187 lines
3.1 KiB
Go
187 lines
3.1 KiB
Go
package micro
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import (
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"os"
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"os/signal"
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"syscall"
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"time"
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"github.com/micro/go-micro/client"
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"github.com/micro/go-micro/cmd"
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"github.com/micro/go-micro/metadata"
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"github.com/micro/go-micro/server"
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)
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type service struct {
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opts Options
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init chan bool
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}
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func newService(opts ...Option) Service {
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options := newOptions(opts...)
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options.Client = &clientWrapper{
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options.Client,
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metadata.Metadata{
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HeaderPrefix + "From-Service": options.Server.Options().Name,
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},
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}
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return &service{
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opts: options,
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init: make(chan bool),
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}
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}
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func (s *service) run(exit chan bool) {
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if s.opts.RegisterInterval <= time.Duration(0) {
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return
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}
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t := time.NewTicker(s.opts.RegisterInterval)
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for {
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select {
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case <-t.C:
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s.opts.Server.Register()
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case <-exit:
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t.Stop()
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return
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}
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}
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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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// If <-s.init blocks, Init has not been called yet
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// so we can call cmd.Init once.
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select {
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case <-s.init:
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// only 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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default:
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// close init
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close(s.init)
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// We might get more command flags or the action here
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// This is pretty ugly, find a better way
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options := newOptions()
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options.Cmd = s.opts.Cmd
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for _, o := range opts {
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o(&options)
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}
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s.opts.Cmd = options.Cmd
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// Initialise the command flags, overriding new service
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s.opts.Cmd.Init(
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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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}
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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 "go-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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if err := s.opts.Server.Register(); 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.Deregister(); err != nil {
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return err
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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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if err := s.Start(); err != nil {
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return err
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}
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// start reg loop
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ex := make(chan bool)
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go s.run(ex)
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ch := make(chan os.Signal, 1)
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signal.Notify(ch, syscall.SIGTERM, syscall.SIGINT, syscall.SIGKILL)
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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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// exit reg loop
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close(ex)
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if err := s.Stop(); err != nil {
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return err
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}
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return nil
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}
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