Imported Upstream version 4.6.0.125

Former-commit-id: a2155e9bd80020e49e72e86c44da02a8ac0e57a4

mcs/class/referencesource/System.ServiceModel/System/ServiceModel/PeerNode.cs

@@ -0,0 +1,121 @@
+//------------------------------------------------------------
+// Copyright (c) Microsoft Corporation.  All rights reserved.
+//------------------------------------------------------------
+
+namespace System.ServiceModel
+{
+    using System;
+    using System.Runtime;
+    using System.ServiceModel.Channels;
+    using System.ServiceModel.Dispatcher;
+    using System.Threading;
+
+    public sealed class PeerNode : IOnlineStatus
+    {
+        PeerNodeImplementation innerNode = null;
+        SynchronizationContext synchronizationContext = null;
+        MessageEncodingBindingElement encoderElement;
+
+        internal PeerNode(PeerNodeImplementation peerNode)
+        {
+            this.innerNode = peerNode;
+        }
+
+        public event EventHandler Offline;
+        public event EventHandler Online;
+
+        internal void FireOffline(object source, EventArgs args)
+        {
+            FireEvent(Offline, source, args);
+        }
+
+        internal void FireOnline(object source, EventArgs args)
+        {
+            FireEvent(Online, source, args);
+        }
+
+        void FireEvent(EventHandler handler, object source, EventArgs args)
+        {
+            if (handler != null)
+            {
+                try
+                {
+                    SynchronizationContext context = synchronizationContext;
+                    if (context != null)
+                    {
+                        context.Send(delegate(object state) { handler(source, args); }, null);
+                    }
+                    else
+                    {
+                        handler(source, args);
+                    }
+                }
+                catch (Exception e)
+                {
+                    if (Fx.IsFatal(e)) throw;
+                    throw DiagnosticUtility.ExceptionUtility.ThrowHelperCallback(SR.GetString(SR.NotificationException), e);
+                }
+            }
+        }
+
+        public bool IsOnline { get { return InnerNode.IsOnline; } }
+
+        internal bool IsOpen { get { return InnerNode.IsOpen; } }
+
+        public int Port { get { return InnerNode.ListenerPort; } }
+
+        public PeerMessagePropagationFilter MessagePropagationFilter
+        {
+            get { return InnerNode.MessagePropagationFilter; }
+            set { InnerNode.MessagePropagationFilter = value; }
+        }
+
+        internal void OnOpen()
+        {
+            synchronizationContext = ThreadBehavior.GetCurrentSynchronizationContext();
+            this.innerNode.Offline += FireOffline;
+            this.innerNode.Online += FireOnline;
+            this.innerNode.EncodingElement = this.encoderElement;
+        }
+
+        internal void OnClose()
+        {
+            this.innerNode.Offline -= FireOffline;
+            this.innerNode.Online -= FireOnline;
+            synchronizationContext = null;
+        }
+
+        internal PeerNodeImplementation InnerNode
+        {
+            get { return innerNode; }
+        }
+
+        public void RefreshConnection()
+        {
+            PeerNodeImplementation node = InnerNode;
+            if (node != null)
+            {
+                node.RefreshConnection();
+            }
+        }
+
+        public override string ToString()
+        {
+            if (this.IsOpen)
+            {
+                return SR.GetString(SR.PeerNodeToStringFormat, this.InnerNode.MeshId, this.InnerNode.NodeId, this.IsOnline, this.IsOpen, this.Port);
+            }
+            else
+            {
+                return SR.GetString(SR.PeerNodeToStringFormat, "", -1, this.IsOnline, this.IsOpen, -1);
+            }
+        }
+
+        private MessageEncodingBindingElement EncodingElement
+        {
+            get { return this.encoderElement; }
+            set { this.encoderElement = value; }
+
+        }
+    }
+}