Jeremy Davis
Jeremy Davis
Sitecore, C# and web development
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Posts tagged Design Patterns

Driving browsers: #3 The states

Because sometimes reinventing the wheel is fun!

Time for the final part of my series on controlling a web browser. With code to load a browser, and the overarching State Machine to control it, this part finishes off with the code for some states to load a page and extract its markup. Plus a few conclusions...

Driving browsers: #2 The state machine

Because sometimes reinventing the wheel is fun!

Continuing from my previous post about firing up a browser in order to automate it, this post moves on to the overall pattern for how the browser can be controlled.

A second pass at async pipelines

Last time out I was looking at applying async/await patterns to some pipeline patterns for C#. After I came up with the initial solution I outlined in that post, there was some more back-and-forth in the discussion thread that prompted all this. And that discussion made me realise there was an interesting side effect of the code I wrote, which might lead to some confusing bugs. So back to the drawing board...

C# Design Patterns ~4 min. read

Thinking about errors in code pipelines

A while back I wrote a couple of posts on the subject of how code pipelines can work in a more functional .Net world. I've made use of those patterns in some code of my own, and I've found these posts have generated quite a lot of questions from readers here and followers on twitter. But I've never been quite happy with the implementation in my own code...

C# Design Patterns ~5 min. read

Getting pipelines from config

In my last post I was thinking about a more functional approach to defining pipelines, after having heard about some interesting new code that Sitecore had been working on. Since writing that I've had a few conversations where the topic "but what about if I want a pipeline to come from configuration?" has come up. I've been away from work for the last week doing my civic duty on Jury Service, but I've had some time in between court sessions that I've spent thinking about how last weeks ideas and configuration files might be combined.

So here's one way it could work:

C# Design Patterns ~5 min. read

An alternative approach to pipelines

There was a lot of exciting new stuff on show at the Sitecore's recent MVP Summit and Symposium the other week. Plenty of others have written up the general goings on at those events (have a google – there's lots to read), so I thought I'd focus on something more specific that piqued my interest: the novel approach that's being taken to pipelines in some of the new code Sitecore are producing.

C# Design Patterns ~5 min. read