Running Custom Business Logic During Synchronization
Oct 30, 2006
I have a merge replication topology that allows some subscribers (clients) to retreive a number for certain columns (ie invoice number, order number, etc).
I have implemented a custom business logic handler to check for inserts from the subscriber and before updating the server, I call a stored proc on the server to generate a new number. I update the data set and call ActionOnDataChange.AcceptCustomData. This works great for the publication db but I am trying to get this new number back into the subscription db. I am using web synchronization so I really don't have a connection back to the subscriber database.
Any Ideas? I was thinking about keeping track of the updates myself and build a sql string and somehow get that back to the subscriber to run updates for those columns... I am wondering if I am pushing the limits of the business logic handler? Was it designed to do this? Of course the easy answer is to modify my client application but I am trying to avoid that at this point.
Any help/suggestions would be greatly appreciated!
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Mar 1, 2007
I am currenly have a simple merge replication topology. The publisher-distibutor is SQL Server 2005 and the subscriber is a SQL Server Express. The type of subscription is non anonymous pull.
I made a custom business logic handler class that is trying the following:
When a new record is inserted in a published table on the pubsliher, some additional records are added in a differenct table in subscriber. Then the "InsertHandler" method returns "AcceptData" in order to allow the agent to add the new record in current table also.
So I am establishing a new connection to the subscriber and I am trying to add the additional recs in the different table. The problem is that this different table is also published as read-only on the subscriber. So my insert fails saying that table is not updatable.
Is there any way to bypass this problem?
In fact I realised in general that when my custom logic handler performs some DML operations on the subscriber, these are NOT considered as part of the replication e.g. the NOT FOR REPLICATION constraints and triggers are active for these operations.
Is this normal?
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Jun 10, 2006
Can anyone take me through synchronization of contacts within Business Contacts Outlook into Microsoft Small Business Accounts?
I run a stand alone PC with NO network. When SBA came SQL was also installed. Apparently you can synchronise Contacts within Business Contacts with SBA but both SBA & Outlook should work through the same SQL server.
Has anyone tried this?
Can someone walk me through the process?
Thanks
Debbie
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Feb 26, 2008
Or maybe it can't find something it's looking for to make my additional symetrical with everything else. This is from one of my businesslogic files. What causes Visual Studio to not allow me to add something here and have it behave like the other parameters/ I'm talking about ShortDesc. Visual studio inserted () and the Get instead of GET like all the others. It would not allow me to capitalize the "get". There has to be a reason for this. Currently my program is adding all of the fields except the ShortDesc to the table in my database. Does anyone have any thoughts as to why this is the case?
#Region "Pvt Members" Private _ArticleID As System.Int32 Private _UserID As System.Int32 Private _WebSiteID As System.Int32 Private _ArticleTitle As System.String Private _Author As System.String Private _ShortDesc As System.String Private _ArticleText As System.String Private _AnchorText As System.String Private _ShowInDirectory As System.Boolean Private _Active As System.Boolean Private _DateAdded As System.DateTime#End Region#Region "Properties" Public Property ArticleID As System.Int32 GET Return _ArticleID End Get Set(ByVal Value As System.Int32) _ArticleID= Value End Set End Property Public Property UserID As System.Int32 GET Return _UserID End Get Set(ByVal Value As System.Int32) _UserID= Value End Set End Property Public Property WebSiteID As System.Int32 GET Return _WebSiteID End Get Set(ByVal Value As System.Int32) _WebSiteID= Value End Set End Property Public Property ArticleTitle As System.String GET Return _ArticleTitle End Get Set(ByVal Value As System.String) _ArticleTitle= Value End Set End Property Public Property Author As System.String GET Return _Author End Get Set(ByVal Value As System.String) _Author= Value End Set End Property Public Property ShortDesc() As System.String Get Return _ShortDesc End Get Set(ByVal value As System.String) End Set End Property Public Property ArticleText As System.String GET Return _ArticleText End Get Set(ByVal Value As System.String) _ArticleText= Value End Set End Property Public Property AnchorText As System.String GET Return _AnchorText End Get Set(ByVal Value As System.String) _AnchorText= Value End Set End Property Public Property ShowInDirectory As System.Boolean GET Return _ShowInDirectory End Get Set(ByVal Value As System.Boolean) _ShowInDirectory= Value End Set End Property Public Property Active As System.Boolean GET Return _Active End Get Set(ByVal Value As System.Boolean) _Active= Value End Set End Property Public Property DateAdded As System.DateTime GET Return _DateAdded End Get Set(ByVal Value As System.DateTime) _DateAdded= Value End Set End Property #End Region
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Apr 5, 2006
Hey guys,I have to import a csv file to my database and then add
some values to other fields based on these values. At present I use a
store procedure that does a bulk insert and then I use an update and
fetch inside the sql to perform these updates. I am not sure if this is
the best way. Is this bad, since some amount of busniess logic is in
the store procedure?If it is, how can I do this better?Thanks for the answer.
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Nov 7, 2006
I'm trying to implement a custom conflict resolver by inheriting from
Microsoft.SqlServer.Replication.BusinessLogicSupport.BusinessLogicModule. The replication is between a SQL Server 2005 Express subscriber and a SQL Server 2005 publisher/distributer.
The problem is that the resolver class in the DLL will not load; although, it does appear to find the DLL. (If I rename the DLL I get a "file not found error"). The exact error message is:
Microsoft.SqlServer.Replication.ComErrorException
"Error loading custom class "MergeConflictHandler" from custom assembly "MergeConflictHandler",
Error : "Could not load type 'MergeConflictHandler' from assembly 'MergeConflictHandler, Version=1.0.2502.22393, Culture=neutral, PublicKeyToken=0403e50cc4dc27fa'."."}
I placed the DLL in the directory of the program that calls SynchronizationAgent.Synchronize and tried it with and without being registered in the GAC. There was no change. Interestingly, when I move the file out of that location, but register it in the GAC, the file is not found. Thinking it may be a security problem, I gave Everyone Read & Execute and Read privileges. I believe the class is actually instantiated by replmerge.exe, an apparantly unmanaged app, so I tried marking it ComVisible. No Luck.
I registered the resolver with the following T-SQL code:
sp_registercustomresolver @article_resolver = 'eClinical Notes Conflict Resolver'
, @is_dotnet_assembly = 'true'
, @dotnet_assembly_name = 'MergeConflictHandler'
, @dotnet_class_name = 'MergeConflictHandler'
, @resolver_clsid = Null
The resolver I've created is not much more than a shell at this point. It is pasted below, but I tried using the code found on MSDN character-for-character and had the same problem.
using System;
using System.Text;
using System.Data;
using System.Data.Common;
using Microsoft.SqlServer.Replication.BusinessLogicSupport;
namespace MergeConflictHandler
{
public class MergeConflictHandler :
Microsoft.SqlServer.Replication.BusinessLogicSupport.BusinessLogicModule
{
// Variables to hold server names.
private string m_PublisherName;
private string m_SubscriberName;
private string m_Artical_Name;
public MergeConflictHandler()
{
}
// Implement the Initialize method to get publication
// and subscription information.
public override void Initialize(string publisher, string subscriber, string distributor, string publisherDB, string subscriberDB,string articleName)
{
m_PublisherName = publisher;
m_SubscriberName = subscriber;
m_Artical_Name = articleName;
}
// Declare what types of row changes, conflicts, or errors to handle.
public override ChangeStates HandledChangeStates
{
get
{
return ChangeStates.UpdateConflicts;
}
}
public override ActionOnUpdateConflict UpdateConflictsHandler(DataSet publisherDataSet, DataSet subscriberDataSet, ref DataSet customDataSet, ref ConflictLogType conflictLogType, ref string customConflictMessage, ref int historyLogLevel, ref string historyLogMessage)
{
if (m_Artical_Name == "PatientAllergies")
{
// Accept the updated data in the Subscriber's data set and apply it to the Publisher.
}
return ActionOnUpdateConflict.AcceptPublisherData;
}
}
}
Does anyone have any thoughts or advice? (Help!)
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Jul 10, 2006
hi,
i'm following steps described at: http://msdn2.microsoft.com/en-us/library/ms365150.aspx
all goes fine until step 6. of paragraph "To debug a business logic handler on a Web server using Web synchronization, or for a SQL Server Mobile Subscriber".
in my case when attaching to w3wp.exe i can only debug t-sql or native code. when i forcibly check 'managed' i get: "Unable to attach to the process. Access is denied". error picture:
http://img156.imageshack.us/my.php?image=debuggingerror7bp.jpg
i KNOW that the business logic handler gets loaded and executed because i am logging some info in it. i would be grateful for any suggestions.
TIA, kamil nowicki
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May 21, 2008
I am working with stored procedures to provide conditional business logic for a customer based on triggers. Is it possible for a stored procedure to execute an external program ie opening or distributing a crystal report?
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Oct 25, 2007
Hi,
I am performing the Merge Replication of Timesheet table between SQL server 2005 and SQL CE on the Pocket PC. For one of the article, I would like to perform web synch for only those rows which have certain field set to true.
I am trying to use Business Logic Handler to implement this logic. I am using following code out of sample on MSDN web site. However I am not sure if this code gets executed for each row for a table during synch or does this get executed once for each table? The answer would help me write logic on applying synch changes only for few rows.
Thanks
public override ActionOnDataChange UpdateHandler(SourceIdentifier updateSource,
DataSet updatedDataSet, ref DataSet customDataSet, ref int historyLogLevel,
ref string historyLogMessage)
{
if (updateSource == SourceIdentifier.SourceIsPublisher)
{
//check the approved status of the timesheet
if (updatedDataSet.Tables["tbl_timesheets"].Rows[0]["ts_approved"] == true)
{
// Set the reference parameter to write the line to the log file.
historyLogMessage = updatedDataSet.Tables["tbl_timesheets"].Rows[0]["ts_id"].ToString();
// Set the history log level to the default verbose level.
historyLogLevel = 1;
// Accept the updated data in the Subscriber's data set and apply it to the Publisher.
return ActionOnDataChange.AcceptData;
}
else
{
return ActionOnDataChange.RejectData;
}
}
else
{
return base.UpdateHandler(updateSource, updatedDataSet,
ref customDataSet, ref historyLogLevel, ref historyLogMessage);
}
}
Any Help is appreciated.
Thanks
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Mar 16, 2007
I guess I just don't get the reasoning behind the new SqlDataSource control. Haven't we just spent the last decade or so evangelizing and learning how and why to separate business logic from the display in VB 6 and VS.NET? In this age of programming for disparate devices (desktop, mobile, PocketPC, etc.) when this separation makes more sense than ever, why is MS pushing us to go back to putting our logic and data access rules and objects back in the display? It doesn't make sense. Why would anyone do this? And why would all the experts and MVPs at ASP.NET, DevX, 4GuysFromRolla, etc., go along with this?
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May 17, 2007
When running a business logic handler at the subscriber, you can override SubscriberInserts, SubscriberUpdates and SubscriberDeletes. Are these methods called when data is changed coming from the server to client, from the client to the server, or in both directions?
Thanks,
Bryan
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May 27, 2015
ALTER TABLE [dbo].[bkrm_lendcoll] ADD CONSTRAINT
   ReqdCovgAmt_constraint33 CHECK   Â
( caseÂ
 when CovgAmt = 0 and  ReqdCovgAmt = 0 then 1
 when CovgAmt = 0 and  ReqdCovgAmt = 1 then 1
 when CovgAmt = 1 and  ReqdCovgAmt = 0 then 1
 when CovgAmt = 1 and  ReqdCovgAmt = 1 then 0
end =1
)
This is my first attempt to add a constraint for business logic. Â The desired behavior is that the two columns together have the same behavior as a radio button. Â (one can be true, the other true, both can be false, but both cannot be true.) I get this error when I attempt to update it.
The ALTER TABLE statement conflicted with the CHECK constraint "ReqdCovgAmt_constraint33". The conflict occurred in database "Std", table "dbo.lendcoll".
So, basically my question is, when you have two bit columns and want them to have the truth table such as described, how can I set a Check constraint to enforce this?
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Oct 25, 2007
Hi,
I have 2 related tables in SQL 2005. I am using Business Logic Handler on one of those tables during Merge Replication to reject data for few rows during web synchronization. Once a row is rejected, I would like to run the Business Logic Handler for the related table to reject changes for the row with same foreign key as the rejected row in first table.
Not sure if I need to create separate Business Logic Handlers for each table or can it be achieved in a single Handler.
Also is it possible to get a list of rejected rows back from the handler?
Thanks for help.
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Jul 20, 2005
Hello,I stuck in a delimma.Where to put the business logic that involves only one updatebut N number of selects from N tables........with N where conditions
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Nov 17, 2006
I have got a business logic update conflict handler working, but I have had to work round what appears to be a bug.
Please can someone confirm if this is indeed a bug €“ and if it is a known bug?
My conflict handler needs to take some columns from the publisher row and some from the subscriber row in the event of conflict.
I can quite happily generate a custom dataset which contains the winning row that I want €“ I can see that because I can step through the conflict handler with debug when a conflict occurs.
However, just returning ActionOnUpdateConflict.AcceptCustomConflictData from the UpdateConflictsHandler method does not set the publisher and subscriber columns correctly. I end up with different values on the two databases.
I have found that the only way to get the correct rows on both publisher and subscriber is to create a new ADO connection to the publisher and actually perform an update €“ updating all the modified columns. This now works reliably in my testing.
Fortunately, due to business rules the frequency of update conflicts are likely to be very infrequent, but I would very much like to avoid having to do the €˜unnecessary€™ update.
Notes:
I am using column level tracking €“ but I have seen the problem with row level tracking too
I have mainly been using SP1 but have repeated the test on a configuration using the SP2 CTP €“ and the problem occurs there too
The problem is not due to complex logic in my code. If the method just sets customDataSet = publisherDataSet.Copy and then returns ActionOnUpdateConflict.AcceptCustomConflictData, the changed and winning publisher values are not sent to the subscriber
Any thoughts would be much appreciated
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Jul 20, 2005
What is the way we could implement a business logic from a Table bystoring it statemnnets in a colums and defining an execute sql toexecute it.Some legal requirements make it diffcult for us to createmodify stored procdures so Iwant to have a process where we create newrows in a table and execute it to execute business logic.All views are welcome.Havin g one table two tables different approaches to store ststementsand execute them....Case logic how to implement it?Flags in the tble colums in the tablesetcThanksAjay Garg
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Jul 23, 2007
Pocket PC 2003, SQL Compact Edition, SQL2005, IIS6.0
I implemented a business logic handler to deal with conflicts. When I deploy it on the SQL server which is also the web replication server, the logic handler seems working fine. However, if I deploy this handler to another web server. The logic handler failed to be loaded.
My enviroment settings are desribed as below.
Machine A, distributor, with database and publication. The business logic handler is deployed at C:Program FilesMicrosoft SQL Server90COMBusinessLogicHandler.dll. It's registered by using sp_registercustomresolver. The @assembly is specified as @assembly=C:Program FilesMicrosoft SQL Server90COMBusinessLogicHandler.dll';
Machine B, IIS server. The same business logic handler is deployed at C:Program FilesMicrosoft SQL Server90COMBusinessLogicHandler.dll on the Machine B itself.
When I ran the web replication, the Merge Agent reported the error as below.
Error loading custom assembly "C:Program FilesMicrosoft SQL Server90COMBusinessLogicHandler.dll", Error: "Could not load file or assembly 'C:\Program Files\Microsoft SQL Server\90\COM\BusinessLogicHandler.dll' or one of its dependencies. The given assembly name or codebase was invalid.
It seemed that the Merge Agent had trouble to find my logic handler because the path reported in the error log has two backward slashes. I have no idea where did that came from. I am not sure if that's the cause of the error. Without business logic handler. I had successfully finished web replication of Machine B to sync with Machine A. If I setup web replication directly on Machine A with business logic handler, I can successfully sync as well.
Does anyone has any idea about how to correctly deploy business logic handler on a web server?
Thanks,
Nigel
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Apr 21, 2015
I am currently working with C and SQL Server 2012. My requirement is to Bulk fetch the records and Insert/Update the same in the other table with some business logic? How do i do this?
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Jun 17, 2008
I went to View Synchronization status and see that the sychronization has been running for two hours already. Is that normal? I thought it would just find the one change I made and update that one change?
Thanks in advance!
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Jul 10, 2007
Hi, there;
We have device using sqlce2.0 and replicate data with sql2000.
Now we have new WM5 device which uses SqlCe3.0. So I need to install connectivity tools
using "SqlCe30setupen.msi".
I got error when I run "Configure Web Synchronization Wizard": The operation completed successfully. (Exception from HRESULT: 0x80070000) (mscorlib).
When I run this wizard, I logged in the server as "Administrator" and point to the existing snapshot folder which is used by sqlce2.0.
Can anybody advise what cause the problem? Can I install it in the same virtual directory as the current one where the sqlce2.0 sits in?
Big thanks here.
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Apr 19, 2007
Hello,
We have an environment with 7 servers that are running replication with one another and I'm wondering if there are any tools or experiences that any of you might have that may assist in the auditing of these servers. The data should be in synch accross the boards for all tables, but sometimes problems can arise such as replication not being set up properly, stored procedure's being out of synch, or data gliches etc.
In dealing with these issues we have an in-house written program which analises each table on each server and takes a snapshot and does column by column compare. We also have another program that will synch the data up (basically a delete/insert statement on the publisher). This process can take up to 3 weeks for our quarterly update of every table. I'm wondering if anybody has used any tools such as in SSIS or a third party tool and has done or is doing something similar to what we are doing now. If so, are there any tips you wouldn't mind sharing on how our process might be sped up?
Thanks,
Phil
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Jan 5, 2007
Hi
We have SQL Express running very slowly on Small Business Server. Does
anyone know if there is a conflict between the two? Or any ideas on how
to solve our problem?
(Autoclose is set to
false)
Thanks
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Apr 25, 2007
Hi , all Microsoft BI experts here,
Thanks for your kind attention.
I am having a question as stated in the subject title, yes, when we want to deploy scorecards to reporting services, as the prerequisite, how can we install and register the scorecard custom data processing extension with the Microsoft reporting services server?
I am looking forward to hearing from you shortly and thank you again.
With best regards,
Yours sincerely,
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Aug 6, 2015
I have a balance sheet report developed and working. What I need to do is add the ability to click (or double-click) on a number and have a separate report (drill-down) open with the detail that makes up that number. I've researched drill-through reports, sub reports, etc. but can't find a way to do what I want.
I'm now thinking that I need to add custom code in the report properties, code window to do this. I'm hoping that there is a VB method I can use to call this report and pass a parameter. Pseudo-code for this function would look something like this: RunReport("DrillDownReport", "Parameter").
This seems like it should be pretty easy but I don't know what the function is in VB for running an SSRS report (if there is one).
Is this possible or am I barking up the wrong code tree?
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Nov 5, 2007
I'm trying to configure SQL server 2000 (standard edition) to send e-mail on a Small Business Server 2003. There's a great article on how to do this on a SBS 2000 server (KB304967), but it does not apply to SBS 2003. Can anyone point me to a article or white paper on how to configure SQL on a SBS 2003 server to send e-mail. Thanks.
David Neahusan
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Oct 23, 2007
Does anyone have a successful prescribed sequence for installing VS2005 and Business Intelligence Reports Projects on a Vista Business workstation to be used to create reports for a server?
I've looked through everything I can find here and I don't seem to see a clear solution without a lot of trial and error.
Fact is, I've not been successful getting just the reports to install on a plain XP box. Of course, the report creation looks fine on the server but I don't want to work directly on the server.
Thank you
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Sep 6, 2006
Hello everybody,
There is some strange behaviour i've recently noticed while watching synchronization progress in Replication Monitor on SQL 2005 Server Standard with merge replication configured. The merge process seems to repeat several times.
This is the initial synchronizaion (reinitalization at the subsciber). Client is using Microsoft.SQLServer.Replication objects from .net framework assemblies.
The synchronization starts normally (status is "Running"). The last message of selected session box shows (among other messages): "Beginning evaluating partial replication filters" then "Finished evaluating partial replication filters" and finally "Merge completed after processing xxx changes... etc." after a few seconds. Status changes to "Completed" and then... the merge process starts again!! "Beginning evaluating partial replication filters" etc. And this repeats about 15-20 times.
And so whole process takes about 15 minutes instead about 45 seconds to complete initial synchronization. The number of changes is "Merge completed after processing ..." never change since the first such message.
Is this some bug in web synchronization or some invalid configuration setting? Why does merge process repeat itself so many times??
Please help, thanks in advance.
Kuba
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Mar 8, 2007
Hi,
I am creating a custom transformation component, and a custom user interface for that component.
In
my custom UI, I want to show the custom properties, and allow users to
edit these properties similar to how the advanced editor shows the
properties.
I know in my UI I need to create a "Property Grid".
In
the properties of this grid, I can select the object I want to display
data for, however, the only objects that appear are the objects that I
have already created within this UI, and not the actual component
object with the custom properties.
How do I go about getting the properties for my transformation component listed in this property grid?
I am writing in C#.
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Aug 14, 2007
Hi,
I've created a Custom Data Flow Component and added some Custom Properties.
I want the user to set the contents using an expression. I did some research and come up with the folowing:
Code Snippet
IDTSCustomProperty90 SourceTableProperty = ComponentMetaData.CustomPropertyCollection.New();
SourceTableProperty.ExpressionType = DTSCustomPropertyExpressionType.CPET_NOTIFY;
SourceTableProperty.Name = "SourceTable";
But it doesn't work, if I enter @[System:ackageName] in the field. It comes out "@[System:ackageName]" instead of the actual package name.
I'm also unable to find how I can tell the designer to show the Expression editor. I would like to see the elipses (...) next to my field.
Any help would be greatly appreciated!
Thank you
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Apr 2, 2007
Hi,
I'm trying to enable Expression for a custom property in my custom data flow component.
Here is the code I wrote to declare the custom property:
public override void ProvideComponentProperties()
{
ComponentMetaData.RuntimeConnectionCollection.RemoveAll();
RemoveAllInputsOutputsAndCustomProperties();
IDTSCustomProperty90 prop = ComponentMetaData.CustomPropertyCollection.New();
prop.Name = "MyProperty";
prop.Description = "My property description";
prop.Value = string.Empty;
prop.ExpressionType = DTSCustomPropertyExpressionType.CPET_NOTIFY;
...
}
In design mode, I can assign an expression to my custom property, but it get evaluated in design mode and not in runtime
Here is my expression (a file name based on a date contained in a user variable):
"DB" + (DT_WSTR, 4)YEAR( @[User::varCurrentDate] ) + RIGHT( "0" + (DT_WSTR, 2)MONTH( @[User::varCurrentDate] ), 2 ) + "\" + (DT_WSTR, 4)YEAR( @[User::varCurrentDate] ) + RIGHT( "0" + (DT_WSTR, 2)MONTH( @[User::varCurrentDate] ), 2 ) + ".VER"
@[User::varCurrentDate] is a DateTime variable and is assign to 0 at design time
So the expression is evaluated as: "DB189912189912.VER".
My package contains 2 data flow.
At runtime,
The first one is responsible to set a valid date in @[User::varCurrentDate] variable. (the date is 2007-01-15)
The second one contains my custom data flow component with my custom property that was set to an expression at design time
When my component get executed, my custom property value is still "DB189912189912.VER" and I expected "DB200701200701.VER"
Any idea ?
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Aug 17, 2005
What I want to accomplish is that at design time the designer can enter a value for some custom property on my custom task and that this value is accessed at executing time.
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Aug 16, 2006
I am writing a custom task that has some custom properties. I would like to parameterize these properties i.e. read from a varaible, so I can change these variables from a config file during runtime.
I read the documentation and it says if we set the ExpressionType to CPET_NOTIFY, it should work, but it does not seem to work. Not sure if I am missing anything. Can someone please help me?
This is what I did in the custom task
customProperty.ExpressionType = DTSCustomPropertyExpressionType.CPET_NOTIFY;
In the Editor of my custom task, under custom properties section, I expected a button with 3 dots, to click & pop-up so we can specify the expression or at least so it evaluates the variables if we give @[User::VaraibleName]
Any help on this will be very much appreciated.
Thanks
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