service: update example to use correct import path.
This commit is contained in:
Daniel Theophanes
+105
-105
@@ -1,105 +1,105 @@
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// Copyright 2015 Daniel Theophanes.
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// Copyright 2015 Daniel Theophanes.
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// Use of this source code is governed by a zlib-style
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// Use of this source code is governed by a zlib-style
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// license that can be found in the LICENSE file.package service
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// license that can be found in the LICENSE file.package service
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// Simple service that only works by printing a log message every few seconds.
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// Simple service that only works by printing a log message every few seconds.
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package main
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package main
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import (
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import (
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"flag"
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"flag"
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"log"
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"log"
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"time"
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"time"
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"bitbucket.org/kardianos/service2beta"
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"github.com/kardianos/service"
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)
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)
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var logger service.Logger
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var logger service.Logger
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// Program structures.
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// Program structures.
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// Define Start and Stop methods.
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// Define Start and Stop methods.
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type program struct {
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type program struct {
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exit chan struct{}
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exit chan struct{}
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}
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}
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func (p *program) Start(s service.Service) error {
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func (p *program) Start(s service.Service) error {
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if service.Interactive() {
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if service.Interactive() {
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logger.Info("Running in terminal.")
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logger.Info("Running in terminal.")
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} else {
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} else {
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logger.Info("Running under service manager.")
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logger.Info("Running under service manager.")
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}
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}
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p.exit = make(chan struct{})
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p.exit = make(chan struct{})
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// Start should not block. Do the actual work async.
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// Start should not block. Do the actual work async.
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go p.run()
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go p.run()
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return nil
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return nil
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}
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}
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func (p *program) run() error {
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func (p *program) run() error {
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logger.Infof("I'm running %v.", service.Platform())
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logger.Infof("I'm running %v.", service.Platform())
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ticker := time.NewTicker(2 * time.Second)
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ticker := time.NewTicker(2 * time.Second)
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for {
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for {
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select {
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select {
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case tm := <-ticker.C:
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case tm := <-ticker.C:
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logger.Infof("Still running at %v...", tm)
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logger.Infof("Still running at %v...", tm)
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case <-p.exit:
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case <-p.exit:
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ticker.Stop()
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ticker.Stop()
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return nil
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return nil
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}
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}
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}
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}
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return nil
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return nil
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}
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}
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func (p *program) Stop(s service.Service) error {
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func (p *program) Stop(s service.Service) error {
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// Any work in Stop should be quick, usually a few seconds at most.
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// Any work in Stop should be quick, usually a few seconds at most.
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logger.Info("I'm Stopping!")
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logger.Info("I'm Stopping!")
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close(p.exit)
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close(p.exit)
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return nil
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return nil
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}
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}
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// Service setup.
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// Service setup.
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// Define service config.
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// Define service config.
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// Create the service.
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// Create the service.
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// Setup the logger.
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// Setup the logger.
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// Handle service controls (optional).
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// Handle service controls (optional).
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// Run the service.
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// Run the service.
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func main() {
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func main() {
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svcFlag := flag.String("service", "", "Control the system service.")
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svcFlag := flag.String("service", "", "Control the system service.")
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flag.Parse()
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flag.Parse()
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svcConfig := &service.Config{
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svcConfig := &service.Config{
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Name: "GoServiceTest",
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Name: "GoServiceTest",
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DisplayName: "Go Service Test",
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DisplayName: "Go Service Test",
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Description: "This is a test Go service.",
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Description: "This is a test Go service.",
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}
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}
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prg := &program{}
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prg := &program{}
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s, err := service.New(prg, svcConfig)
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s, err := service.New(prg, svcConfig)
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if err != nil {
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if err != nil {
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log.Fatal(err)
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log.Fatal(err)
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}
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}
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errs := make(chan error, 5)
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errs := make(chan error, 5)
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logger, err = s.Logger(errs)
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logger, err = s.Logger(errs)
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if err != nil {
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if err != nil {
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log.Fatal(err)
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log.Fatal(err)
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}
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}
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go func() {
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go func() {
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for {
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for {
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err := <-errs
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err := <-errs
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if err != nil {
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if err != nil {
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log.Print(err)
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log.Print(err)
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}
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}
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}
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}
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}()
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}()
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if len(*svcFlag) != 0 {
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if len(*svcFlag) != 0 {
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err := service.Control(s, *svcFlag)
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err := service.Control(s, *svcFlag)
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if err != nil {
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if err != nil {
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log.Printf("Valid actions: %q\n", service.ControlAction)
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log.Printf("Valid actions: %q\n", service.ControlAction)
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log.Fatal(err)
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log.Fatal(err)
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}
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}
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return
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return
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}
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}
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err = s.Run()
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err = s.Run()
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if err != nil {
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if err != nil {
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logger.Error(err)
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logger.Error(err)
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}
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}
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}
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}
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+321
-321
@@ -1,321 +1,321 @@
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// Copyright 2015 Daniel Theophanes.
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// Copyright 2015 Daniel Theophanes.
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// Use of this source code is governed by a zlib-style
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// Use of this source code is governed by a zlib-style
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// license that can be found in the LICENSE file.package service
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// license that can be found in the LICENSE file.package service
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// Package service provides a simple way to create a system service.
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// Package service provides a simple way to create a system service.
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// Currently supports Windows, Linux/(systemd | Upstart | SysV), and OSX/Launchd.
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// Currently supports Windows, Linux/(systemd | Upstart | SysV), and OSX/Launchd.
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//
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//
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// Windows controls services by setting up callbacks that is non-trivial. This
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// Windows controls services by setting up callbacks that is non-trivial. This
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// is very different then other systems. This package provides the same API
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// is very different then other systems. This package provides the same API
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// despite the substantial differences.
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// despite the substantial differences.
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// It also can be used to detect how a program is called, from an interactive
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// It also can be used to detect how a program is called, from an interactive
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// terminal or from a service manager.
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// terminal or from a service manager.
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/*
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/*
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// Simple service that only works by printing a log message every few seconds.
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// Simple service that only works by printing a log message every few seconds.
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package main
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package main
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import (
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import (
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"flag"
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"flag"
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"log"
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"log"
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"time"
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"time"
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"bitbucket.org/kardianos/service2beta"
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"github.com/kardianos/service"
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)
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)
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var logger service.Logger
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var logger service.Logger
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// Program structures.
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// Program structures.
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// Define Start and Stop methods.
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// Define Start and Stop methods.
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type program struct {
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type program struct {
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exit chan struct{}
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exit chan struct{}
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}
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}
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|
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func (p *program) Start(s service.Service) error {
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func (p *program) Start(s service.Service) error {
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if service.Interactive() {
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if service.Interactive() {
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logger.Info("Running in terminal.")
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logger.Info("Running in terminal.")
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} else {
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} else {
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logger.Info("Running under service manager.")
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logger.Info("Running under service manager.")
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}
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}
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p.exit = make(chan struct{})
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p.exit = make(chan struct{})
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|
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// Start should not block. Do the actual work async.
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// Start should not block. Do the actual work async.
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go p.run()
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go p.run()
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return nil
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return nil
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}
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}
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func (p *program) run() error {
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func (p *program) run() error {
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logger.Infof("I'm running %v.", service.Platform())
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logger.Infof("I'm running %v.", service.Platform())
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ticker := time.NewTicker(2 * time.Second)
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ticker := time.NewTicker(2 * time.Second)
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||||||
for {
|
for {
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select {
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select {
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case tm := <-ticker.C:
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case tm := <-ticker.C:
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||||||
logger.Infof("Still running at %v...", tm)
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logger.Infof("Still running at %v...", tm)
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case <-p.exit:
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case <-p.exit:
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ticker.Stop()
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ticker.Stop()
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return nil
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return nil
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}
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}
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}
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}
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return nil
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return nil
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}
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}
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func (p *program) Stop(s service.Service) error {
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func (p *program) Stop(s service.Service) error {
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||||||
// Any work in Stop should be quick, usually a few seconds at most.
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// Any work in Stop should be quick, usually a few seconds at most.
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||||||
logger.Info("I'm Stopping!")
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logger.Info("I'm Stopping!")
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close(p.exit)
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close(p.exit)
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return nil
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return nil
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}
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}
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// Service setup.
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// Service setup.
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// Define service config.
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// Define service config.
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||||||
// Create the service.
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// Create the service.
|
||||||
// Setup the logger.
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// Setup the logger.
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// Handle service controls (optional).
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// Handle service controls (optional).
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||||||
// Run the service.
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// Run the service.
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func main() {
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func main() {
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svcFlag := flag.String("service", "", "Control the system service.")
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svcFlag := flag.String("service", "", "Control the system service.")
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flag.Parse()
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flag.Parse()
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svcConfig := &service.Config{
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svcConfig := &service.Config{
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Name: "GoServiceTest",
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Name: "GoServiceTest",
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DisplayName: "Go Service Test",
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DisplayName: "Go Service Test",
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Description: "This is a test Go service.",
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Description: "This is a test Go service.",
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}
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}
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prg := &program{}
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prg := &program{}
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s, err := service.New(prg, svcConfig)
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s, err := service.New(prg, svcConfig)
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if err != nil {
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if err != nil {
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log.Fatal(err)
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log.Fatal(err)
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}
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}
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errs := make(chan error, 5)
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errs := make(chan error, 5)
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logger, err = s.Logger(errs)
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logger, err = s.Logger(errs)
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if err != nil {
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if err != nil {
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log.Fatal(err)
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log.Fatal(err)
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}
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}
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|
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go func() {
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go func() {
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for {
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for {
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err := <-errs
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err := <-errs
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if err != nil {
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if err != nil {
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log.Print(err)
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log.Print(err)
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}
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}
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}
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}
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}()
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}()
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if len(*svcFlag) != 0 {
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if len(*svcFlag) != 0 {
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err := service.Control(s, *svcFlag)
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err := service.Control(s, *svcFlag)
|
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if err != nil {
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if err != nil {
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log.Printf("Valid actions: %q\n", service.ControlAction)
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log.Printf("Valid actions: %q\n", service.ControlAction)
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log.Fatal(err)
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log.Fatal(err)
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}
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}
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return
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return
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}
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}
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err = s.Run()
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err = s.Run()
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if err != nil {
|
if err != nil {
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logger.Error(err)
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logger.Error(err)
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}
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}
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}
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}
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*/
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*/
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package service // import "github.com/kardianos/service"
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package service // import "github.com/kardianos/service"
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import (
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import (
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"errors"
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"errors"
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"fmt"
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"fmt"
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)
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)
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// Config provides the setup for a Service. The Name field is required.
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// Config provides the setup for a Service. The Name field is required.
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type Config struct {
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type Config struct {
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Name string // Required name of the service. No spaces suggested.
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Name string // Required name of the service. No spaces suggested.
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DisplayName string // Display name, spaces allowed.
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DisplayName string // Display name, spaces allowed.
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Description string // Long description of service.
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Description string // Long description of service.
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|
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UserName string // Run as username.
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UserName string // Run as username.
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Arguments []string // Run with arguments.
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Arguments []string // Run with arguments.
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|
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WorkingDirectory string // Service working directory.
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WorkingDirectory string // Service working directory.
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ChRoot string
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ChRoot string
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UserService bool // Install as a current user service.
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UserService bool // Install as a current user service.
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|
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// System specific options.
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// System specific options.
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Option KeyValue
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Option KeyValue
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}
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}
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|
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var errNameFieldRequired = errors.New("Config.Name field is required.")
|
var errNameFieldRequired = errors.New("Config.Name field is required.")
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|
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// New creates a new service based on a service interface and configuration.
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// New creates a new service based on a service interface and configuration.
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func New(i Interface, c *Config) (Service, error) {
|
func New(i Interface, c *Config) (Service, error) {
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if len(c.Name) == 0 {
|
if len(c.Name) == 0 {
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return nil, errNameFieldRequired
|
return nil, errNameFieldRequired
|
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}
|
}
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return newService(i, c)
|
return newService(i, c)
|
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}
|
}
|
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|
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// KeyValue provides a list of platform specific options. See platform docs for
|
// KeyValue provides a list of platform specific options. See platform docs for
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// more details.
|
// more details.
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type KeyValue map[string]interface{}
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type KeyValue map[string]interface{}
|
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|
|
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// Bool returns the value of the given name, assuming the value is a boolean.
|
// Bool returns the value of the given name, assuming the value is a boolean.
|
||||||
// If the value isn't found or is not of the type, the defaultValue is returned.
|
// If the value isn't found or is not of the type, the defaultValue is returned.
|
||||||
func (kv KeyValue) bool(name string, defaultValue bool) bool {
|
func (kv KeyValue) bool(name string, defaultValue bool) bool {
|
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if v, found := kv[name]; found {
|
if v, found := kv[name]; found {
|
||||||
if castValue, is := v.(bool); is {
|
if castValue, is := v.(bool); is {
|
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return castValue
|
return castValue
|
||||||
}
|
}
|
||||||
}
|
}
|
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return defaultValue
|
return defaultValue
|
||||||
}
|
}
|
||||||
|
|
||||||
// Int returns the value of the given name, assuming the value is an int.
|
// Int returns the value of the given name, assuming the value is an int.
|
||||||
// If the value isn't found or is not of the type, the defaultValue is returned.
|
// If the value isn't found or is not of the type, the defaultValue is returned.
|
||||||
func (kv KeyValue) int(name string, defaultValue int) int {
|
func (kv KeyValue) int(name string, defaultValue int) int {
|
||||||
if v, found := kv[name]; found {
|
if v, found := kv[name]; found {
|
||||||
if castValue, is := v.(int); is {
|
if castValue, is := v.(int); is {
|
||||||
return castValue
|
return castValue
|
||||||
}
|
}
|
||||||
}
|
}
|
||||||
return defaultValue
|
return defaultValue
|
||||||
}
|
}
|
||||||
|
|
||||||
// Int returns the value of the given name, assuming the value is a string.
|
// Int returns the value of the given name, assuming the value is a string.
|
||||||
// If the value isn't found or is not of the type, the defaultValue is returned.
|
// If the value isn't found or is not of the type, the defaultValue is returned.
|
||||||
func (kv KeyValue) string(name string, defaultValue string) string {
|
func (kv KeyValue) string(name string, defaultValue string) string {
|
||||||
if v, found := kv[name]; found {
|
if v, found := kv[name]; found {
|
||||||
if castValue, is := v.(string); is {
|
if castValue, is := v.(string); is {
|
||||||
return castValue
|
return castValue
|
||||||
}
|
}
|
||||||
}
|
}
|
||||||
return defaultValue
|
return defaultValue
|
||||||
}
|
}
|
||||||
|
|
||||||
// Int returns the value of the given name, assuming the value is a float64.
|
// Int returns the value of the given name, assuming the value is a float64.
|
||||||
// If the value isn't found or is not of the type, the defaultValue is returned.
|
// If the value isn't found or is not of the type, the defaultValue is returned.
|
||||||
func (kv KeyValue) float64(name string, defaultValue float64) float64 {
|
func (kv KeyValue) float64(name string, defaultValue float64) float64 {
|
||||||
if v, found := kv[name]; found {
|
if v, found := kv[name]; found {
|
||||||
if castValue, is := v.(float64); is {
|
if castValue, is := v.(float64); is {
|
||||||
return castValue
|
return castValue
|
||||||
}
|
}
|
||||||
}
|
}
|
||||||
return defaultValue
|
return defaultValue
|
||||||
}
|
}
|
||||||
|
|
||||||
// Platform returns a description of the OS and service platform.
|
// Platform returns a description of the OS and service platform.
|
||||||
func Platform() string {
|
func Platform() string {
|
||||||
return system.String()
|
return system.String()
|
||||||
}
|
}
|
||||||
|
|
||||||
// Interactive returns false if running under the OS service manager
|
// Interactive returns false if running under the OS service manager
|
||||||
// and true otherwise.
|
// and true otherwise.
|
||||||
func Interactive() bool {
|
func Interactive() bool {
|
||||||
return system.Interactive()
|
return system.Interactive()
|
||||||
}
|
}
|
||||||
|
|
||||||
// runningSystem represents the system and system's service being used.
|
// runningSystem represents the system and system's service being used.
|
||||||
type runningSystem interface {
|
type runningSystem interface {
|
||||||
// String returns a description of the OS and service platform.
|
// String returns a description of the OS and service platform.
|
||||||
String() string
|
String() string
|
||||||
|
|
||||||
// Interactive returns false if running under the OS service manager
|
// Interactive returns false if running under the OS service manager
|
||||||
// and true otherwise.
|
// and true otherwise.
|
||||||
Interactive() bool
|
Interactive() bool
|
||||||
}
|
}
|
||||||
|
|
||||||
// Be sure to implement each platform.
|
// Be sure to implement each platform.
|
||||||
var _ runningSystem = system
|
var _ runningSystem = system
|
||||||
|
|
||||||
// Interface represents the service interface for a program. Start runs before
|
// Interface represents the service interface for a program. Start runs before
|
||||||
// the hosting process is granted control and Stop runs when control is returned.
|
// the hosting process is granted control and Stop runs when control is returned.
|
||||||
//
|
//
|
||||||
// 1. OS service manager executes user program.
|
// 1. OS service manager executes user program.
|
||||||
// 2. User program sees it is executed from a service manager (IsInteractive is false).
|
// 2. User program sees it is executed from a service manager (IsInteractive is false).
|
||||||
// 3. User program calls Service.Run() which blocks.
|
// 3. User program calls Service.Run() which blocks.
|
||||||
// 4. Interface.Start() is called and quickly returns.
|
// 4. Interface.Start() is called and quickly returns.
|
||||||
// 5. User program runs.
|
// 5. User program runs.
|
||||||
// 6. OS service manager signals the user program to stop.
|
// 6. OS service manager signals the user program to stop.
|
||||||
// 7. Interface.Stop() is called and quickly returns.
|
// 7. Interface.Stop() is called and quickly returns.
|
||||||
// - For a successful exit, os.Exit should not be called in Interface.Stop().
|
// - For a successful exit, os.Exit should not be called in Interface.Stop().
|
||||||
// 8. Service.Run returns.
|
// 8. Service.Run returns.
|
||||||
// 9. User program should quickly exit.
|
// 9. User program should quickly exit.
|
||||||
type Interface interface {
|
type Interface interface {
|
||||||
// Start provides a place to initiate the service. The service doesn't not
|
// Start provides a place to initiate the service. The service doesn't not
|
||||||
// signal a completed start until after this function returns, so the
|
// signal a completed start until after this function returns, so the
|
||||||
// Start function must not take more then a few seconds at most.
|
// Start function must not take more then a few seconds at most.
|
||||||
Start(s Service) error
|
Start(s Service) error
|
||||||
|
|
||||||
// Stop provides a place to clean up program execution before it is terminated.
|
// Stop provides a place to clean up program execution before it is terminated.
|
||||||
// It should not take more then a few seconds to execute.
|
// It should not take more then a few seconds to execute.
|
||||||
// Stop should not call os.Exit directly in the function.
|
// Stop should not call os.Exit directly in the function.
|
||||||
Stop(s Service) error
|
Stop(s Service) error
|
||||||
}
|
}
|
||||||
|
|
||||||
// Service represents a service that can be run or controlled.
|
// Service represents a service that can be run or controlled.
|
||||||
type Service interface {
|
type Service interface {
|
||||||
// Run should be called shortly after the program entry point.
|
// Run should be called shortly after the program entry point.
|
||||||
// After Interface.Stop has finished running, Run will stop blocking.
|
// After Interface.Stop has finished running, Run will stop blocking.
|
||||||
// After Run stops blocking, the program must exit shortly after.
|
// After Run stops blocking, the program must exit shortly after.
|
||||||
Run() error
|
Run() error
|
||||||
|
|
||||||
// Start signals to the OS service manager the given service should start.
|
// Start signals to the OS service manager the given service should start.
|
||||||
Start() error
|
Start() error
|
||||||
|
|
||||||
// Stop signals to the OS service manager the given service should stop.
|
// Stop signals to the OS service manager the given service should stop.
|
||||||
Stop() error
|
Stop() error
|
||||||
|
|
||||||
// Restart signals to the OS service manager the given service should stop then start.
|
// Restart signals to the OS service manager the given service should stop then start.
|
||||||
Restart() error
|
Restart() error
|
||||||
|
|
||||||
// Install setups up the given service in the OS service manager. This may require
|
// Install setups up the given service in the OS service manager. This may require
|
||||||
// greater rights. Will return an error if it is already installed.
|
// greater rights. Will return an error if it is already installed.
|
||||||
Install() error
|
Install() error
|
||||||
|
|
||||||
// Uninstall removes the given service from the OS service manager. This may require
|
// Uninstall removes the given service from the OS service manager. This may require
|
||||||
// greater rights. Will return an error if the service is not present.
|
// greater rights. Will return an error if the service is not present.
|
||||||
Uninstall() error
|
Uninstall() error
|
||||||
|
|
||||||
// Opens and returns a system logger. If the user program is running
|
// Opens and returns a system logger. If the user program is running
|
||||||
// interactively rather then as a service, the returned logger will write to
|
// interactively rather then as a service, the returned logger will write to
|
||||||
// os.Stderr. If errs is non-nil errors will be sent on errs as well as
|
// os.Stderr. If errs is non-nil errors will be sent on errs as well as
|
||||||
// returned from Logger's functions.
|
// returned from Logger's functions.
|
||||||
Logger(errs chan<- error) (Logger, error)
|
Logger(errs chan<- error) (Logger, error)
|
||||||
|
|
||||||
// SystemLogger opens and returns a system logger. If errs is non-nil errors
|
// SystemLogger opens and returns a system logger. If errs is non-nil errors
|
||||||
// will be sent on errs as well as returned from Logger's functions.
|
// will be sent on errs as well as returned from Logger's functions.
|
||||||
SystemLogger(errs chan<- error) (Logger, error)
|
SystemLogger(errs chan<- error) (Logger, error)
|
||||||
|
|
||||||
// String displays the name of the service. The display name if present,
|
// String displays the name of the service. The display name if present,
|
||||||
// otherwise the name.
|
// otherwise the name.
|
||||||
String() string
|
String() string
|
||||||
}
|
}
|
||||||
|
|
||||||
// ControlAction list valid string texts to use in Control.
|
// ControlAction list valid string texts to use in Control.
|
||||||
var ControlAction = [5]string{"start", "stop", "restart", "install", "uninstall"}
|
var ControlAction = [5]string{"start", "stop", "restart", "install", "uninstall"}
|
||||||
|
|
||||||
// Control issues control functions to the service from a given action string.
|
// Control issues control functions to the service from a given action string.
|
||||||
func Control(s Service, action string) error {
|
func Control(s Service, action string) error {
|
||||||
var err error
|
var err error
|
||||||
switch action {
|
switch action {
|
||||||
case ControlAction[0]:
|
case ControlAction[0]:
|
||||||
err = s.Start()
|
err = s.Start()
|
||||||
case ControlAction[1]:
|
case ControlAction[1]:
|
||||||
err = s.Stop()
|
err = s.Stop()
|
||||||
case ControlAction[2]:
|
case ControlAction[2]:
|
||||||
err = s.Restart()
|
err = s.Restart()
|
||||||
case ControlAction[3]:
|
case ControlAction[3]:
|
||||||
err = s.Install()
|
err = s.Install()
|
||||||
case ControlAction[4]:
|
case ControlAction[4]:
|
||||||
err = s.Uninstall()
|
err = s.Uninstall()
|
||||||
default:
|
default:
|
||||||
err = fmt.Errorf("Unknown action %s", action)
|
err = fmt.Errorf("Unknown action %s", action)
|
||||||
}
|
}
|
||||||
if err != nil {
|
if err != nil {
|
||||||
return fmt.Errorf("Failed to %s %v: %v", action, s, err)
|
return fmt.Errorf("Failed to %s %v: %v", action, s, err)
|
||||||
}
|
}
|
||||||
return nil
|
return nil
|
||||||
}
|
}
|
||||||
|
|
||||||
// Logger writes to the system log.
|
// Logger writes to the system log.
|
||||||
type Logger interface {
|
type Logger interface {
|
||||||
Error(v ...interface{}) error
|
Error(v ...interface{}) error
|
||||||
Warning(v ...interface{}) error
|
Warning(v ...interface{}) error
|
||||||
Info(v ...interface{}) error
|
Info(v ...interface{}) error
|
||||||
|
|
||||||
Errorf(format string, a ...interface{}) error
|
Errorf(format string, a ...interface{}) error
|
||||||
Warningf(format string, a ...interface{}) error
|
Warningf(format string, a ...interface{}) error
|
||||||
Infof(format string, a ...interface{}) error
|
Infof(format string, a ...interface{}) error
|
||||||
}
|
}
|
||||||
|
|||||||
Reference in New Issue
Block a user