# spring-data-demo

Companion code for a series of posts on [ankurm.com](https://ankurm.com) covering Spring Data integrations on Spring Boot 4.1 / JDK 25. Each top-level directory is one module, one post, independently runnable.

| Module | Post | Stack |
|---|---|---|
| [`time-series/`](./time-series) | Time-Series Data in Java: QuestDB vs InfluxDB vs TimescaleDB | QuestDB 10.0.1, InfluxDB 3 Core 3.12.0, TimescaleDB 2.25.1 (PG17) |
| [`mongodb/`](./mongodb) | Spring Boot 4 with MongoDB: Spring Data MongoDB, Aggregations and Transactions | MongoDB 9.0.2 single-node replica set, Spring Data MongoDB |
| [`elasticsearch/`](./elasticsearch) | Full-Text Search with Spring Data Elasticsearch on Spring Boot 4 | Elasticsearch 9.4.8, Spring Data Elasticsearch 6.1.1 |
| [`distributed-cache/`](./distributed-cache) | Distributed Caching in Spring Boot: Hazelcast vs Infinispan vs Redis | Hazelcast 5.5.0 (embedded), Infinispan 16.1.4 (embedded), Redis 8.8.3 (Testcontainers) |

Each module has its own `pom.xml`, a `docker-compose.yml` for its backing services, and a `docs/output/` directory holding the real, re-runnable transcripts that every number quoted in its post traces back to. There are no narrative doc chapters here — the deeper material for each post lives in accordions inside the post itself.

Build and test each module from inside its own directory, e.g.:

```bash
cd time-series
source scripts/services-up.sh   # starts QuestDB, InfluxDB 3, TimescaleDB
mvn test
```