DbRetry.cs source code in C# .NET

Source code for the .NET framework in C#

                        
Code:

                         / 4.0 / 4.0 / untmp / DEVDIV_TFS / Dev10 / Releases / RTMRel / ndp / cdf / src / WF / RunTime / DbRetry.cs / 1305376 / DbRetry.cs
                        

                        
                            using System; 
using System.Collections.Generic;
using System.Text;
using System.Threading;
 
namespace System.Workflow.Runtime
{ 
    internal class DbRetry 
    {
        private const short _defaultMaxRetries = 20; 
        private const int _defaultRetrySleep = 2000;
        private const short _spinCount = 3;

        private short _maxRetries = _defaultMaxRetries; 
        private int _retrySleep = _defaultRetrySleep;
        private bool _enableRetries = false; 
 
        protected DbRetry()
        { 
        }

        internal DbRetry(bool enableRetries)
        { 
            _enableRetries = enableRetries;
        } 
 
        internal short MaxRetries
        { 
            get { return _maxRetries; }
        }

        internal bool TryDoRetry(ref short retryCount) 
        {
            if (CanRetry(retryCount++)) 
            { 
                RetrySleep(retryCount);
                return true; 
            }
            else
                return false;
        } 

        internal bool CanRetry(short retryCount) 
        { 
            if (!_enableRetries)
                return false; 

            if (retryCount < _maxRetries)
                return true;
            else 
                return false;
        } 
 
        internal void RetrySleep(short retryCount)
        { 
            //
            // For the first couple of retries just spin
            // If we fail _spinCount times start then introduce a sleep
            if (retryCount <= _spinCount) 
                return;
 
            int sleep = _retrySleep * retryCount; 
            Thread.Sleep(sleep);
        } 
    }
}

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

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