/315-frameworks-spring-mongodb

name: 315-frameworks-spring-mongodb
description: Use when you need to design or implement MongoDB data access in Spring Boot — including document modeling, Spring Data Mongo repositories/templates, indexing, optimistic concurrency, and error handling. This should trigger for requests such as Add MongoDB in Spring Boot; Review Spring Data Mongo design; Improve error handling for Mongo writes; Model MongoDB documents for a Spring Boot service; Configure Spring Data MongoDB indexes or transactions. Part of Plinth Toolkit
license: Apache-2.0
metadata:
  author: Juan Antonio Breña Moral
  version: 0.18.0

Spring Boot — MongoDB

Apply Spring Data MongoDB guidance with concrete examples for design, implementation, and error handling.

Constraints

Compile before MongoDB refactors; verify after changes.

• **MANDATORY**: Run `./mvnw compile` or `mvn compile` before applying any change
• **SAFETY**: If compilation fails, stop immediately
• **VERIFY**: Run `./mvnw clean verify` or `mvn clean verify` after applying improvements
• **BEFORE APPLYING**: Read the reference for detailed rules and examples

When to use this skill

• Add MongoDB in Spring Boot
• Review Spring Data Mongo repositories/documents
• Improve duplicate key handling, retries, or optimistic locking in Mongo flows
• Model MongoDB documents for a Spring Boot service
• Configure Spring Data MongoDB indexes or transactions

Workflow

1. **Read reference and assess project context**

Read `references/315-frameworks-spring-mongodb.md` and inspect persistence setup before proposing changes.

2. **Gather scope and decide target improvements**

Identify data model, consistency, and query requirements to define safe improvements.

3. **Apply framework-aligned changes**

Implement/refactor mappings, repositories, indexes, and failure handling policies.

4. **Run verification and report results**

Execute build/tests and summarize what changed, what was verified, and follow-up actions.

Reference

For detailed guidance, examples, and constraints, see [references/315-frameworks-spring-mongodb.md](references/315-frameworks-spring-mongodb.md).