Msmq3PoisonHandler.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 / Channels / Msmq3PoisonHandler.cs / 1 / Msmq3PoisonHandler.cs

                            //------------------------------------------------------------ 
// Copyright (c) Microsoft Corporation.  All rights reserved.
//-----------------------------------------------------------
namespace System.ServiceModel.Channels
{ 
    using System.Collections.Generic;
 
    sealed class Msmq3PoisonHandler: IPoisonHandlingStrategy 
    {
        const int maxTrackedMessages = 256; 

        MsmqReceiveHelper receiver;
        SortedList trackedMessages;
        object thisLock = new object(); 

        internal Msmq3PoisonHandler(MsmqReceiveHelper receiver) 
        { 
            this.receiver = receiver;
            this.trackedMessages = new SortedList(maxTrackedMessages); 
        }

        public bool CheckAndHandlePoisonMessage(MsmqMessageProperty messageProperty)
        { 
            long lookupId = messageProperty.LookupId;
            int seen; 
 
            lock (thisLock)
            { 
                seen = this.UpdateSeenCount(lookupId);
                if (seen > (receiver.MsmqReceiveParameters.ReceiveRetryCount + 1) && receiver.MsmqReceiveParameters.ReceiveRetryCount != Int32.MaxValue)
                {
                    FinalDisposition(messageProperty); 
                    this.trackedMessages.Remove(lookupId);
                    return true; 
                } 
            }
 
            messageProperty.AbortCount = seen - 1;
            return false;
        }
 
        public void FinalDisposition(MsmqMessageProperty messageProperty)
        { 
            switch (receiver.MsmqReceiveParameters.ReceiveErrorHandling) 
            {
                case ReceiveErrorHandling.Drop: 
                    this.receiver.DropOrRejectReceivedMessage(messageProperty, false);
                    break;

                case ReceiveErrorHandling.Fault: 
                    MsmqReceiveHelper.TryAbortTransactionCurrent();
                    if (null != this.receiver.ChannelListener) 
                        this.receiver.ChannelListener.FaultListener(); 
                    if (null != this.receiver.Channel)
                        this.receiver.Channel.FaultChannel(); 
                    break;
                default:
                    DiagnosticUtility.DebugAssert("System.ServiceModel.Channels.Msmq3PoisonHandler.FinalDisposition(): (unexpected ReceiveErrorHandling)");
                    break; 
            }
        } 
 
        int UpdateSeenCount(long lookupId)
        { 
            int value;
            if (this.trackedMessages.TryGetValue(lookupId, out value))
            {
                ++ value; 
                this.trackedMessages[lookupId] = value;
                return value; 
            } 
            else
            { 
                if (maxTrackedMessages == this.trackedMessages.Count)
                {
                    this.trackedMessages.RemoveAt(0);
                } 
                this.trackedMessages.Add(lookupId, 1);
                return 1; 
            } 
        }
 
        public void Open()
        {}

        public void Dispose() 
        {}
    } 
} 

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

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