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With this Service Broker infrastructure, you can now create the managed stored procedure that processes the incoming messages on the InventoryTargetService. The entry point for this managed stored procedure is the same code as in Listings 5-11 and 5-12. The first use case for this example is the requirement to update the inventory. To accomplish this task, a client sends a message of the type [http://ssb.csharp.at/SSB_Book/c05/ InventoryUpdateMessage] bound to the Service Broker contract [http://ssb.csharp.at/ SSB_Book/c05/InventoryUpdateContract]. Listing 5-21 shows the ProcessInventoryUpdate method that processes this message type. Listing 5-21. Updating the Inventory Table [BrokerMethod("http://ssb.csharp.at/SSB_Book/c05/InventoryUpdateMessage")] public void ProcessInventoryUpdate( Message ReceivedMessage, SqlConnection Connection, SqlTransaction Transaction) { try { XmlDocument doc = new XmlDocument(); doc.LoadXml(ReceivedMessage.BodyAsString); XmlNodeList list = doc.GetElementsByTagName("InventoryId"); string inventoryId = list.Items(0).InnerXml; list = doc.GetElementsByTagName("Quantity"); int quantity = Convert.ToInt32(list.Items(0).InnerXml); // Updating the inventory UpdateInventory(Connection, Transaction, inventoryId, quantity); // End the conversation between the two services ReceivedMessage.Conversation.End(Connection, Transaction); } catch (Exception ex) { ReceivedMessage.Conversation.EndWithError( 1, ex.Message, Connection, Transaction); } } private void UpdateInventory( SqlConnection Connection, SqlTransaction Transaction, string InventoryId, int Quantity)

<FeatureSet>IDX</FeatureSet> <Partitioning>NONE</Partitioning> <KeepExisting>ALL</KeepExisting> <OnlineIndexOperation>OFF</OnlineIndexOperation> <DatabaseToConnect>[performance]</DatabaseToConnect> </TuningOptions> <! --The configuration options --> <Configuration SpecificationMode="Absolute"> <Server> <Name>BIOREPL\BIOREPL_TEST</Name> <Database> <Name>mysales_merge</Name> <Schema> <Name>myinventory</Name> <Table> <Name>Item</Name> <Recommendation> <Create> <Index Clustered="true" Unique="false" Online="false" IndexSizeInMB="873.75"> <Name>PK_Item</Name> </Index> </Create> </Recommendation> </Table> </Schema> </Database> </Server> </Configuration> </DTAInput> </DTAXML> The Configuration element contains an attribute called SpecificationMode. This attribute can have a value of either Absolute or Relative. When set to Absolute, as in this case, it means that the DTA will not consider the existing configuration and will evaluate it as a stand-alone configuration. However, if it were set to Relative, the DTA would analyze the specified configuration with the current one. The names of the server, database, schema, table, and any recommendations that you want to configure are also specified. The Recommendation element contains a Create child element. Note, in this case, that the Recommendation element is meant for the hypothetical configuration. If the XML file is not validated against dtaschema.xsd, you will get an error message. Consider the scenario where you have the following code:

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{ // Creating the SqlCommand SqlCommand cmd = new SqlCommand("UPDATE Inventory " + "SET Quantity = Quantity + @Quantity " + "WHERE InventoryId = @InventoryId", Connection); cmd.Transaction = Transaction;

<Configuration SpecificationMode="Absolute"> <Server> <Name>BIOREPL\BIOREPL</Name> <Database>mysales_merge</Database> Notice that the Name child element for the Database parent element is missing. Suppose you tried to execute the preceding code from the command prompt as follows: Dta -E -S BIOREPL\BIOREPL_TEST -s mysales_exploratory -ix C:\publishing\optimization\mysales_mergedownload_tuning1_perfunct.xml In this command, -E is the user trusted connection, -S is the server name, -s is the session name, and -ix is the input XML file name. The result of this command will show a schema validation error for the Database element. In fact, it actually tells you that you need to incorporate the Name child element for the Database parent element. If you look at Listing 19-4, you can see that each of the input elements have a child element called Name, where you can specify text like that of the Item table. The dta utility needs to be run from the command prompt.

37. Right-click the legend, and enable Show Legend Title. Rename the title to Stage. 38. Rename the x axis title to Territory in bold. 39. Rename the y axis title to Est. Rev. (in 1,000s) in bold. 40. Right-click the x axis value, and go to Axis Properties. Change the Minor Tick Marks values to match Figure 5-14.

You can then use the following command to execute the script in Listing 19-4: Dta -E -S BIOREPL\BIOREPL_TEST -s mysales_exploratory -ix C:\publishing\optimization\mysales_mergedownload_tuning1_perfunct.xml -ox C:\publishing\optimization\mysales_exploratory.xml You now know how to use the DTA both as a GUI and a command-line tool. In the following sections, I will focus on the retention of publications, and the profiles and parameters of the Merge Agent that have an impact on performance.

// Add InventoryId parameter SqlParameter paramInventoryId = new SqlParameter("@InventoryId", SqlDbType.NVarChar, 10); paramInventoryId.Value = InventoryId; cmd.Parameters.Add(paramInventory); // Add Quantity parameter SqlParameter paramQuantity = new SqlParameter("@Quantity", SqlDbType.Int); paramQuantity.Value = Quantity; cmd.Parameters.Add(paramQuantity); // Execute the SqlCommand cmd.ExecuteNonQuery(); } Once you write the necessary methods in the managed stored procedure, you must deploy the stored procedure to the database. You do this through the CREATE ASSEMBLY T-SQL statement already described in Listing 5-13 and Table 5-5. Listing 5-22 shows the needed T-SQL. Listing 5-22. Registering the Managed Stored Procedure CREATE ASSEMBLY [InventoryTargetServiceAssembly] FROM 'c:\InventoryTargetService.dll' GO ALTER ASSEMBLY [InventoryTargetServiceAssembly] ADD FILE FROM 'c:\InventoryTargetService.pdb' GO CREATE PROCEDURE InventoryTargetProcedure AS EXTERNAL NAME [InventoryTargetServiceAssembly]. [InventoryTargetService.TargetService]. ServiceProcedure GO

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