ReplicationDatabase.LogReaderAgentExists Property

Reference

Definition

Namespace:: Microsoft.SqlServer.Replication

Assembly:: Microsoft.SqlServer.Rmo.dll

Important

Some information relates to prerelease product that may be substantially modified before it’s released. Microsoft makes no warranties, express or implied, with respect to the information provided here.

Gets whether or not the Log Reader Agent has been created for the publication database.

public:
 property bool LogReaderAgentExists { bool get(); };

public bool LogReaderAgentExists { get; }

member this.LogReaderAgentExists : bool

Public ReadOnly Property LogReaderAgentExists As Boolean

Property Value

Boolean

A Boolean value that specifies whether or not the Log Reader Agent for the publication database has been created. If true, the Log Reader Agent exists. If false, the Log Reader Agent has not yet been created.

Exceptions

ApplicationException

When the database does not exist on the server.

When the Log Reader Agent has not been upgraded to the SQL Server 2005 replication agent security model. For more information, see Security and Protection (Replication).

Examples

// Set the Publisher, publication database, and publication names.
string publicationName = "AdvWorksProductTran";
string publicationDbName = "AdventureWorks2012";
string publisherName = publisherInstance;

ReplicationDatabase publicationDb;
TransPublication publication;

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


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

    // Enable the AdventureWorks2012 database for transactional publishing.
    publicationDb = new ReplicationDatabase(publicationDbName, conn);

    // If the database exists and is not already enabled, 
    // enable it for transactional publishing.
    if (publicationDb.LoadProperties())
    {
        if (!publicationDb.EnabledTransPublishing)
        {
            publicationDb.EnabledTransPublishing = true;
        }

        // If the Log Reader Agent does not exist, create it.
        if (!publicationDb.LogReaderAgentExists)
        {
            // Specify the Windows account under which the agent job runs.
            // This account will be used for the local connection to the 
            // Distributor and all agent connections that use Windows Authentication.
            publicationDb.LogReaderAgentProcessSecurity.Login = winLogin;
            publicationDb.LogReaderAgentProcessSecurity.Password = winPassword;

            // Explicitly set authentication mode for the Publisher connection
            // to the default value of Windows Authentication.
            publicationDb.LogReaderAgentPublisherSecurity.WindowsAuthentication = true;

            // Create the Log Reader Agent job.
            publicationDb.CreateLogReaderAgent();
        }
    }
    else
    {
        throw new ApplicationException(String.Format(
            "The {0} database does not exist at {1}.",
            publicationDb, publisherName));
    }

    // Set the required properties for the transactional publication.
    publication = new TransPublication();
    publication.ConnectionContext = conn;
    publication.Name = publicationName;
    publication.DatabaseName = publicationDbName;

    // Specify a transactional publication (the default).
    publication.Type = PublicationType.Transactional;

    // Activate the publication so that we can add subscriptions.
    publication.Status = State.Active;

    // Enable push and pull subscriptions and independent Distribition Agents.
    publication.Attributes |= PublicationAttributes.AllowPull;
    publication.Attributes |= PublicationAttributes.AllowPush;
    publication.Attributes |= PublicationAttributes.IndependentAgent;

    // Specify the Windows account under which the Snapshot Agent job runs.
    // This account will be used for the local connection to the 
    // Distributor and all agent connections that use Windows Authentication.
    publication.SnapshotGenerationAgentProcessSecurity.Login = winLogin;
    publication.SnapshotGenerationAgentProcessSecurity.Password = winPassword;

    // Explicitly set the security mode for the Publisher connection
    // Windows Authentication (the default).
    publication.SnapshotGenerationAgentPublisherSecurity.WindowsAuthentication = true;

    if (!publication.IsExistingObject)
    {
        // Create the transactional publication.
        publication.Create();

        // Create a Snapshot Agent job for the publication.
        publication.CreateSnapshotAgent();
    }
    else
    {
        throw new ApplicationException(String.Format(
            "The {0} publication already exists.", publicationName));
    }
}

catch (Exception ex)
{
    // Implement custom application error handling here.
    throw new ApplicationException(String.Format(
        "The publication {0} could not be created.", publicationName), ex);
}
finally
{
    conn.Disconnect();
}

' Set the Publisher, publication database, and publication names.
Dim publicationName As String = "AdvWorksProductTran"
Dim publicationDbName As String = "AdventureWorks2012"
Dim publisherName As String = publisherInstance

Dim publicationDb As ReplicationDatabase
Dim publication As TransPublication

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

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

    ' Enable the AdventureWorks2012 database for transactional publishing.
    publicationDb = New ReplicationDatabase(publicationDbName, conn)

    ' If the database exists and is not already enabled, 
    ' enable it for transactional publishing.
    If publicationDb.LoadProperties() Then
        If Not publicationDb.EnabledTransPublishing Then
            publicationDb.EnabledTransPublishing = True
        End If

        ' If the Log Reader Agent does not exist, create it.
        If Not publicationDb.LogReaderAgentExists Then
            ' Specify the Windows account under which the agent job runs.
            ' This account will be used for the local connection to the 
            ' Distributor and all agent connections that use Windows Authentication.
            publicationDb.LogReaderAgentProcessSecurity.Login = winLogin
            publicationDb.LogReaderAgentProcessSecurity.Password = winPassword

            ' Explicitly set authentication mode for the Publisher connection
            ' to the default value of Windows Authentication.
            publicationDb.LogReaderAgentPublisherSecurity.WindowsAuthentication = True

            ' Create the Log Reader Agent job.
            publicationDb.CreateLogReaderAgent()
        End If
    Else
        Throw New ApplicationException(String.Format( _
         "The {0} database does not exist at {1}.", _
         publicationDb, publisherName))
    End If

    ' Set the required properties for the transactional publication.
    publication = New TransPublication()
    publication.ConnectionContext = conn
    publication.Name = publicationName
    publication.DatabaseName = publicationDbName

    ' Specify a transactional publication (the default).
    publication.Type = PublicationType.Transactional

    'Enable push and pull subscriptions and independent Distribition Agents.
    publication.Attributes = _
    publication.Attributes Or PublicationAttributes.AllowPull
    publication.Attributes = _
    publication.Attributes Or PublicationAttributes.AllowPush
    publication.Attributes = _
    publication.Attributes Or PublicationAttributes.IndependentAgent

    ' Activate the publication so that we can add subscriptions.
    publication.Status = State.Active

    ' Specify the Windows account under which the Snapshot Agent job runs.
    ' This account will be used for the local connection to the 
    ' Distributor and all agent connections that use Windows Authentication.
    publication.SnapshotGenerationAgentProcessSecurity.Login = winLogin
    publication.SnapshotGenerationAgentProcessSecurity.Password = winPassword

    ' Explicitly set the security mode for the Publisher connection
    ' Windows Authentication (the default).
    publication.SnapshotGenerationAgentPublisherSecurity.WindowsAuthentication = True

    If Not publication.IsExistingObject Then
        ' Create the transactional publication.
        publication.Create()

        ' Create a Snapshot Agent job for the publication.
        publication.CreateSnapshotAgent()
    Else
        Throw New ApplicationException(String.Format( _
            "The {0} publication already exists.", publicationName))
    End If
Catch ex As Exception
    ' Implement custom application error handling here.
    Throw New ApplicationException(String.Format( _
        "The publication {0} could not be created.", publicationName), ex)
Finally
    conn.Disconnect()
End Try

Remarks

The LogReaderAgentExists property can be retrieved by members of the sysadmin fixed server role and by members of the db_owner fixed database role of the publication database.

Calling LogReaderAgentExists is equivalent to executing the sp_helplogreader_agent (Transact-SQL) stored procedure.

Applies to

共用方式為