MessageQueueTransaction.cs source code in C# .NET

                        Code:
                         / 4.0 / 4.0 / untmp / DEVDIV_TFS / Dev10 / Releases / RTMRel / ndp / fx / src / Services / Messaging / System / Messaging / MessageQueueTransaction.cs / 1305376 / MessageQueueTransaction.cs
                        
                        
                            //------------------------------------------------------------------------------ 
// 
//     Copyright (c) Microsoft Corporation.  All rights reserved.
// 
//----------------------------------------------------------------------------- 

namespace System.Messaging { 
    using System.Threading; 
    using System.Diagnostics;
    using System.Messaging.Interop; 

    /// 
    /// 
    ///    [To be supplied.] 
    /// 
    public class MessageQueueTransaction : IDisposable { 
        private ITransaction internalTransaction; 
        private MessageQueueTransactionStatus transactionStatus;
        private bool disposed; 

        /// 
        /// 
        ///     
        ///       Creates a new Message Queuing internal transaction context.
        ///     
        ///  
        public MessageQueueTransaction() {
            this.transactionStatus = MessageQueueTransactionStatus.Initialized; 
        }

        internal ITransaction InnerTransaction {
            get { 
                return this.internalTransaction;
            } 
        } 

        ///  
        /// 
        ///    
        ///       The status of the transaction that this object represents.
        ///     
        /// 
        public MessageQueueTransactionStatus Status { 
            get { 
                return this.transactionStatus;
            } 
        }

        /// 
        ///  
        ///    
        ///       Rolls back the pending internal transaction. 
        ///     
        /// 
        public void Abort() { 
            lock (this) {
                if (this.internalTransaction == null)
                    throw new InvalidOperationException(Res.GetString(Res.TransactionNotStarted));
                else { 
                    this.AbortInternalTransaction();
                } 
            } 
        }
 
        /// 
        /// 
        private void AbortInternalTransaction() {
            int status = this.internalTransaction.Abort(0, 0, 0); 
            if (MessageQueue.IsFatalError(status))
                throw new MessageQueueException(status); 
 
            this.internalTransaction = null;
            this.transactionStatus = MessageQueueTransactionStatus.Aborted; 
        }

        /// 
        ///  
        ///    
        ///       Begins a new Message Queuing internal transaction context. 
        ///     
        /// 
        public void Begin() { 
            //Won't allow begining a new transaction after the object has been disposed.
            if (this.disposed)
                throw new ObjectDisposedException(GetType().Name);
 
            lock (this) {
                if (internalTransaction != null) 
                    throw new InvalidOperationException(Res.GetString(Res.TransactionStarted)); 
                else {
                    int status = SafeNativeMethods.MQBeginTransaction(out this.internalTransaction); 
                    if (MessageQueue.IsFatalError(status)) {
                        this.internalTransaction = null;
                        throw new MessageQueueException(status);
                    } 

                    this.transactionStatus = MessageQueueTransactionStatus.Pending; 
                } 
            }
        } 

        /// 
        /// 
        internal ITransaction BeginQueueOperation() { 
#pragma warning disable 0618
            //@ 
            Monitor.Enter(this); 
#pragma warning restore 0618
            return this.internalTransaction; 
        }

        /// 
        ///  
        ///    
        ///       Commits a pending internal transaction. 
        ///     
        /// 
        public void Commit() { 
            lock (this) {
                if (this.internalTransaction == null)
                    throw new InvalidOperationException(Res.GetString(Res.TransactionNotStarted));
                else { 
                    int status = this.internalTransaction.Commit(0, 0, 0);
                    if (MessageQueue.IsFatalError(status)) 
                        throw new MessageQueueException(status); 

                    this.internalTransaction = null; 
                    this.transactionStatus = MessageQueueTransactionStatus.Committed;
                }
            }
        } 

        ///  
        ///  
        ///    
        ///       Disposes this transaction instance, if it is in a 
        ///       pending status, the transaction will be aborted.
        ///    
        /// 
        public void Dispose() { 
            Dispose(true);
            GC.SuppressFinalize(this); 
        } 

        ///  
        /// 
        ///    
        ///    
        ///  
        protected virtual void Dispose(bool disposing) {
            if (disposing) { 
                lock (this) { 
                    if (internalTransaction != null)
                        this.AbortInternalTransaction(); 
                }
            }

            this.disposed = true; 
        }
 
        ///  
        /// 
        ~MessageQueueTransaction() { 
            Dispose(false);
        }

        ///  
        /// 
        internal void EndQueueOperation() { 
            Monitor.Exit(this); 
        }
    } 
}

// File provided for Reference Use Only by Microsoft Corporation (c) 2007.
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MessageQueueTransaction.cs source code in C# .NET

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