Home > Articles

This chapter is from the book

Running the Stock Application

In this section, we’ll compile, register, and enable the application; start its engine running; and then feed it sample data. We’ll submit events and subscriptions as described earlier and then observe the notification data written to the output file.

Assuming that your development environment is set up as described in Chapter 2, you can complete the steps described here to get the application going. In this chapter, I’ve just listed the steps without explaining the purpose of each one in detail. Chapter 4 goes into the details of what these steps actually do.

  1. If you have not already done so, open the C:\SQL-NS\Samples\StockBroker\StockBroker.ssmssln solution in Management Studio.

  2. If the Object Explorer pane is not visible, open it by selecting Object Explorer from the View menu, or by pressing F8.

  3. In the Object Explorer, connect to the SQL Server you plan to use for SQL-NS development. To do this, click the Connect button, choose Database Engine from the drop-down list, enter the connection information in the dialog box that appears, and finally, click Connect. If you’re using SQL Server Authentication, make sure you connect using the credentials of your development account.

  4. In the Object Explorer tree, find the Notification Services folder. It should be empty, unless any SQL-NS instances already exist on the SQL Server.

  5. Right-click the Notification Services folder and select New Notification Services Instance.

  6. In the New Notification Services Instance dialog box, click the Browse button to browse for the stock instance’s ICF. In the File Open dialog box, navigate to C:\SQL-NS\Samples\StockBroker and select the InstanceConfiguration.xml file.

  7. The Parameters grid in the New Notification Services Instance dialog box will be populated with the parameters from the ICF. You should not have to change any of these values.

  8. Check the box labeled Enable Instance After It Is Created, below the Parameters grid.

  9. Click the OK button to begin compiling the instance and its associated application. A progress dialog box will appear, listing the various steps being performed. When all steps are complete, you should see the status reported as Success. When this happens, click Close to dismiss the progress dialog box.

  10. Now you should see a new item in the Notification Services folder in the Object Explorer tree: an instance named StockBroker.

  11. Right-click this new instance and select Tasks, and then select Register from the context menus. The Register Instance dialog box opens.

  12. Check the box labeled Create Windows Service.

  13. Beneath the Service Logon label, enter the name and password for the Windows user account you created in Chapter 2 to run the SQL-NS service. If your service user account is a domain account, don’t forget to qualify the account name with the domain name.

  14. If you’re using SQL Server Authentication, select the option button labeled SQL Server Authentication beneath the Authentication label. Enter the SQL login name and password for the test account you created in Chapter 2. If you’re using Windows Authentication, leave the Windows Authentication option button selected.

  15. Click OK to begin registering the instance. A progress dialog box listing the various registration operations will appear. When registration completes successfully, click the Close button to dismiss the progress dialog box.

  16. In the Solution Explorer, expand the Queries folder under the StockBroker project and open the SQLPermissions.sql file. Execute the code in this file by pressing F5. This grants the SQL-NS service permission to access the application’s database.

  17. Right-click the StockBroker instance in the Object Explorer and select Start from the context menu. Click Yes in the confirmation dialog box to proceed with starting the SQL-NS service for the instance.

At this point, the application should be running, and we can start submitting subscriptions and events. If your service does not start correctly, refer to Chapter 15, "Troubleshooting SQL-NS Applications," for suggestions on how to diagnose the problem.

To add subscribers, subscriptions, and events, we’ll use the T-SQL test script you examined earlier:

  1. Open the Test.sql file in Management Studio. The file is located under the Queries folder in the StockBroker project.
  2. Before you run Test.sql, open the FileNotifications.txt file from the Miscellaneous folder under the StockBroker project in the Solution Explorer. This is the output file to which the notifications will be written when events are matched against subscriptions. When you first open it, the file should be blank.
  3. Go back to Test.sql and execute its contents by pressing F5.

After Test.sql completes, the SQL-NS engine begins processing the events and subscriptions by executing the matching logic query defined in the ADF. The distributor in the SQL-NS engine picks up the rows of data that result from the matching query, formats them, and then writes the formatted messages out to the notifications file. Within about a minute, Management Studio should pop up a dialog box telling you that the FileNotifications.txt file has changed and asking you if you want to reload it. Click Yes to reload the file and you will see the contents of the notifications that were generated.

The particular event and subscription data submitted by the Test.sql script was chosen to generate some matches. If you go back and look at the data values in Test.sql, you’ll easily see which events and subscriptions satisfy the matching criteria defined by the query in the ADF. The contents of the FileNotifications.txt file should reflect these matches.

Feel free to edit Test.sql and enter some new events and subscriptions with different values. If you do this, be certain that you don’t rerun the statements that enter subscriber and subscriber device records: SQL-NS does not allow duplicate subscribers or subscriber devices, so these statements should be run only once. After you submit new events and subscriptions, any matches that occur will result in new notification messages written to FileNotifications.txt.

InformIT Promotional Mailings & Special Offers

I would like to receive exclusive offers and hear about products from InformIT and its family of brands. I can unsubscribe at any time.


Pearson Education, Inc., 221 River Street, Hoboken, New Jersey 07030, (Pearson) presents this site to provide information about products and services that can be purchased through this site.

This privacy notice provides an overview of our commitment to privacy and describes how we collect, protect, use and share personal information collected through this site. Please note that other Pearson websites and online products and services have their own separate privacy policies.

Collection and Use of Information

To conduct business and deliver products and services, Pearson collects and uses personal information in several ways in connection with this site, including:

Questions and Inquiries

For inquiries and questions, we collect the inquiry or question, together with name, contact details (email address, phone number and mailing address) and any other additional information voluntarily submitted to us through a Contact Us form or an email. We use this information to address the inquiry and respond to the question.

Online Store

For orders and purchases placed through our online store on this site, we collect order details, name, institution name and address (if applicable), email address, phone number, shipping and billing addresses, credit/debit card information, shipping options and any instructions. We use this information to complete transactions, fulfill orders, communicate with individuals placing orders or visiting the online store, and for related purposes.


Pearson may offer opportunities to provide feedback or participate in surveys, including surveys evaluating Pearson products, services or sites. Participation is voluntary. Pearson collects information requested in the survey questions and uses the information to evaluate, support, maintain and improve products, services or sites, develop new products and services, conduct educational research and for other purposes specified in the survey.

Contests and Drawings

Occasionally, we may sponsor a contest or drawing. Participation is optional. Pearson collects name, contact information and other information specified on the entry form for the contest or drawing to conduct the contest or drawing. Pearson may collect additional personal information from the winners of a contest or drawing in order to award the prize and for tax reporting purposes, as required by law.


If you have elected to receive email newsletters or promotional mailings and special offers but want to unsubscribe, simply email information@informit.com.

Service Announcements

On rare occasions it is necessary to send out a strictly service related announcement. For instance, if our service is temporarily suspended for maintenance we might send users an email. Generally, users may not opt-out of these communications, though they can deactivate their account information. However, these communications are not promotional in nature.

Customer Service

We communicate with users on a regular basis to provide requested services and in regard to issues relating to their account we reply via email or phone in accordance with the users' wishes when a user submits their information through our Contact Us form.

Other Collection and Use of Information

Application and System Logs

Pearson automatically collects log data to help ensure the delivery, availability and security of this site. Log data may include technical information about how a user or visitor connected to this site, such as browser type, type of computer/device, operating system, internet service provider and IP address. We use this information for support purposes and to monitor the health of the site, identify problems, improve service, detect unauthorized access and fraudulent activity, prevent and respond to security incidents and appropriately scale computing resources.

Web Analytics

Pearson may use third party web trend analytical services, including Google Analytics, to collect visitor information, such as IP addresses, browser types, referring pages, pages visited and time spent on a particular site. While these analytical services collect and report information on an anonymous basis, they may use cookies to gather web trend information. The information gathered may enable Pearson (but not the third party web trend services) to link information with application and system log data. Pearson uses this information for system administration and to identify problems, improve service, detect unauthorized access and fraudulent activity, prevent and respond to security incidents, appropriately scale computing resources and otherwise support and deliver this site and its services.

Cookies and Related Technologies

This site uses cookies and similar technologies to personalize content, measure traffic patterns, control security, track use and access of information on this site, and provide interest-based messages and advertising. Users can manage and block the use of cookies through their browser. Disabling or blocking certain cookies may limit the functionality of this site.

Do Not Track

This site currently does not respond to Do Not Track signals.


Pearson uses appropriate physical, administrative and technical security measures to protect personal information from unauthorized access, use and disclosure.


This site is not directed to children under the age of 13.


Pearson may send or direct marketing communications to users, provided that

  • Pearson will not use personal information collected or processed as a K-12 school service provider for the purpose of directed or targeted advertising.
  • Such marketing is consistent with applicable law and Pearson's legal obligations.
  • Pearson will not knowingly direct or send marketing communications to an individual who has expressed a preference not to receive marketing.
  • Where required by applicable law, express or implied consent to marketing exists and has not been withdrawn.

Pearson may provide personal information to a third party service provider on a restricted basis to provide marketing solely on behalf of Pearson or an affiliate or customer for whom Pearson is a service provider. Marketing preferences may be changed at any time.

Correcting/Updating Personal Information

If a user's personally identifiable information changes (such as your postal address or email address), we provide a way to correct or update that user's personal data provided to us. This can be done on the Account page. If a user no longer desires our service and desires to delete his or her account, please contact us at customer-service@informit.com and we will process the deletion of a user's account.


Users can always make an informed choice as to whether they should proceed with certain services offered by InformIT. If you choose to remove yourself from our mailing list(s) simply visit the following page and uncheck any communication you no longer want to receive: www.informit.com/u.aspx.

Sale of Personal Information

Pearson does not rent or sell personal information in exchange for any payment of money.

While Pearson does not sell personal information, as defined in Nevada law, Nevada residents may email a request for no sale of their personal information to NevadaDesignatedRequest@pearson.com.

Supplemental Privacy Statement for California Residents

California residents should read our Supplemental privacy statement for California residents in conjunction with this Privacy Notice. The Supplemental privacy statement for California residents explains Pearson's commitment to comply with California law and applies to personal information of California residents collected in connection with this site and the Services.

Sharing and Disclosure

Pearson may disclose personal information, as follows:

  • As required by law.
  • With the consent of the individual (or their parent, if the individual is a minor)
  • In response to a subpoena, court order or legal process, to the extent permitted or required by law
  • To protect the security and safety of individuals, data, assets and systems, consistent with applicable law
  • In connection the sale, joint venture or other transfer of some or all of its company or assets, subject to the provisions of this Privacy Notice
  • To investigate or address actual or suspected fraud or other illegal activities
  • To exercise its legal rights, including enforcement of the Terms of Use for this site or another contract
  • To affiliated Pearson companies and other companies and organizations who perform work for Pearson and are obligated to protect the privacy of personal information consistent with this Privacy Notice
  • To a school, organization, company or government agency, where Pearson collects or processes the personal information in a school setting or on behalf of such organization, company or government agency.


This web site contains links to other sites. Please be aware that we are not responsible for the privacy practices of such other sites. We encourage our users to be aware when they leave our site and to read the privacy statements of each and every web site that collects Personal Information. This privacy statement applies solely to information collected by this web site.

Requests and Contact

Please contact us about this Privacy Notice or if you have any requests or questions relating to the privacy of your personal information.

Changes to this Privacy Notice

We may revise this Privacy Notice through an updated posting. We will identify the effective date of the revision in the posting. Often, updates are made to provide greater clarity or to comply with changes in regulatory requirements. If the updates involve material changes to the collection, protection, use or disclosure of Personal Information, Pearson will provide notice of the change through a conspicuous notice on this site or other appropriate way. Continued use of the site after the effective date of a posted revision evidences acceptance. Please contact us if you have questions or concerns about the Privacy Notice or any objection to any revisions.

Last Update: November 17, 2020