micro/runtime/service/service.go

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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"
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)
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 {
options := runtime.CreateOptions{}
// apply requested options
for _, o := range opts {
o(&options)
}
// set the default source from MICRO_RUNTIME_SOURCE
if len(svc.Source) == 0 {
svc.Source = s.options.Source
}
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// runtime service create request
req := &pb.CreateRequest{
Service: &pb.Service{
Name: svc.Name,
Version: svc.Version,
Source: svc.Source,
Metadata: svc.Metadata,
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},
Options: &pb.CreateOptions{
Command: options.Command,
Env: options.Env,
},
}
if _, err := s.runtime.Create(context.Background(), req); err != nil {
return err
}
return nil
}
// Read returns the service with the given name from the runtime
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func (s *svc) Read(opts ...runtime.ReadOption) ([]*runtime.Service, error) {
options := runtime.ReadOptions{}
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// apply requested options
for _, o := range opts {
o(&options)
}
// runtime service create request
req := &pb.ReadRequest{
Options: &pb.ReadOptions{
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Service: options.Service,
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Version: options.Version,
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Type: options.Type,
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},
}
resp, err := s.runtime.Read(context.Background(), req)
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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,
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}
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,
Metadata: service.Metadata,
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}
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"
}
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// 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),
}
}