Transaction.DependentClone メソッド
アセンブリ: System.Transactions (system.transactions.dll 内)
構文
Dim instance As Transaction Dim cloneOption As DependentCloneOption Dim returnValue As DependentTransaction returnValue = instance.DependentClone(cloneOption)
戻り値
依存する複製を表す DependentTransaction。
依存トランザクションとは、その結果が複製元のトランザクションの結果によって決まるトランザクションです。
cloneoption パラメータは、作成する依存トランザクションの種類を制御します。BlockCommitUntilComplete で依存トランザクションが作成されると、その依存トランザクションは、トランザクションがタイムアウトするか、DependentTransaction に対して Complete が呼び出されるまで、トランザクションのコミット プロセスをブロックします。RollbackIfNotComplete で作成された場合は、DependentTransaction に対して Complete が呼び出される前に Commit が呼び出されると、トランザクションを自動的に中止します。
Public Shared Sub Main() Try Using scope As TransactionScope = New TransactionScope() 'Perform transactional work here. 'Queue work item ThreadPool.QueueUserWorkItem(AddressOf WorkerThread, Transaction.Current.DependentClone(DependentCloneOption.BlockCommitUntilComplete)) 'Display transaction information Console.WriteLine("Transaction information:") Console.WriteLine("ID: {0}", Transaction.Current.TransactionInformation.LocalIdentifier) Console.WriteLine("status: {0}", Transaction.Current.TransactionInformation.Status) Console.WriteLine("isolationlevel: {0}", Transaction.Current.IsolationLevel) 'Call Complete on the TransactionScope based on console input Dim c As ConsoleKeyInfo While (True) Console.Write("Complete the transaction scope? [Y|N] ") c = Console.ReadKey() Console.WriteLine() If (c.KeyChar = "Y") Or (c.KeyChar = "y") Then scope.Complete() Exit While ElseIf ((c.KeyChar = "N") Or (c.KeyChar = "n")) Then Exit While End If End While End Using Catch ex As TransactionException Console.WriteLine(ex) Catch Console.WriteLine("Cannot complete transaction") Throw End Try End Sub Public Shared Sub WorkerThread(ByVal myTransaction As Object) 'Create a DependentTransaction from the object passed to the WorkerThread Dim dTx As DependentTransaction dTx = CType(myTransaction, DependentTransaction) 'Sleep for 1 second to force the worker thread to delay Thread.Sleep(1000) 'Pass the DependentTransaction to the scope, so that work done in the scope becomes part of the transaction passed to the worker thread Using ts As TransactionScope = New TransactionScope(dTx) 'Perform transactional work here. 'Call complete on the transaction scope ts.Complete() End Using 'Call complete on the dependent transaction dTx.Complete() End Sub
static void Main(string[] args) { try { using (TransactionScope scope = new TransactionScope()) { // Perform transactional work here. //Queue work item ThreadPool.QueueUserWorkItem(new WaitCallback(WorkerThread), Transaction.Current.DependentClone(DependentCloneOption.BlockCommitUntilComplete)); //Display transaction information Console.WriteLine("Transaction information:"); Console.WriteLine("ID: {0}", Transaction.Current.TransactionInformation.LocalIdentifier); Console.WriteLine("status: {0}", Transaction.Current.TransactionInformation.Status); Console.WriteLine("isolationlevel: {0}", Transaction.Current.IsolationLevel); //Call Complete on the TransactionScope based on console input ConsoleKeyInfo c; while (true) { Console.Write("Complete the transaction scope? [Y|N] "); c = Console.ReadKey(); Console.WriteLine(); if ((c.KeyChar == 'Y') || (c.KeyChar == 'y')) { //Call complete on the scope scope.Complete(); break; } else if ((c.KeyChar == 'N') || (c.KeyChar == 'n')) { break; } } } } catch (System.Transactions.TransactionException ex) { Console.WriteLine(ex); } catch { Console.WriteLine("Cannot complete transaction"); throw; } } private static void WorkerThread(object transaction) { //Create a DependentTransaction from the object passed to the WorkerThread DependentTransaction dTx = (DependentTransaction)transaction; //Sleep for 1 second to force the worker thread to delay Thread.Sleep(1000); //Pass the DependentTransaction to the scope, so that work done in the scope becomes part of the transaction passed to the worker thread using (TransactionScope ts = new TransactionScope(dTx)) { //Perform transactional work here. //Call complete on the transaction scope ts.Complete(); } //Call complete on the dependent transaction dTx.Complete(); }
Windows 98, Windows 2000 SP4, Windows Millennium Edition, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition
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