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May 08, 2005

Comments

Radovan Janecek

Graham, I very much agree with your approach: ESB as a collection of services. Though I don't think there should be a 'service providing reliable messaging', just for example.

I see two types of ESB vendors:

1) EAI players that have no 'SOA' technology. ESB is marketing survival strategy.

2) EAI players that have 'SOA' technology but their marketing departments insanely jumped into the ESB trap.

Ronan Bradley

There is a general tendency to dumb down what an ESB can or should do. Following on from Radovan's comment, this is much more to do with what EAI vendors have today than what customers want from an ESB.

To comment on the analogy of ESB = circulatory and nervous system: I beg to differ.

Unlike most organizations' IT, the human body was designed to work together as a single integrated whole: It has evolved by creating a completely new body with some minor changes - rather different to IT which must live with its entire evolutionary history at any one time.

If the human body was like most organizations, we might well have the combination of the heart from a dinosaur, perhaps some gills to breath with and the left leg of a neanderthal! And then one day we would wake up and discover that we now have two heads and an extra leg following a merger with the dog next door.

If this was the case, our circulatory and nervous system would have to be a lot smarter than firing messages off and pumping hormones around!

We all know that is the case with large organizations and that is why an ESB needs to be a lot smarter and in fact deliver many of the EAI capabilities - all be it in a standards based, easy-to-use/easy-to-evolve, quick to implement fashion.

Fatos

Thanks Graham for ths post, this was very intresting for me as i am new in this technology and i think you explained it well.

thanks again and regards

fatos

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