Synnefo » Pithos MS Client

#region

/* -----------------------------------------------------------------------

 * <copyright file="IdleBatch.cs" company="GRNet">

 * 

 * Copyright 2011-2012 GRNET S.A. All rights reserved.

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#endregion

using System.Reflection;

using System.Threading;

using System.Threading.Tasks.Dataflow;

using System;

using log4net;

namespace Pithos.Core.Agents

{

    /// <summary>

    /// Calls a callback function if an idle timeout expires after the last post

    /// </summary>

    public class IdleBatch<T>

    {

        private static readonly ILog Log = LogManager.GetLogger(MethodBase.GetCurrentMethod().DeclaringType);

        readonly Timer _triggerTimer;

        private readonly BatchBlock<T> _batchBlock;

        private readonly TransformBlock<T, T> _timerBlock;

        private readonly ActionBlock<T[]> _processBlock;

        private readonly int _timeOut;

        public IdleBatch(int idleTimeout, Action<T[]> action)

        {

            _timeOut = idleTimeout;

            _timerBlock = new TransformBlock<T, T>(t =>

            {

                _triggerTimer.Change(_timeOut, Timeout.Infinite);

                return t;

            });

            _batchBlock = new BatchBlock<T>(9999);

            _processBlock = new ActionBlock<T[]>(action);

            _timerBlock.LinkTo(_batchBlock);

            _batchBlock.LinkTo(_processBlock);

            _timerBlock.Completion.ContinueWith(_ => _batchBlock.Complete());

            _batchBlock.Completion.ContinueWith(_ => _processBlock.Complete());

            _triggerTimer = new Timer(_ => _batchBlock.TriggerBatch());

        }

        public void Post(T input)

        {

            _timerBlock.Post(input);

        }

        public void ForceTrigger()

        {

            _batchBlock.TriggerBatch();

            _timerBlock.Complete();

            _processBlock.Completion.Wait();

        }

    }

}