micro/service.go

232 lines
5.0 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"
2020-05-11 19:09:28 +03:00
rtime "runtime"
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
"github.com/micro/go-micro/v2/auth"
"github.com/micro/go-micro/v2/client"
2020-07-14 22:57:13 +03:00
"github.com/micro/go-micro/v2/cmd"
"github.com/micro/go-micro/v2/debug/service/handler"
"github.com/micro/go-micro/v2/debug/stats"
"github.com/micro/go-micro/v2/debug/trace"
"github.com/micro/go-micro/v2/logger"
"github.com/micro/go-micro/v2/plugin"
"github.com/micro/go-micro/v2/server"
"github.com/micro/go-micro/v2/store"
signalutil "github.com/micro/go-micro/v2/util/signal"
"github.com/micro/go-micro/v2/util/wrapper"
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 {
service := new(service)
2015-12-21 02:50:16 +03:00
options := newOptions(opts...)
// service name
serviceName := options.Server.Options().Name
2020-05-24 20:45:57 +03:00
// we pass functions to the wrappers since the values can change during initialisation
2020-04-03 14:27:01 +03:00
authFn := func() auth.Auth { return options.Server.Options().Auth }
2020-05-24 20:45:57 +03:00
cacheFn := func() *client.Cache { return options.Client.Options().Cache }
// wrap client to inject From-Service header on any calls
2020-04-29 17:11:06 +03:00
options.Client = wrapper.FromService(serviceName, options.Client)
2020-01-30 01:43:40 +03:00
options.Client = wrapper.TraceCall(serviceName, trace.DefaultTracer, options.Client)
2020-05-24 20:45:57 +03:00
options.Client = wrapper.CacheClient(cacheFn, options.Client)
2020-05-14 13:25:19 +03:00
options.Client = wrapper.AuthClient(authFn, options.Client)
2020-01-25 01:02:35 +03:00
// pass the services auth namespace to the auth handler so it
// uses this to verify requests, preventing the reliance on the
// insecure Micro-Namespace header.
handlerNS := wrapper.AuthHandlerNamespace(options.Auth.Options().Issuer)
2019-12-18 21:36:42 +03:00
// wrap the server to provide handler stats
2020-01-25 01:02:35 +03:00
options.Server.Init(
server.WrapHandler(wrapper.HandlerStats(stats.DefaultStats)),
2020-01-30 01:43:40 +03:00
server.WrapHandler(wrapper.TraceHandler(trace.DefaultTracer)),
server.WrapHandler(wrapper.AuthHandler(authFn, handlerNS)),
2020-01-25 01:02:35 +03:00
)
// set opts
service.opts = options
return service
2015-12-21 02:50:16 +03:00
}
2019-10-07 10:32:28 +03:00
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.
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 {
logger.Fatal(err)
2019-09-10 06:17:36 +03:00
}
// initialise the plugin
if err := plugin.Init(c); err != nil {
logger.Fatal(err)
2019-09-10 06:17:36 +03:00
}
}
2020-01-19 03:55:01 +03:00
// set cmd name
if len(s.opts.Cmd.App().Name) == 0 {
s.opts.Cmd.App().Name = s.Server().Options().Name
}
2020-07-19 20:20:17 +03:00
// Initialise the command options
2020-02-02 22:49:59 +03:00
if err := s.opts.Cmd.Init(
cmd.Auth(&s.opts.Auth),
cmd.Broker(&s.opts.Broker),
cmd.Registry(&s.opts.Registry),
2020-05-11 19:09:28 +03:00
cmd.Runtime(&s.opts.Runtime),
cmd.Transport(&s.opts.Transport),
cmd.Client(&s.opts.Client),
cmd.Config(&s.opts.Config),
cmd.Server(&s.opts.Server),
2020-05-01 20:05:09 +03:00
cmd.Store(&s.opts.Store),
cmd.Profile(&s.opts.Profile),
2020-02-02 22:49:59 +03:00
); err != nil {
logger.Fatal(err)
2020-02-02 22:49:59 +03:00
}
2020-07-19 20:20:17 +03:00
// execute the command
// TODO: do this in service.Run()
if err := s.opts.Cmd.Run(); err != nil {
logger.Fatal(err)
}
// Explicitly set the table name to the service name
name := s.opts.Cmd.App().Name
2020-05-01 20:24:35 +03:00
s.opts.Store.Init(store.Table(name))
})
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(
2020-05-24 20:45:57 +03:00
handler.NewHandler(s.opts.Client),
server.InternalHandler(true),
),
)
2019-08-06 19:53:14 +03:00
// start the profiler
if s.opts.Profile != nil {
2019-12-08 23:31:16 +03:00
// to view mutex contention
2020-05-11 19:09:28 +03:00
rtime.SetMutexProfileFraction(5)
2019-12-08 23:31:16 +03:00
// to view blocking profile
2020-05-11 19:09:28 +03:00
rtime.SetBlockProfileRate(1)
2019-12-08 23:31:16 +03:00
if err := s.opts.Profile.Start(); err != nil {
return err
}
defer s.opts.Profile.Stop()
}
if logger.V(logger.InfoLevel, logger.DefaultLogger) {
logger.Infof("Starting [service] %s", s.Name())
}
2019-12-31 15:07:52 +03:00
2015-12-21 02:50:16 +03:00
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():
}
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
}