174 lines
3.2 KiB
Go
174 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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cmd "github.com/unistack-org/micro-config-cmd"
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"github.com/unistack-org/micro/v3/client"
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"github.com/unistack-org/micro/v3/logger"
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"github.com/unistack-org/micro/v3/server"
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"github.com/unistack-org/micro/v3/store"
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signalutil "github.com/unistack-org/micro/v3/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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service := &service{}
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options := newOptions(opts...)
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// set opts
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service.opts = options
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return service
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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 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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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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// Initialise the command options
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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.Runtime(&s.opts.Runtime),
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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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logger.Fatal(err)
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}
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// execute the command
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// TODO: do this in service.Run()
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if err := s.opts.Cmd.Run(); err != nil {
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logger.Fatal(err)
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}
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// Explicitly set the table name to the service name
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name := s.opts.Cmd.App().Name
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s.opts.Store.Init(store.Table(name))
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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 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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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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if err := fn(); err != nil {
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gerr = err
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}
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}
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return gerr
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}
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func (s *service) Run() error {
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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 s.opts.Profile.Stop()
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}
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if logger.V(logger.InfoLevel, logger.DefaultLogger) {
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logger.Infof("Starting [service] %s", s.Name())
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}
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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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