🔥 Seata is an easy-to-use, high-performance, open source distributed transaction solution.

A high performance caching library for Java

QuestDB is a high performance, open-source, time-series database

Apache Pinot - A realtime distributed OLAP datastore

A production-grade java implementation of RAFT consensus algorithm.

Spring Boot starter module for gRPC framework.

Example code for the book Microservice patterns

High Performance data structures and utility methods for Java

Replicate your Key Value Store across your network, with consistency, persistance and performance.

Java rate limiting library based on token-bucket algorithm.

A distributed in-memory data store for the cloud

Open source Java implementation for Raft consensus protocol.

Performance testing of serialization and deserialization of Java JSON libraries

The AmazonDynamoDBLockClient is a general purpose distributed locking library built on top of DynamoDB. It supports both coarse-grained and fine-grained locking.

A Java version of simdjson, a high-performance JSON parser utilizing SIMD instructions

Implementation of the Raft consensus protocol in JGroups

Parallel Apache Kafka client wrapper with per message ACK, client side queueing, a simpler consumer/producer API with key concurrency and extendable non-blocking IO processing.

YouTrackDB is a general-use object-oriented graph database with storage format native to handle graph relations. YouTrackDB supports Gremlin queries and ACID transactions.

Open Source Java version of JSONata

Fast & memory efficient hash tables for Java

Commonly usable Java classes without dependencies.

Library that provides adapters for Gson JSON library