> For the complete documentation index, see [llms.txt](https://bernardo.gitbook.io/development-docs-java/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://bernardo.gitbook.io/development-docs-java/jpa/lifecycle.md).

# Lifecycle

JPA entities go through a series of states as they are modified.

## States

![](https://github.com/bernardo-mg/development-docs/tree/607d3a34739325f64d3fc216771c0bc79458f781/java/img/diagram/jpa_lifecycle.png)

| State    | Description                                                     |
| -------- | --------------------------------------------------------------- |
| New      | Doesn't exist in the DB as is not handled by the entity manager |
| Managed  | Persisted into DB and handled by the entity manager             |
| Detached | Removed from the entity manager, but still persisted in the DB  |
| Removed  | Deleted from the DB                                             |

![](https://2153084492-files.gitbook.io/~/files/v0/b/gitbook-legacy-files/o/assets%2F-LpyxkQBJaXPA3WbwKXt%2F-Lq6aWutA0eCStgnEuEw%2F-Lq6anikiU1bGzO7m2Bz%2Fjpa_lifecycle_db.png?alt=media\&token=09d05915-e743-4a22-be64-8219bc2fd15d)

Only the managed and removed states interact directly with the database. This requires an open transaction to work.

## Callback Methods

There is a series of annotations, such as @PrePersist or @PostLoad, which can be used to interact with persistence events through callback methods.

These can be useful for auditing or initializing values.

## More Information

* [Managed Entity Objects](https://www.objectdb.com/java/jpa/persistence/managed)