refactor

1 files changed, 122 insertions, 0 deletions

diff --git a/service/rpc/service.go b/service/rpc/service.go
new file mode 100644
index 00000000..ce1e3351
--- /dev/null
+++ b/service/rpc/service.go
@@ -0,0 +1,122 @@
+package rpc
+
+import (
+	"errors"
+	"github.com/spiral/goridge"
+	"github.com/spiral/roadrunner/service"
+	"net/rpc"
+	"sync"
+)
+
+// Name contains default service name.
+const Name = "rpc"
+
+// Service is RPC service.
+type Service struct {
+	cfg  *config
+	stop chan interface{}
+	rpc  *rpc.Server
+
+	mu      sync.Mutex
+	serving bool
+}
+
+// Configure must return configure service and return true if service hasStatus enabled. Must return error in case of
+// misconfiguration. Services must not be used without proper configuration pushed first.
+func (s *Service) Configure(cfg service.Config, reg service.Container) (enabled bool, err error) {
+	config := &config{}
+	if err := cfg.Unmarshal(config); err != nil {
+		return false, err
+	}
+
+	if !config.Enable {
+		return false, nil
+	}
+
+	s.cfg = config
+	s.rpc = rpc.NewServer()
+
+	return true, nil
+}
+
+// Serve serves the service.
+func (s *Service) Serve() error {
+	if s.rpc == nil {
+		return errors.New("RPC service is not configured")
+	}
+
+	s.mu.Lock()
+	s.serving = true
+	s.stop = make(chan interface{})
+	s.mu.Unlock()
+
+	ln, err := s.cfg.listener()
+	if err != nil {
+		return err
+	}
+	defer ln.Close()
+
+	go func() {
+		for {
+			select {
+			case <-s.stop:
+				break
+			default:
+				conn, err := ln.Accept()
+				if err != nil {
+					continue
+				}
+
+				go s.rpc.ServeCodec(goridge.NewCodec(conn))
+			}
+		}
+	}()
+
+	<-s.stop
+
+	s.mu.Lock()
+	s.serving = false
+	s.mu.Unlock()
+
+	return nil
+}
+
+// Stop stops the service.
+func (s *Service) Stop() {
+	s.mu.Lock()
+	defer s.mu.Unlock()
+
+	if s.serving {
+		close(s.stop)
+	}
+}
+
+// Register publishes in the server the set of methods of the
+// receiver value that satisfy the following conditions:
+//	- exported method of exported type
+//	- two arguments, both of exported type
+//	- the second argument is a pointer
+//	- one return value, of type error
+// It returns an error if the receiver is not an exported type or has
+// no suitable methods. It also logs the error using package log.
+func (s *Service) Register(name string, rcvr interface{}) error {
+	if s.rpc == nil {
+		return errors.New("RPC service is not configured")
+	}
+
+	return s.rpc.RegisterName(name, rcvr)
+}
+
+// Client creates new RPC client.
+func (s *Service) Client() (*rpc.Client, error) {
+	if s.cfg == nil {
+		return nil, errors.New("RPC service is not configured")
+	}
+
+	conn, err := s.cfg.dialer()
+	if err != nil {
+		return nil, err
+	}
+
+	return rpc.NewClientWithCodec(goridge.NewClientCodec(conn)), nil
+}