soa patterns


Services, Microservices, Nanoservices – oh my!

Posted on March 25th, by Arnon Rotem-Gal-Oz in Blog, SOA Patterns. 2 comments

Apparently there’s this new distributed architecture thing called microservices out and about – so last week I went ahead and read Martin Fowler’s & James Lewis’s extensive article on the subject . and my reaction to this was basically:

I guess it is easier to use a new name (Microservices) rather than say that this is what SOA actually meant – re http://t.co/gvhxDfDWLG

— Arnon Rotem-Gal-Oz (@arnonrgo) March 16, 2014

Similar arguments (nothing new here) were also expressed after Martin’s tweet of his article e.g. Clemens Vasters’ comment:

@martinfowler @boicy but these are the very principles of SOA before vendors does pushed the hub in the middle, i.e. ESB — Clemens Vasters (@clemensv) March 16, 2014

Or Steve Jones’ post “Microservices is SOA, for those who know what SOA is.”

Autonomy, smart endpoints, events etc. that the article talks about are all SOA concepts – If … Read More »

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A couple of SOA Q&As

Posted on September 6th, by Arnon Rotem-Gal-Oz in Blog. No Comments

Every now and then I get some question by email, I usually just answer them directly but considering I got 2 such questions this week and that I have’t blogged for awhile (I do have a post about YARN which I hope to finish soon) – I thought I’d also publish my replies here.

Question #1 from Simon:

In your very interesting article “Bridging the Impedance Mismatch Between Business Intelligence and Service-Oriented Architecture” you highlight the challenges for BI and SOA to co-exist – that was 6 or so years ago – have you seen any advances that would cause you to revise that view?

I think the gap and dissonance between SOA needs and BI needs is still there. However, in addition to event publishing mentioned in the article, I see the approach to getting to BI on SOA getting more standardized. … Read More »

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SOA patterns added to Intel’s recommended reading list

Posted on July 23rd, by Arnon Rotem-Gal-Oz in Blog, SOA Patterns. No Comments

Last month I received a nice letter from Intel saying that my SOA patterns book was added to their list of recommended reading they curate. below are the relevant quotes from the letter:

“We are pleased to announce that a book published by Manning, SOA Patterns, by Arnon Rotem-Gal-Oz, has been selected for Intel Corporation’s Recommended Reading List for 2H’13. Congratulations!

Our Recommended Reading Program partners with publishers worldwide to provide technical professionals a simple and handy reference list of what to read to stay abreast of new technologies. Dozens of industry technologists, corporate fellows, and engineers have helped by suggesting books and reviewing the list. This is the most comprehensive reading list available for professional computer developers and IT professionals.”

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SOA Patterns is “deal of the day” on Manning’s site (Apr. 14th)

Posted on April 13th, by Arnon Rotem-Gal-Oz in Blog, Featured Posts, SOA Patterns. No Comments

I just got a notice from Manning that my book SOA patterns will be featured as “deal of the day” on Apr 14th – that means that it will be available for 50% off starting Midnight US ET of April 14th (and considering it’s a world-wide offer it would actually last for more than 24 hours).

To get the 50% discount use code dotd0414au at www.manning.com/rotem

If you’re not familiar with my book (which I guess is unlikely if you’re reading my blog, but anyway), you might want to check out the SOA Patterns page on my site, read one or more of the pattern draft or check out the book reviews.

Reviews of SOA patterns

Cameron McKenzie @ TheServerSide.com
Tad Anderson @ Java Developers Journal
Roberto Casadei @ robertocasadei.it
Colin Jack @ losTechies (half a book review)
Jan Van Ryswyck @ ElegantCode.com (half a book review)
Karsten Strøbæk @ … Read More »

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The Saga pattern and that architecture vs. design thing

Posted on January 24th, by Arnon Rotem-Gal-Oz in Blog, Featured Posts, SOA Patterns. No Comments

It has been few months since SOA Patterns was published and so far the book sold somewhere between 2K-3K copies which I guess is not bad for an unknown author – so first off, thanks to all of you who bought a copy (by the way, if you found the book useful I’d be grateful if you could also rate it on Amazon so that others would know about it too)

I know at least a few of you actually read the book as from time to time I get questions about it :). Not all the questions are interesting to “the general public” but some are. One interesting question I got is about the so called “Canonical schema pattern“. I have a post in the making (for too long now,sorry about that Bill) that explains why I don’t consider it … Read More »

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SOA Patterns : Composite Frontend

Posted on October 17th, by Arnon Rotem-Gal-Oz in Blog, Featured Posts, SOA Patterns. 2 comments

I am not blogging much these days – most of it is due to trying to get my bloody book finished. A case study and a finished anti-pattern chapter where recently pushed to the MEAP, and here’s one additional pattern from chapter 6 (service consumer patterns):

When we try to think about service consumers, the obvious candidates are, of course, other services. Nevertheless there are other software components that interact with services e.g. legacy systems,  Non-SOA external systems or reporting databases. The Composite Frontend pattern deals with yet another type of service consumer – the User interface.

 

First let just verify that User interfaces aren’t in fact services. One reason user interfaces are not services is that they converge several business areas e.g. if you want to enter an order you’d probably also want to lookup information about the customer, maybe you’d … Read More »

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SOA Patterns short status update

Posted on October 6th, by Arnon Rotem-Gal-Oz in Blog. 6 comments

First off, In the previous post I published the Transactional Integration anti-pattern – if you need it for off-line reading you can also get it in PDF form.

I am currently writing the “3-tier SOA” anti-pattern and it seems that together with “Whitebox services” anti-pattern it will complete the anti-patterns chapter. The two other anti-patterns in the chapter are Nanoservices and the Knot

I’ve also started writing the composite-front end pattern (e.g. portals,  prism etc.) but mid-way I thought about it  and stopped. I basically realized that there are a few patterns that are pretty common to SOA on one hand, but you are much more likely to use a 3rd party solution that includes them than to realize them yourself. These include the composite front-end mentioned above, repository, orchestration, servicebus, service host that appears in chapter 2 (though I think that is marginal … Read More »

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