Implement a new Donut service on server side

donut-rpc.go

@@ -0,0 +1,67 @@
+/*
+ * 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 main
+
+import (
+	"net/http"
+	"runtime"
+)
+
+type donutRPCService struct{}
+
+func (s *donutRPCService) ListNodes(r *http.Request, arg *DonutArg, rep *ListNodesRep) error {
+	rep.Nodes = []struct {
+		Hostname string `json:"hostname"`
+		Address  string `json:"address"`
+		ID       string `json:"id"`
+	}{
+		{
+			Hostname: "localhost",
+			Address:  "192.168.1.102:9000",
+			ID:       "6F27CB16-493D-40FA-B035-2A2E5646066A",
+		},
+	}
+	return nil
+}
+
+// Usage bytes
+const (
+	PB = 1024 * 1024 * 1024 * 1024
+	TB = 1024 * 1024 * 1024 * 1024
+	GB = 1024 * 1024 * 1024
+)
+
+func (s *donutRPCService) StorageStats(r *http.Request, arg *DonutArg, rep *StorageStatsRep) error {
+	rep.Buckets = []BucketStats{{"bucket1", 4 * TB}, {"bucket2", 120 * TB}, {"bucket3", 45 * TB}}
+	return nil
+}
+
+func (s *donutRPCService) RebalanceStats(r *http.Request, arg *DonutArg, rep *RebalanceStatsRep) error {
+	rep.State = make(map[string]string)
+	rep.State["bucket1/obj1"] = "inProgress"
+	rep.State["bucket2/obj2"] = "finished"
+	rep.State["bucket3/obj3"] = "errored"
+	rep.State["bucket4/obj4"] = "unknownState"
+	return nil
+}
+
+func (s *donutRPCService) Version(r *http.Request, arg *ServerArg, rep *DonutVersionRep) error {
+	rep.Version = "0.1.0"
+	rep.Architecture = runtime.GOARCH
+	rep.OperatingSystem = runtime.GOOS
+	return nil
+}