java-experiments

Gradle multi-module project for experiments with Java

Modules

• mongo-db-reactive-app-example
• Spring Boot 3 app with PostgreSQL cluster

Useful Java links

Open Source

• Open sourcing a library: how hard can that be? by Johan Hutting
• The Secret Life of Maven Central by Jamie Coleman

How to tune GC and performance

• Garbage Collection Tuning Guide
• Common misunderstanding of Metaspace and its sin on killing containers
• Mastering GC: tame the beast and make it your best ally
• Secrets of Performance Tuning Java
• Java Performance Puzzlers

RUS

• How we learned to use Java in Docker
• Configuring the memory of a JVM application in Kubernetes

Heap dumps

RUS

• Владимир Ситников — Разбор сложных случаев OutOfMemoryError
• Владимир Плизга — Путеводитель по анализу памяти JVM-приложений
• Владимир Ситников — Анализ дампов памяти Java-приложений

JVM internals

• Memory footprint of a Java process by Andrei Pangin
• What is Metaspace?
• What is Compressed Class Space?
• How does the default hashCode() work?

RUS

• JVM TI how to make a "plugin" for a virtual machine by Andrei Pangin
• Where do hashCode's legs grow from by Andrei Pangin

Java Core

• Method References in Java
• Type Erasure in Java Explained

RUS

• Владимир Ярославский — Удивительная история развития сортировки в JDK

ClassLoaders

• Understanding the Java Class Loader Starting from Java 9 [eng]
• How does the Java ClassLoader system actually work? [rus]

Java Modules (JPMS)

• Java Modules in Real Life

CompletableFuture

RUS

• CompletableFuture. Deep dive
• How to make CompletableFuture even faster by Sergey Kuksenko

Java Certification

• 11 Crazy Things I Didn't Know You Could Do With Java Until I Got My Java 11 Certification

JaCoCo

• Java, Code Coverage & Their Best Friend: Bytecode by Evgeny Mandrikov
• Evgeny Mandrikov, Marc Hoffmann — Java Code Coverage mechanics

Logging

• Logging Best Practices - MDC, Ingestion and Scale

Spring Boot

RUS

• Boot yourself, Spring is coming by Evgeny Borisov
• Spring Boot the Ripper by Evgeny Borisov
• The Curse of Spring Test by Evgeny Borisov

JUnit 5

• JUnit 5 Conditional Test Execution with Annotations

RUS

• Дмитрий Тучс — The art of JUnit extensions
• Дмитрий Тучс — The art of JUnit extensions 2

Maven

• Introduction to the Dependency Mechanism
• A Guide to Maven Artifact Classifiers
• What I Wish I Knew About Maven Years Ago

Gradle

RUS

• Кирилл Толкачёв — Релиз менеджмент с помощью Gradle
• Иван Осипов — Kotlin DSL: теория и практика
• Александр Белов — Gradle DSL изнутри

People management

• The Art of 1:1 Meetings — 6 Tips For Better Feedback
• Teamlead Roadmap RUS

Liquibase and Flyway

• Flyway - Squashing Migrations

PostgreSQL

• Migrating a production database without any downtime
• Optimizing Postgres for write heavy workloads ft. Checkpoint and WAL configs
• Tuning PostgreSQL for High Write Workloads
• Performance oriented Spring Data JPA & Hibernate by Maciej Walkowiak

RUS

• PostgreSQL by Vladimir Borodin
• The internal structure of PostgreSQL for practicing engineers
• Indexes in PostgreSQL. How to understand what to create
• Expensive DELETE by Nikolay Samokhvalov
• Changing the schema of PostgreSQL tables without long locks
• Дмитрий Фатов — Разгоняем вставку больших объемов данных Spring + PostgreSQL
• Сергей Синдеев, Группа «Рексофт» — Hibernate, OOM и ооочень длинные запросы
• Владимир Ситников — B-Tree индексы в базах данных на примере Spring Boot-приложений, PostgreSQL, JPA
• Михаил Жилин — Как PostgreSQL может сделать больно, когда не ожидаешь?

Column migration from int to bigint

• Column migration from INT to BIGINT in PostgreSQL [eng]
• DBA: when serial is almost over [rus]

The effect of the order of columns in tables on the size of PostgreSQL databases

• eng
• rus

Kubernetes

• You (probably) need liveness and readiness probes
• Liveness probes are dangerous
• Liveness and Readiness Probes

Load Testing

Gatling

• Write Gatling Performance Tests with Java

RUS

• Using Gatling. Introduction

Timeouts

• eng
• rus

GraphQL

RUS

• From REST to GraphQL: a 20-minute adventure

Java/Spring Platform development

• Building Spring Boot based modular libraries for 120 teams our findings
• Delving Into Spring Boot Netflix: Netflix's Application Framework
• The Magic of Platforms

IntelliJ IDEA

• IntelliJ IDEA Tips & Tricks by Anton Arhipov
• Debugging applications with IntelliJ IDEA by Anton Arhipov

RUS

• Антон Архипов — Эффективная работа с IDE(A)
• Антон Архипов - Анализ и отладка приложений в IntelliJ IDEA

Useful Kotlin links

• Public API challenges in Kotlin