> For the complete documentation index, see [llms.txt](https://docs.rierino.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.rierino.com/devops/microservices/building-blocks/data-sources/local-states.md).

# Local States

- [In-Memory Map](https://docs.rierino.com/devops/microservices/building-blocks/data-sources/local-states/in-memory-map.md): This state manager (com.rierino.state.manager.MapStateManager) provides a local in-memory map for storing and reading manageable number of aggregates with very low latency.
- [Caffeine Cache](https://docs.rierino.com/devops/microservices/building-blocks/data-sources/local-states/caffeine-cache.md): This state manager (com.rierino.state.manager.CaffeineCacheStateManager) uses Caffeine to provide a local in-memory cache with expiration duration and max size.
- [Samza Based](https://docs.rierino.com/devops/microservices/building-blocks/data-sources/local-states/samza-based.md): This state manager (com.rierino.state.manager.SamzaStateManager) uses Samzalocal store (LevelDB/RocksDB) for storing and reading data.
- [Lucene Based](https://docs.rierino.com/devops/microservices/building-blocks/data-sources/local-states/lucene-based.md): This state manager (com.rierino.state.manager.LuceneStateManager) provides a Lucene state for local search capabilities.
- [Single File](https://docs.rierino.com/devops/microservices/building-blocks/data-sources/local-states/single-file.md): This state manager (com.rierino.state.manager.SingleFileStateManager) provides read-only access to a local json file, mainly used for test purposes.
- [Multiple Files](https://docs.rierino.com/devops/microservices/building-blocks/data-sources/local-states/multiple-files.md): This state manager (com.rierino.state.manager.MultiFileStateManager) provides read-write access to a local folder with ided json files.
- [Selected IDs Map](https://docs.rierino.com/devops/microservices/building-blocks/data-sources/local-states/selected-ids-map.md): This state manager (com.rierino.state.manager.IDMapStateManager) provides a local in-memory map for storing and reading a specific list of aggregates with very low latency.
- [Indexed Map](https://docs.rierino.com/devops/microservices/building-blocks/data-sources/local-states/indexed-map.md): This state manager (com.rierino.state.manager.IndexedMapStateManager) provides a local in-memory map for storing and reading aggregates which is also indexed with a specific field for quick filtering.


---

# Agent Instructions
This documentation is published with GitBook. GitBook is the documentation platform designed so that both humans and AI agents can read, navigate, and reason over technical content effectively. Learn more at gitbook.com.

## Querying This Documentation
If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter, and the optional `goal` query parameter:

```
GET https://docs.rierino.com/devops/microservices/building-blocks/data-sources/local-states.md?ask=<question>&goal=<endgoal>
```

`ask` is the immediate question: it should be specific, self-contained, and written in natural language.
`goal` is optional and describes the broader end goal you are ultimately trying to accomplish on behalf of the user. GitBook uses it to tailor the answer towards what is most useful for that goal.

The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.