David A Good

Esoteric U.S. diplomatic license plate codes

Resources on the clean coding principles of Encapsulation and Tell, Don't Ask. TellDontAsk - Martin Fowler GetterEradicator - Martin Fowler Assertions on Domain Objects - Chris Stevenson

I recently heard of someone adding a time-based feature flag. So for example, it overrides some behavior until 2021-09-15T15:30:00.000Z, after which it is no longer effective. That's way too clever, I...

I'm sure I'm not alone, being new to Go and missing first-class support for enums. I do see there's an enum proposal for Go v2, so at least this is recognized as a shortcoming with an improvement on t...

All the common wisdom says to start with a monolith and evolve into microservices once you know you need it. So why does everyone ignore this advice and reach for microservices, even when building a s...

Example code demonstrating how to connect to locally running DynamoDB such as DynamoDB Local or LocalStack. By the way, you can run DynamoDB Local very easily like this: docker run -p 8000:8000 amazon...

I recently came across a post on Blind which was phrased like this: "From my experience, the code at XYZ top-tier tech company is garbage. So why do top-tier tech companies even bother hiring top...

I came across this post recently. The Five Orders of Ignorance are essentially: having the answer having a question

Chialisp is the native smart contract language of the Chia blockchain and cryptocurrency (XCH). This post demonstrates basic Chialisp commands, operators, and an example program. It is based on this o...

Here's how to override the size of the root volume on your AWS EC2 instance using CDK. Not at all obvious! Step 1: Check The Root Device Name Update this command with your region and AMI: aws ec2 desc...

Problem By default, Spring Boot @ConfigurationProperties doesn't fail when there are missing/unresolved environment variables defined in application properties. Instead, the property will be bound wit...

Had this idea and just getting it down on paper. Concept Your core business logic lives in containerized application, running on Kubernetes. (your org or team is not fully bought in to cloud native a...

When using Spring Cloud AWS, getting the AWS credentials and region configuration properties right can be tricky. The preferred option is to use the AWS Default Credential Provider Chain and Default R...

If you're using Spring Cloud AWS, it's likely you'll want to disable it when running locally and for @SpringBootTest integration tests. The solution depends on which version of Spring Cloud AWS you're...

Problem Brave Browser Sync is not working. Passwords, history, autofill, etc. are not being synced across devices. Solution Make sure you have customized the sync settings because the default is to sy...

A simple strategy for maintaining isolation between a DynamoDB repository layer and the rest of the application which permits a seamless transition to a different database provider

The JS GraphQL plugin for WebStorm/IntelliJ provides much needed features which don't come out of the box with these IDEs. However, Gatsby does not have a GraphQL schema file to inform the plugin. Here, I show how to introspect the Gatsby GraphQL schema using the plugin and demonstrate its schema-aware auto-completion feature.

In my first ever screencast, I show how to set up Spring Java Format using the Gradle Plugin and IntelliJ IDEA plugin.

Tips and ideas for troubleshooting Spring issues, e.g. useful packages and classes places to enable debug logging

My first post published on freeCodeCamp!

Spring is known and loved for its convention of configuration approach. But this can occasionally cause a challenge when automatically enabled features need to be disabled. Here we see how to completely disable Spring Security's HTTP security

How to transparently handle OAuth2's Client Credentials authorization grant request and subsequent token refresh requests when making service to service requests from a client to a resource server. One solution uses Spring WebFlux's WebClient together with Spring Security OAuth2 Client abstractions and is complex but highly configurable. Another solution uses OAuth2RestTemplate which is simple but not at all customizable.

Working with heterogeneous item collections with the Java SDKs can be tricky. Here we see how to handle them with the AWS SDK v2 for Java's Enhanced Client.

The AWS SDK v2 for Java's DynamoDB Enhanced Client requires setters for every attribute. Missing the setter for a given attribute may cause a misleading exception or the attribute being silently ignored.

A work in progress: open questions, lessons learned, tips, etc. from working with DynamoDB and Java

A work in progress: open questions, lessons learned, tips, etc. from working with the Java type system

A work in progress: open questions, lessons learned, tips, etc. from data modeling for DynamoDB

What I'm currently working on: personal projects, learning, open source, etc.

A running list of my favorite talks, podcast episodes, etc…

My notes from Tim Wagner's thought-provoking talk from AWS Serverless Days 2020

Based on a question I received from a former intern after I got my AWS Certified Developer - Associate certification.

React Hooks have taken the web development community by storm. Many of their benefits are well-documented. Here I talk about custom hooks as a tool for abstraction and encapsulation. Published in The Startup.

Prevent simple mistakes by sharing properties between Serverless Framework config and code.

Your apps can’t access your photos on iPhone. You’ve tried a half dozen supposed solutions but nothing works. Do not despair!

Java logging reference. Work in progress.

Clean, maintainable code is very often undervalued and underappreciated...

I had never published an NPM package, so I went through the process from start to finish and documented the steps hoping that it will help others.

Depending on your setup, adding TypeScript to your existing project might take as little as a minute or two.

TypeScript has really come of age. Type definitions are widely available, the community has grown by leaps and bounds, the productivity...

Put an end to the bloatware, McAfee AV, Dell pop-ups and reminders, etc. I was surprised that I couldn’t find a comprehensive, yet simple guide on how to do this. Hope this will help others and no doubt my future self!

I struggled with Jest at first. I wrote this after I couldn't find the solution anywhere and hoped this would help others. Now, two and a half years later, it is published in Frontend Weekly and has 48k views and 34k reads!