feat: add BatchGet method in Store service (#7)

* feat: add BatchGet method in Store service

* generated go code

proto/greptime/v1/meta/cluster.proto

@@ -15,15 +15,3 @@ service Cluster {
   // Range get the kvs from leader's in_memory kv store.
   rpc Range(RangeRequest) returns (RangeResponse);
 }
-
-message BatchGetRequest {
-  RequestHeader header = 1;
-
-  repeated bytes keys = 2;
-}
-
-message BatchGetResponse {
-  ResponseHeader header = 1;
-
-  repeated KeyValue kvs = 2;
-}

proto/greptime/v1/meta/store.proto

@@ -13,6 +13,9 @@ service Store {
   // Put puts the given key into the key-value store.
   rpc Put(PutRequest) returns (PutResponse);
 
+  // BatchGet atomically get values by the given keys from the key-value store.
+  rpc BatchGet(BatchGetRequest) returns (BatchGetResponse);
+
   // BatchPut atomically puts the given keys into the key-value store.
   rpc BatchPut(BatchPutRequest) returns (BatchPutResponse);
 
@@ -77,6 +80,18 @@ message PutResponse {
   KeyValue prev_kv = 2;
 }
 
+message BatchGetRequest {
+  RequestHeader header = 1;
+
+  repeated bytes keys = 2;
+}
+
+message BatchGetResponse {
+  ResponseHeader header = 1;
+
+  repeated KeyValue kvs = 2;
+}
+
 message BatchPutRequest {
   RequestHeader header = 1;