package service import ( "context" "sync" "github.com/micro/go-micro/v2/client" "github.com/micro/go-micro/v2/runtime" pb "github.com/micro/go-micro/v2/runtime/service/proto" ) type svc struct { sync.RWMutex options runtime.Options runtime pb.RuntimeService } // Init initializes runtime with given options func (s *svc) Init(opts ...runtime.Option) error { s.Lock() defer s.Unlock() for _, o := range opts { o(&s.options) } return nil } // Create registers a service in the runtime func (s *svc) Create(svc *runtime.Service, opts ...runtime.CreateOption) error { var options runtime.CreateOptions for _, o := range opts { o(&options) } if options.Context == nil { options.Context = context.Background() } // set the default source from MICRO_RUNTIME_SOURCE if len(svc.Source) == 0 { svc.Source = s.options.Source } // runtime service create request req := &pb.CreateRequest{ Service: &pb.Service{ Name: svc.Name, Version: svc.Version, Source: svc.Source, Metadata: svc.Metadata, }, Options: &pb.CreateOptions{ Command: options.Command, Args: options.Args, Env: options.Env, Type: options.Type, Image: options.Image, }, } if _, err := s.runtime.Create(options.Context, req); err != nil { return err } return nil } func (s *svc) Logs(service *runtime.Service, opts ...runtime.LogsOption) (runtime.LogStream, error) { var options runtime.LogsOptions for _, o := range opts { o(&options) } if options.Context == nil { options.Context = context.Background() } ls, err := s.runtime.Logs(options.Context, &pb.LogsRequest{ Service: service.Name, Stream: options.Stream, Count: options.Count, }) if err != nil { return nil, err } logStream := &serviceLogStream{ service: service.Name, stream: make(chan runtime.LogRecord), stop: make(chan bool), } go func() { for { select { // @todo this never seems to return, investigate case <-ls.Context().Done(): logStream.Stop() } } }() go func() { for { select { // @todo this never seems to return, investigate case <-ls.Context().Done(): return case _, ok := <-logStream.stream: if !ok { return } default: record := pb.LogRecord{} err := ls.RecvMsg(&record) if err != nil { logStream.Stop() return } logStream.stream <- runtime.LogRecord{ Message: record.GetMessage(), Metadata: record.GetMetadata(), } } } }() return logStream, nil } type serviceLogStream struct { service string stream chan runtime.LogRecord sync.Mutex stop chan bool err error } func (l *serviceLogStream) Error() error { return l.err } func (l *serviceLogStream) Chan() chan runtime.LogRecord { return l.stream } func (l *serviceLogStream) Stop() error { l.Lock() defer l.Unlock() select { case <-l.stop: return nil default: close(l.stream) close(l.stop) } return nil } // Read returns the service with the given name from the runtime func (s *svc) Read(opts ...runtime.ReadOption) ([]*runtime.Service, error) { var options runtime.ReadOptions for _, o := range opts { o(&options) } if options.Context == nil { options.Context = context.Background() } // runtime service create request req := &pb.ReadRequest{ Options: &pb.ReadOptions{ Service: options.Service, Version: options.Version, Type: options.Type, }, } resp, err := s.runtime.Read(options.Context, req) if err != nil { return nil, err } services := make([]*runtime.Service, 0, len(resp.Services)) for _, service := range resp.Services { svc := &runtime.Service{ Name: service.Name, Version: service.Version, Source: service.Source, Metadata: service.Metadata, } services = append(services, svc) } return services, nil } // Update updates the running service func (s *svc) Update(svc *runtime.Service, opts ...runtime.UpdateOption) error { var options runtime.UpdateOptions for _, o := range opts { o(&options) } if options.Context == nil { options.Context = context.Background() } // runtime service create request req := &pb.UpdateRequest{ Service: &pb.Service{ Name: svc.Name, Version: svc.Version, Source: svc.Source, Metadata: svc.Metadata, }, } if _, err := s.runtime.Update(options.Context, req); err != nil { return err } return nil } // Delete stops and removes the service from the runtime func (s *svc) Delete(svc *runtime.Service, opts ...runtime.DeleteOption) error { var options runtime.DeleteOptions for _, o := range opts { o(&options) } if options.Context == nil { options.Context = context.Background() } // runtime service create request req := &pb.DeleteRequest{ Service: &pb.Service{ Name: svc.Name, Version: svc.Version, Source: svc.Source, Metadata: svc.Metadata, }, } if _, err := s.runtime.Delete(options.Context, req); err != nil { return err } return nil } // Start starts the runtime func (s *svc) Start() error { // NOTE: nothing to be done here return nil } // Stop stops the runtime func (s *svc) Stop() error { // NOTE: nothing to be done here return nil } // Returns the runtime service implementation func (s *svc) String() string { return "service" } // NewRuntime creates new service runtime and returns it func NewRuntime(opts ...runtime.Option) runtime.Runtime { // get default options options := runtime.Options{} // apply requested options for _, o := range opts { o(&options) } // create default client cli := client.DefaultClient return &svc{ options: options, runtime: pb.NewRuntimeService(runtime.DefaultName, cli), } }