Validating UUIDs with Regular Expressions in Java (1 mins read).
How to validate UUIDs and UUIDv4s in Java with a regex.
Auditing with Spring Boot Actuator (9 mins read).
How to use Spring Boot Actuator for your audit and business event logging needs.
by 
Jamie Tanna
.
#blogumentation
#java
#spring-boot
#spring-security
#logs.
Returning a Value, or a Default, From a Java Optional (1 mins read).
How to replace imperative code with a functional style, when returning a default value for a Java Optional.
by Jamie Tanna
.
#blogumentation
#java.
Building an Automagically Updating Personal README for GitLab and GitHub (2 mins read).
Announcing the publishing of readme.jvt.me as well as automagically updating READMEs in my GitLab and GitHub profiles.
by Jamie Tanna
.
#go
#github
#gitlab
#readme.jvt.me
#microformats2.
Adding both an ObjectMapper and a YAMLMapper to Spring Boot (2 mins read).
How to have an ObjectMapper and a YAMLMapper coexisting in a Spring Boot project's bean dependencies.
by Jamie Tanna
.
#blogumentation
#java
#jackson
#spring-boot.
Testing Data Serialisation/Deserialization in Java (with Gson) (3 mins read).
How to validate your JSON types correctly serialise/deserialise when using the Gson library.
Improving Life-Work Balance on GitHub using per-Organisation Notification Settings (2 mins read).
How to set up per-organisation notification settings so your personal email doesn't get work-related notifications.
by Jamie Tanna
.
#blogumentation
#github
#life-work-balance.
Publishing to Maven Repositories with GitLab CI, with Signed Artefacts (4 mins read).
How to publish signed artefacts from a Gradle build to Maven repositories (such as Maven Central) when using GitLab CI.
by Jamie Tanna
.
#blogumentation
#gradle
#java
#gitlab-ci
#gpg.
Suppressing No pinentry warnings with GPG (in Automated Builds) (1 mins read).
How to get avoid No pinentry warnings when running GPG in automated build environments like CI/CD.
by Jamie Tanna
.
#blogumentation
#gpg.
Gotcha: PicoContainer requires Zero-Argument Constructors (2 mins read).
A little gotcha around using PicoContainer (with Cucumber) where it may not be usable unless you have zero-arg constructors.
by Jamie Tanna
.
#blogumentation
#java
#cucumber
#picocontainer.
Using Dagger for Dependency Injection with Cucumber Tests (4 mins read).
How and why to add Dagger for your Cucumber tests' dependency injection.
Publishing a NPM Package to npmjs.com from GitLab CI (1 mins read).
How to publish an NPM package to the public NPM registry, using GitLab CI.
Announcing a new package: @jamietanna/spectral-test-harness (1 mins read).
Announcing a new NPM package for easier testing of Spectral API linting.
by Jamie Tanna
.
#spectral-test-harness
#api
#unit-testing
#testing
#javascript
#nodejs.
Test Driven Development for Your Spectral Rules, using Jest (7 mins read).
How to write unit tests for Spectral API linting, in a test-driven development fashion.
by Jamie Tanna
.
#blogumentation
#spectral-test-harness
#spectral
#api
#unit-testing
#testing
#javascript
#nodejs
#tdd.
Autowiring your controllers automagically when using MockMVC and Spring Cloud Contract (2 mins read).
How to automagically set up your Spring controllers when using MockMVC with Spring Cloud Contract.
by Jamie Tanna
.
#blogumentation
#spring
#spring-boot
#spring-cloud-contract.
Decompiling Java Class Files On the Command-Line (2 mins read).
How to use the Fernflower decompiler on the command-line to decompile compiled Java classes.
by Jamie Tanna
.
#blogumentation
#java.
Validating a Spring (Boot) Response Matches JSON Schema with MockMVC (3 mins read).
How to perform JSON Schema validation for a Spring (Boot) service's response when testing using MockMVC.
by Jamie Tanna
.
#blogumentation
#spring
#spring-boot
#java
#json-schema.
Retrieving All Dependencies Required by a JAR at Runtime (3 mins read).
How to handily retrieve the full runtime classpath required for a JAR file, using Gradle.
Use a (JSON) Schema for the Interface Portion of your RESTful API (3 mins read).
Why you should be using a well-defined (JSON) Schema for the data classes that your API consumers will need to utilise.
by Jamie Tanna
.
#api
#json-schema
#rest.
Getting the Date from a Week Number in Java (1 mins read).
How to get the date from a week number and year in Java.
by Jamie Tanna
.
#blogumentation
#java.
Debugging Chef Variables With Logs (3 mins read).
How you can use different means of logging to make operations with Chef cookbook a little easier.
by Jamie Tanna
.
#blogumentation
#chef.
Getting the Battery Status of a Bluetooth Device on Linux (1 mins read).
How to use dbus-send to retrieve the percentage of battery left on a Bluetooth device on Linux.
by Jamie Tanna
.
#blogumentation
#command-line
#bluetooth
#linux.
Converting a Kitchen YAML to Chef Attributes (2 mins read).
How to convert attributes being set for your Chef Test Kitchen integration tests to an attributes.rb format.
Using systemd-tmpfiles to manage temporary files and directories (2 mins read).
How I'm using systemd-tmpfiles to manage a temporary working directory and automagically clean it out.
Should That (Secret) Thing Be In Your Querystring? (2 mins read).
Why you should be very cautious about putting potentially sensitive values into the querystring of web APIs.
by Jamie Tanna
.
#api
#security.
Owning my Hashtags (2 mins read).
Why I decided to treat hashtags in my (syndicated) content as tags on my site.
by Jamie Tanna
.
#indieweb.
Extracting the Default Private / Secret Keys from OpenAM/Forgerock AM (2 mins read).
How to retrieve the contents of the private or secret keys from an OpenAM/Forgerock AM installation.
Converting an Image to a Base64 data URL with Node.JS (1 mins read).
How to convert an image to a data URL using Node.JS on the command-line.
Appending Values to a Querystring with Ruby (1 mins read).
How to append a query parameter to a URL's querystring in Ruby.
by Jamie Tanna
.
#blogumentation
#ruby.
Making Zoom Notifications/Windows Float on BSPWM (1 mins read).
How to get BSPWM to handle Zoom notification windows as floating windows, instead of tiles.
Automagically Assuming AWS Roles for EC2/ECS (1 mins read).
How to set up your AWS infrastructure to automagically assume IAM roles.
by Jamie Tanna
.
#blogumentation
#aws.
Reducing Risk of Supply Chain Attacks with Reproducible Builds in Gradle (1 mins read).
How to enable Gradle's reproducible builds functionality to allow others to verify your released libraries don't contain uncommitted, malicious code.
Packaging Wiremock Stubs into a Standalone JAR (2 mins read).
How to use Gradle to package a standalone JAR for Wiremock, including any stubs needed.
Testing Data Serialisation/Deserialization in Java (with Moshi) (3 mins read).
How to validate your JSON types correctly serialise/deserialise when using the Moshi library.
Generate Plain Old Java Objects (POJOs) from JSON Schema Definitions with Gradle (3 mins read).
How to generate POJOs really quickly and easily, with no manual work, using the Gradle jsonschema2pojo Plugin.
by Jamie Tanna
.
#blogumentation
#gradle
#java
#json-schema.
Shift Your Testing Left with Spring Boot Controllers (5 mins read).
How to break down your tests for Spring Boot controllers, which could be used when performing Test Driven Development.
by Jamie Tanna
.
#java
#testing
#tdd
#spring-boot.
Generate Plain Old Java Objects (POJOs) from XML Schema Definitions with Gradle (1 mins read).
How to generate POJOs really quickly and easily, with no manual work, using the Gradle XJC Plugin.
Use (End-to-End) Tracing or Correlation IDs (4 mins read).
Why you should be requesting, and logging, a unique identifier per request for better supportability.
by Jamie Tanna
.
#production
#incident-management
#supportability.
Determining the Version Of Libraries Packaged into the Java AWS Lambda Runtime (3 mins read).
How to determine what libraries, and their respective versions, are packaged into AWS Lambda.
by Jamie Tanna
.
#blogumentation
#java
#aws
#aws-lambda
#serverless.
Lessons Learned from Running Java in Serverless Environments like AWS Lambda (10 mins read).
Some recommendations for running Java as a Serverless application language, for instance on AWS Lambda or Google Cloud Functions.
by Jamie Tanna
.
#java
#aws
#aws-lambda
#serverless
#google-cloud.
Generating Dynamic Identifiers with Thymeleaf (1 mins read).
How to generate a dynamic ids for elements in Thymeleaf.
Controlling the Linux Backlight via the Command-Line (1 mins read).
How to manage your screen backlight on the command-line, without installing any tools.
Make Your RSS Feed Discoverable (1 mins read).
Why and how you should make it possible to automagically discover your feed(s).
by Jamie Tanna
.
#blogumentation
#rss
#feed.
Why You Should Avoid using Client Secret Authentication for OAuth2 Client Credentials (7 mins read).
Why I recommend against using client secret authentication for OAuth2 and OpenID Connect APIs.
by Jamie Tanna
.
#oauth
#oauth2
#oidc
#security.
Running a Java WAR File on the Command-Line (2 mins read).
How to run a WAR file locally, using Jetty, without installing anything.
by Jamie Tanna
.
#blogumentation
#java
#war.
Querying and Interacting with CSV Files More Easily with SQLite (1 mins read).
How to use sqlite3 to parse and query comma-separated value files.
How We Built a Team with a High Net Promoter Score (23 mins read).
Sharing the "Secret Sauce" of why the Purple Pandas was a team that was highly effective, and had a high NPS, too.
by Jamie Tanna
.
#capital-one
#job
#communication
#diversity-and-inclusion.
Creating More Descriptive and Fluent Assertion Helpers (4 mins read).
How to improve test readability, and developer experience, using assertion helpers.
by Jamie Tanna
.
#blogumentation
#testing
#java
#ruby
#rspec
#assertj.
Using Middleman Redirects with a Custom, Non-HTML Content Type (2 mins read).
How to get Middleman's redirect to work with files that are not HTML.
Improving Team Efficiency By Measuring and Improving Code Review Cycle Time (9 mins read).
How measuring how long code review took as a team lead to being able to change our processes, and then deliver much more effectively.