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{ if (ex.Transaction != null) ex.Transaction.Rollback(); } finally { if (cnn != null) cnn.Close(); } } [BrokerMethod("http://ssb.csharp.at/SSB_Book/c05/ResponseMessage")] public void ProcessResponseMessage( Message ReceivedMessage, SqlConnection Connection, SqlTransaction Transaction) { ReceivedMessage.Conversation.End(Connection, Transaction); } [BrokerMethod(Message.EndDialogType)] public void EndConversation( Message ReceivedMessage, SqlConnection Connection, SqlTransaction Transaction) { ReceivedMessage.Conversation.End(Connection, Transaction); } public void ProcessErrorMessage( Message ReceivedMessage, SqlConnection Connection, SqlTransaction Transaction) { ReceivedMessage.Conversation.End(Connection, Transaction); } } As soon as you develop the InitiatorService class, you can deploy the assembly again in your database and activate the internal activation on the InitiatorQueue, as shown in Listing 5-18. Please be sure to point to the correct path where you ve built the assembly.

<StorageBoundInMB>2900</StorageBoundInMB> <MaxColumnsInIndex>1023</MaxColumnsInIndex> <FeatureSet>IDX</FeatureSet> <Partitioning>NONE</Partitioning> <KeepExisting>ALL</KeepExisting> <OnlineIndexOperation>OFF</OnlineIndexOperation> <DatabaseToConnect>[performance]</DatabaseToConnect> </TuningOptions> </DTAInput> </DTAXML> In the preceding output, you can see the XML namespace associated with the root element of the output: DTAXML (Database Engine Tuning Advisor XML). The DTAInput category element is the input XML parent element for Server, Database, Schema, Table, Workload, and TuningOptions. Since multiple databases are being tuned, you can see the list of databases under the Database element tag. For the TuningOptions element, you can see that the TuningTimeInMin element, which specifies the maximum length of tuning time in minutes, is set to 16.

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Listing 5-18. Deployment of the Managed Assembly -- Add the assembly file to the database CREATE ASSEMBLY InitiatorServiceAssembly FROM 'c:\InitiatorService.dll' GO -- Add the debug information to the assembly ALTER ASSEMBLY InitiatorServiceAssembly ADD FILE FROM 'c:\InitiatorService.pdb' GO -- Register the stored procedure written in managed code CREATE PROCEDURE ProcessRequestMessagesManaged AS EXTERNAL NAME InitiatorServiceAssembly.InitiatorService.InitiatorService. ServiceProcedure GO -- Use the managed stored procedure for activation ALTER QUEUE InitiatorQueue WITH ACTIVATION ( STATUS = ON, PROCEDURE_NAME = ProcessResponseMessagesManaged, MAX_QUEUE_READERS = 5, EXECUTE AS SELF ) GO When you register the managed stored procedure for internal activation, you can use the code from Listing 5-8 to send a message to the Service Broker service. In this case, the ProcessRequestMessagesManaged managed stored procedure starts and processes the messages arriving in the TargetQueue. This stored procedure sends a response message back to the InitiatorService, where the ProcessResponseMessages managed stored procedure starts and finally ends the dialog between the two services.

Note The DTA XML input file must conform to the DTAschema.xsd schema. It is located in C:\Program Files\Microsoft SQL Server\100\Tools\Binn\schemas\sqlserver\2004\07\dta\ dtaschema.xsd. For 64-bit systems, this will be located in C:\Program Files(x86)\Microsoft SQL Server\100\Tools\Binn\schemas\sqlserver\2004\07\dta\dtaschema.xsd.

31. Click the chart, and drag the fields from the TerritoryForecast dataset onto the chart, as shown in Figure 5-13.

You can export the results for the definition of a session by double-clicking the session in the DTA, selecting File Export Session Results, and saving it as an XML file. For brevity, I have only included a portion of the output here: < xml version="1.0" encoding="utf-16" > - <DTAXML xmlns:xsi=http://www.w3.org/2001/XMLSchema-instance xmlns="http://schemas.microsoft.com/sqlserver/2004/07/dta"> - <DTAOutput> - <TuningSummary> - <ReportEntry> <Name>Date</Name> <Value>13/02/2009</Value> </ReportEntry> - <ReportEntry> <Name>Time</Name> <Value>11:03:11 PM</Value> </ReportEntry> - <ReportEntry> <Name>Server</Name> <Value>BIOREPL\BIOREPL_TEST</Value> </ReportEntry>

Now that you ve seen how to use managed code to implement Service Broker solutions, let s look at a more complex sample where you ll see how easy it is to implement Service Broker applications with managed code. I ll show you how to implement an inventory application where a client can submit two different types of messages: InventoryUpdate: Updates the inventory in the database. InventoryRequest: Checks if the specified quantity of the inventory is in stock. If it is, the requested quantity is removed from the inventory.

- <ReportEntry> <Name>Database(s) to tune</Name> <Value>[mysales_merge], [mysales_remotedown_merge]</Value> </ReportEntry> - <ReportEntry> <Name>Workload table</Name> <Value>mysales_merge_downloadpubinsert</Value> </ReportEntry> - <ReportEntry> <Name>Maximum tuning time</Name> <Value>16 Minutes</Value> </ReportEntry> - <ReportEntry> <Name>Time taken for tuning</Name> <Value>4 Minutes</Value> </ReportEntry> - <ReportEntry> <Name>Estimated percentage improvement</Name> <Value>0.00</Value> </ReportEntry> - <ReportEntry> <Name>Maximum space for recommendation (MB)</Name> <Value>2900</Value> </ReportEntry> - <ReportEntry> <Name>Space used currently (MB)</Name> <Value>39</Value> </ReportEntry> - <ReportEntry> <Name>Space used by recommendation (MB)</Name> <Value>39</Value> </ReportEntry> - <ReportEntry> <Name>Number of events in workload</Name> <Value>19588</Value> </ReportEntry> - <ReportEntry> <Name>Number of events tuned</Name> <Value>19588</Value> </ReportEntry> </TuningSummary> <Configuration /> <AnalysisReport /> </DTAOutput> </DTAXML

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