kjivan

Unfortunately Oracle databases aren’t compatible with the new Apple Silicon CPU architecture. Due to this fact you’re not able to run an Oracle XE image with TestContainers on your brand-new MacBook, but there’s a workaround!

TLDR;

Install colima

Run colima start --arch x86_64 --memory 4

Set TestContainers env vars

kjivan

Spring Boot Debugging

Enable actuators and values

management.endpoints.web.exposure.include=*
management.endpoint.env.show-values=ALWAYS

Enable SQL Logging

kjivan

Feature Implementation Best Practices

kjivan

Debugging Best Practices

Preparation

• Establish a clear understanding of the issue
  • Ask issue reporter/lead about issue if needed
• Reproduce the issue
  • Is it a workflow that is causing the issue
  • Is it particular data that is causing the issue
  • Is it a combination of the above
• Is there a timing issue or a race condition issue

kjivan

Error Handling Best Practices

• System Errors
  • eg null pointers/failed db query/failed api calls
  • Log this at the error level
  • Log stack trace if possible
  • Log any relevant identifiers if possible
  • Don't log any unapproved sensitive data
• User errors
• eg invalid zip code/name length

kjivan

Logging Best Practices

This assumes you have a fast memory logging system.

Use 4 logging levels

• error - Log critical system errors only (not user errors)
• warn - Log things that are potential errors or can become errors
• info(default) - Logs info about events in the system
• debug - Log more detailed info about debugging

kjivan

name: Pipeline
on:
  push:

jobs:
  log-json:
    name: Run test command & log github json
    runs-on:
      - self-hosted
    steps:

kjivan

Lombok Best Practices

Entities

• Do not use @Data and @EqualsAndHashCode
• Use @Getter and @Setter
• Don't forget to exclude lazy attributes if you use @ToString
• Don't forget to add @NoArgsConstructor if you use @Builder or @FullArgsConstructor or @RequiredArgsConstructor
• Explanation for rules above: Lombok and JPA: What may go wrong?
• Use @Builder if setting lots of different fields

kjivan

Flaky Test Loop

for i in {1..10}; do
   ./gradlew integrationTest || {echo "Failed after $i attempts" && break}
done

kjivan

Github Actions

Running github actions repeatedly

gc -m "Whatever" -a; \
gp; \
gh pr create --fill; \
gh pr merge -m