Programming continuous merge replication

Hello,
This projects needs to setup automatically a few MSDE subscribers to a main
Distributor/Publisher.
I am using the ActiveX SQL Merge object to set up the merge replication, but
there are 3 problems:
1) There is not a property to set Continuous mode
2) If I set the ExchangeType to upload, when I browse for the properties
using Enterprise Manager, the “ExchangeType 1” is not present in the Agent
step
3) (Project killer) Assume I manage to set Continuous… After running the
SqlMerge object, the status shows “initializing in progress” but it never
finishes and I have to start again the agent from Enterprise Manager… after
selecting Start (from Enterprise Manager) the synchronization runs as
expected… but I cannot start it by program.
Here are the properties and methods that I am calling after everything is
already registered and ready:
//set up the publisher
m_oSqlMerge.Publisher = m_sDistServerName;
m_oSqlMerge.PublisherSecurityMode =
SQLMERGXLib.SECURITY_TYPE.DB_AUTHENTICATION;
m_oSqlMerge.PublisherDatabase = m_sDbName;
m_oSqlMerge.PublisherPassword = m_sDistPassword;
m_oSqlMerge.PublisherLogin = "sa";
m_oSqlMerge.Publication = m_sDbName;
//set up the distributor
m_oSqlMerge.Distributor = m_sDistServerName;
m_oSqlMerge.DistributorSecurityMode =
SQLMERGXLib.SECURITY_TYPE.NT_AUTHENTICATION;
//set up the subscriber
m_oSqlMerge.Subscriber = oSub.ServerName;
m_oSqlMerge.SubscriberDatabase = oSub.DatabaseName;
m_oSqlMerge.SubscriberDatasourceType =
SQLMERGXLib.DATASOURCE_TYPE.SQL_SERVER;
m_oSqlMerge.SubscriberSecurityMode =
SQLMERGXLib.SECURITY_TYPE.DB_AUTHENTICATION;
m_oSqlMerge.SubscriberLogin = "sa";
m_oSqlMerge.SubscriberPassword = sPassword;
//set up the subscription
m_oSqlMerge.SubscriptionType = SQLMERGXLib.SUBSCRIPTION_TYPE.PULL;
m_oSqlMerge.SynchronizationType =
SQLMERGXLib.SYNCHRONIZATION_TYPE.AUTOMATIC;
m_oSqlMerge.ExchangeType = SQLMERGXLib.EXCHANGE_TYPE.UPLOAD;
ProgressValue = 0;
//Initialize
m_oSqlMerge.Initialize();
m_oSqlMerge.Run();
//m_oSqlMerge.Terminate(); //No need to terminate if continuous
When you create a subscription to a merge publication using Enterprise
Manager, a SQL Server Agent job is created that, when run, synchronizes the
subscription. This job is used whenever you synchronize the subscription from
Enterprise Manager. However, when you start the synchronization
programmatically this agent job is not used and the Merge Agent is started
with the properties you set for the object instance. This is why setting
m_oSqlMerge.ExchangeType = SQLMERGXLib.EXCHANGE_TYPE.UPLOAD doesn’t affect
what you see in Enterprise Manager (which is the agent job). There is no
continuous mode for the Merge Agent, however, you can easily use a timer
control or program a method that calls the Run method at regular intervals to
synchronize the subscription. You should do some inserts at the Subscriber
and run the Merge Agent using your code to see if they make it to the
Publisher. Handling the Status event is a good way to get all of the agent
status and messages. For a good example of how to implement the Status event,
see http://www.winnetmag.com/Article/Art...79/39079.html. (Note you
need to be on at least SP3.)
Best Wishes,
Glenn Gailey [MS]
SQL Server User Education
"This posting is provided "AS IS" with no warranties, and confers no rights"
"uk" wrote:

> Hello,
> This projects needs to setup automatically a few MSDE subscribers to a main
> Distributor/Publisher.
> I am using the ActiveX SQL Merge object to set up the merge replication, but
> there are 3 problems:
> 1) There is not a property to set Continuous mode
> 2) If I set the ExchangeType to upload, when I browse for the properties
> using Enterprise Manager, the “ExchangeType 1” is not present in the Agent
> step
> 3) (Project killer) Assume I manage to set Continuous… After running the
> SqlMerge object, the status shows “initializing in progress” but it never
> finishes and I have to start again the agent from Enterprise Manager… after
> selecting Start (from Enterprise Manager) the synchronization runs as
> expected… but I cannot start it by program.
> Here are the properties and methods that I am calling after everything is
> already registered and ready:
> //set up the publisher
> m_oSqlMerge.Publisher = m_sDistServerName;
> m_oSqlMerge.PublisherSecurityMode =
> SQLMERGXLib.SECURITY_TYPE.DB_AUTHENTICATION;
> m_oSqlMerge.PublisherDatabase = m_sDbName;
> m_oSqlMerge.PublisherPassword = m_sDistPassword;
> m_oSqlMerge.PublisherLogin = "sa";
> m_oSqlMerge.Publication = m_sDbName;
> //set up the distributor
> m_oSqlMerge.Distributor = m_sDistServerName;
> m_oSqlMerge.DistributorSecurityMode =
> SQLMERGXLib.SECURITY_TYPE.NT_AUTHENTICATION;
>
> //set up the subscriber
> m_oSqlMerge.Subscriber = oSub.ServerName;
> m_oSqlMerge.SubscriberDatabase = oSub.DatabaseName;
> m_oSqlMerge.SubscriberDatasourceType =
> SQLMERGXLib.DATASOURCE_TYPE.SQL_SERVER;
> m_oSqlMerge.SubscriberSecurityMode =
> SQLMERGXLib.SECURITY_TYPE.DB_AUTHENTICATION;
> m_oSqlMerge.SubscriberLogin = "sa";
> m_oSqlMerge.SubscriberPassword = sPassword;
> //set up the subscription
> m_oSqlMerge.SubscriptionType = SQLMERGXLib.SUBSCRIPTION_TYPE.PULL;
> m_oSqlMerge.SynchronizationType =
> SQLMERGXLib.SYNCHRONIZATION_TYPE.AUTOMATIC;
> m_oSqlMerge.ExchangeType = SQLMERGXLib.EXCHANGE_TYPE.UPLOAD;
> ProgressValue = 0;
> //Initialize
> m_oSqlMerge.Initialize();
> m_oSqlMerge.Run();
> //m_oSqlMerge.Terminate(); //No need to terminate if continuous
>

Programmatically reinitializing merge subscription from publisher - SQL 2005

From the SSMS GUI it is possible to re-initialize one or all subscriptions to a merge publication. This is done at the publisher.

How can I achieve these operations programmatically?

In particular, how do I initialize a single merge subscription from the publisher?

I have looked at the documentation for sp_reinitmergepullsubscription but it says that this proc must be run at the subscriber - which isn't much use when subscribers are disconnected for the majority of the time

I have a large number of merge subscribers and want to reinitialize all except one

aero1

You can use the following statement to re-initiliase your subscribers:

exec sp_reinitmergesubscription @.publication=<Publication Name>, @.subscriber=<Subscriber Name>, @.subscriber_db = <Subscriber DB>, @.upload_first = <TRUE|FALSE>

You can get the details of the subscribers from the sysmergesubscriptions table.

More info on re-intiialising here:

ms-help://MS.SQLCC.v9/MS.SQLSVR.v9.en/tsqlref9/html/249a4048-e885-48e0-a92a-6577f59de751.htm

|||

Just what I needed

Thanks

aero1

Programmatically reinitializing merge subscription from publisher - SQL 2005

From the SSMS GUI it is possible to re-initialize one or all subscriptions to a merge publication. This is done at the publisher.

How can I achieve these operations programmatically?

In particular, how do I initialize a single merge subscription from the publisher?

I have looked at the documentation for sp_reinitmergepullsubscription but it says that this proc must be run at the subscriber - which isn't much use when subscribers are disconnected for the majority of the time

I have a large number of merge subscribers and want to reinitialize all except one

aero1

You can use the following statement to re-initiliase your subscribers:

exec sp_reinitmergesubscription @.publication=<Publication Name>, @.subscriber=<Subscriber Name>, @.subscriber_db = <Subscriber DB>, @.upload_first = <TRUE|FALSE>

You can get the details of the subscribers from the sysmergesubscriptions table.

More info on re-intiialising here:

ms-help://MS.SQLCC.v9/MS.SQLSVR.v9.en/tsqlref9/html/249a4048-e885-48e0-a92a-6577f59de751.htm

|||

Just what I needed

Thanks

aero1