From 499dfec55105fc69c4f1cfa453392bcd4c7da504 Mon Sep 17 00:00:00 2001
From: Steve Gordon <sgordon@hotmail.co.uk>
Date: Fri, 9 Jul 2021 19:16:54 +0100
Subject: [PATCH] Support index pattern exclusion in CCR AutoFollow (#5832)

* Add leader index exclusion patterns

* Update create auto follow pattern request

* Update auto follow pattern response
---
 .../CreateAutoFollowPatternRequest.cs                 | 11 +++++++++++
 .../GetAutoFollowPatternResponse.cs                   |  9 +++++++++
 2 files changed, 20 insertions(+)

diff --git a/src/Nest/XPack/CrossClusterReplication/AutoFollow/CreateAutoFollowPattern/CreateAutoFollowPatternRequest.cs b/src/Nest/XPack/CrossClusterReplication/AutoFollow/CreateAutoFollowPattern/CreateAutoFollowPatternRequest.cs
index a2f1ccf6eba..3c6c4a085c1 100644
--- a/src/Nest/XPack/CrossClusterReplication/AutoFollow/CreateAutoFollowPattern/CreateAutoFollowPatternRequest.cs
+++ b/src/Nest/XPack/CrossClusterReplication/AutoFollow/CreateAutoFollowPattern/CreateAutoFollowPatternRequest.cs
@@ -23,6 +23,8 @@ public partial class CreateAutoFollowPatternRequest
 		public string RemoteCluster { get; set; }
 		/// <inheritdoc cref="IAutoFollowPattern.LeaderIndexPatterns"/>
 		public IEnumerable<string> LeaderIndexPatterns { get; set; }
+		/// <inheritdoc cref="IAutoFollowPattern.LeaderIndexExclusionPatterns"/>
+		public IEnumerable<string> LeaderIndexExclusionPatterns { get; set; }
 		/// <inheritdoc cref="IAutoFollowPattern.Settings"/>
 		public IIndexSettings Settings { get; set; }
 		/// <inheritdoc cref="IAutoFollowPattern.FollowIndexPattern"/>
@@ -54,6 +56,7 @@ public partial class CreateAutoFollowPatternDescriptor
 	{
 		string IAutoFollowPattern.RemoteCluster { get; set; }
 		IEnumerable<string> IAutoFollowPattern.LeaderIndexPatterns { get; set; }
+		IEnumerable<string> IAutoFollowPattern.LeaderIndexExclusionPatterns { get; set; }
 		string IAutoFollowPattern.FollowIndexPattern { get; set; }
 		IIndexSettings IAutoFollowPattern.Settings { get; set; }
 		int? IAutoFollowPattern.MaxReadRequestOperationCount { get; set; }
@@ -78,6 +81,14 @@ public CreateAutoFollowPatternDescriptor LeaderIndexPatterns(IEnumerable<string>
 		public CreateAutoFollowPatternDescriptor LeaderIndexPatterns(params string[] leaderIndexPatterns) =>
 			Assign(leaderIndexPatterns, (a, v) => a.LeaderIndexPatterns = v);
 
+		/// <inheritdoc cref="IAutoFollowPattern.LeaderIndexExclusionPatterns"/>
+		public CreateAutoFollowPatternDescriptor LeaderIndexExclusionPatterns(IEnumerable<string> leaderIndexExclusionPatterns) =>
+			Assign(leaderIndexExclusionPatterns, (a, v) => a.LeaderIndexExclusionPatterns = v);
+
+		/// <inheritdoc cref="IAutoFollowPattern.LeaderIndexExclusionPatterns"/>
+		public CreateAutoFollowPatternDescriptor LeaderIndexExclusionPatterns(params string[] leaderIndexExclusionPatterns) =>
+			Assign(leaderIndexExclusionPatterns, (a, v) => a.LeaderIndexExclusionPatterns = v);
+
 		/// <inheritdoc cref="IAutoFollowPattern.FollowIndexPattern"/>
 		public CreateAutoFollowPatternDescriptor FollowIndexPattern(string followIndexPattern) =>
 			Assign(followIndexPattern, (a, v) => a.FollowIndexPattern = v);
diff --git a/src/Nest/XPack/CrossClusterReplication/AutoFollow/GetAutoFollowPattern/GetAutoFollowPatternResponse.cs b/src/Nest/XPack/CrossClusterReplication/AutoFollow/GetAutoFollowPattern/GetAutoFollowPatternResponse.cs
index 13dc5e5297e..c3f9740d72f 100644
--- a/src/Nest/XPack/CrossClusterReplication/AutoFollow/GetAutoFollowPattern/GetAutoFollowPatternResponse.cs
+++ b/src/Nest/XPack/CrossClusterReplication/AutoFollow/GetAutoFollowPattern/GetAutoFollowPatternResponse.cs
@@ -109,6 +109,13 @@ public interface IAutoFollowPattern
 		[DataMember(Name = "leader_index_patterns")]
 		IEnumerable<string> LeaderIndexPatterns { get; set; }
 
+		/// <summary>
+		/// An array of simple index patterns that can be used to exclude indices from being auto-followed. Indices in the remote cluster whose names are matching one or
+		/// more `leader_index_patterns` and one or more `leader_index_exclusion_patterns` won't be followed.
+		/// </summary>
+		[DataMember(Name = "leader_index_exclusion_patterns")]
+		IEnumerable<string> LeaderIndexExclusionPatterns { get; set; }
+
 		/// <summary>
 		/// Settings to override from the leader index.
 		/// Note that certain settings can not be overrode e.g. index.number_of_shards.
@@ -197,6 +204,8 @@ public class AutoFollowPattern : IAutoFollowPattern
 
 		/// <inheritdoc cref="IAutoFollowPattern.LeaderIndexPatterns" />
 		public IEnumerable<string> LeaderIndexPatterns { get; set; }
+		/// <inheritdoc cref="IAutoFollowPattern.LeaderIndexExclusionPatterns" />
+		public IEnumerable<string> LeaderIndexExclusionPatterns { get; set; }
 
 		/// <inheritdoc cref="IAutoFollowPattern.Settings" />
 		public IIndexSettings Settings { get; set; }