Jamie Tanna | Software Engineer

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 Article

JWKS-iCal Release v1.1.0: Adding Calendar Reminder (1 mins read).

Updating jwks-ical to add support for calendar reminders before the certificate's expiry.

Sun, 16 Aug 2020 11:42 by Jamie Tanna's profile image Jamie Tanna . #jwks #certificates #jwks-ical #calendar.

 Article

Connecting to the Docker Host from a Child Container (2 mins read).

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How to access ports from the host machine when running in a child container.

Sat, 15 Aug 2020 15:19 by Jamie Tanna's profile image Jamie Tanna . #blogumentation #docker.

 Article

How to Manually Trigger JSR380 Bean Validation on a Class (2 mins read).

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How to perform validation on a class using JSR380, when not using a framework like Spring Boot.

Thu, 06 Aug 2020 10:47 by Jamie Tanna's profile image Jamie Tanna . #blogumentation #java #jsr380 #bean-validation.

 Article

Configure Gradle to Allow Listing All Subproject Dependencies (1 mins read).

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How to set Gradle configuration globally to add a task to list all your dependencies.

Mon, 27 Jul 2020 13:14 by Jamie Tanna's profile image Jamie Tanna . #blogumentation #gradle #java.

 Article

Configure Gradle to Configure Tasks Globally with an initscript (1 mins read).

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How to use Gradle's initialization scripts to globally configure tasks across all of your projects.

Mon, 27 Jul 2020 13:14 by Jamie Tanna's profile image Jamie Tanna . #blogumentation #gradle #java.

 Article

Capital One Promotion Celebrations (2 mins read).

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Reflecting on the fun of today's promotion announcements session.

Wed, 15 Jul 2020 13:52 by Jamie Tanna's profile image Jamie Tanna . #capital-one #job.

 Article

New Job Title, Who Dis? (1 mins read).

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Moving into the world of being a Tech Lead.

Thu, 09 Jul 2020 10:04 by Jamie Tanna's profile image Jamie Tanna . #personal #job.

 Article

Spring Boot: 'junit-vintage' failed to discover tests When Using Only JUnit5 Tests (2 mins read).

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How to avoid the error 'junit-vintage' failed to discover tests when using Spring Boot.

Tue, 30 Jun 2020 21:24 by Jamie Tanna's profile image Jamie Tanna . #blogumentation #spring-boot #java #junit.

 Article

Creating My Own Personal Micropub Client (3 mins read).

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Announcing my own personal Micropub client to publish content that is very specific to my workflows.

Sun, 28 Jun 2020 21:08 by Jamie Tanna's profile image Jamie Tanna . #www.jvt.me #micropub.

 Article

Generating Random Bytes On the Command Line with OpenSSL (1 mins read).

How to generate random bytes as binary, base64 or hex, using openssl on the command-line.

Sat, 27 Jun 2020 14:50 by Jamie Tanna's profile image Jamie Tanna . #blogumentation #openssl #command-line.

 Article

Using @Mock as a Method Parameter with Mockito (2 mins read).

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Using @Mock on method parameters to reduce manual mock setups with Mockito.

Sat, 27 Jun 2020 14:21 by Jamie Tanna's profile image Jamie Tanna . #blogumentation #java #mockito.

 Article

Converting a Byte Array to a String in Ruby (1 mins read).

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How to convert an array of bytes to a String with Ruby.

Tue, 23 Jun 2020 13:24 by Jamie Tanna's profile image Jamie Tanna . #blogumentation #ruby.

 Article

Disabling the logging of Spring Security's Default Security Password (2 mins read).

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How to disable Spring Boot logging the generated security password.

Fri, 19 Jun 2020 17:04 by Jamie Tanna's profile image Jamie Tanna . #blogumentation #spring-boot #spring-security.

 Article

Changing my Static Site Search Setup (1 mins read).

Making changes to fix my search setup, and reduce download overhead for visitors.

Wed, 17 Jun 2020 19:49 by Jamie Tanna's profile image Jamie Tanna . #search #www.jvt.me.

 Article

Generating the Client Assertion JWT for private_key_jwt Authentication with Ruby (1 mins read).

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A helper script to generate the client assertion required to authenticate to an Authorization Server that supports private_key_jwt, on the command-line with Ruby.

Mon, 15 Jun 2020 23:12 by Jamie Tanna's profile image Jamie Tanna . #blogumentation #ruby #command-line #jwt #json #oidc.

 Article

Verifying Signed JWTs (JWS) with Ruby (2 mins read).

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Using the ruby-jwt library to verify a signed JSON Web Token (JWS) on the command-line.

Mon, 15 Jun 2020 22:59 by Jamie Tanna's profile image Jamie Tanna . #blogumentation #ruby #command-line #jwt #json.

 Article

Creating Signed JWTs (JWS) with Ruby (1 mins read).

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Using the json-jwt and ruby-jwt libraries to sign a JSON Web Token on the command-line.

Mon, 15 Jun 2020 22:40 by Jamie Tanna's profile image Jamie Tanna . #blogumentation #ruby #command-line #jwt #json.

 Article

Issues with Ordering When Using Vault CLI's -no-print Argument (1 mins read).

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A possible solution for no-print not taking effect with the vault CLI when using AWS EC2 auth.

Mon, 15 Jun 2020 10:59 by Jamie Tanna's profile image Jamie Tanna . #blogumentation #vault #aws.

 Article

Keeping Track of Certificate Expiry with a JWKS to iCalendar Converter (4 mins read).

Creating an iCalendar feed for certificate expiry details, given a URI for a JSON Web Key Set.

Sun, 14 Jun 2020 22:14 by Jamie Tanna's profile image Jamie Tanna . #java #jwks #certificates #jwks-ical #calendar #google-cloud #serverless.

 Article

New CSS, Who Dis? (2 mins read).

Announcing my new site design, based on Hack.css.

Thu, 11 Jun 2020 19:37 by Jamie Tanna's profile image Jamie Tanna . #www.jvt.me #css.

 Article

Review: mycookiedough Delivery (2 mins read).

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Reviewing our first mycookiedough delivery, and the corresponding sugar rush that came with it.

Sun, 07 Jun 2020 22:07 by Jamie Tanna's profile image Jamie Tanna . #food #review.

 Article

GitLab CI Shell Executor failing builds with ERROR: Job failed: exit status 1 (1 mins read).

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How to work around ERROR: Job failed: exit status 1 errors with GitLab CI's shell executor.

Wed, 03 Jun 2020 21:13 by Jamie Tanna's profile image Jamie Tanna . #blogumentation #gitlab-ci.

 Article

GitLab CI Shell Executor Failing Builds With No Such Directory (1 mins read).

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How to work around No Such Directory errors with GitLab CI's shell executor.

Wed, 03 Jun 2020 21:13 by Jamie Tanna's profile image Jamie Tanna . #blogumentation #gitlab-ci.

 Article

Deploying a Branch to Netlify on the Command-Line (1 mins read).

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How to use Netlify's Node CLI to deploy a given branch to Netlify.

Wed, 03 Jun 2020 19:40 by Jamie Tanna's profile image Jamie Tanna . #blogumentation #netlify #netlify-cli.

 Article

Generating JWK Thumbprints with Ruby (1 mins read).

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How to generate JWK thumbprints with Ruby.

Wed, 03 Jun 2020 09:00 by Jamie Tanna's profile image Jamie Tanna . #blogumentation #ruby #jwk.

 Article

Generating JWK Thumbprints with Node.JS (1 mins read).

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How to generate JWK thumbprints with Node.JS.

Tue, 02 Jun 2020 22:34 by Jamie Tanna's profile image Jamie Tanna . #blogumentation #nodejs #jwk.

 Article

How are Open Banking Key Ids (kid) Generated? (1 mins read).

Sharing insight into how Open Banking has generated their kids for use with JWTs.

Tue, 02 Jun 2020 13:28 by Jamie Tanna's profile image Jamie Tanna . #blogumentation #open-banking #psd2.

 Article

How to Run Java on the Command-Line to Attach a Debugger (1 mins read).

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How to run java on the command-line, and make it possible to attach a debugger.

Fri, 29 May 2020 23:15 by Jamie Tanna's profile image Jamie Tanna . #blogumentation #java #command-line.

 Article

Extract a Public Cert from a Java Keystore/Truststore (1 mins read).

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How to export the public certificate from a Java keystore.

Fri, 29 May 2020 22:07 by Jamie Tanna's profile image Jamie Tanna . #blogumentation #java #keystore #certificates.

 Article

Evicting Spring Cache on a Schedule (1 mins read).

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How to evict Spring Cache's @Cacheable data on a schedule.

Fri, 29 May 2020 10:20 by Jamie Tanna's profile image Jamie Tanna . #blogumentation #java #spring #spring-cache.

 Article

No default controller available With bluetoothctl (1 mins read).

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One possible solution for the No default controller available error message with bluetoothctl.

Thu, 28 May 2020 18:09 by Jamie Tanna's profile image Jamie Tanna . #blogumentation #bluetoothctl.

 Article

Migrating to Netlify's Deployments from GitLab CI (3 mins read).

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Moving to avoid flaky deployments, and trying to reduce deployment times.

Wed, 27 May 2020 19:18 by Jamie Tanna's profile image Jamie Tanna . #gitlab-ci #netlify #www.jvt.me.

 Article

How to avoid HttpMessageNotReadableException when using ContentCachingRequestWrapper with Java Servlet Filters (1 mins read).

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How to avoid receiving Required request body is missing errors when using a ContentCachingRequestWrapper.

Mon, 25 May 2020 19:56 by Jamie Tanna's profile image Jamie Tanna . #blogumentation #java #spring #servlet.

 Article

Reading a Servlet/Spring Request Body Multiple Times (2 mins read).

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How to read the request body more than once using Java Servlet Filters.

Mon, 25 May 2020 19:56 by Jamie Tanna's profile image Jamie Tanna . #blogumentation #java #spring #servlet.

 Article

Disabling @Valid Annotation in a Spring Integration Test (1 mins read).

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How to disable @Valid validation in Spring Integration Tests.

Mon, 18 May 2020 19:44 by Jamie Tanna's profile image Jamie Tanna . #blogumentation #java #spring #spring-boot #jsr380 #bean-validation.

 Article

Converting Output from Rest Assured to Curl Requests (3 mins read).

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How to convert the log output from Rest Assured to a curl request.

Mon, 18 May 2020 13:11 by Jamie Tanna's profile image Jamie Tanna . #blogumentation #rest-assured #command-line.

 Article

Navigating through the Vim Changelist with Intellij (2 mins read).

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How to use g; and g, using IntelliJ's IdeaVim plugin to cycle through changes in a file.

Fri, 15 May 2020 23:48 by Jamie Tanna's profile image Jamie Tanna . #blogumentation #intellij #vim #ideavim.

 Article

Running Spotless Automagically with Gradle (2 mins read).

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How to set Gradle configuration globally to always run spotlessApply in your projects.

Fri, 15 May 2020 16:54 by Jamie Tanna's profile image Jamie Tanna . #blogumentation #gradle #spotless #java.

 Article

Rendering Micropub Client Data on Posts (2 mins read).

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Sharing more information about Micropub clients that have created a post, if possible.

Wed, 13 May 2020 13:42 by Jamie Tanna's profile image Jamie Tanna . #www.jvt.me #indieweb #micropub #microformats.

 Article

Changing the Structure of Homebrew Website Club Nottingham (3 mins read).

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Looking to change the format of Homebrew Website Club Nottingham so it works better as a remote event.

Sun, 10 May 2020 18:04 by Jamie Tanna's profile image Jamie Tanna . #homebrew-website-club-nottingham.

 Article

Gotcha: AWS SDK Proxy Setup with Test Kitchen (2 mins read).

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How to avoid odd proxy issues when using the AWS SDK, when using Test Kitchen.

Wed, 06 May 2020 14:42 by Jamie Tanna's profile image Jamie Tanna . #blogumentation #chef #test-kitchen #proxy.

 Article

Determining What Motherboard You're Using, On Linux (1 mins read).

How to determine what motherboard the machine you're using is reporting, on the command-line with Linux.

Tue, 05 May 2020 08:38 by Jamie Tanna's profile image Jamie Tanna . #blogumentation #command-line #linux.

 Article

Creating a 'Firehose' Feed (2 mins read).

Splitting out my content feeds, so it's (hopefully) more applicable and less noisy for consumers.

Mon, 04 May 2020 08:29 by Jamie Tanna's profile image Jamie Tanna . #www.jvt.me #indieweb #feed #hugo.

 Article

Extracting x5cs from a JSON Web Key Set (JWKS) to PEM files with Ruby (1 mins read).

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How to extract the full chain of certificates from a JWKS' x5c parameter to files.

Thu, 30 Apr 2020 21:30 by Jamie Tanna's profile image Jamie Tanna . #blogumentation #jwks #certificates #ruby.

 Article

Autogenerating the Date Header in Postman (1 mins read).

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How to generate and send a Date header using Postman.

Wed, 29 Apr 2020 18:02 by Jamie Tanna's profile image Jamie Tanna . #blogumentation #postman.

 Article

New Desk/Office Setup (6 mins read).

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Sharing the new layout for our office, and my new desk setup with my new Dell UltraSharp.

Sun, 26 Apr 2020 13:00 by Jamie Tanna's profile image Jamie Tanna . #personal #battlestations #coronavirus.

 Article

Converting a Byte Array to String with Buffer in Node.JS (1 mins read).

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How to convert an array of bytes to a String using Node.JS's Buffer class.

Mon, 20 Apr 2020 16:51 by Jamie Tanna's profile image Jamie Tanna . #blogumentation #nodejs.

 Article

GitLab Runner Docker TCP Error (2 mins read).

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Fixing the cannot connect to the Docker daemon error with GitLab Runner and Docker.

Tue, 14 Apr 2020 21:29 by Jamie Tanna's profile image Jamie Tanna . #blogumentation #gitlab #docker.

 Article

Inheriting the Proxy from the Jenkins Host in Docker (1 mins read).

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How to pass proxy variables from your Jenkins host to your Docker containers.

Tue, 14 Apr 2020 13:09 by Jamie Tanna's profile image Jamie Tanna . #blogumentation #docker #jenkins #proxy.

 Article

Inheriting the Environment Variables from the Jenkins Host in Docker (2 mins read).

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How to pass environment variables from your Jenkins host to your Docker containers.

Tue, 14 Apr 2020 13:09 by Jamie Tanna's profile image Jamie Tanna . #blogumentation #docker #jenkins.

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Want to get in touch? Drop me an email at  hi@jamietanna.co.uk. I try to get back to everything, if I don't reply in a couple of weeks, feel free to give me a nudge!

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© 2025 Jamie Tanna. Post content and code snippets licensing is detailed on respective pages, otherwise default to Creative Commons Attribution Non Commercial Share Alike 4.0 International and Apache License 2.0.
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