2016-01-02 19:14:56 +00:00
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package micro
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2015-12-20 23:50:16 +00:00
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import (
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"os"
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"os/signal"
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2019-12-08 20:31:16 +00:00
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"runtime"
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2019-09-09 20:17:36 -07:00
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"strings"
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2017-10-09 20:55:03 +08:00
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"sync"
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2015-12-20 23:50:16 +00:00
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"syscall"
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"github.com/micro/go-micro/client"
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2019-06-21 13:36:11 +01:00
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"github.com/micro/go-micro/config/cmd"
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2019-11-06 19:36:04 +00:00
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"github.com/micro/go-micro/debug/profile"
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2019-12-08 20:31:16 +00:00
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"github.com/micro/go-micro/debug/profile/http"
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2019-11-06 19:36:04 +00:00
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"github.com/micro/go-micro/debug/profile/pprof"
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2019-12-07 19:54:29 +00:00
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"github.com/micro/go-micro/debug/service/handler"
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2019-12-18 18:36:42 +00:00
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"github.com/micro/go-micro/debug/stats"
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2019-09-09 20:17:36 -07:00
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"github.com/micro/go-micro/plugin"
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2015-12-20 23:50:16 +00:00
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"github.com/micro/go-micro/server"
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2019-09-09 20:17:36 -07:00
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"github.com/micro/go-micro/util/log"
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2019-11-16 18:52:27 +00:00
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"github.com/micro/go-micro/util/wrapper"
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2015-12-20 23:50:16 +00:00
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)
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type service struct {
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opts Options
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2016-05-06 12:21:41 +01:00
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2017-10-09 15:47:28 +08:00
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once sync.Once
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2015-12-20 23:50:16 +00:00
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}
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func newService(opts ...Option) Service {
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options := newOptions(opts...)
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2019-11-16 18:48:24 +00:00
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// service name
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serviceName := options.Server.Options().Name
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// wrap client to inject From-Service header on any calls
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options.Client = wrapper.FromService(serviceName, options.Client)
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2015-12-20 23:50:16 +00:00
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2019-12-18 18:36:42 +00:00
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// wrap the server to provide handler stats
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options.Server.Init(server.WrapHandler(wrapper.HandlerStats(stats.DefaultStats)))
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2015-12-20 23:50:16 +00:00
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return &service{
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opts: options,
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}
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}
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2019-10-07 08:32:28 +01:00
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func (s *service) Name() string {
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return s.opts.Server.Options().Name
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}
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2016-05-06 12:21:41 +01:00
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// Init initialises options. Additionally it calls cmd.Init
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// which parses command line flags. cmd.Init is only called
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// on first Init.
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2016-01-01 01:16:21 +00:00
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func (s *service) Init(opts ...Option) {
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2017-10-09 15:47:28 +08:00
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// process options
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for _, o := range opts {
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o(&s.opts)
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}
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2017-03-30 17:15:59 +01:00
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2017-10-09 15:47:28 +08:00
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s.once.Do(func() {
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2019-09-09 20:17:36 -07:00
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// setup the plugins
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for _, p := range strings.Split(os.Getenv("MICRO_PLUGIN"), ",") {
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if len(p) == 0 {
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continue
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}
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// load the plugin
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c, err := plugin.Load(p)
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if err != nil {
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log.Fatal(err)
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}
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// initialise the plugin
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if err := plugin.Init(c); err != nil {
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log.Fatal(err)
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}
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}
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2016-05-06 12:21:41 +01:00
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// Initialise the command flags, overriding new service
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2018-03-13 17:51:33 +07:00
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_ = s.opts.Cmd.Init(
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2016-05-06 12:21:41 +01:00
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cmd.Broker(&s.opts.Broker),
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cmd.Registry(&s.opts.Registry),
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cmd.Transport(&s.opts.Transport),
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cmd.Client(&s.opts.Client),
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cmd.Server(&s.opts.Server),
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)
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2017-10-09 15:47:28 +08:00
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})
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2016-01-01 01:16:21 +00:00
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}
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2016-01-02 19:12:17 +00:00
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func (s *service) Options() Options {
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return s.opts
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2016-01-01 01:16:21 +00:00
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}
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2015-12-20 23:50:16 +00:00
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func (s *service) Client() client.Client {
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return s.opts.Client
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}
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func (s *service) Server() server.Server {
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return s.opts.Server
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}
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func (s *service) String() string {
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2019-01-24 13:22:17 +00:00
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return "micro"
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2015-12-20 23:50:16 +00:00
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}
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func (s *service) Start() error {
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2016-01-01 01:16:21 +00:00
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for _, fn := range s.opts.BeforeStart {
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if err := fn(); err != nil {
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return err
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}
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}
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2015-12-20 23:50:16 +00:00
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if err := s.opts.Server.Start(); err != nil {
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return err
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}
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2017-01-07 14:52:23 +00:00
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for _, fn := range s.opts.AfterStart {
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if err := fn(); err != nil {
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return err
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}
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}
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2015-12-20 23:50:16 +00:00
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return nil
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}
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func (s *service) Stop() error {
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2017-01-07 14:52:23 +00:00
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var gerr error
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for _, fn := range s.opts.BeforeStop {
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if err := fn(); err != nil {
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gerr = err
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}
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}
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2015-12-20 23:50:16 +00:00
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if err := s.opts.Server.Stop(); err != nil {
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return err
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}
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2016-01-01 01:16:21 +00:00
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for _, fn := range s.opts.AfterStop {
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if err := fn(); err != nil {
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gerr = err
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}
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}
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2017-01-07 14:52:23 +00:00
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2016-01-01 01:16:21 +00:00
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return gerr
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2015-12-20 23:50:16 +00:00
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}
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func (s *service) Run() error {
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2019-08-06 17:53:14 +01:00
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// register the debug handler
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2019-12-02 14:55:35 +00:00
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s.opts.Server.Handle(
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s.opts.Server.NewHandler(
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handler.DefaultHandler,
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server.InternalHandler(true),
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),
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)
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2019-08-06 17:53:14 +01:00
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2019-11-06 19:36:04 +00:00
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// start the profiler
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// TODO: set as an option to the service, don't just use pprof
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if prof := os.Getenv("MICRO_DEBUG_PROFILE"); len(prof) > 0 {
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2019-12-08 20:31:16 +00:00
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var profiler profile.Profile
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// to view mutex contention
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runtime.SetMutexProfileFraction(5)
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// to view blocking profile
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runtime.SetBlockProfileRate(1)
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switch prof {
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case "http":
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profiler = http.NewProfile()
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default:
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service := s.opts.Server.Options().Name
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version := s.opts.Server.Options().Version
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id := s.opts.Server.Options().Id
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profiler = pprof.NewProfile(
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profile.Name(service + "." + version + "." + id),
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)
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}
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2019-11-06 19:36:04 +00:00
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if err := profiler.Start(); err != nil {
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return err
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}
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defer profiler.Stop()
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}
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2019-12-31 12:07:52 +00:00
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log.Logf("Starting [service] %s", s.Name())
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2015-12-20 23:50:16 +00:00
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if err := s.Start(); err != nil {
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return err
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}
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ch := make(chan os.Signal, 1)
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2019-11-16 03:13:34 -08:00
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if s.opts.Signal {
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signal.Notify(ch, syscall.SIGTERM, syscall.SIGINT, syscall.SIGQUIT)
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}
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2017-01-07 14:52:23 +00:00
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select {
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// wait on kill signal
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case <-ch:
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// wait on context cancel
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case <-s.opts.Context.Done():
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}
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2015-12-20 23:50:16 +00:00
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2018-03-13 17:40:13 +07:00
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return s.Stop()
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2015-12-20 23:50:16 +00:00
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}
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