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service.go
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service.go
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package micro
import (
"os"
"os/signal"
rtime "runtime"
"github.com/go-micro/microwire/v5/client"
log "github.com/go-micro/microwire/v5/logger"
"github.com/go-micro/microwire/v5/server"
signalutil "github.com/go-micro/microwire/v5/util/signal"
)
type service struct {
opts Options
}
func newMicroService(opts ...Option) Service {
options := NewOptions(opts...)
return &service{
opts: *options,
}
}
func (s *service) Name() string {
return s.opts.Server.Options().Name
}
// Init initializes options.
func (s *service) Init(opts ...Option) {
// process options
for _, o := range opts {
o(&s.opts)
}
}
func (s *service) Options() Options {
return s.opts
}
func (s *service) Client() client.Client {
return s.opts.Client
}
func (s *service) Server() server.Server {
return s.opts.Server
}
func (s *service) String() string {
return "micro"
}
func (s *service) Start() error {
for _, fn := range s.opts.BeforeStart {
if err := fn(s); err != nil {
return err
}
}
if err := s.opts.Server.Start(); err != nil {
return err
}
for _, fn := range s.opts.AfterStart {
if err := fn(s); err != nil {
return err
}
}
return nil
}
func (s *service) Stop() error {
var err error
for _, fn := range s.opts.BeforeStop {
if err = fn(s); err != nil {
return err
}
}
if err = s.opts.Server.Stop(); err != nil {
return err
}
for _, fn := range s.opts.AfterStop {
if err = fn(s); err != nil {
return err
}
}
return err
}
func (s *service) Run() (err error) {
logger := s.opts.Logger
// exit when help flag is provided
for _, v := range os.Args[1:] {
if v == "-h" || v == "--help" {
os.Exit(0)
}
}
// 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 func() {
err = s.opts.Profile.Stop()
if err != nil {
logger.Log(log.ErrorLevel, err)
}
}()
}
logger.Logf(log.InfoLevel, "Starting [service] %s", s.Name())
if err = s.Start(); err != nil {
return err
}
ch := make(chan os.Signal, 1)
if s.opts.Signal {
signal.Notify(ch, signalutil.Shutdown()...)
}
select {
// wait on kill signal
case <-ch:
// wait on context cancel
case <-s.opts.Context.Done():
}
return s.Stop()
}