/
daemon.go
56 lines (44 loc) · 863 Bytes
/
daemon.go
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package daemon
import (
"context"
"os"
"os/signal"
"syscall"
"golang.org/x/sync/errgroup"
)
type Service interface {
Start(ctx context.Context) error
Stop(ctx context.Context) error
}
type Daemon struct {
services []Service
}
func New(services ...Service) *Daemon {
return &Daemon{
services: services,
}
}
func (d *Daemon) Run(ctx context.Context) error {
runner, runCtx := errgroup.WithContext(ctx)
exit := make(chan os.Signal, 1)
signal.Notify(exit, os.Interrupt, syscall.SIGTERM)
for _, service := range d.services {
service := service
runner.Go(func() error {
return service.Start(runCtx)
})
}
go func() {
select {
case <-runCtx.Done():
case <-exit:
}
for _, service := range d.services {
service := service
runner.Go(func() error {
return service.Stop(runCtx)
})
}
}()
return runner.Wait()
}