PerSessionInstanceContextProvider.cs source code in C# .NET

Source code for the .NET framework in C#

                        
Code:

                         / WCF / WCF / 3.5.30729.1 / untmp / Orcas / SP / ndp / cdf / src / WCF / ServiceModel / System / ServiceModel / Dispatcher / PerSessionInstanceContextProvider.cs / 1 / PerSessionInstanceContextProvider.cs
                        

                        
                            //------------------------------------------------------------------------------ 
// Copyright (c) Microsoft Corporation.  All rights reserved.
//-----------------------------------------------------------------------------

namespace System.ServiceModel.Dispatcher 
{
    using System; 
    using System.ServiceModel; 
    using System.ServiceModel.Channels;
 
    internal class PerSessionInstanceContextProvider : InstanceContextProviderBase
    {

        internal PerSessionInstanceContextProvider(DispatchRuntime dispatchRuntime) 
            : base(dispatchRuntime)
        { 
        } 

 
        #region IInstanceContextProvider Members

        public override InstanceContext GetExistingInstanceContext(Message message, IContextChannel channel)
        { 
            // Here is the flow for a Sessionful channel
            //  1. First request comes in on new channel. 
            //  2. ServiceChannel.InstanceContext is returned which is null. 
            //  3. InstanceBehavior.EnsureInstanceContext will create a new InstanceContext.
            //  4. this.InitializeInstanceContext is called with the newly created InstanceContext and the channel. 
            //  5. If the channel is sessionful then its bound to the InstanceContext.
            //  6. Bind channel to the InstanceContext.
            //  7. For all further requests on the same channel, we will return ServiceChannel.InstanceContext which will be non null.
            ServiceChannel serviceChannel = this.GetServiceChannelFromProxy(channel); 
            DiagnosticUtility.DebugAssert((serviceChannel != null), "System.ServiceModel.Dispatcher.PerSessionInstanceContextProvider.GetExistingInstanceContext(), serviceChannel != null");
            return (serviceChannel != null) ? serviceChannel.InstanceContext : null; 
        } 

        public override void InitializeInstanceContext(InstanceContext instanceContext, Message message, IContextChannel channel) 
        {
            ServiceChannel serviceChannel = GetServiceChannelFromProxy(channel);
            if (serviceChannel != null && serviceChannel.HasSession)
            { 
                instanceContext.BindIncomingChannel(serviceChannel);
            } 
        } 

 
        public override bool IsIdle(InstanceContext instanceContext)
        {
            //By default return true
            return true; 
        }
 
        public override void NotifyIdle(InstanceContextIdleCallback callback, InstanceContext instanceContext) 
        {
            //no-op 
        }

        #endregion
    } 
}

// File provided for Reference Use Only by Microsoft Corporation (c) 2007.
// Copyright (c) Microsoft Corporation. All rights reserved.

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