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nsqlookupd.go
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nsqlookupd.go
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package nsqlookupd
import (
"fmt"
"net"
"os"
"github.com/bitly/nsq/util"
)
type NSQLookupd struct {
opts *nsqlookupdOptions
tcpAddr *net.TCPAddr
httpAddr *net.TCPAddr
tcpListener net.Listener
httpListener net.Listener
waitGroup util.WaitGroupWrapper
DB *RegistrationDB
}
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(util.Version("nsqlookupd"))
return n
}
func (n *NSQLookupd) logf(f string, args ...interface{}) {
if n.opts.Logger == nil {
return
}
n.opts.Logger.Output(2, fmt.Sprintf(f, args...))
}
func (l *NSQLookupd) Main() {
ctx := &Context{l}
tcpListener, err := net.Listen("tcp", l.tcpAddr.String())
if err != nil {
l.logf("FATAL: listen (%s) failed - %s", l.tcpAddr, err)
os.Exit(1)
}
l.tcpListener = tcpListener
tcpServer := &tcpServer{ctx: ctx}
l.waitGroup.Wrap(func() {
util.TCPServer(tcpListener, tcpServer, l.opts.Logger)
})
httpListener, err := net.Listen("tcp", l.httpAddr.String())
if err != nil {
l.logf("FATAL: listen (%s) failed - %s", l.httpAddr, err)
os.Exit(1)
}
l.httpListener = httpListener
httpServer := &httpServer{ctx: ctx}
l.waitGroup.Wrap(func() {
util.HTTPServer(httpListener, httpServer, l.opts.Logger, "HTTP")
})
}
func (l *NSQLookupd) Exit() {
if l.tcpListener != nil {
l.tcpListener.Close()
}
if l.httpListener != nil {
l.httpListener.Close()
}
l.waitGroup.Wait()
}