Restructure server code, controller now runs in silo

pkg/rpc/server.go

@@ -0,0 +1,51 @@
+/*
+ * Minio Cloud Storage, (C) 2015 Minio, Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package rpc
+
+import (
+	"net/http"
+
+	"github.com/gorilla/rpc/v2"
+	"github.com/gorilla/rpc/v2/json"
+)
+
+// Server rpc server container
+type Server struct {
+	RPCServer *rpc.Server
+}
+
+// RegisterJSONCodec - register standard json codec
+func (s Server) RegisterJSONCodec() {
+	s.RPCServer.RegisterCodec(json.NewCodec(), "application/json")
+}
+
+// RegisterService - register new services
+func (s Server) RegisterService(recv interface{}, name string) {
+	s.RPCServer.RegisterService(recv, name)
+}
+
+// NewServer - provide a new instance of RPC server
+func NewServer() *Server {
+	s := &Server{}
+	s.RPCServer = rpc.NewServer()
+	return s
+}
+
+// ServeHTTP wrapper method for http.Handler interface
+func (s Server) ServeHTTP(w http.ResponseWriter, r *http.Request) {
+	s.RPCServer.ServeHTTP(w, r)
+}