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You have now seen the three steps performed by the Snapshot Agent, but suppose you want to add or insert a step in the job. You can indeed add or move the steps depending on your business rules. Perhaps you want to add the name of the user who needs to view the pub_mysalesnew publication at a remote site. You can simply add another step after the Snapshot Agent is run and before the agent logs the error messages. For example, suppose we want to add a new user, apaul. In the Job Properties window (shown previously in Figure 7-8), select step 3 and click the Insert button. Select the General tab and enter the following in the Command section: CREATE USER [apaul] FOR LOGIN [NT AUTHORITY\SYSTEM] WITH DEFAULT_SCHEMA=[myinventory] This is shown in Figure 7-15.

In this chapter, I introduced distributed Service Broker applications. When you distribute Service Broker services to different SQL Server machines (maybe because of scale-out scenarios), you only have to configure the Service Broker applications. You don t have to change any service implementation or the message-sending code. Service Broker accomplishes this with routes. A route defines on which network address a Service Broker service is physically available. It doesn t matter whether a Service Broker service is deployed locally or on a remote machine connected through a LAN or WAN. After setting up all necessary routes, you have to create endpoints on each SQL Server machine. An endpoint enables another SQL Server instance to communicate with you over a TCP/IP connection. The underlying communication protocol of Service Broker (the ABP) is also able to multiplex several different Service Broker conversations over a single TCP/IP connection. After you set up your Service Broker endpoints, you have to configure transport security. Service Broker offers you two different modes: Windows-based and certificate-based transport security. Certificate-based transport security provides you more flexibility, because Windowsbased transport security only works when both Service Broker endpoints are located in the same Windows domain, which is seldom the case when you communicate with your trading partners.

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Figure 7-15. Adding SQL scripts in the Command section By clicking the Parse button, you can check the SQL syntax. You can also run a SQL script by clicking the Open button and selecting the file. I have named the step create user. If you clicked the Parse button, click OK to get back to the Job Step Properties window (shown previously in Figure 7-15). Now select the Advanced page of the Job Step Properties window. The configuration is shown in Figure 7-16. In the Output file text box, enter the directory and name of the file in which you want to view the logged steps of the execution of the text. Click OK to get back to the Job Properties window (shown previously in Figure 7-8). Click OK again to return to the SSMS. Now locate the agent you just finished configuring in the Object Explorer of the SSMS. It will be under the Jobs object, as shown in Figure 7-17.

Figure 7-16. Selecting the output file that will store the messages Right-click the job and select the Start Job at Step option. You will see the window shown in Figure 7-18, which lists the four job steps. You can step through the job, or just go directly to any given step.

27. Add a new time dimension by right-clicking Dimensions on the Solution Explorer and selecting New Dimension. 28. Click Next to get past the introductory page. On the next page, select Generate a time table on the server . Click Next. 29. Use the Define Time Periods page to select time periods and configure the calendar. Ensure Date is selected, since it will need to be used as the key. An example is shown in Figure 6-28. Click Next.

By now, you ve seen everything about Service Broker that you need to implement asynchronous, reliable, distributed, and secure message-based applications with Service Broker. This chapter is also the end of the first part of this book, which was devoted to the general Service Broker programming model. In the second part of this book, which starts with the next chapter about advanced distributed Service Broker programming, I ll show you more complex Service Broker scenarios. In the next part, I ll cover advanced security configurations, using Service Broker as the message bus for SODA architectures, using Service Broker in real-world scenarios, and scaling out Service Broker applications to any required size. Finally, I ll end with a chapter about the administration of Service Broker applications. Stay tuned.

Figure 7-18. Viewing the four job steps In this case, select step 2 and click the Start button. You can see that the step has been executed successfully in Figure 7-19.

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