Code:
/ DotNET / DotNET / 8.0 / untmp / whidbey / REDBITS / ndp / fx / src / xsp / System / Web / Util / Transactions.cs / 1 / Transactions.cs
//------------------------------------------------------------------------------ //// Copyright (c) Microsoft Corporation. All rights reserved. // //----------------------------------------------------------------------------- /* * Transactions support for ASP.NET pages * * Copyright (c) 2000, Microsoft Corporation */ namespace System.Web.Util { using System.Collections; using System.EnterpriseServices; using System.Security.Permissions; // // Delegate to the transacted managed code // ////// public delegate void TransactedCallback(); // // Delegate for the internal transacted execution // internal enum TransactedExecState { CommitPending = 0, AbortPending = 1, Error = 2 } internal delegate int TransactedExecCallback(); // return value 'int' for interop // // Utility class with to be called to do transactions // ///[To be supplied.] ////// [AspNetHostingPermission(SecurityAction.LinkDemand, Level=AspNetHostingPermissionLevel.Minimal)] [AspNetHostingPermission(SecurityAction.InheritanceDemand, Level=AspNetHostingPermissionLevel.Minimal)] public class Transactions { ///[To be supplied.] ////// public static void InvokeTransacted(TransactedCallback callback, TransactionOption mode) { bool aborted = false; InvokeTransacted(callback, mode, ref aborted); } ///[To be supplied.] ////// public static void InvokeTransacted(TransactedCallback callback, TransactionOption mode, ref bool transactionAborted) { // check for hosting permission even if no user code on the stack HttpRuntime.CheckAspNetHostingPermission(AspNetHostingPermissionLevel.Medium, SR.Transaction_not_supported_in_low_trust); bool executeWithoutTransaction = false; #if !FEATURE_PAL // FEATURE_PAL does not enable Transactions if (Environment.OSVersion.Platform != PlatformID.Win32NT || Environment.OSVersion.Version.Major <= 4) throw new PlatformNotSupportedException(SR.GetString(SR.RequiresNT)); #else // !FEATURE_PAL throw new NotImplementedException("ROTORTODO"); #endif // !FEATURE_PAL if (mode == TransactionOption.Disabled) executeWithoutTransaction = true; if (executeWithoutTransaction) { // bypass the transaction logic callback(); transactionAborted = false; return; } TransactedInvocation call = new TransactedInvocation(callback); TransactedExecCallback execCallback = new TransactedExecCallback(call.ExecuteTransactedCode); PerfCounters.IncrementCounter(AppPerfCounter.TRANSACTIONS_PENDING); int rc; try { rc = UnsafeNativeMethods.TransactManagedCallback(execCallback, (int)mode); } finally { PerfCounters.DecrementCounter(AppPerfCounter.TRANSACTIONS_PENDING); } // rethrow the expection originally caught in managed code if (call.Error != null) throw new HttpException(null, call.Error); PerfCounters.IncrementCounter(AppPerfCounter.TRANSACTIONS_TOTAL); if (rc == 1) { PerfCounters.IncrementCounter(AppPerfCounter.TRANSACTIONS_COMMITTED); transactionAborted = false; } else if (rc == 0) { PerfCounters.IncrementCounter(AppPerfCounter.TRANSACTIONS_ABORTED); transactionAborted = true; } else { throw new HttpException(SR.GetString(SR.Cannot_execute_transacted_code)); } } // Class with wrappers to ContextUtil that don't throw internal class Utils { private Utils() { } /* internal static String TransactionId { get { String id = null; try { id = ContextUtil.TransactionId.ToString(); } catch { } return id; } } */ internal static bool IsInTransaction { get { bool inTransaction = false; try { inTransaction = ContextUtil.IsInTransaction; } catch { } return inTransaction; } } internal static bool AbortPending { get { bool aborted = false; try { if (ContextUtil.MyTransactionVote == TransactionVote.Abort) aborted = true; } catch { } return aborted; } } } // Managed class encapsulating the transacted call internal class TransactedInvocation { private TransactedCallback _callback; private Exception _error; internal TransactedInvocation(TransactedCallback callback) { _callback = callback; } internal int ExecuteTransactedCode() { TransactedExecState state = TransactedExecState.CommitPending; try { _callback(); if (Transactions.Utils.AbortPending) state = TransactedExecState.AbortPending; } catch (Exception e) { _error = e; // remember exception to be rethrown back in managed code state = TransactedExecState.Error; } return (int)state; } internal Exception Error { get { return _error; } } } } }[To be supplied.] ///
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