mirror of https://github.com/tidwall/tile38.git
102 lines
2.3 KiB
Go
102 lines
2.3 KiB
Go
// Copyright 2012-2018 The NATS Authors
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package server
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import (
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"fmt"
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"os"
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"os/signal"
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"time"
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"golang.org/x/sys/windows/svc"
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"golang.org/x/sys/windows/svc/mgr"
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)
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// Signal Handling
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func (s *Server) handleSignals() {
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if s.getOpts().NoSigs {
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return
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}
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c := make(chan os.Signal, 1)
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signal.Notify(c, os.Interrupt)
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go func() {
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for sig := range c {
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s.Debugf("Trapped %q signal", sig)
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s.Noticef("Server Exiting..")
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os.Exit(0)
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}
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}()
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}
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// ProcessSignal sends the given signal command to the running gnatsd service.
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// If service is empty, this signals the "gnatsd" service. This returns an
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// error is the given service is not running or the command is invalid.
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func ProcessSignal(command Command, service string) error {
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if service == "" {
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service = serviceName
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}
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m, err := mgr.Connect()
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if err != nil {
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return err
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}
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defer m.Disconnect()
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s, err := m.OpenService(service)
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if err != nil {
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return fmt.Errorf("could not access service: %v", err)
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}
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defer s.Close()
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var (
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cmd svc.Cmd
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to svc.State
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)
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switch command {
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case CommandStop, CommandQuit:
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cmd = svc.Stop
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to = svc.Stopped
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case CommandReopen:
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cmd = reopenLogCmd
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to = svc.Running
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case CommandReload:
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cmd = svc.ParamChange
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to = svc.Running
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default:
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return fmt.Errorf("unknown signal %q", command)
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}
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status, err := s.Control(cmd)
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if err != nil {
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return fmt.Errorf("could not send control=%d: %v", cmd, err)
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}
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timeout := time.Now().Add(10 * time.Second)
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for status.State != to {
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if timeout.Before(time.Now()) {
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return fmt.Errorf("timeout waiting for service to go to state=%d", to)
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}
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time.Sleep(300 * time.Millisecond)
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status, err = s.Query()
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if err != nil {
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return fmt.Errorf("could not retrieve service status: %v", err)
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}
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}
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return nil
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}
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