Imported Upstream version 4.0.0~alpha1

Former-commit-id: 806294f5ded97629b74c85c09952f2a74fe182d9

external/referencesource/System.ServiceModel/System/ServiceModel/Channels/ConnectionPoolRegistry.cs

@@ -0,0 +1,90 @@
+//----------------------------------------------------------------------------
+// Copyright (c) Microsoft Corporation.  All rights reserved.
+//----------------------------------------------------------------------------
+namespace System.ServiceModel.Channels
+{
+    using System.Diagnostics;
+    using System.ServiceModel;
+    using System.Collections.Generic;
+    using System.ServiceModel.Diagnostics;
+
+    abstract class ConnectionPoolRegistry
+    {
+        Dictionary<string, List<ConnectionPool>> registry;
+
+        protected ConnectionPoolRegistry()
+        {
+            registry = new Dictionary<string, List<ConnectionPool>>();
+        }
+
+        object ThisLock
+        {
+            get { return this.registry; }
+        }
+
+        // NOTE: performs the open on the pool for you
+        public ConnectionPool Lookup(IConnectionOrientedTransportChannelFactorySettings settings)
+        {
+            ConnectionPool result = null;
+            string key = settings.ConnectionPoolGroupName;
+
+            lock (ThisLock)
+            {
+                List<ConnectionPool> registryEntry = null;
+
+                if (registry.TryGetValue(key, out registryEntry))
+                {
+                    for (int i = 0; i < registryEntry.Count; i++)
+                    {
+                        if (registryEntry[i].IsCompatible(settings) && registryEntry[i].TryOpen())
+                        {
+                            result = registryEntry[i];
+                            break;
+                        }
+                    }
+                }
+                else
+                {
+                    registryEntry = new List<ConnectionPool>();
+                    registry.Add(key, registryEntry);
+                }
+
+                if (result == null)
+                {
+                    result = CreatePool(settings);
+                    registryEntry.Add(result);
+                }
+            }
+
+            return result;
+        }
+
+        protected abstract ConnectionPool CreatePool(IConnectionOrientedTransportChannelFactorySettings settings);
+
+        public void Release(ConnectionPool pool, TimeSpan timeout)
+        {
+            lock (ThisLock)
+            {
+                if (pool.Close(timeout))
+                {
+                    List<ConnectionPool> registryEntry = registry[pool.Name];
+                    for (int i = 0; i < registryEntry.Count; i++)
+                    {
+                        if (object.ReferenceEquals(registryEntry[i], pool))
+                        {
+                            registryEntry.RemoveAt(i);
+                            break;
+                        }
+                    }
+
+                    if (registryEntry.Count == 0)
+                    {
+                        registry.Remove(pool.Name);
+                    }
+                }
+            }
+        }
+    }
+}
+
+