- XQA is a suite of Docker based microservices that improves the scalability of BaseX - an XML database engine.
- Instead of loading each XML file into a single BaseX engine, XQA distributes them - via an AMQP message broker - across multiple BaseX engines.
- XQA ships with a basic web frontend - as well as a REST API - which lets you run XQuery, and analytics, against the distributed data.
- Easy to deploy / extend:
- each microservice runs in its own container.
- add extra BaseX engines easily - they self register against the AMQP message broker.
- can run in either a docker-compose or k8s environment.
- Proven scalability & performance improvements - graphs in xqa-perf show:
- ingest timing statistics.
- XML file distribution.
- Quality Radiatior for CI; static analysis and coverage metrics.
- Transparency:
- container console logging.
- JSON instrumentation sent to a central PstgreSQL instance.
- ActiveMQ
- Angular
- Docker - containers can be built from GitHub or pull'd from hub.docker.com.
- Java 10/11.
- PostgreSQL 11
- Python 3.6
- Ubuntu 18.04
| CI | GitHub | |
|---|---|---|
 |
xqa-commons-qpid-jms | a Maven Central shared library. |
 |
xqa-db | PostgreSQL. |
 |
xqa-db-amqp | AMQP interface to PostgresSQL. |
 |
xqa-ingest | XML file loader. |
 |
xqa-ingest-balancer | distributes XML across XQA BaseX engine(s). |
 |
xqa-message-broker | ActiveMQ. |
 |
xqa-perf | end to end integration tests, with Matplotlib graphs. |
 |
xqa-query-balancer | XQA REST API. |
 |
xqa-query-ui | UI for querying XQA. |
 |
xqa-shard | BaseX engine with AMQP interface. |
| xqa-test-data | a collection of XML files used by XQA. |
XQA is a proof of concept project. It scratched an itch and achieved what it set out to prove. Refer to the GitHub issue board for outstanding issues.