Facilitates communication between an enlisted transaction participant and the transaction manager during the Prepare phase of the transaction.
(in System.Transactions.dll)
Visual Basic (Declaration)
Public Class PreparingEnlistment _
Inherits Enlistment
Dim instance As PreparingEnlistment
public class PreparingEnlistment : Enlistment
public ref class PreparingEnlistment : public Enlistment
public class PreparingEnlistment extends Enlistment
During the initial (prepare) phase of the transaction, the transaction manager passes this type to the resource manager by calling the Prepare method to obtain a resource's vote on the transaction. Depending on whether it votes to commit or roll back, your implementation of the resource manager should call the Prepared or ForceRollback methods of this type.
The resource manager can also call the Done method at anytime before it has called the Prepared method. By doing so, the enlistment is casting a read only vote, meaning that it votes commit on the transaction but does not need to receive the final outcome.
Durable resource managers can retrieve the information that is be needed by the transaction manager for re-enlistment from the RecoveryInformation property. For more information on recovery, see Performing Recovery.
Public Class EnlistmentClass
Implements IEnlistmentNotification
Public Sub Prepare(ByVal myPreparingEnlistment As PreparingEnlistment) Implements System.Transactions.IEnlistmentNotification.Prepare
Console.WriteLine("Prepare notification received")
'Perform transactional work
'If work finished correctly, reply with prepared
myPreparingEnlistment.Prepared()
End Sub
Public Sub Commit(ByVal myEnlistment As Enlistment) Implements System.Transactions.IEnlistmentNotification.Commit
Console.WriteLine("Commit notification received")
'Do any work necessary when commit notification is received
'Declare done on the enlistment
myEnlistment.Done()
End Sub
Public Sub Rollback(ByVal myEnlistment As Enlistment) Implements System.Transactions.IEnlistmentNotification.Rollback
Console.WriteLine("Rollback notification received")
'Do any work necessary when rollback notification is received
'Declare done on the enlistment
myEnlistment.Done()
End Sub
Public Sub InDoubt(ByVal myEnlistment As Enlistment) Implements System.Transactions.IEnlistmentNotification.InDoubt
Console.WriteLine("In doubt notification received")
'Do any work necessary when indout notification is received
'Declare done on the enlistment
myEnlistment.Done()
End Sub
End Class
class myEnlistmentClass : IEnlistmentNotification
{
public void Prepare(PreparingEnlistment preparingEnlistment)
{
Console.WriteLine("Prepare notification received");
//Perform transactional work
//If work finished correctly, reply prepared
preparingEnlistment.Prepared();
// otherwise, do a ForceRollback
preparingEnlistment.ForceRollback();
}
public void Commit(Enlistment enlistment)
{
Console.WriteLine("Commit notification received");
//Do any work necessary when commit notification is received
//Declare done on the enlistment
enlistment.Done();
}
public void Rollback(Enlistment enlistment)
{
Console.WriteLine("Rollback notification received");
//Do any work necessary when rollback notification is received
//Declare done on the enlistment
enlistment.Done();
}
public void InDoubt(Enlistment enlistment)
{
Console.WriteLine("In doubt notification received");
//Do any work necessary when indout notification is received
//Declare done on the enlistment
enlistment.Done();
}
}
Public Class EnlistmentClass
Implements IEnlistmentNotification
Public Sub Prepare(ByVal myPreparingEnlistment As PreparingEnlistment) Implements System.Transactions.IEnlistmentNotification.Prepare
Console.WriteLine("Prepare notification received")
'Perform transactional work
'If work finished correctly, reply with prepared
myPreparingEnlistment.Prepared()
End Sub
Public Sub Commit(ByVal myEnlistment As Enlistment) Implements System.Transactions.IEnlistmentNotification.Commit
Console.WriteLine("Commit notification received")
'Do any work necessary when commit notification is received
'Declare done on the enlistment
myEnlistment.Done()
End Sub
Public Sub Rollback(ByVal myEnlistment As Enlistment) Implements System.Transactions.IEnlistmentNotification.Rollback
Console.WriteLine("Rollback notification received")
'Do any work necessary when rollback notification is received
'Declare done on the enlistment
myEnlistment.Done()
End Sub
Public Sub InDoubt(ByVal myEnlistment As Enlistment) Implements System.Transactions.IEnlistmentNotification.InDoubt
Console.WriteLine("In doubt notification received")
'Do any work necessary when indout notification is received
'Declare done on the enlistment
myEnlistment.Done()
End Sub
End Class
class myEnlistmentClass : IEnlistmentNotification
{
public void Prepare(PreparingEnlistment preparingEnlistment)
{
Console.WriteLine("Prepare notification received");
//Perform transactional work
//If work finished correctly, reply prepared
preparingEnlistment.Prepared();
// otherwise, do a ForceRollback
preparingEnlistment.ForceRollback();
}
public void Commit(Enlistment enlistment)
{
Console.WriteLine("Commit notification received");
//Do any work necessary when commit notification is received
//Declare done on the enlistment
enlistment.Done();
}
public void Rollback(Enlistment enlistment)
{
Console.WriteLine("Rollback notification received");
//Do any work necessary when rollback notification is received
//Declare done on the enlistment
enlistment.Done();
}
public void InDoubt(Enlistment enlistment)
{
Console.WriteLine("In doubt notification received");
//Do any work necessary when indout notification is received
//Declare done on the enlistment
enlistment.Done();
}
}
System..::.Object
System.Transactions..::.Enlistment
System.Transactions..::.PreparingEnlistment
This type is thread safe.
Windows 7, Windows Vista, Windows XP SP2, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP Starter Edition, Windows Server 2008 R2, Windows Server 2008, Windows Server 2003, Windows Server 2000 SP4, Windows Millennium Edition, Windows 98
The .NET Framework and .NET Compact Framework do not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.
.NET Framework
Supported in: 3.5, 3.0, 2.0
Reference
Other Resources