183 lines
3.4 KiB
Go
183 lines
3.4 KiB
Go
package micro
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import (
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"os"
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"os/signal"
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"strings"
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"sync"
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"syscall"
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"github.com/micro/go-micro/client"
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"github.com/micro/go-micro/config/cmd"
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"github.com/micro/go-micro/debug/handler"
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"github.com/micro/go-micro/debug/profile"
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"github.com/micro/go-micro/debug/profile/pprof"
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"github.com/micro/go-micro/metadata"
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"github.com/micro/go-micro/plugin"
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"github.com/micro/go-micro/server"
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"github.com/micro/go-micro/util/log"
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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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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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}
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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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// 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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// 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 "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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// register the debug handler
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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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// 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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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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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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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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signal.Notify(ch, syscall.SIGTERM, syscall.SIGINT, syscall.SIGQUIT)
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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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