func New(opts *Options) *NSQD {
dataPath := opts.DataPath
if opts.DataPath == "" {
cwd, _ := os.Getwd()
dataPath = cwd
}
n := &NSQD{
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)),
dl: dirlock.New(dataPath),
}
n.swapOpts(opts)
n.errValue.Store(errStore{})
err := n.dl.Lock()
if err != nil {
n.logf("FATAL: --data-path=%s in use (possibly by another instance of nsqd)", dataPath)
os.Exit(1)
}
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 != "" {
var port string
_, 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 New(opts *Options) *NSQD {
//缓存消息的磁盘路径
dataPath := opts.DataPath
if opts.DataPath == "" {
cwd, _ := os.Getwd()
dataPath = cwd
}
n := &NSQD{
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),
//WEB接听
ci: clusterinfo.New(opts.Logger, http_api.NewClient(nil)),
dl: dirlock.New(dataPath),
}
// 设置原子操作对象(配置信息) --???--是否还可以正常方式读写 (sync/atomic) (原子操作的效率要比锁来的高)
n.swapOpts(opts)
n.errValue.Store(errStore{})
//阻止数据库文件的外来操作
err := n.dl.Lock()
if err != nil {
n.logf("FATAL: --data-path=%s in use (possibly by another instance of nsqd)", dataPath)
os.Exit(1)
}
//-max-deflate-level=6: 最大的压缩比率等级
if opts.MaxDeflateLevel < 1 || opts.MaxDeflateLevel > 9 {
n.logf("FATAL: --max-deflate-level must be [1,9]")
os.Exit(1)
}
//-worker-id=0: 进程的唯一码(默认是主机名的哈希值)
if opts.ID < 0 || opts.ID >= 1024 {
n.logf("FATAL: --worker-id must be [0,1024)")
os.Exit(1)
}
//-statsd-prefix="nsq.%s": 发送给统计keys 的前缀(%s for host replacement)
if opts.StatsdPrefix != "" { //生成显示前缀
var port string
//-http-address="0.0.0.0:4151": 为 HTTP 客户端监听 <addr>:<port>
_, 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
}
//TLS安全文件传输协议
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
}