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shutdown.go
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shutdown.go
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package shutdown
import (
"os"
"os/signal"
"syscall"
)
var _ Hook = (*hook)(nil)
// Hook a graceful shutdown hook, default with signals of SIGINT and SIGTERM
type Hook interface {
// WithSignals add more signals into hook
WithSignals(signals ...syscall.Signal) Hook
// Close register shutdown handles
Close(funcs ...func())
}
type hook struct {
ctx chan os.Signal
}
// NewHook create a Hook instance
func NewHook() Hook {
hook := &hook{
ctx: make(chan os.Signal, 1),
}
return hook.WithSignals(syscall.SIGINT, syscall.SIGTERM)
}
func (h *hook) WithSignals(signals ...syscall.Signal) Hook {
for _, s := range signals {
signal.Notify(h.ctx, s)
}
return h
}
func (h *hook) Close(funcs ...func()) {
select {
case <-h.ctx:
}
signal.Stop(h.ctx)
for _, f := range funcs {
f()
}
}