/source/library/Interlace/ReactorService/InvokeReactorQueue.cs

#region Using Directives and Copyright Notice



// Copyright (c) 2007-2010, Computer Consultancy Pty Ltd

// All rights reserved.

// 

// Redistribution and use in source and binary forms, with or without

// modification, are permitted provided that the following conditions are met:

//     * Redistributions of source code must retain the above copyright

//       notice, this list of conditions and the following disclaimer.

//     * Redistributions in binary form must reproduce the above copyright

//       notice, this list of conditions and the following disclaimer in the

//       documentation and/or other materials provided with the distribution.

//     * Neither the name of the Computer Consultancy Pty Ltd nor the

//       names of its contributors may be used to endorse or promote products

//       derived from this software without specific prior written permission.

// 

// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" 

// AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 

// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 

// ARE DISCLAIMED. IN NO EVENT SHALL COMPUTER CONSULTANCY PTY LTD BE LIABLE 

// FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 

// DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR 

// SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER 

// CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 

// LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 

// OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH

// DAMAGE.



using System;

using System.Collections.Generic;

using System.Reflection;

using System.Text;



using Interlace.ReactorCore;

using Interlace.ReactorUtilities;

using Interlace.Utilities;



#endregion



namespace Interlace.ReactorService

{

    public class InvokeReactorQueue 

    {

        ReactorQueue<InvokeReactorQueueRequest> _queue;



        public InvokeReactorQueue()

        {

            _queue = new ReactorQueue<InvokeReactorQueueRequest>(256);

        }



        public TInterface CreateProxy<TInterface>(IThreadInvoker invoker, TInterface implementation) where TInterface : class

        {

            return Proxies.MakeProxy<TInterface>(new InvokeReactorQueueProxyHandler(this, implementation, invoker));

        }



        public object CreateProxy(Type interfaceType, IThreadInvoker invoker, object implementation) 

        {

            return Proxies.MakeProxy(interfaceType, new InvokeReactorQueueProxyHandler(this, implementation, invoker));

        }



        public void Open(IServiceHost host)

        {

            _queue.StartDequeuingToCallback(host.Reactor, InvokeDequeued);

        }



        public void Close(IServiceHost host)

        {

            _queue.StopDequeuingToCallback();

        }



        void InvokeDequeued(ReactorQueue<InvokeReactorQueueRequest> queue, InvokeReactorQueueRequest item)

        {

            DeferredObject result;



            try

            {

                result = item.Method.Invoke(item.Implementation, item.Arguments) as DeferredObject;

            }

            catch (Exception e)

            {

                item.DeferredObject.Fail(DeferredFailure.FromException(e));



                return;

            }



            // Otherwise, if no failure occurred:

            result.ObjectCompletion(item.DeferredObject);

        }



        internal void AcceptRequest(MethodInfo method, object[] arguments, DeferredObject returnedDeferred, object implementation)

        {

            InvokeReactorQueueRequest request = new InvokeReactorQueueRequest(method, arguments, returnedDeferred, implementation);

            _queue.Enqueue(request);

        }

    }

}