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TransPullSubscription Class

  • مقالة

Represents a pull subscription to a transactional publication.

Inheritance Hierarchy

System.Object
  Microsoft.SqlServer.Replication.ReplicationObject
    Microsoft.SqlServer.Replication.PullSubscription
      Microsoft.SqlServer.Replication.TransPullSubscription

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

Syntax

'Declaration
Public NotInheritable Class TransPullSubscription _
    Inherits PullSubscription
'Usage
Dim instance As TransPullSubscription

public sealed class TransPullSubscription : PullSubscription

public ref class TransPullSubscription sealed : public PullSubscription

[<SealedAttribute>]
type TransPullSubscription =  
    class 
        inherit PullSubscription 
    end

public final class TransPullSubscription extends PullSubscription

The TransPullSubscription type exposes the following members.

Constructors

  Name Description
Public method TransPullSubscription() Creates a new instance of the TransPullSubscription class.
Public method TransPullSubscription(String, String, String, String, ServerConnection) Creates a new instance of the TransPullSubscription class with the properties that define a pull subscription.
Public method TransPullSubscription(String, String, String, String, ServerConnection, Boolean) Creates a new instance of the TransPullSubscription class with the properties that define a pull subscription, and whether or not to create the agent job for the subscription.

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Properties

  Name Description
Public property AgentJobId Gets the ID of the agent job used to synchronize the subscription. (Inherited from PullSubscription.)
Public property AgentOffload Gets or sets whether or not the Synchronization Agent runs on a computer other than the one where the agent job was created. This property is no longer supported for Distributors running Microsoft SQL Server 2005 and later. (Inherited from PullSubscription.)
Public property AgentOffloadServer Gets or sets the name of the remote computer where the agent runs when using remote agent activation. (Inherited from PullSubscription.)
Public property AgentSchedule Gets the schedule for the agent job used to synchronize the subscription. (Inherited from PullSubscription.)
Public property AltSnapshotFolder Gets or sets the location where the publication snapshot files are obtained when the default snapshot location at the Distributor is not used. (Inherited from PullSubscription.)
Public property Attributes Gets or sets the attributes of a transactional publication that are supported by the subscription.
Public property CachePropertyChanges Gets or sets whether to cache changes made to the replication properties or to apply them immediately. (Inherited from ReplicationObject.)
Public property ConnectionContext Gets or sets the connection to an instance of Microsoft SQL Server. (Inherited from ReplicationObject.)
Public property CreateSyncAgentByDefault Gets or sets whether or not the agent job used to start the Replication Agent to synchronize the subscription is created when the subscription is created. (Inherited from PullSubscription.)
Public property DatabaseName Gets or sets the name of the subscription database. (Inherited from PullSubscription.)
Public property Description Gets or sets a textual description of the pull subscription. (Inherited from PullSubscription.)
Public property DistributorName Gets or sets the instance of Microsoft SQL Server that is the Distributor and is distributing the publication to which the subscription subscribes. (Inherited from PullSubscription.)
Public property DistributorSecurity Gets the security context used to connect to the Distributor. (Inherited from PullSubscription.)
Public property DtsPackageLocation Gets or sets the location of the Data Transformation Services (DTS) package used with a transformable subscription.
Public property DtsPackageName Gets or sets the Data Transformation Services (DTS) package name used in a transformable subscription.
Public property DtsPackagePassword Sets the password that is used with a transformable subscription.
Public property EnabledForSynchronizationManager Specifies whether or not the subscription can be synchronized using Windows Synchronization Manager. (Inherited from PullSubscription.)
Public property FtpAddress Infrastructure. Gets or sets the IP address of the FTP server. (Inherited from PullSubscription.)
Public property FtpLogin Infrastructure. Gets or sets the FTP login. (Inherited from PullSubscription.)
Public property FtpPassword Infrastructure. Gets or sets the FTP password. (Inherited from PullSubscription.)
Public property FtpPort Infrastructure. Gets or sets the port number for the FTP server. (Inherited from PullSubscription.)
Public property IsExistingObject Gets whether the object exists on the server or not. (Inherited from ReplicationObject.)
Public property LastAgentDateTime Gets the date and time when the subscription was last synchronized. (Inherited from PullSubscription.)
Public property LastAgentStatus Gets the status of the most recent synchronization of the subscription. (Inherited from PullSubscription.)
Public property LastAgentSummary Gets a summary of the result of the most recent synchronization of the subscription. (Inherited from PullSubscription.)
Public property LastSummaryDateTime Gets the date and time that the last synchronization was completed.
Public property Name Gets the name generated for the pull subscription. (Inherited from PullSubscription.)
Public property PublicationDBName Gets or sets the name of the publication database. (Inherited from PullSubscription.)
Public property PublicationName Gets or sets the name of the publication to which the subscription subscribes. (Inherited from PullSubscription.)
Public property PublisherName Gets or sets the name of the Publisher. (Inherited from PullSubscription.)
Public property PublisherSecurity Gets or sets the security context used by the Synchronization Agent when connecting to the Publisher. (Inherited from PullSubscription.)
Public property SecureFtpPassword Infrastructure. Gets or sets the secured password for the login used to connect to the FTP server. (Inherited from PullSubscription.)
Public property SqlServerName Gets the name of the Microsoft SQL Server instance to which this object is connected. (Inherited from ReplicationObject.)
Public property SubscriberSecurity Gets the security context that is used by the Synchronization Agent when connecting to the Subscriber. (Inherited from PullSubscription.)
Public property SubscriberType Gets or sets the updating behavior of the subscription.
Public property SubscriptionId Gets the subscription ID value. (Inherited from PullSubscription.)
Public property SubscriptionType Gets whether the subscription registration is for a push, pull, or anonymous subscription. (Inherited from PullSubscription.)
Public property SynchronizationAgent Gets an object that represents an instance of the Distribution Agent that can be used to synchronize the subscription.
Public property SynchronizationAgentProcessSecurity Gets the security context that is used to specify the Microsoft Windows account under which the Synchronization Agent job runs to synchronize the subscription. (Inherited from PullSubscription.)
Public property Type Infrastructure. Gets or sets the publication type. (Inherited from PullSubscription.)
Public property UseFtp Gets or sets whether or not the snapshot files needed to initialize the pull subscription are accessed by the Synchronization Agent using File Transfer Protocol (FTP). (Inherited from PullSubscription.)
Public property UserData Gets or sets an object property that allows users to attach their own data to the object. (Inherited from ReplicationObject.)
Public property WorkingDirectory Gets or sets the path of the directory at the Subscriber that is used to temporarily store and decompress downloaded snapshot files. (Inherited from PullSubscription.)

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Methods

  Name Description
Public method CommitPropertyChanges Sends all the cached property change statements to the instance of Microsoft SQL Server. (Inherited from ReplicationObject.)
Public method Create Creates the pull subscription on the Subscriber. (Inherited from PullSubscription.)
Public method Decouple Decouples the referenced replication object from the server. (Inherited from ReplicationObject.)
Public method Equals (Inherited from Object.)
Public method GetHashCode (Inherited from Object.)
Public method GetType (Inherited from Object.)
Public method LastAgentJobHistoryInfo Returns information on the last Synchronization Agent job that was run. (Inherited from PullSubscription.)
Public method Load Loads the properties of an existing object from the server. (Inherited from ReplicationObject.)
Public method LoadProperties Loads the properties of an existing object from the server. (Inherited from ReplicationObject.)
Public method Refresh Reloads the properties of the object. (Inherited from ReplicationObject.)
Public method Reinitialize Marks the pull subscription for reinitialization.
Public method Remove Removes the pull subscription. (Inherited from PullSubscription.)
Public method Script Returns a Transact-SQL script to create or delete the pull subscription based on the current property setting of the PullSubscription object. (Inherited from PullSubscription.)
Public method StopSynchronizationJob Attempts to stop a running Distribution Agent job that is currently synchronizing the subscription. (Overrides PullSubscription.StopSynchronizationJob().)
Public method SynchronizeWithJob Starts the agent job to synchronize the subscription. (Overrides PullSubscription.SynchronizeWithJob().)
Public method ToString (Inherited from Object.)

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Remarks

For a pull subscription, the Distribution Agent runs at the Subscriber.

Thread Safety

Any public static (Shared in Microsoft Visual Basic) members of this type are safe for multithreaded operations. Any instance members are not guaranteed to be thread safe.

Examples

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

            //Create connections to the Publisher and Subscriber.
            ServerConnection subscriberConn = new ServerConnection(subscriberName);
            ServerConnection publisherConn = new ServerConnection(publisherName);

            // Create the objects that we need.
            TransPublication publication;
            TransPullSubscription subscription;

            try
            {
                // Connect to the Publisher and Subscriber.
                subscriberConn.Connect();
                publisherConn.Connect();

                // Ensure that the publication exists and that 
                // it supports pull subscriptions.
                publication = new TransPublication();
                publication.Name = publicationName;
                publication.DatabaseName = publicationDbName;
                publication.ConnectionContext = publisherConn;

                if (publication.IsExistingObject)
                {
                    if ((publication.Attributes & PublicationAttributes.AllowPull) == 0)
                    {
                        publication.Attributes |= PublicationAttributes.AllowPull;
                    }

                    // Define the pull subscription.
                    subscription = new TransPullSubscription();
                    subscription.ConnectionContext = subscriberConn;
                    subscription.PublisherName = publisherName;
                    subscription.PublicationName = publicationName;
                    subscription.PublicationDBName = publicationDbName;
                    subscription.DatabaseName = subscriptionDbName;

                    // Specify the Windows login credentials for the Distribution Agent job.
                    subscription.SynchronizationAgentProcessSecurity.Login = winLogin;
                    subscription.SynchronizationAgentProcessSecurity.Password = winPassword;

                    // Make sure that the agent job for the subscription is created.
                    subscription.CreateSyncAgentByDefault = true;

                    // By default, subscriptions to transactional publications are synchronized 
                    // continuously, but in this case we only want to synchronize on demand.
                    subscription.AgentSchedule.FrequencyType = ScheduleFrequencyType.OnDemand;

                    // Create the pull subscription at the Subscriber.
                    subscription.Create();

                    Boolean registered = false;

                    // Verify that the subscription is not already registered.
                    foreach (TransSubscription existing
                        in publication.EnumSubscriptions())
                    {
                        if (existing.SubscriberName == subscriberName
                            && existing.SubscriptionDBName == subscriptionDbName)
                        {
                            registered = true;
                        }
                    }
                    if (!registered)
                    {
                        // Register the subscription with the Publisher.
                        publication.MakePullSubscriptionWellKnown(
                            subscriberName, subscriptionDbName,
                            SubscriptionSyncType.Automatic,
                            TransSubscriberType.ReadOnly);
                    }
                }
                else
                {
                    // Do something here if the publication does not exist.
                    throw new ApplicationException(String.Format(
                        "The publication '{0}' does not exist on {1}.",
                        publicationName, publisherName));
                }
            }
            catch (Exception ex)
            {
                // Implement the appropriate error handling here.
                throw new ApplicationException(String.Format(
                    "The subscription to {0} could not be created.", publicationName), ex);
            }
            finally
            {
                subscriberConn.Disconnect();
                publisherConn.Disconnect();
            }

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

'Create connections to the Publisher and Subscriber.
Dim subscriberConn As ServerConnection = New ServerConnection(subscriberName)
Dim publisherConn As ServerConnection = New ServerConnection(publisherName)

' Create the objects that we need.
Dim publication As TransPublication
Dim subscription As TransPullSubscription

Try
    ' Connect to the Publisher and Subscriber.
    subscriberConn.Connect()
    publisherConn.Connect()

    ' Ensure that the publication exists and that 
    ' it supports pull subscriptions.
    publication = New TransPublication()
    publication.Name = publicationName
    publication.DatabaseName = publicationDbName
    publication.ConnectionContext = publisherConn

    If publication.IsExistingObject Then
        If (publication.Attributes And PublicationAttributes.AllowPull) = 0 Then
            publication.Attributes = publication.Attributes _
            Or PublicationAttributes.AllowPull
        End If

        ' Define the pull subscription.
        subscription = New TransPullSubscription()
        subscription.ConnectionContext = subscriberConn
        subscription.PublisherName = publisherName
        subscription.PublicationName = publicationName
        subscription.PublicationDBName = publicationDbName
        subscription.DatabaseName = subscriptionDbName
        subscription.Description = "Pull subscription to " + publicationDbName _
        + " on " + subscriberName + "."

        ' Specify the Windows login credentials for the Distribution Agent job.
        subscription.SynchronizationAgentProcessSecurity.Login = winLogin
        subscription.SynchronizationAgentProcessSecurity.Password = winPassword

        ' Make sure that the agent job for the subscription is created.
        subscription.CreateSyncAgentByDefault = True

        ' By default, subscriptions to transactional publications are synchronized 
        ' continuously, but in this case we only want to synchronize on demand.
        subscription.AgentSchedule.FrequencyType = ScheduleFrequencyType.OnDemand

        ' Create the pull subscription at the Subscriber.
        subscription.Create()

        Dim registered As Boolean = False

        ' Verify that the subscription is not already registered.
        For Each existing As TransSubscription In publication.EnumSubscriptions()
            If existing.SubscriberName = subscriberName And _
                existing.SubscriptionDBName = subscriptionDbName Then
                registered = True
            End If
        Next existing
        If Not registered Then
            ' Register the subscription with the Publisher.
            publication.MakePullSubscriptionWellKnown( _
             subscriberName, subscriptionDbName, _
             SubscriptionSyncType.Automatic, _
             TransSubscriberType.ReadOnly)
        End If
    Else
        ' Do something here if the publication does not exist.
        Throw New ApplicationException(String.Format( _
         "The publication '{0}' does not exist on {1}.", _
         publicationName, publisherName))
    End If
Catch ex As Exception
    ' Implement the appropriate error handling here.
    Throw New ApplicationException(String.Format( _
        "The subscription to {0} could not be created.", publicationName), ex)
Finally
    subscriberConn.Disconnect()
    publisherConn.Disconnect()
End Try

Thread Safety

Any public static (Shared in Visual Basic) members of this type are thread safe. Any instance members are not guaranteed to be thread safe.

See Also

Reference

Microsoft.SqlServer.Replication Namespace

Other Resources

NIB Create a Pull Subscription (RMO Programming)