Book Image

Microsoft BizTalk ESB Toolkit 2.1

Book Image

Microsoft BizTalk ESB Toolkit 2.1

Overview of this book

An Enterprise Service Bus (ESB) is an architectural pattern and a key enabler in implementing the infrastructure for a service-oriented architecture (SOA). The BizTalk ESB Toolkit is a collection of tools and libraries that extend the BizTalk Server capabilities of supporting a loosely coupled and dynamic messaging architecture. It functions as middleware that provides tools for rapid mediation between services and their consumers. Enabling maximum flexibility at runtime, the BizTalk ESB Toolkit simplifies loosely coupled composition of service endpoints and management of service interactions. The thing about the technology that gets most readers excited is how easy it is to quickly implement flexible and well-architected ESB solutions. "Microsoft BizTalk Server 2010 ESB Toolkit 2.1" provides you with an easy-to-follow view of the tools and services that make up the toolkit. The content is packed with practical examples on how to utilize the technology, which will be appealing to the readers. This book provides you with all the information you need in one publication. The content is based on practical examples on how to use the technology to make it easier for readers to follow. This book starts off with a quick, high level introduction to ESB architectural principles, how these principles map into the ESB toolkit features, and an introduction to the different components that provide those features. The book then reveals the ins and outs of Itineraries. Next, you'll get engaged in the different ways errors can be handled and monitored by means of the ESB Toolkit features. There will be a hands-on sample on building a custom Repair and Resubmit solution to reprocess failed messages. Get to know the different web services that expose the ESB Toolkit features to external applications and how to use them with quick samples. The book ends with a preview to the new version of the toolkit.
Table of Contents (13 chapters)

Creating custom itinerary services

In this section, we will see how to create our own custom itinerary services, both on their messaging and orchestration flavors.

Custom messaging itinerary service

As we mentioned before, the messaging services are implemented as specific classes that will be invoked by the ESB Dispatcher pipeline components.

In order to implement one of those, we need to create a class that implements the IMessagingService interface. This interface defines two properties (Name and SupportsDisassemble) and two methods (Execute and ShouldAdvanceStep) that have to be implemented:

  • Name: It is the name of the service that will be used to reference the service in the itinerary. It will be the one that will identify the service once registered in the ESB configuration file.

  • SupportsDisassemble: It specifies if the component supports disassemble and the execution of multiple resolvers.

  • Execute: It is the method where the processing of the message will take place.

  • ShouldAdvanceStep: It...