Fun with Java Records

Posted by & filed under Java.

A while back I promised to follow up from this tweet to elaborate on the fun I was having with Java’s new Records (currently preview) feature. Records, like lambdas and default methods on interfaces are tremendously useful language features because they enable many different patterns and uses beyond the obvious. Java 8 brought lambdas, with… Read more »

The benefits of making code worse

Posted by & filed under XP.

A recent twitter discussion reminded me of an interesting XTC discussion last year. The discussion topic was refactoring code to make it worse. We discussed why this happens, and what we can do about it. I found the most interesting discussion arose from the question “when might this be a good thing?”—when is it beneficial… Read more »

Reasons to hire inexperienced engineers

Posted by & filed under XP.

There are many reasons to consider hiring inexperienced software engineers into your team, beyond the commonly discussed factors of cost and social responsibility. Hire to maximise team effectiveness; not to maximise team size. Adding more people increases the communication and synchronisation overhead in the team. Growing a team has rapidly diminishing returns. However, adding the… Read more »

Do you CI?

Posted by & filed under ContinuousDelivery, XP.

When I ask ask people about their approach to continuous integration, I often hear a response like “yes of course, we have CI, we use…”. When I ask people about doing continuous integration I often hear “that wouldn’t work for us…” It seems the practice of continuous integration is still quite extreme. It’s hard, takes… Read more »

Learning from Pain

Posted by & filed under ContinuousDelivery, Java, XP.

Pain is something we generally try to avoid; pain is unpleasant, but it also serves an important purpose. Acute pain can be feedback that we need to avoid doing something harmful to our body, or protect something while it heals. Pain helps us remember the cause of injuries and adapt our behaviour to avoid a… Read more »

The unsung upsides of staying put

Posted by & filed under ContinuousDelivery, XP.

This week will be my last at Unruly; I’ll be moving on just shy of nine years from when I joined a very different company at the start of an enthralling journey. Unruly’s grown from around a dozen people when I joined to hundreds, with the tech team growing proportionally. Team growth driven by needs… Read more »

Hack Days; Removing the Rules

Posted by & filed under XP.

At Unruly we have a quarterly whole-company hack day that we call Oneruly day. Hackdays allow the whole company to focus on one thing for a day. Unlike our 20% time, which is time for individuals to work on what is most important to them, Hackdays are time for everyone to rally around a common… Read more »

End to End Tests

Posted by & filed under Java, Testing, XP.

End to end automated tests written with Webdriver have a reputation for being slow, unreliable (failing for spurious reasons), and brittle (breaking with any change). So much so that many recommend not using them. They can become a maintenance burden, making it harder, rather than easier, to make changes to the user interface. However, these… Read more »

Representing the Impractical and Impossible with JDK 10 “var”

Posted by & filed under Java.

Having benefited from “var” for many years when writing c#, I’m delighted that Java is at last getting support for local variable type inference in JDK 10. From JDK 10 instead of saying ArrayList<String> foo = new ArrayList<String>();ArrayList<String> foo = new ArrayList<String>(); we can say var foo = new ArrayList<String>();var foo = new ArrayList<String>(); and… Read more »

Gold Cards

Posted by & filed under XP.

How does your team prioritise work? Who gets to decide what is most important? What would happen if each team member just worked on what they felt like? I’ve had the opportunity to observe an experiment: over the past 8 years at Unruly, developers have had 20% of their time to work on whatever they… Read more »