soagile

SOAgile

XP days

26 November 2010

www.abc-thinkBIG.cominfo@acb-thinkbig.comladybeetle2u@gmail.com

Agenda, time

Agile core values

“We are uncovering better ways of developingsoftware by doing it and helping others do it.

Through this work we have come to value:

• Individuals & interactions over processes & tools

• Working software over comprehensive documentation

• Customers collaboration over contract negotiations

• Responding to change over following a plan

That is, while there is value in the items onthe right, we value the items on the left more.”

source: Agile Manifesto (www.agilemanifesto.org)

Agile core value

Responding to change……

SOA is all about change

as is the way to implement it

SOA Core values“Service orientation is a paradigm that frames what you do. Service-oriented

architecture (SOA) is a type of architecture that results from applying service

Orientation. We have been applying service orientation to help

organizations consistently deliver sustainable business value, with increased

Agility and cost effectiveness, in line with changing business needs.

Through our work we have come to prioritize:

• Business value over technical strategy

• Strategic goals over project-specific benefits

• Intrinsic interoperability over custom integration

• Shared services over specific-purpose implementations

• Flexibility over optimization

• Evolutionary refinement over pursuit of initial perfection

That is, while we value the items on the right, we value the items on the left more.”

Source: Soa Manifesto (www.soamanifesto.org)

SOA design principles

• Loose coupling

• Service contract

• Autonomy

• Abstraction

• Reusability INTER OPERABILITY

• Compose ability

• Statelessness change ability

• Discoverability

Business reasons for SOA*

• Improved (technical) flexibility, adaptiveness

• Increased revenue / profit

• Reuse of existing services

• New product or service development

• Compliance and Governance

• Cost reduction

• Alignment

* UWV, SOA what?, Beijleveld

SOA for profit, van den Berg et al

Customer, value, early• highest priority: satisfy customers through early and continuous

delivery of valuable software.

• Agile focus: on a single project / product and SOA focuses on the enterprise as a whole this principle aligns perfectly with SOA principles

Change

• Agile processes harness change for the customer's competitive advantage.

• The reason for SOA is the ability to change: “corporate” agility, flexibility, adaptiveness

Frequent delivery• Deliver working software frequently, from a couple

of weeks to a couple of months, with a preference to the shorter timescale.

• Services are smaller chunks of functionality, delivered incrementally and iterative for business

Working togetherBusiness people and developers must work together

daily throughout the project.

Corporate strategy is formed by

business and IT together;

SOA project only succeed when people

work together, services can only be realized in

cooperation.

comprehensive

comprehensiveness

Motivated people and trust

• Build projects around motivated individuals. Give them the environment and support they need, and trust them to get the job done.

• Motivation &trust is needed, that is a fact of life. Rely on services other deliver, trust colleagues expertise to reuse services not designed or developed by you

http://www.youtube.com/watch?v=rD4roXEY

8hk&feature=related

Face to face interaction

The most efficient and effective method of conveying

information to and within a development team is

face-to-face conversation.

However SOA doesn’t say anything about this, face to

face conversation is a condition for success as any

achievement. A common vocabulary helps.

Sustainable pace?

Sustainable pace!

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• Agile processes promote sustainable development. The sponsors, developers, and users should be able to maintain a constant pace indefinitely.

• This healthy principle should be promoted in any project. Happy workers are more successful, work smarter and deliver better

Measure

Working software is the primary measure of

progress.

SOA defines services as the main deliverable.

You build software that supports the service.

quality• Continuous attention to technical excellence and

good design enhances agility.

• SOA demands a high level of technical excellence for interoperability

SimplicitySimplicity--the art of maximizing the amount

of work not done--is essential.

A service is a realization of simplicity: a small

loosely coupled, autonomous, compose able piece

Self organizingThe best architectures, requirements, and designs emerge

from self-organizing teams.

This principles seems to contradict an enterprise

architecture approach like SOA. But, a bigger picture from

product owner perspective, is really necessary.

retrospective• At regular intervals, the team reflects on how to

become more effective, then tunes and adjusts its behavior accordingly

• SOA give the team a concrete product and a set of principles to measure quality, to talk about.

Views & Experiences

Conclusions

• Agile makes SOA more adaptive to change

• Agile + SOA nourishes cooperation with customer and transparency

• SOA standards facilitate Business Agility

• Agile prevents SOA getting tool specific

• Agile + SOA give focus on results

SOA won’t work without Agile

Agile & SOA works best together

SOA + Agile keep each other sane & in balance

Some conditions for success

• Organizational Mindset Change

• Management view: learning oriented

• Engaged & responsible people = disciplined people and not: NIH, BOHICA

• Focus on business value and quality

• Neither religious Agile, nor religious SOA

• Proof by delivering the valuable services / software

• Celebrate success

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QA

discuss

Wrap up Thank you!

Links:http://www.soamanifesto.org

http://www.agilemanifesto.org

http://www.infoq.com/articles/agile-soa

http://www.abc-thinkBIG.com/weblog/

http://www.approach.nl/2008/12/soa-and-agile/

http://www.leanarch.eu/

http://www.xr-magazine.nl/artikelen/210/agile/architectuur-op-een-agile-manier

http://www.via-nova-architectura.org/files/GroningenUniversity/Beijleveld.pdf

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