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

namespace System.ServiceModel.Dispatcher
{
    using System;
    using System.ServiceModel;
    using System.ServiceModel.Channels;

    internal class PerCallInstanceContextProvider : InstanceContextProviderBase
    {
        internal PerCallInstanceContextProvider(DispatchRuntime dispatchRuntime)
            : base(dispatchRuntime)
        {
        }

        #region IInstanceContextProvider Members

        public override InstanceContext GetExistingInstanceContext(Message message, IContextChannel channel)
        {
            //Always return null so we will create new InstanceContext for each message
            return null;
        }

        public override void InitializeInstanceContext(InstanceContext instanceContext, Message message, IContextChannel channel)
        {
            //no-op
        }

        public override bool IsIdle(InstanceContext instanceContext)
        {
            //By default return true if no channels are bound to this context
            return true;
        }

        public override void NotifyIdle(InstanceContextIdleCallback callback, InstanceContext instanceContext)
        {
            //no-op
        }

        #endregion
    }
}