mirror of
https://github.com/go-micro/go-micro.git
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177 lines
3.2 KiB
Go
177 lines
3.2 KiB
Go
package micro
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import (
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"os"
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"os/signal"
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rtime "runtime"
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"sync"
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"go-micro.dev/v5/client"
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log "go-micro.dev/v5/logger"
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"go-micro.dev/v5/server"
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"go-micro.dev/v5/store"
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"go-micro.dev/v5/util/cmd"
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signalutil "go-micro.dev/v5/util/signal"
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)
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type service struct {
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opts Options
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once sync.Once
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}
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func newService(opts ...Option) Service {
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return &service{
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opts: newOptions(opts...),
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}
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}
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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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// Init initializes 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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func (s *service) Init(opts ...Option) {
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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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s.once.Do(func() {
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// set cmd name
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if len(s.opts.Cmd.App().Name) == 0 {
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s.opts.Cmd.App().Name = s.Server().Options().Name
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}
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// Initialize the command flags, overriding new service
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if err := s.opts.Cmd.Init(
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cmd.Auth(&s.opts.Auth),
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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.Config(&s.opts.Config),
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cmd.Server(&s.opts.Server),
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cmd.Store(&s.opts.Store),
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cmd.Profile(&s.opts.Profile),
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); err != nil {
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s.opts.Logger.Log(log.FatalLevel, err)
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}
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// If the store has no Table set, fallback to the
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// services name
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if len(s.opts.Store.Options().Table) == 0 {
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name := s.opts.Cmd.App().Name
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err := s.opts.Store.Init(store.Table(name))
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if err != nil {
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s.opts.Logger.Log(log.FatalLevel, err)
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}
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}
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})
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}
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func (s *service) Options() Options {
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return s.opts
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}
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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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return "micro"
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}
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func (s *service) Start() error {
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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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if err := s.opts.Server.Start(); err != nil {
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return err
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}
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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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return nil
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}
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func (s *service) Stop() error {
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var err error
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for _, fn := range s.opts.BeforeStop {
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err = fn()
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}
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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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for _, fn := range s.opts.AfterStop {
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err = fn()
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}
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return err
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}
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func (s *service) Run() (err error) {
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logger := s.opts.Logger
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// exit when help flag is provided
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for _, v := range os.Args[1:] {
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if v == "-h" || v == "--help" {
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os.Exit(0)
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}
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}
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// start the profiler
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if s.opts.Profile != nil {
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// to view mutex contention
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rtime.SetMutexProfileFraction(5)
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// to view blocking profile
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rtime.SetBlockProfileRate(1)
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if err = s.opts.Profile.Start(); err != nil {
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return err
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}
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defer func() {
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if nerr := s.opts.Profile.Stop(); nerr != nil {
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logger.Log(log.ErrorLevel, nerr)
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}
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}()
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}
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logger.Logf(log.InfoLevel, "Starting [service] %s", s.Name())
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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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if s.opts.Signal {
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signal.Notify(ch, signalutil.Shutdown()...)
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}
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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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return s.Stop()
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}
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