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Implementing Polling and Event-Driven Consumers
{ by Juan I. Arriaga }
Twin Cities Connected Systems
User Group (Nov.17th, 2011)
WCF SQL SERVER
ADAPTER
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eWorldTree.com
Overview of the WCF SQL Adapter
BizTalk examples
A case study of using the WCF SQL Adapter outside of BizTalk
Questions & answers
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Twin Cities Connected Systems
User Group (Nov.17th, 2011)
Agenda
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WCF SQL SERVER ADAPTER
OVERVIEW
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eWorldTree.com
• For other differences, refer to:
Thiago Almeida’s blog post at
http://connectedthoughts.wordpress.com/2011/01/18/wcf-sql-versusthe-old-sql-adapter/
Richard Seroter’s SOA Patterns with BizTalk Server 2009 (Chapter 9) .
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• The classic SQL adapter does not support SQL Query
Notification; the WCF SQL Adapter does.
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Classic SQL Adapter vs. WCF SQL
Adapter
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eWorldTree.com
Twin Cities Connected Systems
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Polling Consumer
Source: http://www.eaipatterns.com/PollingConsumer.html by Gregor Hohpe and Bobby Wolf.
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Event-Driven Consumer
Source http://www.eaipatterns.com/EventDrivenConsumer.html by Gregor Hohpe and Bobby Wolf.
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Query Notification vs. Polling
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WCF SQL SERVER ADAPTER
BIZTALK EXAMPLES
Polling Consumer
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eWorldTree.com
Download & install:
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WCF SQL Adapter Installation
• Microsoft BizTalk Adapter for SQL Server (WCF SQL Adapter)
NOTE:
(1) The WCF SQL adapter is also available as part of the BizTalk Adapter Pack.
(2) A BizTalk license is required.
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• WCF LOB Adapter SDK SP2
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Configure Adapter
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Consume Adapter Service
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Configure Binding
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Consume Adapter Service
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Typed Polling Contract
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Consume Adapter Service
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Generated Items
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Consume Adapter Service
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WcfReceiveLocation for polling
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BizTalk Admin Console
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Simple send port to trace polling data
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BizTalk Admin Console
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Time to build the example from scratch!
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Sample of Typed Polling Data
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WCF SQL SERVER ADAPTER
BIZTALK EXAMPLES
Event-Driven Consumer
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• To verify whether Service Broker is enabled or not:
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SQL Service Broker Verification
ALTER DATABASE [MyDB] SET ENABLE_BROKER;
or
ALTER DATABASE [MyDB] SET ENABLE_BROKER WITH ROLLBACK
IMMEDIATE;
Twin Cities Connected Systems
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• To enable Service Broker functionality (if needed):
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SELECT is_broker_enabled FROM sys.databases WHERE name = ‘MyDB’;
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Configure Adapter
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Consume Adapter Service
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Configure Binding
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Consume Adapter Service
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Notification Service Contract
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Consume Adapter Service
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Generated Items
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Consume Adapter Service
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WcfReceiveLocation for notifications
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BizTalk Admin Console
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Simple send port to trace notifications
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BizTalk Admin Console
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Time to build the example from scratch!
eWorldTree.com
Sample of Notifications
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WCF SQL SERVER ADAPTER OUTSIDE OF BIZTALK
CUSTOMER CASE STUDY
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eWorldTree.com
Twin Cities Connected Systems
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eWorldTree.com
WCF SQL Adapter Outside BizTalk
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Add Adapter Service Reference –Generated Items
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Console Service Sample
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Snippet from NotificationAction class
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Console Service Demo
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Snippet from Main Routine
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Console Service Demo
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Changes to SqlAdapterBindingService
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Console Service Demo
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Listener Started Notification
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Console Service Demo
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And after the service is stopped…
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Insert Notification
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Console Service Demo
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• The adapter only receives one notification if the SQL
statement (e.g. INSERT) affects more than one row.
• Consider the use of the NotifyOnListenerStart event to
retrieve pending records after a network communication
breakdown.
• Double check the requirements and restrictions for SELECT
statements in a query notification.
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Caveats & Gotchas
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Branch out your information network ™. Link to eWorldTree™.
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Thank You!
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Q&A
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