel 中读取消息，转换成 json, 然后发送到 nsq 节点
func (n *NSQAdmin) handleAdminActions() {}

// 退出清理操作
// 关闭 http 监听， 关闭 channel
func (n *NSQAdmin) Exit() {}

// 监听端口
func (n *NSQAdmin) Main() {}