Paul M. Jones | Action Domain Responder2026-05-08T09:12:58-05:00Contra Noback on Application Services2022-12-09T16:37:32-06:00Matthias Noback's Advanced Web Application Architecture (AWAA from here on) is excellent throughout. You should buy it and heed its advice. It is a wonderful companion or followup to my own Modernizing Legacy Applications in PHP -- which is still fre...DDD, Authentication, and Credential Exchange2021-03-02T09:20:33-06:00In a typical DDD layered architecture, the Application layer will almost
always need to know who is using it, even if only to help determine
authorization. This is not a problem of authentication per se. Instead, it is a
problem of taking the identif...Application and Domain Service Naming Conventions2020-12-07T11:12:52-06:00In which a correspondent asks about Application Services, Domain Services, and the interactions between them.
I.
The word "service" is everywhere in my codebase. Can you suggest a naming convention, or directory structure, or other advice, regarding...Clarifications to a review of Action Domain Responder2018-12-19T09:30:04-06:00Herberto Graça, as part of his Software Architecture Chronicles, saw fit to review the Action-Domain-Responder pattern that I have written so much about. It’s a good writeup, and you should read the whole thing, but it is off in a couple of plac...Solving The "Widget Problem" In ADR2017-12-28T10:15:42-06:00The “widget problem” is when you have several panels or content areas on an HTML page that have different data sources. You might have a main content area, then a calendar off to the side, with perhaps a list of recent news items or blog posts, a...Slim and Action-Domain-Responder2017-08-22T11:59:01-05:00I’ve had a warm place in my heart for Slim for a long time, and especially so since recognizing the Action-Domain-Responder pattern. In this post, I’ll show how to refactor the Slim tutorial application to ADR.
One nice thing about Slim (and most...Why MVC doesn't fit the web2017-08-18T09:49:07-05:00[MVC is] a particular way to break up the responsibilities of parts of a graphical user interface application. One of the prototypical examples is a CAD application: models are the objects being drawn, in the abstract: models of mechanical parts, arc...The "Micro" Framework As "User Interface" Framework2017-08-15T13:38:01-05:00(The following is more exploratory than prescriptive. My thoughts on this topic are incomplete and in-progress. Please try to treat it accordingly.)
tl;dr: “Micro” frameworks are better described as “user interface” frameworks; perhaps there...Domain Logic and Email Templates2017-07-18T07:00:42-05:00From an email conversation with a reader:
Hi Paul,
I’ve been following your writing and examples about the ADR pattern for some time now. It’s taken me awhile to wrap my head around it but ADR has really added a lot of structure to my code and I...Controllers and Domain Exceptions2017-05-23T07:00:13-05:00A few months ago I had a great email conversation with a correspondent about how to handle business logic exceptions in his controller code. His message follows, lightly edited for brevity and clarity:
I think controller has single responsibility - ...