Robert Reppel discusses applying DDD and SOLID techniques in order to improve legacy code, exemplifying with real code.
Eric Evans shares 4 strategies for dealing with messy legacy systems: Bubble Context, ACL Synchronization, Exposing Legacy Assets, and Domain Events Channel.
Oliver Gierke demoes using Spring Data JPA to create repositories using a Domain-driven Design approach.
Richard Pawson discusses a case study of a large pure OO project for the Irish government, presenting the challenges met, the reason for choosing pure OO, and lessons learned implementing it.
Ian Bond presents the development of a trade flow event-driven architecture, providing the background of futures trade, the domain and the solution, sharing some of the lessons learned along the way.
Vaughn Vernon advocates using DDD’s strategic modeling patterns when integrating services in a RESTful SOA implementation, avoiding one of SOA’s pitfalls: focusing on services rather than the domain.
Eric Evans advocates on gradual blending of modeling and design into iterative development based on a correct and deep understanding of the domain, avoiding both “analysis paralysis” and the “easiest solution” for a user story, in an attempt to create a solution that expresses the domain and is flexible enough to support future variations of the model.
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.
Jimmy Nilsson makes a case for DDD explaining that while DDD uses some similar elements as DB-driven design does, for example, entities and repositories, the difference is in how they are used, the way the design is approached and elaborated, building on collaboration and feedback, incorporating deep domain knowledge, having as end result: reduced complexity, testability, and maintainability.
Eric discusses the need for strategic thinking an how early design decisions have major impact on the organization and the entire development process. He uses the lens of DDD Strategic Design principles (emphasizing "Context Mapping" and "Distilling the Core Domain") to show how to avoid strategic failures and achieve strategic successes. Winning strategy starts with the domain.
Eric Evans reviews what he has learned in the 5 years since the publication of Domain Driven Design - what works, what doesn't work, and how to conceptualize and describe it all. He argues that the fundamentals have held up well but there are differences in how I do things and look at things now. He also describes some new patterns and talks about changes of emphasis for existing patterns.
This presentation explores how the platform driving the guardian.co.uk, (3 time winner of the 'Best Newspaper' Webby), site was almost completely rebuilt using the principles of DDD. Key evolutions of our model, how DDD encouraged domain experts to greater iinvolvement, and how we maintained a deep, malleable domain model, whilst meeting deadlines are also discussed.