1 files changed, 49 insertions, 0 deletions
diff --git a/lib/VNLib.Plugins.Extensions.VNCache/src/Clustering/IClusterNodeIndex.cs b/lib/VNLib.Plugins.Extensions.VNCache/src/Clustering/IClusterNodeIndex.cs
new file mode 100644
index 0000000..ffbfa0d
--- /dev/null
+++ b/lib/VNLib.Plugins.Extensions.VNCache/src/Clustering/IClusterNodeIndex.cs
@@ -0,0 +1,49 @@
+/*
+* Copyright (c) 2023 Vaughn Nugent
+* 
+* Library: VNLib
+* Package: VNLib.Plugins.Extensions.VNCache
+* File: IClusterNodeIndex.cs 
+*
+* IClusterNodeIndex.cs is part of VNLib.Plugins.Extensions.VNCache which is part of the larger 
+* VNLib collection of libraries and utilities.
+*
+* VNLib.Plugins.Extensions.VNCache is free software: you can redistribute it and/or modify 
+* it under the terms of the GNU Affero General Public License as 
+* published by the Free Software Foundation, either version 3 of the
+* License, or (at your option) any later version.
+*
+* VNLib.Plugins.Extensions.VNCache is distributed in the hope that it will be useful,
+* but WITHOUT ANY WARRANTY; without even the implied warranty of
+* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+* GNU Affero General Public License for more details.
+*
+* You should have received a copy of the GNU Affero General Public License
+* along with this program.  If not, see https://www.gnu.org/licenses/.
+*/
+
+using System.Threading;
+using System.Threading.Tasks;
+
+using VNLib.Data.Caching.Extensions.Clustering;
+
+namespace VNLib.Plugins.Extensions.VNCache.Clustering
+{
+    internal interface IClusterNodeIndex
+    {
+        /// <summary>
+        /// Gets the next available node using the configured balancing policy
+        /// or null if no nodes are available
+        /// </summary>
+        /// <returns>The next available node to connect to if any are available</returns>
+        CacheNodeAdvertisment? GetNextNode();
+
+        /// <summary>
+        /// Waits for the discovery process to complete. This is just incase a 
+        /// connection wants to happen while a long discovery is processing.
+        /// </summary>
+        /// <param name="cancellationToken">A token to cancel the operation</param>
+        /// <returns>A task that resolves when the discovery process completes</returns>
+        Task WaitForDiscoveryAsync(CancellationToken cancellationToken);
+    }
+}
+\ No newline at end of file