Thomas Erl

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Top Stories by Thomas Erl

For a complete list of the co-authors and contributors, see the end of the article. Windows Azure Platform Overview The Windows Azure platform is an Internet-scale cloud computing services platform hosted in Microsoft data centers. Windows tools provide functionality to build solutions that include a cloud services operating system and a set of developer services. The key parts of the Windows Azure platform are: Windows Azure (application container) Microsoft SQL Azure Windows Azure platform AppFabric The infrastructure and service architectures that underlie many of these native services (as well as cloud-based services in general) are based on direct combined application of Stateful Services [786] and Redundant Implementation [766]. This is made possible by leveraging several of the built-in extensions and mechanisms provided by the Windows Azure platform (as ex... (more)

Exclusive SOA Web Services Journal Briefing – Thomas Erl On SOA

With the unwavering prominence of service-oriented architecture (SOA) there is an increasing interest in understanding what exactly it means for something to be considered "service-oriented." Thomas Erl recently completed a lengthy research project for SOA Systems Inc. into the origins of SOA and the current state of service-orientation among all primary SOA technology platforms. This body of work contributed to the mainstream SOA methodology developed by SOA Systems and was also documented in Thomas's new book, Service-Oriented Architecture: Concepts, Technology, and Design. We ... (more)

SOA Pattern of the Week (#4): Service Normalization

Like data normalization, the Service Normalization pattern is intent on reducing redundancy and waste in order to avoid the governance burden associated with having to maintain and synchronize similar or duplicate bodies of service logic." You can see it introduces the Pattern on our publisher page. When designing data architectures, you can easily end up with different databases or even different database tables containing the same or similar data. This has been the root of many well documented data maintenance and quality issues that helped establish data normalization as widel... (more)

SOA Pattern of the Week (#5): Service Decomposition

A service inventory is a living body of services that individually will need the freedom to evolve independently over time. What we learned when documenting the SOA design pattern catalog is that there are patterns that emerged not only at design-time but also during this post-implementation evolutionary stage in a service's lifecycle. There is one common scenario that repeatedly surfaced in many projects: When we model and design services during early stages of SOA adoption we are constrained by current infrastructure and technology. These constraints require that we limit the s... (more)

Cloud Computing, SOA and Windows Azure

For a complete list of the co-authors and contributors, see the end of the article. Microsoft's Software-plus-Services strategy represents a view of the world where the growing feature-set of devices and the increasing ubiquity of the Web are combined to deliver more compelling solutions. Software-plus-Services represents an evolutionary step that is based on existing best practices in IT and extends the application potential of core service-orientation design principles. Microsoft's efforts to embrace the Software-plus-Services vision are framed by three core goals: User expe... (more)