micro/service.go

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package micro
import (
"fmt"
rtime "runtime"
"sync"
"github.com/unistack-org/micro/v3/auth"
"github.com/unistack-org/micro/v3/broker"
"github.com/unistack-org/micro/v3/client"
"github.com/unistack-org/micro/v3/config"
"github.com/unistack-org/micro/v3/logger"
"github.com/unistack-org/micro/v3/network/transport"
"github.com/unistack-org/micro/v3/registry"
"github.com/unistack-org/micro/v3/router"
"github.com/unistack-org/micro/v3/server"
"github.com/unistack-org/micro/v3/store"
)
type service struct {
opts Options
sync.RWMutex
// once sync.Once
}
func newService(opts ...Option) Service {
service := &service{opts: NewOptions(opts...)}
return service
}
func (s *service) Name() string {
return s.opts.Server.Options().Name
}
// Init initialises options. Additionally it calls cmd.Init
// which parses command line flags. cmd.Init is only called
// on first Init.
func (s *service) Init(opts ...Option) error {
// process options
for _, o := range opts {
o(&s.opts)
}
if s.opts.Cmd != nil {
// set cmd name
if len(s.opts.Cmd.App().Name) == 0 {
s.opts.Cmd.App().Name = s.Server().Options().Name
}
// Initialise the command options
if err := s.opts.Cmd.Init(); err != nil {
return err
}
}
if s.opts.Logger != nil {
if err := s.opts.Logger.Init(
logger.WithContext(s.opts.Context),
); err != nil {
return err
}
}
if s.opts.Registry != nil {
if err := s.opts.Registry.Init(
registry.Context(s.opts.Context),
); err != nil {
return err
}
}
if s.opts.Broker != nil {
if err := s.opts.Broker.Init(
broker.Context(s.opts.Context),
); err != nil {
return err
}
}
if s.opts.Transport != nil {
if err := s.opts.Transport.Init(
transport.Context(s.opts.Context),
); err != nil {
return err
}
}
if s.opts.Store != nil {
if err := s.opts.Store.Init(
store.Context(s.opts.Context),
); err != nil {
return err
}
}
if s.opts.Server != nil {
if err := s.opts.Server.Init(
server.Context(s.opts.Context),
); err != nil {
return err
}
}
if s.opts.Client != nil {
if err := s.opts.Client.Init(
client.Context(s.opts.Context),
); err != nil {
return err
}
}
return nil
}
func (s *service) Options() Options {
return s.opts
}
func (s *service) Broker() broker.Broker {
return s.opts.Broker
}
func (s *service) Client() client.Client {
return s.opts.Client
}
func (s *service) Server() server.Server {
return s.opts.Server
}
func (s *service) Store() store.Store {
return s.opts.Store
}
func (s *service) Registry() registry.Registry {
return s.opts.Registry
}
func (s *service) Logger() logger.Logger {
return s.opts.Logger
}
func (s *service) Transport() transport.Transport {
return s.opts.Transport
}
func (s *service) Config() config.Config {
return s.opts.Config
}
func (s *service) Auth() auth.Auth {
return s.opts.Auth
}
func (s *service) Router() router.Router {
return s.opts.Router
}
func (s *service) String() string {
return "micro"
}
func (s *service) Start() error {
var err error
s.RLock()
config := s.opts
s.RUnlock()
if config.Logger.V(logger.InfoLevel) {
config.Logger.Info("Starting [service] %s", s.Name())
}
for _, fn := range s.opts.BeforeStart {
if err = fn(); err != nil {
return err
}
}
if s.opts.Server == nil {
return fmt.Errorf("cant start nil server")
}
if s.opts.Registry != nil {
if err := s.opts.Registry.Connect(s.opts.Context); err != nil {
return err
}
}
if s.opts.Broker != nil {
if err := s.opts.Broker.Connect(s.opts.Context); err != nil {
return err
}
}
if s.opts.Store != nil {
if err := s.opts.Store.Connect(s.opts.Context); err != nil {
return err
}
}
if err = s.opts.Server.Start(); err != nil {
return err
}
for _, fn := range s.opts.AfterStart {
if err = fn(); err != nil {
return err
}
}
return nil
}
func (s *service) Stop() error {
s.RLock()
config := s.opts
s.RUnlock()
if config.Logger.V(logger.InfoLevel) {
config.Logger.Info("Stoppping [service] %s", s.Name())
}
var err error
for _, fn := range s.opts.BeforeStop {
if err = fn(); err != nil {
return err
}
}
if err = s.opts.Server.Stop(); err != nil {
return err
}
for _, fn := range s.opts.AfterStop {
if err = fn(); err != nil {
return err
}
}
if s.opts.Registry != nil {
if err := s.opts.Registry.Disconnect(s.opts.Context); err != nil {
return err
}
}
if s.opts.Broker != nil {
if err := s.opts.Broker.Disconnect(s.opts.Context); err != nil {
return err
}
}
if s.opts.Store != nil {
if err := s.opts.Store.Disconnect(s.opts.Context); err != nil {
return err
}
}
return nil
}
func (s *service) Run() error {
// start the profiler
if s.opts.Profile != nil {
// to view mutex contention
rtime.SetMutexProfileFraction(5)
// to view blocking profile
rtime.SetBlockProfileRate(1)
if err := s.opts.Profile.Start(); err != nil {
return err
}
defer s.opts.Profile.Stop()
}
if s.opts.Cmd != nil {
if err := s.opts.Cmd.Run(); err != nil {
return err
}
}
if err := s.Start(); err != nil {
return err
}
// wait on context cancel
<-s.opts.Context.Done()
return s.Stop()
}