micro/service.go

162 lines
2.8 KiB
Go
Raw Normal View History

2016-01-02 22:14:56 +03:00
package micro
2015-12-21 02:50:16 +03:00
import (
"os"
"os/signal"
2019-09-10 06:17:36 +03:00
"strings"
2017-10-09 15:55:03 +03:00
"sync"
2015-12-21 02:50:16 +03:00
"syscall"
"github.com/micro/go-micro/client"
2019-06-21 15:36:11 +03:00
"github.com/micro/go-micro/config/cmd"
2019-08-06 19:53:14 +03:00
"github.com/micro/go-micro/debug/handler"
2016-01-28 20:55:28 +03:00
"github.com/micro/go-micro/metadata"
2019-09-10 06:17:36 +03:00
"github.com/micro/go-micro/plugin"
2015-12-21 02:50:16 +03:00
"github.com/micro/go-micro/server"
2019-09-10 06:17:36 +03:00
"github.com/micro/go-micro/util/log"
2015-12-21 02:50:16 +03:00
)
type service struct {
opts Options
once sync.Once
2015-12-21 02:50:16 +03:00
}
func newService(opts ...Option) Service {
options := newOptions(opts...)
2015-12-23 03:02:42 +03:00
options.Client = &clientWrapper{
2015-12-21 02:50:16 +03:00
options.Client,
2016-01-28 20:55:28 +03:00
metadata.Metadata{
2016-01-01 04:16:21 +03:00
HeaderPrefix + "From-Service": options.Server.Options().Name,
2015-12-21 02:50:16 +03:00
},
}
return &service{
opts: options,
}
}
// Init initialises options. Additionally it calls cmd.Init
// which parses command line flags. cmd.Init is only called
// on first Init.
2016-01-01 04:16:21 +03:00
func (s *service) Init(opts ...Option) {
// process options
for _, o := range opts {
o(&s.opts)
}
s.once.Do(func() {
2019-09-10 06:17:36 +03:00
// setup the plugins
for _, p := range strings.Split(os.Getenv("MICRO_PLUGIN"), ",") {
if len(p) == 0 {
continue
}
// load the plugin
c, err := plugin.Load(p)
if err != nil {
log.Fatal(err)
}
// initialise the plugin
if err := plugin.Init(c); err != nil {
log.Fatal(err)
}
}
// Initialise the command flags, overriding new service
_ = s.opts.Cmd.Init(
cmd.Broker(&s.opts.Broker),
cmd.Registry(&s.opts.Registry),
cmd.Transport(&s.opts.Transport),
cmd.Client(&s.opts.Client),
cmd.Server(&s.opts.Server),
)
})
2016-01-01 04:16:21 +03:00
}
2016-01-02 22:12:17 +03:00
func (s *service) Options() Options {
return s.opts
2016-01-01 04:16:21 +03:00
}
2015-12-21 02:50:16 +03:00
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 {
2019-01-24 16:22:17 +03:00
return "micro"
2015-12-21 02:50:16 +03:00
}
func (s *service) Start() error {
2016-01-01 04:16:21 +03:00
for _, fn := range s.opts.BeforeStart {
if err := fn(); err != nil {
return err
}
}
2015-12-21 02:50:16 +03:00
if err := s.opts.Server.Start(); err != nil {
return err
}
for _, fn := range s.opts.AfterStart {
if err := fn(); err != nil {
return err
}
}
2015-12-21 02:50:16 +03:00
return nil
}
func (s *service) Stop() error {
var gerr error
for _, fn := range s.opts.BeforeStop {
if err := fn(); err != nil {
gerr = err
}
}
2015-12-21 02:50:16 +03:00
if err := s.opts.Server.Stop(); err != nil {
return err
}
2016-01-01 04:16:21 +03:00
for _, fn := range s.opts.AfterStop {
if err := fn(); err != nil {
gerr = err
}
}
2016-01-01 04:16:21 +03:00
return gerr
2015-12-21 02:50:16 +03:00
}
func (s *service) Run() error {
2019-08-06 19:53:14 +03:00
// register the debug handler
s.opts.Server.Handle(
s.opts.Server.NewHandler(
handler.DefaultHandler,
server.InternalHandler(true),
),
)
2015-12-21 02:50:16 +03:00
if err := s.Start(); err != nil {
return err
}
ch := make(chan os.Signal, 1)
signal.Notify(ch, syscall.SIGTERM, syscall.SIGINT, syscall.SIGQUIT)
select {
// wait on kill signal
case <-ch:
// wait on context cancel
case <-s.opts.Context.Done():
}
2015-12-21 02:50:16 +03:00
2018-03-13 13:40:13 +03:00
return s.Stop()
2015-12-21 02:50:16 +03:00
}