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stopable_listener.go
53 lines (43 loc) · 922 Bytes
/
stopable_listener.go
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package ldbserver
import (
"errors"
"net"
"time"
)
type DeadLineListener interface {
SetDeadline(t time.Time) (err error)
}
type stoppableListener struct {
net.Listener
stop chan int
}
var ErrStopped = errors.New("listener stopped")
func newStoppableListener(nl net.Listener) *stoppableListener {
return &stoppableListener{nl, make(chan int)}
}
func (sl *stoppableListener) Stop() {
close(sl.stop)
}
func (sl *stoppableListener) Accept() (c net.Conn, err error) {
for {
dl, ok := sl.Listener.(DeadLineListener)
if !ok {
return nil, errors.New("listener don't have SetDeadline method")
}
dl.SetDeadline(time.Now().Add(time.Second))
c, err = sl.Listener.Accept()
select {
case <-sl.stop:
return nil, ErrStopped
default:
}
if err != nil {
netErr, ok := err.(net.Error)
if ok && netErr.Timeout() && netErr.Temporary() {
continue
}
return nil, err
}
return
}
}