1 files changed, 71 insertions, 0 deletions
diff --git a/lib/Net.Rest.Client/src/RestClientPool.cs b/lib/Net.Rest.Client/src/RestClientPool.cs
new file mode 100644
index 0000000..2d61203
--- /dev/null
+++ b/lib/Net.Rest.Client/src/RestClientPool.cs
@@ -0,0 +1,71 @@
+/*
+* Copyright (c) 2023 Vaughn Nugent
+* 
+* Library: VNLib
+* Package: VNLib.Net.Rest.Client
+* File: RestClientPool.cs 
+*
+* RestClientPool.cs is part of VNLib.Net.Rest.Client which is part of the larger 
+* VNLib collection of libraries and utilities.
+*
+* VNLib.Net.Rest.Client is free software: you can redistribute it and/or modify 
+* it under the terms of the GNU General Public License as published
+* by the Free Software Foundation, either version 2 of the License,
+* or (at your option) any later version.
+*
+* VNLib.Net.Rest.Client 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 
+* General Public License for more details.
+*
+* You should have received a copy of the GNU General Public License 
+* along with VNLib.Net.Rest.Client. If not, see http://www.gnu.org/licenses/.
+*/
+
+using System;
+
+using RestSharp;
+using RestSharp.Authenticators;
+
+using VNLib.Utils.Memory.Caching;
+
+#nullable enable
+
+namespace VNLib.Net.Rest.Client
+{
+    /// <summary>
+    /// Maintains a pool of lazy loaded <see cref="RestClient"/> instances to allow for concurrent client usage
+    /// </summary>
+    public class RestClientPool : ObjectRental<RestClient>
+    {
+        /// <summary>
+        /// Creates a new <see cref="RestClientPool"/> instance and creates the specified
+        /// number of clients with the same number of concurrency.
+        /// </summary>
+        /// <param name="maxClients">The maximum number of clients to create and authenticate, should be the same as the number of maximum allowed tokens</param>
+        /// <param name="options">A <see cref="RestClientOptions"/> used to initialze the pool of clients</param>
+        /// <param name="authenticator">An optional authenticator for clients to use</param>
+        /// <param name="initCb">An optional client initialzation callback</param>
+        public RestClientPool(int maxClients, RestClientOptions options, Action<RestClient>? initCb = null, IAuthenticator? authenticator = null)
+            : base(() =>
+            {
+                //Add optional authenticator
+                options.Authenticator = authenticator;
+
+                //load client
+                RestClient client = new(options);
+
+                //Invoke init callback
+                initCb?.Invoke(client);
+                return client;
+            }, null, null, maxClients)
+        {
+        }
+
+        /// <summary>
+        /// Obtains a new <see cref="ClientContract"/> for a reused, or new, <see cref="RestClient"/> instance
+        /// </summary>
+        /// <returns>The contract that manages the client</returns>
+        public ClientContract Lease() => new(base.Rent(), this);
+    }
+}