From 26a50f4069f50c37d65b45e0d39ae0cb42de5425 Mon Sep 17 00:00:00 2001
From: Weny Xu <wenymedia@gmail.com>
Date: Mon, 13 Apr 2026 16:10:25 +0800
Subject: [PATCH] feat: add staging leader (#313)

Signed-off-by: WenyXu <wenymedia@gmail.com>
---
 c++/greptime/v1/meta/heartbeat.pb.cc          |  20 ++++---
 c++/greptime/v1/meta/heartbeat.pb.h           |   3 +-
 go/greptime/v1/meta/heartbeat.pb.go           |  43 ++++++++------
 .../greptime/v1/meta/HeartbeatOuterClass.java |  54 ++++++++++++------
 proto/greptime/v1/meta/heartbeat.proto        |   2 +
 src/generated/greptime.v1.meta.rs             |   4 ++
 src/generated/greptime_grpc_desc.bin          | Bin 183792 -> 183886 bytes
 7 files changed, 79 insertions(+), 47 deletions(-)

diff --git a/c++/greptime/v1/meta/heartbeat.pb.cc b/c++/greptime/v1/meta/heartbeat.pb.cc
index 5483817..0ec63f2 100644
--- a/c++/greptime/v1/meta/heartbeat.pb.cc
+++ b/c++/greptime/v1/meta/heartbeat.pb.cc
@@ -707,22 +707,23 @@ const char descriptor_table_protodef_greptime_2fv1_2fmeta_2fheartbeat_2eproto[]
   ".greptime.v1.meta.MailboxMessageHeader\022\n"
   "\n\002id\030\001 \001(\004\022\017\n\007subject\030\002 \001(\t\022\014\n\004from\030\003 \001("
   "\t\022\n\n\002to\030\004 \001(\t\022\030\n\020timestamp_millis\030\005 \001(\003\022"
-  "\016\n\004json\030\006 \001(\tH\000B\t\n\007payload*=\n\nRegionRole"
+  "\016\n\004json\030\006 \001(\tH\000B\t\n\007payload*P\n\nRegionRole"
   "\022\n\n\006Leader\020\000\022\014\n\010Follower\020\001\022\025\n\021Downgradin"
-  "gLeader\020\0022\277\001\n\tHeartbeat\022Z\n\tHeartbeat\022\".g"
-  "reptime.v1.meta.HeartbeatRequest\032#.grept"
-  "ime.v1.meta.HeartbeatResponse\"\000(\0010\001\022V\n\tA"
-  "skLeader\022\".greptime.v1.meta.AskLeaderReq"
-  "uest\032#.greptime.v1.meta.AskLeaderRespons"
-  "e\"\000B<Z:github.com/GreptimeTeam/greptime-"
-  "proto/go/greptime/v1/metab\006proto3"
+  "gLeader\020\002\022\021\n\rStagingLeader\020\0032\277\001\n\tHeartbe"
+  "at\022Z\n\tHeartbeat\022\".greptime.v1.meta.Heart"
+  "beatRequest\032#.greptime.v1.meta.Heartbeat"
+  "Response\"\000(\0010\001\022V\n\tAskLeader\022\".greptime.v"
+  "1.meta.AskLeaderRequest\032#.greptime.v1.me"
+  "ta.AskLeaderResponse\"\000B<Z:github.com/Gre"
+  "ptimeTeam/greptime-proto/go/greptime/v1/"
+  "metab\006proto3"
   ;
 static const ::_pbi::DescriptorTable* const descriptor_table_greptime_2fv1_2fmeta_2fheartbeat_2eproto_deps[1] = {
   &::descriptor_table_greptime_2fv1_2fmeta_2fcommon_2eproto,
 };
 static ::_pbi::once_flag descriptor_table_greptime_2fv1_2fmeta_2fheartbeat_2eproto_once;
 const ::_pbi::DescriptorTable descriptor_table_greptime_2fv1_2fmeta_2fheartbeat_2eproto = {
-    false, false, 3393, descriptor_table_protodef_greptime_2fv1_2fmeta_2fheartbeat_2eproto,
+    false, false, 3412, descriptor_table_protodef_greptime_2fv1_2fmeta_2fheartbeat_2eproto,
     "greptime/v1/meta/heartbeat.proto",
     &descriptor_table_greptime_2fv1_2fmeta_2fheartbeat_2eproto_once, descriptor_table_greptime_2fv1_2fmeta_2fheartbeat_2eproto_deps, 1, 22,
     schemas, file_default_instances, TableStruct_greptime_2fv1_2fmeta_2fheartbeat_2eproto::offsets,
@@ -747,6 +748,7 @@ bool RegionRole_IsValid(int value) {
     case 0:
     case 1:
     case 2:
+    case 3:
       return true;
     default:
       return false;
diff --git a/c++/greptime/v1/meta/heartbeat.pb.h b/c++/greptime/v1/meta/heartbeat.pb.h
index 95d967c..c978272 100644
--- a/c++/greptime/v1/meta/heartbeat.pb.h
+++ b/c++/greptime/v1/meta/heartbeat.pb.h
@@ -153,12 +153,13 @@ enum RegionRole : int {
   Leader = 0,
   Follower = 1,
   DowngradingLeader = 2,
+  StagingLeader = 3,
   RegionRole_INT_MIN_SENTINEL_DO_NOT_USE_ = std::numeric_limits<int32_t>::min(),
   RegionRole_INT_MAX_SENTINEL_DO_NOT_USE_ = std::numeric_limits<int32_t>::max()
 };
 bool RegionRole_IsValid(int value);
 constexpr RegionRole RegionRole_MIN = Leader;
-constexpr RegionRole RegionRole_MAX = DowngradingLeader;
+constexpr RegionRole RegionRole_MAX = StagingLeader;
 constexpr int RegionRole_ARRAYSIZE = RegionRole_MAX + 1;
 
 const ::PROTOBUF_NAMESPACE_ID::EnumDescriptor* RegionRole_descriptor();
diff --git a/go/greptime/v1/meta/heartbeat.pb.go b/go/greptime/v1/meta/heartbeat.pb.go
index aad4d05..a1d2af9 100644
--- a/go/greptime/v1/meta/heartbeat.pb.go
+++ b/go/greptime/v1/meta/heartbeat.pb.go
@@ -47,6 +47,8 @@ const (
 	// This role is used to prevent the region from being written during the
 	// downgrade process.
 	RegionRole_DowngradingLeader RegionRole = 2
+	// A leader under staging mode.
+	RegionRole_StagingLeader RegionRole = 3
 )
 
 // Enum value maps for RegionRole.
@@ -55,11 +57,13 @@ var (
 		0: "Leader",
 		1: "Follower",
 		2: "DowngradingLeader",
+		3: "StagingLeader",
 	}
 	RegionRole_value = map[string]int32{
 		"Leader":            0,
 		"Follower":          1,
 		"DowngradingLeader": 2,
+		"StagingLeader":     3,
 	}
 )
 
@@ -1575,28 +1579,29 @@ var file_greptime_v1_meta_heartbeat_proto_rawDesc = []byte{
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+	0x06, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x33,
 }
 
 var (
diff --git a/java/src/main/java/greptime/v1/meta/HeartbeatOuterClass.java b/java/src/main/java/greptime/v1/meta/HeartbeatOuterClass.java
index 02adee9..5a227aa 100644
--- a/java/src/main/java/greptime/v1/meta/HeartbeatOuterClass.java
+++ b/java/src/main/java/greptime/v1/meta/HeartbeatOuterClass.java
@@ -46,6 +46,14 @@ public final class HeartbeatOuterClass {
      * <code>DowngradingLeader = 2;</code>
      */
     DowngradingLeader(2),
+    /**
+     * <pre>
+     * A leader under staging mode.
+     * </pre>
+     *
+     * <code>StagingLeader = 3;</code>
+     */
+    StagingLeader(3),
     UNRECOGNIZED(-1),
     ;
 
@@ -76,6 +84,14 @@ public final class HeartbeatOuterClass {
      * <code>DowngradingLeader = 2;</code>
      */
     public static final int DowngradingLeader_VALUE = 2;
+    /**
+     * <pre>
+     * A leader under staging mode.
+     * </pre>
+     *
+     * <code>StagingLeader = 3;</code>
+     */
+    public static final int StagingLeader_VALUE = 3;
 
 
     public final int getNumber() {
@@ -105,6 +121,7 @@ public final class HeartbeatOuterClass {
         case 0: return Leader;
         case 1: return Follower;
         case 2: return DowngradingLeader;
+        case 3: return StagingLeader;
         default: return null;
       }
     }
@@ -6151,7 +6168,7 @@ com.google.protobuf.ByteString defaultValue);
      *
      * <code>uint32 cpus = 4 [deprecated = true];</code>
      * @deprecated greptime.v1.meta.NodeInfo.cpus is deprecated.
-     *     See greptime/v1/meta/heartbeat.proto;l=96
+     *     See greptime/v1/meta/heartbeat.proto;l=98
      * @return The cpus.
      */
     @java.lang.Deprecated int getCpus();
@@ -6163,7 +6180,7 @@ com.google.protobuf.ByteString defaultValue);
      *
      * <code>uint64 memory_bytes = 5 [deprecated = true];</code>
      * @deprecated greptime.v1.meta.NodeInfo.memory_bytes is deprecated.
-     *     See greptime/v1/meta/heartbeat.proto;l=98
+     *     See greptime/v1/meta/heartbeat.proto;l=100
      * @return The memoryBytes.
      */
     @java.lang.Deprecated long getMemoryBytes();
@@ -6479,7 +6496,7 @@ com.google.protobuf.ByteString defaultValue);
      *
      * <code>uint32 cpus = 4 [deprecated = true];</code>
      * @deprecated greptime.v1.meta.NodeInfo.cpus is deprecated.
-     *     See greptime/v1/meta/heartbeat.proto;l=96
+     *     See greptime/v1/meta/heartbeat.proto;l=98
      * @return The cpus.
      */
     @java.lang.Override
@@ -6496,7 +6513,7 @@ com.google.protobuf.ByteString defaultValue);
      *
      * <code>uint64 memory_bytes = 5 [deprecated = true];</code>
      * @deprecated greptime.v1.meta.NodeInfo.memory_bytes is deprecated.
-     *     See greptime/v1/meta/heartbeat.proto;l=98
+     *     See greptime/v1/meta/heartbeat.proto;l=100
      * @return The memoryBytes.
      */
     @java.lang.Override
@@ -7314,7 +7331,7 @@ com.google.protobuf.ByteString defaultValue);
        *
        * <code>uint32 cpus = 4 [deprecated = true];</code>
        * @deprecated greptime.v1.meta.NodeInfo.cpus is deprecated.
-       *     See greptime/v1/meta/heartbeat.proto;l=96
+       *     See greptime/v1/meta/heartbeat.proto;l=98
        * @return The cpus.
        */
       @java.lang.Override
@@ -7328,7 +7345,7 @@ com.google.protobuf.ByteString defaultValue);
        *
        * <code>uint32 cpus = 4 [deprecated = true];</code>
        * @deprecated greptime.v1.meta.NodeInfo.cpus is deprecated.
-       *     See greptime/v1/meta/heartbeat.proto;l=96
+       *     See greptime/v1/meta/heartbeat.proto;l=98
        * @param value The cpus to set.
        * @return This builder for chaining.
        */
@@ -7345,7 +7362,7 @@ com.google.protobuf.ByteString defaultValue);
        *
        * <code>uint32 cpus = 4 [deprecated = true];</code>
        * @deprecated greptime.v1.meta.NodeInfo.cpus is deprecated.
-       *     See greptime/v1/meta/heartbeat.proto;l=96
+       *     See greptime/v1/meta/heartbeat.proto;l=98
        * @return This builder for chaining.
        */
       @java.lang.Deprecated public Builder clearCpus() {
@@ -7363,7 +7380,7 @@ com.google.protobuf.ByteString defaultValue);
        *
        * <code>uint64 memory_bytes = 5 [deprecated = true];</code>
        * @deprecated greptime.v1.meta.NodeInfo.memory_bytes is deprecated.
-       *     See greptime/v1/meta/heartbeat.proto;l=98
+       *     See greptime/v1/meta/heartbeat.proto;l=100
        * @return The memoryBytes.
        */
       @java.lang.Override
@@ -7377,7 +7394,7 @@ com.google.protobuf.ByteString defaultValue);
        *
        * <code>uint64 memory_bytes = 5 [deprecated = true];</code>
        * @deprecated greptime.v1.meta.NodeInfo.memory_bytes is deprecated.
-       *     See greptime/v1/meta/heartbeat.proto;l=98
+       *     See greptime/v1/meta/heartbeat.proto;l=100
        * @param value The memoryBytes to set.
        * @return This builder for chaining.
        */
@@ -7394,7 +7411,7 @@ com.google.protobuf.ByteString defaultValue);
        *
        * <code>uint64 memory_bytes = 5 [deprecated = true];</code>
        * @deprecated greptime.v1.meta.NodeInfo.memory_bytes is deprecated.
-       *     See greptime/v1/meta/heartbeat.proto;l=98
+       *     See greptime/v1/meta/heartbeat.proto;l=100
        * @return This builder for chaining.
        */
       @java.lang.Deprecated public Builder clearMemoryBytes() {
@@ -19174,15 +19191,16 @@ java.lang.String defaultValue);
       ".greptime.v1.meta.MailboxMessageHeader\022\n" +
       "\n\002id\030\001 \001(\004\022\017\n\007subject\030\002 \001(\t\022\014\n\004from\030\003 \001(" +
       "\t\022\n\n\002to\030\004 \001(\t\022\030\n\020timestamp_millis\030\005 \001(\003\022" +
-      "\016\n\004json\030\006 \001(\tH\000B\t\n\007payload*=\n\nRegionRole" +
+      "\016\n\004json\030\006 \001(\tH\000B\t\n\007payload*P\n\nRegionRole" +
       "\022\n\n\006Leader\020\000\022\014\n\010Follower\020\001\022\025\n\021Downgradin" +
-      "gLeader\020\0022\277\001\n\tHeartbeat\022Z\n\tHeartbeat\022\".g" +
-      "reptime.v1.meta.HeartbeatRequest\032#.grept" +
-      "ime.v1.meta.HeartbeatResponse\"\000(\0010\001\022V\n\tA" +
-      "skLeader\022\".greptime.v1.meta.AskLeaderReq" +
-      "uest\032#.greptime.v1.meta.AskLeaderRespons" +
-      "e\"\000B<Z:github.com/GreptimeTeam/greptime-" +
-      "proto/go/greptime/v1/metab\006proto3"
+      "gLeader\020\002\022\021\n\rStagingLeader\020\0032\277\001\n\tHeartbe" +
+      "at\022Z\n\tHeartbeat\022\".greptime.v1.meta.Heart" +
+      "beatRequest\032#.greptime.v1.meta.Heartbeat" +
+      "Response\"\000(\0010\001\022V\n\tAskLeader\022\".greptime.v" +
+      "1.meta.AskLeaderRequest\032#.greptime.v1.me" +
+      "ta.AskLeaderResponse\"\000B<Z:github.com/Gre" +
+      "ptimeTeam/greptime-proto/go/greptime/v1/" +
+      "metab\006proto3"
     };
     descriptor = com.google.protobuf.Descriptors.FileDescriptor
       .internalBuildGeneratedFileFrom(descriptorData,
diff --git a/proto/greptime/v1/meta/heartbeat.proto b/proto/greptime/v1/meta/heartbeat.proto
index efa8441..d3546d5 100644
--- a/proto/greptime/v1/meta/heartbeat.proto
+++ b/proto/greptime/v1/meta/heartbeat.proto
@@ -84,6 +84,8 @@ enum RegionRole {
   // This role is used to prevent the region from being written during the
   // downgrade process.
   DowngradingLeader = 2;
+  // A leader under staging mode.
+  StagingLeader = 3;
 }
 
 message NodeInfo {
diff --git a/src/generated/greptime.v1.meta.rs b/src/generated/greptime.v1.meta.rs
index 004aaad..6899c9c 100644
--- a/src/generated/greptime.v1.meta.rs
+++ b/src/generated/greptime.v1.meta.rs
@@ -375,6 +375,8 @@ pub enum RegionRole {
     /// This role is used to prevent the region from being written during the
     /// downgrade process.
     DowngradingLeader = 2,
+    /// A leader under staging mode.
+    StagingLeader = 3,
 }
 impl RegionRole {
     /// String value of the enum field names used in the ProtoBuf definition.
@@ -386,6 +388,7 @@ impl RegionRole {
             Self::Leader => "Leader",
             Self::Follower => "Follower",
             Self::DowngradingLeader => "DowngradingLeader",
+            Self::StagingLeader => "StagingLeader",
         }
     }
     /// Creates an enum from field names used in the ProtoBuf definition.
@@ -394,6 +397,7 @@ impl RegionRole {
             "Leader" => Some(Self::Leader),
             "Follower" => Some(Self::Follower),
             "DowngradingLeader" => Some(Self::DowngradingLeader),
+            "StagingLeader" => Some(Self::StagingLeader),
             _ => None,
         }
     }
diff --git a/src/generated/greptime_grpc_desc.bin b/src/generated/greptime_grpc_desc.bin
index d7c79156006387b631e36baa4e12b5e692006180..ed6aa0b67d5ba32aa73547f3715e1c867f2274a1 100644
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