func main() {
var help = flag.Bool("help", false, "print help")
var port = flag.Int("port", -1, "port to listen")
var rout = flag.String("rout", "random", "routing policy: random, roundrobin")
var urls Urls
flag.Var(&urls, "url", "backend url")
var gracefulRestart = graceful.SetFlag()
flag.Parse()
if *help || *port == -1 || urls == nil {
flag.PrintDefaults()
return
}
router, err := balanser.NewChooser(*rout, urls)
if err != nil {
flag.PrintDefaults()
return
}
balanser := btcp.NewBalanser(router, urls)
server := grpc.NewServer(rpc.NewServer(), func(srv *rpc.Server, conn io.ReadWriteCloser) {
if err := balanser.Request(conn.(*net.TCPConn)); err != nil {
log.Errorln(err)
}
})
graceful.SetSighup(server)
if err := server.ListenAndServe(":"+strconv.Itoa(*port), *gracefulRestart); err != nil {
log.Fatal(errors.NewErr(err))
}
if err := graceful.Restart(server); err != nil {
log.Fatal(err)
}
}
func NewServer(server *rpc.Server) *grpc.Server {
return grpc.NewServer(server, func(srv *rpc.Server, conn io.ReadWriteCloser) {
srv.ServeCodec(jsonrpc.NewServerCodec(conn))
})
}