Check it out! New whitepaper on Transactional Adapters and Adapter Base Classes

mmckeown — Tue, 16 May 2006 22:04:00 GMT

I took a lot of your valuable reviewer feedback (thank you, see earlier post) and completed my whitepaper entitled, "Developing a Transactional BizTalk Adapter Using the Microsoft Base Adapter Classes". You can download it at http://download.microsoft.com/download/3/7/6/376a6f6c-8c97-4ab5-9d5a-416c76793fbb/Transact_Adapter.doc. The paper discusses at a low-level (with code snipets) transactional adapters, the Base Adapter classes and their hierarchy, and additional rarely-documented adapter design issues. So take a look and pass it on to anyone doing adapter development.

After you read it I am very interested in your feedback - please post here if you would. Hope this helps!

Mike

Components of a Design Time Adapter

mmckeown — Tue, 28 Feb 2006 13:52:00 GMT

Here is some content I am publishing on static vs dynamic design time adapters. There seems to be some confusion on documentation I have seen with respect to what exactly are we referring to when we mention "static" and "dynamic" in the context of design time. Maybe this will help somoe folks understand better - I felt it was to the point and useful.

I also am solicting feedback on existing documenation from anyone who has struggled trying to understand this simple differentiation that is often somewhat confusing how it is written. How can we make this better for you? Thank you!

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Components of a Design Time Adapter

An adapter contains both a run-time and a design-time component. The run-time component is not visible to a user. It is transparently responsible for the transmission, receipt, and processing of BizTalk Server messages.

The design-time component of an adapter is visible through administrative user interfaces. It is responsible for displaying available properties, accepting administrative input, and validating that input to configure an adapter. It is critical that the design-time component allow proper configuration of the adapter's properties to enable the run-time functionality to exchange messages correctly.

Here we consider only the design-time component of an adapter. We will thus be concerned primarily with how to display and set the adapter's configuration. There are two methods of configuring an adapter:

· Property browser. Adapter properties for a send or receive port, or a send or receive handler, are configured through their Properties menu by using the BizTalk Server Administration console. During configuration of these artifacts the adapter (transport) is selected and its properties are configured by using a property browser. Applicable properties are displayed through a schema with a set name. For instance, for a send (transmit) handler the properties would be in the TransmitHandler.xsd file; for a receive location they would be in the ReceiveLocation.xsd file. The adapter implements the IAdapterConfig interface to locate and load the appropriate schema to expose specific properties in the property browser. The IAdapterConfigValidation interface is used to validate those entries and make any final modifications to the values before saving the configuration data.

· Add Adapter Metadata Wizard. This is (slightly) renamed for Biztalk Server 2006 by adding the term "Metadata". In the case of application and database adapters, you may need to import supporting schemas that describe message types and port types that the adapter needs in the BizTalk project in Visual Studio 2005. Or sometimes there is the need to consume services provided by the adapter. The Add Adapter Metadata Wizard enables you to view services that an adapter supports and import the related message types and port types into your project. This process is known as "metadata harvesting." As an adapter developer you create an XML file describing those services and expose it to the wizard at design time through either the IStaticAdapterConfig or IDynamicAdapterConfig interface, with the following results:

a. Static adapter. The wizard provides a standard default hierarchical tree structure with which to display the adapter's services. A static adapter is defined as an adapter that uses the standard tree user interface (UI) provided by the wizard. Use the IStaticAdapterConfig.GetServiceOrganization and GetServiceDescription methods to allow selected services to be added to the BizTalk project. This is the simplest configuration option for an adapter developer, but the tradeoff is rigidity of the display format.

b. Dynamic adapter. If the basic service selection UI provided by the wizard is not flexible enough meet your UI needs you can create a custom UI that is dynamically displayed by the wizard. Use the IDynamicAdapterConfig.DisplayUI method to display the custom UI to allow selection of services to be added to a BizTalk project.

BizTalk Adapter Development : Learning Concepts

Check it out! New whitepaper on Transactional Adapters and Adapter Base Classes

Components of a Design Time Adapter