apache/hbase

mall is a Java e-commerce reference project from developer macrozheng, pairing a customer storefront with a separate admin backend on one Spring Boot and MyBatis codebase. The README describes a modular layout, mall-admin, mall-portal, mall-search, mall-security, mall-mbg, and mall-common, plus a supporting stack of Elasticsearch, RabbitMQ, Redis, and MongoDB, deployed through Docker. A sister project, mall-swarm, offers a Spring Cloud Alibaba microservices version of the same system.

Doocs Advanced Java (doocs/advanced-java) is a mostly Chinese-language collection of long-form Q&A documents on Java backend interview topics: message queues, Elasticsearch, Redis, database sharding, Dubbo, Zookeeper, Hystrix, and Spring Cloud microservices. Most of the writing traces back to one instructor, credited in the README as 中华石杉, organized by the Doocs community into linked markdown files. It is hosted on GitHub and is licensed CC-BY-SA-4.0.

Elasticsearch is an open-source distributed search and analytics engine maintained at elastic/elasticsearch. Written in Java, it's described as the foundation of Elastic's Stack platform, combining full-text search, vector search, and a scalable data store in one system. The repository's GitHub metadata doesn't state a single clear license here, and the README excerpt doesn't spell one out either.

Redis is an in-memory data structure server at redis/redis, used as a cache, a broker for messaging, and an engine for querying documents and vectors, sitting in front of a primary database. Beyond simple key-value storage it natively supports hashes, lists, sets, sorted sets, JSON, streams, and vector sets, and the README documents Redis Open Source (renamed from Redis Community Edition at v8.0), plus the separately offered Redis Software and Redis Cloud.