Does my Bus look big in this?
Keynote Session
Martin Fowler and Jim Webber

Integration: A Retrospective
(Save Ferris)

Back in the day

Application silos were normal

Some smart people spotted a niche

And they built integration software

And it sort of worked

And silos were bridged
(and yes, it was that ugly)

Over the years

Competitors came along

Integration experts grew powerful

And integration software grew…

… the wrong way

On a rich diet
Transformations
BPM
Security
GUI
Tools
Reliability
Low
Rules Latency
Engine
Adapters

And more silos were bridged
(it doesn’t get any prettier)

SOA to the rescue!

Same Old Architecture?
BPM
Services
Business Business Business
Service Service Service
Basic Basic Basic Basic Basic
Service Service Service Service Service

Same old atrocity
Accounting Marketing
Product Development Support

ESB – Enterprise Service Bus? Or…
BPM Business Business Business
Service Service Service Service
ESB
Basic Basic Basic Basic Basic
Service Service Service Service Service

ESB - Erroneous Spaghetti Box?
Enterprise Service Bus

Architectural Fantasy

Ungovernable

Doesn’t Scale

Big SOA gets political
Your cunning co-
worker
You and your boss

Mainstream SOA Today
+

But resistance is not futile

Agility
(Meanwhile, back in Gotham City...)

The beauty of traditional process

Time for a group hug!

We got tools and techniques...

Learning to grow, incrementally

Frameworks got better at agile too

T’Interweb
(Surprisingly isn’t just great big Rails app)

Why the Web was inevitable...
Tim Berners-Lee is a physicist
(Sir Tim is also a knight, but that’s not
important right now)

Why the Web was inevitable...
He lived in a hole in the ground
Underneath a big mountain

Why the Web was inevitable...
And because he was a physicist (and
not yet a knight)...
...he only had a big atom-
smashing thing for
company

Why the Web was inevitable...
And for a lonesome physicist stuck
underground with smashed up
atoms for company...
...gopher just wasn’t
going to cut it!

The Web broke the rules

The Web is protocol-centric

Dumb network, good idea!

Innovation at the edges, heavy lifting in
the cloud

It has a serendipitous architecture

La lucha continua!
(Guerrilla SOA, slight return)

Traditional SOA
Us
Them

Guerrilla SOA

Services Host Business Processes
Service Infrastructure (Endpointware)

Business people own those processes

Business folks own services
Service
Infrastructure
(Endpointware)

Prioritise and deliver incrementally

Then re-prioritise and keep delivering

Web-based Services
(The browser is your granddad’s Web)

The Web is middleware

Ubiquitous on-ramp

Incremental

Low risk

Middleware optional

We still don’t like ESBs
(with one or two exceptions)

Proxy server is your ESB
Service Service Service Service
Big, Big Proxy Server
Service Service Service Service Service

A brilliant flash of hindsight
•Proprietary middleware •Web-centric techniques
–BUFD –Evolutionary design
–Lengthy death-marches –Constant delivery
–Expensive –Inexpensive
–Risky –Incremental
–Enterprise scale –Internet scale
–Specialised –Commoditised
–Integration separate –Integration by-product of
activity delivering business value
–Not very sensible –Quite sensible

Martin Fowler Jim Webber
http://martinfowler.com http://jim.webber.name