Announcing openapi.tanna.dev, a client-side OpenAPI Viewer (1 mins read).
Creating a hosted version of a local and client-side only OpenAPI viewer.
Kind articles
Generating Favicons using ImageMagick on the Command-Line (1 mins read).
How to generate a multi-size favicon.ico on the command-line using ImageMagick.
by 
Jamie Tanna
.
#blogumentation
#command-line
#imagemagick.
Please Add a Relevant Publish Time to Blog Posts (2 mins read).
A request to bloggers to not use midnight as the time they publish an article.
by Jamie Tanna
.
#blogging.
Excluding Filters When using WebMvcTest (1 mins read).
How to exclude specific Filters from running when performing WebMvcTests.
by Jamie Tanna
.
#blogumentation
#java
#spring
#spring-boot
#testing
#tdd.
Capturing HTTP Requests with okhttp's MockWebServer.takeRequest (1 mins read).
How to use MockWebServer's takeRequest method to verify that HTTP request(s) are sent correctly.
by Jamie Tanna
.
#blogumentation
#java.
Integration Testing Your Spring WebClients with okhttp's MockWebServer (5 mins read).
How to write integration tests using MockWebServer with Spring Boot, for use with WebClients.
by Jamie Tanna
.
#blogumentation
#java
#spring-boot
#testing
#tdd.
Week Notes 22#05 (2 mins read).
What happened in the week of 2022-01-31?
by Jamie Tanna
.
#week-notes.
Generate Plain Old Java Objects (POJOs) from OpenAPI Model Definitions with Gradle (2 mins read).
How to generate POJOs really quickly and easily, with no manual work, using the Gradle openapi-generator Plugin.
Running Elements API Viewer to Verify Local OpenAPI/Swagger Documents (2 mins read).
How to run Elements UI locally to visualise OpenAPI documents.
I don't think you should be logging that? 😳 (12 mins read).
Common pitfalls and dangerous things that you should be watching out for in your log messages.
by Jamie Tanna
.
#blogumentation
#logs.
Validating a MockMvc Response Has No Content Type (1 mins read).
How to validate, in a MockMvc test, whether the response has no content-type nor a body.
by Jamie Tanna
.
#blogumentation
#spring
#spring-boot
#testing.
Replacing Text in Vim with the Output of a Command (1 mins read).
How to replace text under the cursor with the output of a command.
by Jamie Tanna
.
#blogumentation
#vim
#neovim
#command-line.
Integration Testing Your Spring RestTemplates with RestClientTest, using spring-test (8 mins read).
How to write integration tests using RestClientTest with Spring Boot, for use with RestTemplate and RestTemplateBuilders.
by Jamie Tanna
.
#blogumentation
#java
#spring
#spring-boot
#testing
#tdd.
Running Swagger UI to Verify Local OpenAPI/Swagger Documents (2 mins read).
How to run Swagger UI locally to visualise OpenAPI documents.
Week Notes 22#04 (3 mins read).
What happened in the week of 2022-01-24?
by Jamie Tanna
.
#week-notes.
Create Executables, not Shell Aliases or Functions (2 mins read).
Why I create standalone executable scripts instead of shell aliases or functions.
Announcing spring-content-negotiator, a Java Library for Content Negotiation with Spring (1 mins read).
Releasing a new library that can support content negotiation in Spring (Boot) applications, i.e. in Filters or ExceptionHandlers.
by Jamie Tanna
.
#spring
#spring-boot
#spring-content-negotiator
#content-negotiation.
Getting Started with jMolecules and the (Classical) Onion Architecture, with a Spring Boot project (6 mins read).
A guided example of converting a Spring Boot project to the Onion Architecture pattern.
by Jamie Tanna
.
#blogumentation
#java
#architecture
#spring-boot
#onion-architecture
#jmolecules
#archunit.
Week Notes 22#03 (4 mins read).
What happened in the week of 2022-01-17?
by Jamie Tanna
.
#week-notes.
How to Create and Unit Test Java Bean Validation Annotations (12 mins read).
A guided example through what the different type of annotation ElementTypes are, with respect to Bean Validation, and how to write unit tests for them.
by Jamie Tanna
.
#blogumentation
#java
#bean-validation
#testing
#tdd.
Codifying Your Technical / Architectural Standards with ArchUnit (7 mins read).
How to use ArchUnit to codify your technical standards to reduce code review requirements, and arrive at a more consistent codebase.
by Jamie Tanna
.
#blogumentation
#java
#archunit
#code-review.
Appending to a Querystring using Go (1 mins read).
How to append query parameters in a URL in Go.
by Jamie Tanna
.
#blogumentation
#go
#web.
Don't Just String Append to a Querystring (1 mins read).
Why you shouldn't use concatenate strings together to append to a querystring.
by Jamie Tanna
.
#web.
Simplifying Spring (Boot) ExceptionHandlers with ResponseStatus Annotations (2 mins read).
How to use annotations to drive HTTP response codes from a Spring ExceptionHandler.
by Jamie Tanna
.
#blogumentation
#java
#spring-boot
#spring.
Use SLF4J, not Log4J, as Your Logging Interface (3 mins read).
Why we should be using the interface API for logging, rather than the underlying implementation's API.
Using the Facade Pattern to More Easily Test static or Complex Classes (2 mins read).
How to use the Facade design pattern to more easily test classes that are more complex than our tests need to understand.
by Jamie Tanna
.
#java
#testing.
Mocking void methods with Mockito (1 mins read).
How to Mock a void method with Mockito, for instance to throw an exception.
Thoughts on Social Media Anonymity (4 mins read).
My thoughts on the protection of social media anonymity.
by Jamie Tanna
.
#social-media.
Content Negotiation with Servlet Filter in Spring (Boot) (3 mins read).
How to perform content-negotiation in a Servlet Filter, to serve the correct representation of error to a consumer, based on the Accept header.
by Jamie Tanna
.
#blogumentation
#java
#spring-boot
#spring
#content-negotiation.
Content Negotiation with ControllerAdvice and ExceptionHandlers in Spring (Boot) (5 mins read).
How to perform content-negotiation in a Spring ExceptionHandler, to serve the correct representation of error to a consumer, based on the Accept header.
by Jamie Tanna
.
#blogumentation
#java
#spring-boot
#spring
#content-negotiation.
Error Handling in (Spring) Servlet Filters (2 mins read).
How to return HTTP errors when a Java Servlet fails with Spring (Boot).
by Jamie Tanna
.
#blogumentation
#java
#spring-boot
#spring.
Week Notes 22#02 (4 mins read).
What happened in the week of 2022-01-10?
by Jamie Tanna
.
#week-notes.
'Knowing Me, Knowing You': Wiggly ears, custom pizzas and a burst appendix (5 mins read).
A copy of answers to the DSA's 'Knowing Me, Knowing You'.
by Jamie Tanna
.
#personal
#cddo.
Announcing uuid, a Java Library for UUID Validation (1 mins read).
Releasing a new library that can be used to validate UUIDs in Java.
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.
Week Notes 22#01 (4 mins read).
What happened in the week of 2022-01-03?
by Jamie Tanna
.
#week-notes.
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.
2021's Music In Review (5 mins read).
What music was I listening to in 2021?
by Jamie Tanna
.
#music.
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.
Week Notes 21#52 (3 mins read).
What happened in the week of 2020-12-27?
by Jamie Tanna
.
#week-notes.
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.
Week Notes 21#51 (4 mins read).
What happened in the week of 2021-12-20?
by Jamie Tanna
.
#week-notes.
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.