# Query & Search Sources

Connection details for query managers are defined using system elements, which allows defining them once and reusing them across different state and query elements.

Query managers connect to a specific system, translate Rierino query format to query statements in that system's domain specific language and return results in JSON form. Typically, a separate query manager is defined for each database.

It is possible to define any number and type of new query managers with specialized configurations, and typical managers deployed with Rierino are described in this section. A number of settings are shared across all query manager types:

| Setting           | Definition                                                                                                      | Example                                     | Default                        |
| ----------------- | --------------------------------------------------------------------------------------------------------------- | ------------------------------------------- | ------------------------------ |
| manager           | Fully qualified class name for the query manager                                                                | com.rierino.query.manager.MongoQueryManager | -                              |
| retriesPerStep    | Allowed number of retries at each backoff step during reconnect                                                 | 3                                           | 1                              |
| backoffSteps      | Comma separated list of milliseconds to wait between backoff steps                                              | 10,20,30                                    | 10,100,200,500,1000,1000,10000 |
| logDetail         | Whether detailed trace logs should be performed (always[^1]/never[^2]) independent of the current logging level | never                                       | -                              |
| telemetry.enabled | Whether handler should produce OpenTelemetry  traces & metrics                                                  | false                                       | true                           |

{% file src="/files/bWdAENTKrRG12uFu6Sql" %}
Example Query Manager Definition (Can be Imported on Element Screen)
{% endfile %}

[^1]: Typically used for debugged managers

[^2]: Typically used for sensitive managers  


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# Agent Instructions: 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:

```
GET https://docs.rierino.com/devops/microservices/building-blocks/query-and-search-sources.md?ask=<question>
```

The question should be specific, self-contained, and written in natural language.
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.