1 files changed, 39 insertions, 0 deletions
diff --git a/other/java/client/src/main/proto/filer.proto b/other/java/client/src/main/proto/filer.proto
index 821b6c281..3dda002c5 100644
--- a/other/java/client/src/main/proto/filer.proto
+++ b/other/java/client/src/main/proto/filer.proto
@@ -68,6 +68,13 @@ service SeaweedFiler {
 
     rpc CacheRemoteObjectToLocalCluster (CacheRemoteObjectToLocalClusterRequest) returns (CacheRemoteObjectToLocalClusterResponse) {
     }
+
+    rpc Lock(LockRequest) returns (LockResponse) {
+    }
+    rpc Unlock(UnlockRequest) returns (UnlockResponse) {
+    }
+    rpc TransferLocks(TransferLocksRequest) returns (TransferLocksResponse) {
+    }
 }
 
 //////////////////////////////////////////////////
@@ -428,3 +435,35 @@ message CacheRemoteObjectToLocalClusterRequest {
 message CacheRemoteObjectToLocalClusterResponse {
     Entry entry = 1;
 }
+
+/////////////////////////
+// distributed lock management
+/////////////////////////
+message LockRequest {
+    string name = 1;
+    int64 seconds_to_lock = 2;
+    string previous_lock_token = 3;
+}
+message LockResponse {
+    string renew_token = 1;
+    string error = 3;
+    string moved_to = 4;
+}
+message UnlockRequest {
+    string name = 1;
+    string lock_token = 2;
+}
+message UnlockResponse {
+    string error = 1;
+    string moved_to = 2;
+}
+message Lock {
+    string name = 1;
+    string renew_token = 2;
+    int64 expiration_ns = 3;
+}
+message TransferLocksRequest {
+    repeated Lock locks = 1;
+}
+message TransferLocksResponse {
+}