Support indexing pressure on NodeStats (#5148)

* Support indexing pressure on NodeStats

Indexing pressure stats were added in 7.9.0 elastic/elasticsearch#59467
They were updated to include memory limit stats in 7.10.0 elastic/elasticsearch#60342

Author: stevejgordon

src/Nest/Cluster/NodesStats/NodeStats.cs

@@ -79,6 +79,9 @@ public class NodeStats
 
 		[DataMember(Name = "transport_address")]
 		public string TransportAddress { get; internal set; }
+
+		[DataMember(Name = "indexing_pressure")]
+		public IndexingPressureStats IndexingPressure { get; internal set; }
 	}
 
 	[DataContract]
@@ -570,4 +573,74 @@ public class HttpStats
 		[DataMember(Name = "total_opened")]
 		public long TotalOpened { get; internal set; }
 	}
+
+	[DataContract]
+	public class IndexingPressureStats
+	{
+		[DataMember(Name = "memory")]
+		public IndexingPressureMemoryStats Memory { get; internal set; }
+	}
+
+	[DataContract]
+	public class IndexingPressureMemoryStats
+	{
+		[DataMember(Name = "current")]
+		public IndexingLoad Current { get; internal set; }
+
+		[DataMember(Name = "total")]
+		public TotalIndexingLoad Total { get; internal set; }
+
+		[DataMember(Name = "limit_in_bytes")]
+		public long LimitInBytes { get; internal set; }
+
+		[DataMember(Name = "limit")]
+		public string Limit { get; internal set; }
+	}
+
+	[DataContract]
+	public class IndexingLoad
+	{
+		[DataMember(Name = "combined_coordinating_and_primary_in_bytes")]
+		public long CombinedCoordinatingAndPrimaryInBytes { get; internal set; }
+
+		[DataMember(Name = "combined_coordinating_and_primary")]
+		public string CombinedCoordinatingAndPrimary { get; internal set; }
+
+		[DataMember(Name = "coordinating_in_bytes")]
+		public long CoordinatingInBytes { get; internal set; }
+
+		[DataMember(Name = "coordinating")]
+		public string Coordinating { get; internal set; }
+
+		[DataMember(Name = "primary_in_bytes")]
+		public long PrimaryInBytes { get; internal set; }
+
+		[DataMember(Name = "primary")]
+		public string Primary { get; internal set; }
+
+		[DataMember(Name = "replica_in_bytes")]
+		public long ReplicaInBytes { get; internal set; }
+
+		[DataMember(Name = "replica")]
+		public string Replica { get; internal set; }
+
+		[DataMember(Name = "all_in_bytes")]
+		public long AllInBytes { get; internal set; }
+
+		[DataMember(Name = "all")]
+		public string All { get; internal set; }
+	}
+
+	[DataContract]
+	public class TotalIndexingLoad : IndexingLoad
+	{
+		[DataMember(Name = "coordinating_rejections")]
+		public int CoordinatingRejections { get; internal set; }
+
+		[DataMember(Name = "primary_rejections")]
+		public int PrimaryRejections { get; internal set; }
+
+		[DataMember(Name = "replica_rejections")]
+		public int ReplicaRejections { get; internal set; }
+	}
 }

tests/Tests/Cluster/NodesStats/NodesStatsApiTests.cs

@@ -76,6 +76,9 @@ protected override void ExpectResponse(NodesStatsResponse response)
 
 			if (TestClient.Configuration.InRange(">=7.8.0"))
 				Assert(node.ScriptCache);
+
+			if (TestClient.Configuration.InRange(">=7.9.0"))
+				Assert(node.IndexingPressure);
 		}
 
 		protected void Assert(NodeIngestStats nodeIngestStats)
@@ -276,5 +279,39 @@ protected void Assert(NodeJvmStats jvm)
 			//jvm.Threads.Count.Should().BeGreaterThan(0);
 			//jvm.Threads.PeakCount.Should().BeGreaterThan(0);
 		}
+
+		protected void Assert(IndexingPressureStats indexingPressureStats)
+		{
+			if (TestClient.Configuration.InRange(">=7.10.0"))
+			{
+				indexingPressureStats.Memory.LimitInBytes.Should().BeGreaterOrEqualTo(0);
+				//indexingPressureStats.Memory.Limit.Should().NotBeNull();
+			}
+
+			indexingPressureStats.Memory.Current.CombinedCoordinatingAndPrimaryInBytes.Should().BeGreaterOrEqualTo(0);
+			//indexingPressureStats.Memory.Current.CombinedCoordinatingAndPrimary.Should().NotBeNull();
+			indexingPressureStats.Memory.Current.CoordinatingInBytes.Should().BeGreaterOrEqualTo(0);
+			//indexingPressureStats.Memory.Current.Coordinating.Should().NotBeNull();
+			indexingPressureStats.Memory.Current.PrimaryInBytes.Should().BeGreaterOrEqualTo(0);
+			//indexingPressureStats.Memory.Current.Primary.Should().NotBeNull();
+			indexingPressureStats.Memory.Current.ReplicaInBytes.Should().BeGreaterOrEqualTo(0);
+			//indexingPressureStats.Memory.Current.Replica.Should().NotBeNull();
+			indexingPressureStats.Memory.Current.AllInBytes.Should().BeGreaterOrEqualTo(0);
+			//indexingPressureStats.Memory.Current.All.Should().NotBeNull();
+
+			indexingPressureStats.Memory.Total.CombinedCoordinatingAndPrimaryInBytes.Should().BeGreaterOrEqualTo(0);
+			//indexingPressureStats.Memory.Total.CombinedCoordinatingAndPrimary.Should().NotBeNull();
+			indexingPressureStats.Memory.Total.CoordinatingInBytes.Should().BeGreaterOrEqualTo(0);
+			//indexingPressureStats.Memory.Total.Coordinating.Should().NotBeNull();
+			indexingPressureStats.Memory.Total.PrimaryInBytes.Should().BeGreaterOrEqualTo(0);
+			//indexingPressureStats.Memory.Total.Primary.Should().NotBeNull();
+			indexingPressureStats.Memory.Total.ReplicaInBytes.Should().BeGreaterOrEqualTo(0);
+			//indexingPressureStats.Memory.Total.Replica.Should().NotBeNull();
+			indexingPressureStats.Memory.Total.AllInBytes.Should().BeGreaterOrEqualTo(0);
+			//indexingPressureStats.Memory.Total.All.Should().NotBeNull();
+			indexingPressureStats.Memory.Total.CoordinatingRejections.Should().BeGreaterOrEqualTo(0);
+			indexingPressureStats.Memory.Total.PrimaryRejections.Should().BeGreaterOrEqualTo(0);
+			indexingPressureStats.Memory.Total.ReplicaRejections.Should().BeGreaterOrEqualTo(0);
+		}
 	}
 }