From 11e8c231d30defe74c8431d8050dd8c639eca3c0 Mon Sep 17 00:00:00 2001
From: Kunal Kotwani <kkotwani@amazon.com>
Date: Thu, 13 Oct 2022 15:03:16 -0700
Subject: [PATCH] Deprecate Balancer to maintain BWC

Signed-off-by: Kunal Kotwani <kkotwani@amazon.com>
---
 .../allocator/BalancedShardsAllocator.java    | 19 +++++++++++++++++++
 1 file changed, 19 insertions(+)

diff --git a/server/src/main/java/org/opensearch/cluster/routing/allocation/allocator/BalancedShardsAllocator.java b/server/src/main/java/org/opensearch/cluster/routing/allocation/allocator/BalancedShardsAllocator.java
index f6ed4d3763ed9..42c8f7987bf3d 100644
--- a/server/src/main/java/org/opensearch/cluster/routing/allocation/allocator/BalancedShardsAllocator.java
+++ b/server/src/main/java/org/opensearch/cluster/routing/allocation/allocator/BalancedShardsAllocator.java
@@ -353,6 +353,25 @@ public boolean containsShard(ShardRouting shard) {
 
     }
 
+    /**
+     *  A {@link Balancer} used by the {@link BalancedShardsAllocator} to perform allocation operations
+     * @deprecated As of 2.4.0, replaced by {@link LocalShardsBalancer}
+     *
+     * @opensearch.internal
+     */
+    @Deprecated
+    public static class Balancer extends LocalShardsBalancer {
+        public Balancer(
+            Logger logger,
+            RoutingAllocation allocation,
+            boolean movePrimaryFirst,
+            BalancedShardsAllocator.WeightFunction weight,
+            float threshold
+        ) {
+            super(logger, allocation, movePrimaryFirst, weight, threshold);
+        }
+    }
+
     /**
      * A model index.
      *