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29 stars written in Java
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Mirror of Apache Kafka

Java 31,698 14,892 Updated Jan 12, 2026

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

Java 16,548 1,528 Updated Jan 13, 2026

Change data capture for a variety of databases. Please log issues at https://github.com/debezium/dbz/issues.

Java 12,280 2,822 Updated Jan 9, 2026

The Metadata Platform for your Data and AI Stack

Java 11,424 3,332 Updated Jan 13, 2026

The world's fastest open query engine for sub-second analytics both on and off the data lakehouse. With the flexibility to support nearly any scenario, StarRocks provides best-in-class performance …

Java 11,251 2,256 Updated Jan 12, 2026

SeaTunnel is a multimodal, high-performance, distributed, massive data integration tool.

Java 9,040 2,153 Updated Jan 12, 2026

Apache Beam is a unified programming model for Batch and Streaming data processing.

Java 8,444 4,478 Updated Jan 12, 2026

Apache Iceberg

Java 8,421 2,959 Updated Jan 12, 2026

A tool for mocking HTTP services

Java 7,097 1,493 Updated Jan 12, 2026

configuration library for JVM languages using HOCON files

Java 6,287 977 Updated Sep 11, 2025

Lightweight Java and Android library for integration with Ethereum clients

Java 5,376 1,771 Updated Nov 12, 2025

A process for collecting metrics using JMX MBeans for Prometheus consumption

Java 3,272 1,224 Updated Jan 8, 2026

Apache Paimon is a lake format that enables building a Realtime Lakehouse Architecture with Flink and Spark for both streaming and batch operations.

Java 3,156 1,249 Updated Jan 13, 2026

MATURE: A set of Maven tools for dealing with Dockerfiles

Java 2,745 483 Updated Feb 1, 2022

The official AWS SDK for Java - Version 2

Java 2,525 974 Updated Jan 13, 2026

Confluent Schema Registry for Kafka

Java 2,394 1,152 Updated Jan 13, 2026

ZooKeeper client wrapper and rich ZooKeeper framework

Java 2,139 430 Updated Mar 24, 2023

Secor is a service implementing Kafka log persistence

Java 1,853 533 Updated Jan 5, 2026

Apache Polaris, the interoperable, open source catalog for Apache Iceberg

Java 1,799 353 Updated Jan 12, 2026

A platform that makes it easy for developers to build realtime, cost-effective, operations-focused applications

Java 1,454 212 Updated Dec 23, 2025

Improvement of Apache Kafka Mirrormaker

Java 934 197 Updated Dec 16, 2023

Fast Parallel Async HTTP/SSH/TCP/UDP/Ping Client Java Library. Aggregate 100,000 APIs & send anywhere in 20 lines of code. Ping/HTTP Calls 8000 servers in 12 seconds. (Akka) www.parallec.io

Java 804 173 Updated Jan 14, 2018

Generic Data Ingestion & Dispersal Library for Hadoop

Java 478 111 Updated Mar 19, 2023

Manages streaming of data to AWS S3 without knowing the size beforehand and without keeping it all in memory or writing to disk.

Java 214 62 Updated Feb 3, 2025
Java 34 7 Updated Aug 18, 2020

A Generalized Metadata Search & Discovery Tool

Java 30 16 Updated Jan 12, 2026

A Java library for working with Table Schema.

Java 27 21 Updated Nov 24, 2025

A GraphQL Interface for Apache Kafka and Schema Registry

Java 27 4 Updated Oct 20, 2025

Learn functional programming basics in Java and Scala by implementing Twitter for galaxy far far away

Java 20 4 Updated Jun 19, 2017