Free and Open Source, Distributed, RESTful Search Engine

Apollo is a reliable configuration management system suitable for microservice configuration management scenarios.

Mirror of Apache Kafka

阿里云计算平台DataWorks(https://help.aliyun.com/document_detail/137663.html) 团队出品，为监控而生的数据库连接池

Apache Flink

APM, Application Performance Monitoring System

🚌 The IK Analysis plugin integrates Lucene IK analyzer into Elasticsearch and OpenSearch, support customized dictionary.

🔎 Open source distributed and RESTful search engine.

Feign makes writing java http clients easier

Apache IoTDB

龙果支付系统（roncoo-pay）是国内首款开源的互联网支付系统，拥有独立的账户体系、用户体系、支付接入体系、支付交易体系、对账清结算体系。目标是打造一款集成主流支付方式且轻量易用的支付收款系统，满足互联网业务系统打通支付通道实现支付收款和业务资金管理等功能。

CrateDB is a distributed and scalable SQL database for storing and analyzing massive amounts of data in near real-time, even with complex queries. It is PostgreSQL-compatible, and based on Lucene.

A production-grade java implementation of RAFT consensus algorithm.

Apache Lucene open-source search software

A new data structure for accurate on-line accumulation of rank-based statistics such as quantiles and trimmed means

Java large off heap cache

High Performance Primitive Collections for Java

HanLP Analyzer for Elasticsearch

The Java agent for Apache SkyWalking

Prometheus exporter plugin for Elasticsearch

The dynamic synonym plugin adds a synonym token filter that reloads the synonym file(local file or remote file) at given intervals (default 60s).

Uber-project for foundational modules of Jackson that build directly on core components but nothing else; not including data format or datatype modules

🆕 Find the k-nearest neighbors (k-NN) for your vector data

Information Retrieval for 2013

The IK Analysis plugin integrates Lucene IK analyzer into elasticsearch, support customized dictionary.

Web app for flexible data transforms

leetcode java

数据挖掘18大算法实现以及其他相关经典DM算法