refactor everything again

rpc-pool.go

@@ -24,19 +24,19 @@ func ToCartId(id string) CartId {
 
 type RemoteGrain struct {
 	*CartClient
-	Id      CartId
-	Address string
+	Id   CartId
+	Host string
 }
 
-func NewRemoteGrain(id CartId, address string) (*RemoteGrain, error) {
-	client, err := CartDial(fmt.Sprintf("%s:1337", address))
+func NewRemoteGrain(id CartId, host string) (*RemoteGrain, error) {
+	client, err := CartDial(fmt.Sprintf("%s:1337", host))
 	if err != nil {
 		return nil, err
 	}
 
 	return &RemoteGrain{
 		Id:         id,
-		Address:    address,
+		Host:       host,
 		CartClient: client,
 	}, nil
 }
@@ -75,7 +75,7 @@ func (p *RemoteGrainPool) findRemoteGrain(id CartId) *RemoteGrain {
 	p.mu.RLock()
 	grain, ok := p.grains[id]
 	p.mu.RUnlock()
-	if !ok || grain == nil {
+	if !ok {
 		return nil
 	}
 	return grain