If you want secure code, or code with fewer bugs, you want to track the kind of data you’re passing around. In your code, do not pass around strings or any other built-in built-in primitive type. Those are for the edges: we have to accept strings as input, we have to write VARCHAR to the …
Read moreSpring and JPA: use custom value types inside entities with a custom converter
When I’m developing on a Spring Boot app, I want to see when a request comes in, how it was authenticated, and where it was handled. By default, log levels are set to INFO. Nothing prints per-request. I don’t know a good way to get the information I need, so I turn them way up: …
^ that’s what I googled, so that’s the title of the blog post that solves it. When I added spring-boot-starter-security to my dependencies, I expected my whole app to suddenly be behind a login screen. But I expected it to work after logging in. Instead, it failed at the first form submission. And it failed …
Read moreI turned on Spring Security and my POSTs don’t work anymore
TL;DR: install docker and X410; docker run jessitron/alloy:5.1 The essential work in software development is forming a model in our heads of the system we want. The code is one expression of this model. The code can’t be stronger than this model. So I want a strong model: consistent, complete enough, and expressive. I decided …
Philly ETE has published my video on InfoQ! This is about development automation: why it’s a great idea, why we should do more of it, and how Atomist is enabling it. There is live coding, there is me getting excited, and there is an awesome sparkly dinosaur shirt. I love this shirt. I also love …
“Add a pom to my toy Scala project so I can build it with Maven” sounds simple. It is, if you do it every day. I can look it up, yet again. And get it wrong, yet again. And consult an expert with “Why doesn’t it see my Scala sources! This works fine from the …
Today’s Rug: maven executable jar this is supposed to be a rug with a jar on it. An active jar. I like being a polyglot developer, even though it’s painful sometimes. I use lots of languages, and in every one I have to look stuff up. That costs me time and concentration. Yesterday I wanted to …
or, “Everything You Never Wanted to Know About java.util.concurrent.ExecutorService But Needed To” from StrangeLoop, 18 Sep 2014 Abstract: A careful design lets you write a concurrent application without thinking about deadlock or synchronization. Getting to that design takes a lot of thinking. This session delivers the background you need to make good decisions about concurrency …
In this live video interview with screencasting, I show a bit of functional programming style in Java 8. I also rant about whether math is necessary to be a good programmer, and predict how organizational structures are changing to support learning. STLCodeCast Episode 19 My Pluralsight course on FP with Java
The other day at work, we had this problem: Sort a sequence of rows, based on an input list of columns, where each column might be sorted ascending or descending, and each column might require a transformation first to get to something comparable. The function interface looks like this: Here is a concrete example where …