TransSynchronizationAgent Class

مقالة
04/26/2013

Provides the functionality of the Replication Distribution Agent.

Inheritance Hierarchy

System.Object
System.MarshalByRefObject
Microsoft.SqlServer.Replication.TransSynchronizationAgent

Namespace: Microsoft.SqlServer.Replication
Assembly: Microsoft.SqlServer.Replication (in Microsoft.SqlServer.Replication.dll)

Syntax

'Declaration
<ClassInterfaceAttribute(ClassInterfaceType.AutoDispatch)> _
<GuidAttribute("adeda98a-bdfc-4029-b6fb-991d6b468395")> _
<ComVisibleAttribute(True)> _
<PermissionSetAttribute(SecurityAction.Demand, Name := "FullTrust")> _
Public Class TransSynchronizationAgent _
    Inherits MarshalByRefObject _
    Implements IDisposable, ITransSynchronizationAgent
'Usage
Dim instance As TransSynchronizationAgent

[ClassInterfaceAttribute(ClassInterfaceType.AutoDispatch)]
[GuidAttribute("adeda98a-bdfc-4029-b6fb-991d6b468395")]
[ComVisibleAttribute(true)]
[PermissionSetAttribute(SecurityAction.Demand, Name = "FullTrust")]
public class TransSynchronizationAgent : MarshalByRefObject, 
    IDisposable, ITransSynchronizationAgent

[ClassInterfaceAttribute(ClassInterfaceType::AutoDispatch)]
[GuidAttribute(L"adeda98a-bdfc-4029-b6fb-991d6b468395")]
[ComVisibleAttribute(true)]
[PermissionSetAttribute(SecurityAction::Demand, Name = L"FullTrust")]
public ref class TransSynchronizationAgent : public MarshalByRefObject, 
    IDisposable, ITransSynchronizationAgent

[<ClassInterfaceAttribute(ClassInterfaceType.AutoDispatch)>]
[<GuidAttribute("adeda98a-bdfc-4029-b6fb-991d6b468395")>]
[<ComVisibleAttribute(true)>]
[<PermissionSetAttribute(SecurityAction.Demand, Name = "FullTrust")>]
type TransSynchronizationAgent =  
    class 
        inherit MarshalByRefObject 
        interface IDisposable 
        interface ITransSynchronizationAgent 
    end

public class TransSynchronizationAgent extends MarshalByRefObject implements IDisposable, ITransSynchronizationAgent

The TransSynchronizationAgent type exposes the following members.

Constructors

	Name	Description
	TransSynchronizationAgent	Creates an instance of the TransSynchronizationAgent class.

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Properties

	Name	Description
	AltSnapshotFolder	Gets or sets the alternate snapshot folder for the subscription.
	ComErrorCollection	Gets a collection of errors that are generated by the replication agent.
	Distributor	Gets or sets the name of the instance of Microsoft SQL Server that is acting as the distributor for the subscription.
	DistributorAddress	Gets or sets the network address that is used to connect to the distributor when the DistributorNetwork property is specified.
	DistributorEncryptedPassword	Infrastructure. Gets or sets the encrypted password that is used when connecting to the distributor by using SQL Server Authentication.
	DistributorLogin	Gets or sets the login name that is used when connecting to the distributor by using SQL Server Authentication.
	DistributorNetwork	Gets or sets the client Net-Library that is used when connecting to the distributor.
	DistributorPassword	Gets or sets the password that is used when connecting to the Distributor by using SQL Server Authentication.
	DistributorSecurityMode	Gets or sets the security mode that is used when connecting to the distributor.
	DtsPackageFileName	Gets or sets the name and path of a Microsoft SQL Server 2000 Data Transformation Services (DTS) package that is used to transform command rowsets before they are applied to a Subscriber.
	DtsPackagePassword	Gets or sets the owner password that used to access the Microsoft SQL Server 2000 Data Transformation Services (DTS) package specified by the DtsPackageFileName property.
	FileTransferType	Gets or sets how the initial snapshot files are transferred to the Subscriber.
	HostName	Infrastructure. Gets or sets the host name used.
	LastUpdatedTime	Gets the timestamp of the last time that replication agent synchronized the subscription.
	LoginTimeout	Gets or sets the maximum number of seconds to wait for connections to be established.
	MaxDeliveredTransactions	Gets or sets the maximum number of transactions that are applied to the Subscriber during a single agent execution.
	Output	Gets or sets the file name and path of the agent output file.
	OutputVerboseLevel	Gets or sets the amount of information that is logged by the Distribution Agent in the agent output file.
	ProfileName	Gets or sets the name of the profile that is used by the agent.
	Publication	Gets or sets the name of the publication.
	Publisher	Gets or sets the name of the instance of Microsoft SQL Server that is the Publisher for the subscription.
	PublisherDatabase	Gets or sets the name of the publication database.
	QueryTimeout	Gets or sets the number of seconds that are allowed for internal queries to complete.
	SecureDistributorEncryptedPassword	Infrastructure. Gets or sets the secure encrypted password for the distributor.
	SecureSubscriberEncryptedPassword	Infrastructure. Gets or sets the secure encrypted password for the subscriber.
	SkipErrors	Gets or sets a colon-separated list of the error numbers that are to be skipped by this agent.
	Subscriber	Gets or sets the name of the instance of Microsoft SQL Server that is the subscriber.
	SubscriberDatabase	Gets or sets the name of the subscription database.
	SubscriberDatabasePath	Infrastructure. Get or sets the database path for the subscriber.
	SubscriberDataSourceType	Gets or sets the type of data source that is used as the subscriber.
	SubscriberEncryptedPassword	Infrastructure. Gets or sets the encrypted password for the subscriber.
	SubscriberLogin	Gets or sets the login name that is used when connecting to the subscriber by using SQL Server Authentication.
	SubscriberPassword	Gets or sets the password that is used when connecting to the subscriber by using SQL Server Authentication.
	SubscriberSecurityMode	Gets or sets the security mode that is used when connecting to the publisher.
	SubscriptionType	Gets or sets whether the subscription is a push or pull subscription.
	UndeliveredCommands	Infrastructure. Gets the number of undelivered commands.
	UndeliveredTransactions	Infrastructure. Gets the number of undelivered transactions.
	UseInProcLoader	Gets or sets a value that indicates whether to use the BULK INSERT command when applying snapshot files at the subscriber.
	WorkingDirectory	Gets or sets the working directory from which snapshot files are accessed when File Transfer Protocol (FTP) is used.

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Methods

	Name	Description
	Abort	Infrastructure. Aborts the TransSynchronizationAgent operation.
	CreateObjRef	Security Critical. (Inherited from MarshalByRefObject.)
	Dispose()	Infrastructure. Releases all resources used by the current instance of the TransSynchronizationAgent class.
	Dispose(Boolean)	Releases all resources used by the TransSynchronizationAgent class.
	Equals	(Inherited from Object.)
	Finalize	Infrastructure. Finalizes the TransSynchronizationAgent. (Overrides Object.Finalize().)
	GetHashCode	(Inherited from Object.)
	GetLifetimeService	Security Critical. (Inherited from MarshalByRefObject.)
	GetType	(Inherited from Object.)
	InitializeLifetimeService	Security Critical. (Inherited from MarshalByRefObject.)
	IsSnapshotRequired	Connects to the Distributor and the Subscriber to determine whether a new snapshot will be applied during the next agent synchronization.
	MemberwiseClone()	(Inherited from Object.)
	MemberwiseClone(Boolean)	(Inherited from MarshalByRefObject.)
	Synchronize	Starts the Distribution Agent to synchronize the subscription.
	ToString	(Inherited from Object.)

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Events

	Name	Description
	ComStatus	Infrastructure. Occurs when the Distribution Agent returns synchronization Com status information.
	Status	Occurs when the Distribution Agent returns synchronization status information.

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Remarks

The TransSynchronizationAgent class supports the ability to programmatically synchronize subscriptions to transactional or snapshot publications.

Examples

In the following example, the Synchronize method is called on the instance of the TransSynchronizationAgent class that is accessed from the SynchronizationAgent property to synchronize the push subscription.

         // Define the server, publication, and database names.
            string subscriberName = subscriberInstance;
            string publisherName = publisherInstance;
            string publicationName = "AdvWorksProductTran";
            string subscriptionDbName = "AdventureWorks2012Replica";
            string publicationDbName = "AdventureWorks2012";

            // Create a connection to the Publisher.
            ServerConnection conn = new ServerConnection(publisherName);

            TransSubscription subscription;

            try
            {
                // Connect to the Publisher.
                conn.Connect();

                // Define the push subscription.
                subscription = new TransSubscription();
                subscription.ConnectionContext = conn;
                subscription.DatabaseName = publicationDbName;
                subscription.PublicationName = publicationName;
                subscription.SubscriptionDBName = subscriptionDbName;
                subscription.SubscriberName = subscriberName;

                // If the push subscription exists, start the synchronization.
                if (subscription.LoadProperties())
                {
                    // Check that we have enough metadata to start the agent.
                    if (subscription.SubscriberSecurity != null)
                    {
                        // Synchronously start the Distribution Agent for the subscription.
                        subscription.SynchronizationAgent.Synchronize();
                    }
                    else
                    {
                        throw new ApplicationException("There is insufficent metadata to " +
                            "synchronize the subscription. Recreate the subscription with " +
                            "the agent job or supply the required agent properties at run time.");
                    }
                }
                else
                {
                    // Do something here if the push subscription does not exist.
                    throw new ApplicationException(String.Format(
                        "The subscription to '{0}' does not exist on {1}",
                        publicationName, subscriberName));
                }
            }
            catch (Exception ex)
            {
                // Implement appropriate error handling here.
                throw new ApplicationException("The subscription could not be synchronized.", ex);
            }
            finally
            {
                conn.Disconnect();
            }

' Define the server, publication, and database names.
Dim subscriberName As String = subscriberInstance
Dim publisherName As String = publisherInstance
Dim publicationName As String = "AdvWorksProductTran"
Dim subscriptionDbName As String = "AdventureWorks2012Replica"
Dim publicationDbName As String = "AdventureWorks2012"

' Create a connection to the Publisher.
Dim conn As ServerConnection = New ServerConnection(publisherName)

Dim subscription As TransSubscription

Try
    ' Connect to the Publisher.
    conn.Connect()

    ' Define the push subscription.
    subscription = New TransSubscription()
    subscription.ConnectionContext = conn
    subscription.DatabaseName = publicationDbName
    subscription.PublicationName = publicationName
    subscription.SubscriptionDBName = subscriptionDbName
    subscription.SubscriberName = subscriberName

    ' If the push subscription exists, start the synchronization.
    If subscription.LoadProperties() Then
        ' Check that we have enough metadata to start the agent.
        If Not subscription.SubscriberSecurity Is Nothing Then

            ' Synchronously start the Distribution Agent for the subscription.
            subscription.SynchronizationAgent.Synchronize()
        Else
            Throw New ApplicationException("There is insufficent metadata to " + _
             "synchronize the subscription. Recreate the subscription with " + _
             "the agent job or supply the required agent properties at run time.")
        End If
    Else
        ' Do something here if the push subscription does not exist.
        Throw New ApplicationException(String.Format( _
         "The subscription to '{0}' does not exist on {1}", _
         publicationName, subscriberName))
    End If
Catch ex As Exception
    ' Implement appropriate error handling here.
    Throw New ApplicationException("The subscription could not be synchronized.", ex)
Finally
    conn.Disconnect()
End Try

Thread Safety

The TransSynchronizationAgent class does not support multithreaded apartments. You can specify a single-threaded apartment by declaring the [STAThread] attribute on the method that is the main entry point for the application. This is the default for Microsoft Windows-based applications that are created by using Microsoft Visual Studio.

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