Add product check status to connection pool

Author: stevejgordon

src/Elasticsearch.Net/ConnectionPool/IConnectionPool.cs

@@ -10,21 +10,21 @@ namespace Elasticsearch.Net
 	public interface IConnectionPool : IDisposable
 	{
 		/// <summary>
-		/// The last time that this instance was updated
+		/// The last time that this instance was updated.
 		/// </summary>
 		DateTime LastUpdate { get; }
 
 		/// <summary>
 		/// Returns the default maximum retries for the connection pool implementation.
-		/// Most implementation default to number of nodes, note that this can be overidden
-		/// in the connection settings
+		/// Most implementation default to number of nodes, note that this can be overridden
+		/// in the connection settings.
 		/// </summary>
 		int MaxRetries { get; }
 
 		/// <summary>
 		/// Returns a read only view of all the nodes in the cluster, which might involve creating copies of nodes e.g
 		/// if you are using <see cref="SniffingConnectionPool" />.
-		/// If you do not need an isolated copy of the nodes, please read <see cref="CreateView" /> to completion
+		/// If you do not need an isolated copy of the nodes, please read <see cref="CreateView" /> to completion.
 		/// </summary>
 		IReadOnlyCollection<Node> Nodes { get; }
 
@@ -34,6 +34,12 @@ public interface IConnectionPool : IDisposable
 		/// </summary>
 		bool SniffedOnStartup { get; set; }
 
+		/// <summary>
+		/// Whether a product check is seen on startup. The implementation is
+		/// responsible for setting this in a thread safe fashion.
+		/// </summary>
+		ProductCheckStatus ProductCheckStatus { get; set; }
+
 		/// <summary>
 		/// Whether pinging is supported
 		/// </summary>

src/Elasticsearch.Net/ConnectionPool/SingleNodeConnectionPool.cs

@@ -34,6 +34,9 @@ public bool SniffedOnStartup
 			set { }
 		}
 
+		/// <inheritdoc />
+		public ProductCheckStatus ProductCheckStatus { get; set; }
+
 		/// <inheritdoc />
 		public bool SupportsPinging => false;
 

src/Elasticsearch.Net/ConnectionPool/StaticConnectionPool.cs

@@ -75,6 +75,9 @@ private void Initialize(IEnumerable<Node> nodes, IDateTimeProvider dateTimeProvi
 		/// <inheritdoc />
 		public bool SniffedOnStartup { get; set; }
 
+		/// <inheritdoc />
+		public ProductCheckStatus ProductCheckStatus { get; set; }
+
 		/// <inheritdoc />
 		public virtual bool SupportsPinging => true;