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Beego/grace/listener.go

63 lines
991 B
Go

package grace
import (
"net"
"os"
"syscall"
"time"
)
type graceListener struct {
net.Listener
stop chan error
stopped bool
server *Server
}
func newGraceListener(l net.Listener, srv *Server) (el *graceListener) {
el = &graceListener{
Listener: l,
stop: make(chan error),
server: srv,
}
go func() {
<-el.stop
el.stopped = true
el.stop <- el.Listener.Close()
}()
return
}
func (gl *graceListener) Accept() (c net.Conn, err error) {
tc, err := gl.Listener.(*net.TCPListener).AcceptTCP()
if err != nil {
return
}
tc.SetKeepAlive(true)
tc.SetKeepAlivePeriod(3 * time.Minute)
c = &graceConn{
Conn: tc,
server: gl.server,
}
gl.server.wg.Add(1)
return
}
func (gl *graceListener) Close() error {
if gl.stopped {
return syscall.EINVAL
}
gl.stop <- nil
return <-gl.stop
}
func (gl *graceListener) File() *os.File {
// returns a dup(2) - FD_CLOEXEC flag *not* set
tl := gl.Listener.(*net.TCPListener)
fl, _ := tl.File()
return fl
}