Runtime service implementation (#965)

runtime/runtime.go

@@ -6,6 +6,8 @@ import "time"
 var (
 	// DefaultRuntime is default micro runtime
 	DefaultRuntime Runtime = NewRuntime()
+	// DefaultName is default runtime service name
+	DefaultName = "go.micro.runtime"
 )
 
 // Runtime is a service runtime manager

runtime/service/service.go

@@ -0,0 +1,185 @@
+package service
+
+import (
+	"context"
+	"sync"
+
+	"github.com/micro/go-micro/client"
+	"github.com/micro/go-micro/runtime"
+	pb "github.com/micro/go-micro/runtime/service/proto"
+)
+
+type svc struct {
+	sync.RWMutex
+	options runtime.Options
+	runtime pb.RuntimeService
+}
+
+// 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),
+	}
+}
+
+// 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 {
+	options := runtime.CreateOptions{}
+	// apply requested options
+	for _, o := range opts {
+		o(&options)
+	}
+
+	// runtime service create request
+	req := &pb.CreateRequest{
+		Service: &pb.Service{
+			Name:    svc.Name,
+			Version: svc.Version,
+			Source:  svc.Source,
+		},
+		Options: &pb.CreateOptions{
+			Command: options.Command,
+			Env:     options.Env,
+		},
+	}
+
+	if _, err := s.runtime.Create(context.Background(), req); err != nil {
+		return err
+	}
+
+	return nil
+}
+
+// Get returns the service with the given name from the runtime
+func (s *svc) Get(name string, opts ...runtime.GetOption) ([]*runtime.Service, error) {
+	options := runtime.GetOptions{}
+	// apply requested options
+	for _, o := range opts {
+		o(&options)
+	}
+
+	// runtime service create request
+	req := &pb.GetRequest{
+		Name: name,
+		Options: &pb.GetOptions{
+			Version: options.Version,
+		},
+	}
+
+	resp, err := s.runtime.Get(context.Background(), 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,
+			Path:    service.Path,
+			Exec:    service.Exec,
+		}
+		services = append(services, svc)
+	}
+
+	return services, nil
+}
+
+// Update updates the running service
+func (s *svc) Update(svc *runtime.Service) error {
+	// runtime service create request
+	req := &pb.UpdateRequest{
+		Service: &pb.Service{
+			Name:    svc.Name,
+			Version: svc.Version,
+		},
+	}
+
+	if _, err := s.runtime.Update(context.Background(), req); err != nil {
+		return err
+	}
+
+	return nil
+}
+
+// Delete stops and removes the service from the runtime
+func (s *svc) Delete(svc *runtime.Service) error {
+	// runtime service create request
+	req := &pb.DeleteRequest{
+		Service: &pb.Service{
+			Name:    svc.Name,
+			Version: svc.Version,
+		},
+	}
+
+	if _, err := s.runtime.Delete(context.Background(), req); err != nil {
+		return err
+	}
+
+	return nil
+}
+
+// List lists all services managed by the runtime
+func (s *svc) List() ([]*runtime.Service, error) {
+	// list all services managed by the runtime
+	resp, err := s.runtime.List(context.Background(), &pb.ListRequest{})
+	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,
+			Path:    service.Path,
+			Exec:    service.Exec,
+		}
+		services = append(services, svc)
+	}
+
+	return services, 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"
+}