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Standards are Great, but Standardisation is a Really Bad Idea

Posted by Paul Downey  on  Dec 12, 2009 1

Paul Downey discusses the risks of premature standardisation, unnatural constraints, partial implementations and open extensions, how to avoid cloud computing lock-in, formal activities versus lightweight open processes as exemplified by open source, Microformats, OpenID, OAuth and other Web conventions being ratified through open, lightweight, continuous agreement.

Lessons Learned From Java EE’s Evolution

Posted by Rod Johnson  on  Dec 05, 2009 4

Rod Johnson talks about Java’s evolution, in particular J2EE, presenting the lessons to be learned from its failures, like committee-led standards and container-managed frameworks, preparing to avoid such mistakes in the future.

Five Considerations for Software Architects

Posted by Kevlin Henney  on  Dec 04, 2009 2

Kevlin Henney does not make recommendations for architecting software but rather brings into discussion five considerations useful to be reflected upon: economy, visibility, spacing, symmetry, emergence.

BDD & DDD

Posted by Dan North  on  Dec 03, 2009 3

Domain Driven Design (DDD) is about evolving a shared model of the domain letting the domain model drive the design. BDD is about establishing a shared understanding of “done” working from the outside in until you get there. DDD enables the use of BDD effectively creating software and BDD helps structure the conversations for DDD.

Beginning an SOA Initiative

Posted by Ian Robinson  on  Dec 01, 2009 1

Ian Robinson on what organizational and social issues should be addressed when starting a new SOA project by identifying business capabilities using user stories, describing services and their contracts, and how to set up teams for delivery.

Power Use of Value Objects in DDD

Posted by Dan Bergh Johnsson  on  Nov 20, 2009 8

Dan Bergh Johnsson refreshes the listeners’ memory on using value objects showing by example how their good use can revolutionize a program’s architecture, simplifying it, making it more readable and testable, in a word, better.

Pimp My Architecture

Posted by Dan North  on  Nov 12, 2009 8

Dan North discusses an example of rearchitecting an application without rewriting it from scratch, and explains general strategies for a holistic rearchitecture such as changing the team culture, removing obsolete technologies, allowing mistakes to be made (and learned from), transitional architectures, introducing bounded contexts, refactoring and emergent simplicity, and rotating through roles.

Coaching Self-Organizing Teams

Posted by Joseph Pelrine  on  Nov 10, 2009 2

Self-organization is a tricky thing. Agile coaches are challenged with how to motivate/persuade/trick their teams into self-organizing and doing things, without telling them what to do. This tutorial presents an approach utilizing leading-edge research and techniques from social complexity science and team dynamics to change the dynamics of a team with the aim of optimizing their work together.

ORM, EDM, ESQL, Entity Framework, LINQ to SQL, LINQ to Entities - Confused?

Posted by Eric Nelson  on  Nov 06, 2009 13

Eric Nelson explains what are ORM, EDM, and ESQL, what is the difference between LINQ to SQL and LINQ to Entities, which one is going to be further developed by Microsoft in the future, accompanied by hands on demos showing how to use them.

Pouring Data on Troubled Markets - Quantitative Portfolio Management Technology at BGI

Posted by Eoin Woods  on  Nov 05, 2009

Eoin Woods explains how Barclays Global Investors (BGI) designed Apex, a new porfolio management system, to meet the challenges it faces and why BGI chose to combine mainstream, boutique and open source Java technologies, including Oracle, WebLogic, Spring, Swing, JIDE, Flux, CPLEX, MVEL and XStream, to create an architecture with some interesting variations on the standard J2EE form.

Data Grid Design Patterns

Posted by Brian Oliver  on  Nov 04, 2009

Brian Oliver explains a number of data grid design patters: Command, Functor, Store and Forward Messaging, and Push Replication. He also mentions some traditional patterns used so far and Coherence Incubator, a repository for design patterns reference implementations.

Thoughts on the Generic vs. Specific Tradeoff

Posted by Stefan Tilkov  on  Nov 03, 2009 4

What is better, a generic solution or a specific one? Stefan Tilkov’s answer is “It depends.” He compares XML vs HTML, DSM-UML, Internal-External DSL, SOAP-REST, and others, outlining the advantages and disadvantages of each solution, showing that there is no certain answer to an architect’s quest to solve his problem, but there are some guidelines helping along the way.

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