refactor code structure (#1738)

pkg/simple/client/monitoring/interface.go

@@ -0,0 +1,39 @@
+package monitoring
+
+
+type ClusterQuery struct {
+
+}
+
+type ClusterMetrics struct {
+
+}
+
+type WorkspaceQuery struct {
+
+}
+
+type WorkspaceMetrics struct {
+
+}
+
+type NamespaceQuery struct {
+
+}
+
+type NamespaceMetrics struct {
+
+}
+
+// Interface defines all the abstract behaviors of monitoring
+type Interface interface {
+
+    // Get
+    GetClusterMetrics(query ClusterQuery) ClusterMetrics
+
+    //
+    GetWorkspaceMetrics(query WorkspaceQuery) WorkspaceMetrics
+
+    //
+    GetNamespaceMetrics(query NamespaceQuery) NamespaceMetrics
+}