// Copyright 2023 Greptime Team
//
// 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.

syntax = "proto3";

package greptime.v1.meta;

option go_package = "github.com/GreptimeTeam/greptime-proto/go/greptime/v1/meta";

import "greptime/v1/meta/common.proto";
import "greptime/v1/meta/store.proto";

// Cluster service is used for communication between meta nodes.
service Cluster {
  // Batch get kvs by input keys from leader's in_memory kv store.
  rpc BatchGet(BatchGetRequest) returns (BatchGetResponse);

  // Range get the kvs from leader's in_memory kv store.
  rpc Range(RangeRequest) returns (RangeResponse);

  // Returns all the peers of metasrv.
  rpc MetasrvPeers(MetasrvPeersRequest) returns (MetasrvPeersResponse);
}

message MetasrvPeersRequest { RequestHeader header = 1; }

message MetasrvPeersResponse {
  ResponseHeader header = 1;

  MetasrvNodeInfo leader = 2;
  repeated MetasrvNodeInfo followers = 3;
}

message MetasrvNodeInfo {
  Peer peer = 1;
  string version = 2;
  string git_commit = 3;
  // The node start timestamp in milliseconds.
  uint64 start_time_ms = 4;
}
