光 HikariCP・A solid, high-performance, JDBC connection pool at last.

ANTLR (ANother Tool for Language Recognition) is a powerful parser generator for reading, processing, executing, or translating structured text or binary files.

Vert.x is a tool-kit for building reactive applications on the JVM

configuration library for JVM languages using HOCON files

vʌvr (formerly called Javaslang) is a non-commercial, non-profit object-functional library that runs with Java 8+. It aims to reduce the lines of code and increase code quality.

Simple OAuth library for Java

Fibers, Channels and Actors for the JVM

"Maven-node-grunt-gulp-npm-node-plugin to end all maven-node-grunt-gulp-npm-plugins." A Maven plugin that downloads/installs Node and NPM locally, runs NPM install, Grunt, Gulp and/or Karma.

Awaitility is a small Java DSL for synchronizing asynchronous operations

Maestro: Netflix’s Workflow Orchestrator

Vert.x examples

Java annotation processor to create immutable objects and builders. Sweeps boilerplate code under the rug since 2013!

AI constraint solver in Java to optimize the vehicle routing problem, employee rostering, task assignment, maintenance scheduling, conference scheduling and other planning problems.

An extremely easy way to perform background processing in Java. Backed by persistent storage. Open and free for commercial use.

Getting Started withg Spring Security OAuth:

Functional programming in Java

Persistent cluster-friendly scheduler for Java

Simple API, Complex Emails (Jakarta Mail smtp wrapper)

sql2o is a small library, which makes it easy to convert the result of your sql-statements into objects. No resultset hacking required. Kind of like an orm, but without the sql-generation capabilit…

EvalEx is a handy expression evaluator for Java, that allows to evaluate simple mathematical and boolean expressions.

Payara Server is an open source middleware platform that supports reliable and secure deployments of Java EE (Jakarta EE) and MicroProfile applications in any environment: on premise, in the cloud …

Efficient execution and functional composition of database calls using jdbc and RxJava Observables

An RFC 6902 (JSON Patch) and reverse, plus RFC 7386 (JSON Merge Patch), implementation in Java using Jackson (2.2.x)

Extension for Jackson JSON processor that adds support for serializing POJOs as XML (and deserializing from XML) as an alternative to JSON

Hazelcast Code Samples

A java library for implementing Time-based One Time Passwords for Multi-Factor Authentication.

RxJava2 integration with JDBC including Non-blocking Connection Pools

Advanced Java BigDecimal math functions (pow, sqrt, log, sin, ...) using arbitrary precision.

Authorization Server Implementation in Java supporting OAuth 2.0 & OpenID Connect

In this article, we will be creating a sample REST CRUD APIs and provide JWT role based authorization using spring security to these APIs. We will be using spring boot 2.0 and JWT 0.9.0. In the DB,…