modify import apis for HA+Sharded cluster (#260)

Author: shivaji-kharse

protos/api.v2.proto

@@ -29,8 +29,9 @@ service Dgraph {
   rpc DropNamespace(DropNamespaceRequest) returns (DropNamespaceResponse) {}
   rpc UpdateNamespace(UpdateNamespaceRequest) returns (UpdateNamespaceResponse) {}
   rpc ListNamespaces(ListNamespacesRequest) returns (ListNamespacesResponse) {}
-  rpc InitiatePDirStream (InitiatePDirStreamRequest)    returns (InitiatePDirStreamResponse) {}
-  rpc StreamPDir(stream StreamPDirRequest) returns (StreamPDirResponse) {}
+
+  rpc UpdateExtSnapshotStreamingState(UpdateExtSnapshotStreamingStateRequest) returns (UpdateExtSnapshotStreamingStateResponse) {}
+  rpc StreamExtSnapshot(stream StreamExtSnapshotRequest) returns (StreamExtSnapshotResponse) {}
 }
 
 message PingRequest {}
@@ -161,23 +162,25 @@ message Namespace {
   uint64 id = 2;
 }
 
-message InitiatePDirStreamRequest {}
-
-message InitiatePDirStreamResponse {
-    repeated uint32 groups = 1;
+message UpdateExtSnapshotStreamingStateRequest {
+  bool start = 1;
+  bool finish = 2;
+  bool drop_data = 3;
 }
 
-message StreamPDirRequest {
-  uint32 group_id =1;
-  StreamPacket stream_packet = 2;
+message UpdateExtSnapshotStreamingStateResponse {
+  repeated uint32 groups = 1;
 }
 
-message StreamPDirResponse {
-    bool done = 1;
+message StreamExtSnapshotRequest {
+  uint32 group_id = 1;
+  bool forward = 2;
+  StreamPacket pkt = 3;
 }
 
+message StreamExtSnapshotResponse {}
+
 message StreamPacket {
   bytes data = 1;
   bool done = 2;
 }
-