The Zen of SOA 219
Alex Roussekov writes "The book "Zen of SOA" by Tom Termini introduces an original view to the challenging world of SOA. He refers to the Zen philosophy as a "therapeutic device" helping SOA practitioners to get rid of prejudices and opinions in order to apply a clear mind-set based on real-life experiences and the application of technology knowledge. Each chapter of the book is prefaced by Zen Truism that the author suggests to "revisit, reflect on it longer, and see if you are able to establish a truth from the narrative, as well as from your own experiences." In fact, the book is about a SOA Blueprint outlining a methodology for building a successful SOA strategy. The target audience is C-level Executives, IT Managers and Enterprise Architects undertaking or intending to undertake adoption of SOA throughout their organizations. I strongly recommend the book to all SOA practitioners involved in implementation of SOA." Read below for the rest of Alexander's review.
| The Zen of SOA | |
| author | Tom Termini |
| pages | 112 |
| publisher | BlueDog Ltd (November 21, 2008) |
| rating | 9/10 |
| reviewer | Alexander Roussekov |
| ISBN | ISBN 978-0-615-24703-8 |
| summary | provides a clear methodology to guide SOA implementations |
The author's vision is based on extensive experience in the SOA arena and he elegantly leads and prepares the reader for the introduction of his SOA Blueprint approach. I personally enjoyed reflecting on the Zen conundrums which stimulated me to focus and understand the content.
In Chapter 1 the author explains SOA as both Business and Technical Concept and the main challenges it tackles from different stakeholder perspectives. He also emphasizes some misconceptions and technology myths about Web Services and ESB which are key enablers but do not represent a holistic view of SOA.
Chapter 2 elaborates on using the SOA Best Practices as a critical success factor for maximizing an organization's potential and improving performance. The author recommends an Incremental Approach to the SOA Implementation. This is supported by a comprehensive Case Study with the US Federal Trade Commission client.
Chapter 3 gives a technology view of SOA. The author covers a number of SOA technology components, their capabilities and positioning within the SOA technology stack including Portal, ESB, Service Registry/Repository, Business Rules and Enterprise Search Engines.
In Chapter 4 — the concept of "Future-Proof" is defined by the author and his team as "architecting to be highly available, reliable, and easy to manage."
The future-proofing is an inherent quality factor with technological and cultural aspects which need to be achieved throughout the overall SOA Lifecycle. The author suggests that "a pilot, or proof-of-concept, presented in advance of implementation and deployment, can convincingly demonstrate the ability of the architecture to validate the business intent".
Chapter 5 presents the author's rationale for an incremental approach to SOA implementation. The main point is that the contemporary business dynamic creates a myriad of competitive pressures which impose significant risks, whereas an incremental approach shields the business from the SOA implementation demands and helps to accommodate the changes and utilize the benefits.
Chapter 6 "The SOA Blueprint" is the essence of the book. It is a "set of guidelines for the practical business deployment of services using SOA methods in a moderately sized, somewhat complex organization". The author has used the OASIS' reference models for SOA as a foundation framework. The Blueprint is also consistent with well defined and recognized methodologies such as TOGAF and Zachman. For example, the Blueprint artifacts fit well in the taxonomy of the Zachman Architectural Framework and they can be mapped to corresponding activities in the TOGAF ADM.
Chapter 7 provides practical guidance and recommendations related to the context of the SOA Blueprint. The author puts the focus on Standardization, Business Customer Perspective of Services, Risk Mitigation Strategy as well as technical aspects such as Data Integration, Service Orchestration, Security and Metadata.
Finally, Chapter 8 offers a checklist with a number of items required for the customization of the SOA Blueprint. The author provides both item definitions and procedural guidance.
Tom Termini shares deep expertise and knowledge gained by hard work on numerous SOA projects for government and private sector clients. His examples of real business value achieved can be traced in the case studies described in the book. Each case study is related to a particular SOA "koan" and comes with the description of the business context, approach, solution and the business benefits obtained as a result.
The Zen of SOA is a concise, readable and very well illustrated book which provides practical advice, guidance and immediate impetus for development of SOA Implementation Strategy, Vision, Roadmap.
You can purchase The Zen of SOA from amazon.com. Slashdot welcomes readers' book reviews -- to see your own review here, read the book review guidelines, then visit the submission page.
Single provider and SOA? (Score:4, Interesting)
One question that recently cropped up is whether SOA makes any sense if you are only connecting with a single data provider? The idea being that the architectural and maintenance costs don't make sense in this scenario since there is just too much over heard. Once you have a requirement connecting to multiple data providers then the effort pays out. Just curious to hear what /.ers have to say.
Eh Sonny? (Score:5, Interesting)
They're like Otaku with 401Ks.
Re:SOA (Score:4, Interesting)
No. It's a loose coupling of different applications and such into services, and then coupling those services with business logic to produce a new application. Think middleware.
Re:Single provider and SOA? (Score:5, Interesting)
That's what SOA aims at: interchangeable components in systems. You're not crafting one big program, or complex of programs, from end-to-end, making it up as you go. You're building uniformly-structured and interchangeable components, and assembling them.
You mean... like Unix?
Re:The Zen of First Post (Score:1, Interesting)
Re:SOA (Score:2, Interesting)
Ah, so it's a way to sell more machines to run more infrastructure software (also sold) which companies think will increase their scalability, which they don't really need because most of them are never going to have the amount of business that would force them to scale, where simple client-server software would suffice while they're going down the tubes.
Guess you've never been to the other side of that. The other side of that is a set of applications that are good enough to win your company the business, but that don't work together at all.
You can say "you should have thought about that in the first place, good design would have cleared that up" but good, thorough design that attempts to make everything work together flawlessly results in long development cycles and lost business.
Our company won, we built the best products and got the market share, and now we've got a set of applications that our customers expect and want to work together, and we are struggling to deliver it.
SOA is one way we can help with this problem. We can add SOA interfaces to each application, and start constructing the one integrated product our customers want, in an orderly way, quickly, without re-writing all our apps, and piecemeal. We can add SOA interfaces to each application's back end, one at a time, prove it works, and then work on meta-applications to combine the results.
We built much of the software to handle this ourselves. There are OSS options for most pieces of this architecture if we wanted to use an ESB engine (check out Mule for example), and with our VM environment we should not need significant investment in infrastructure. We just need time to build it, and hence corporate wherewithal.
SOA (and ESB and the like) in-and-of themselves will not provide a solution to enterprise integration, any more than the EAI engines of 10 years ago, but at least they provide a common technology to build around so that other developers can tap into the functionality of our applications.