Second Level Cache

Hibernate Caching

Caching is a way to improve system performance. Cache refers to the database between the application and the site. Maintains recently used data items to reduce the number of website hits as much as possible.

Hibernate Caching

The second-level cache is optional. The first level repository is suspended and is always consulted before finding an item in the second level repository. The second level archive can be configured for each level and set and has a greater responsibility for archiving things at all times.

Like other fully equipped Object Relational Mapping (ORM), Hibernate has the concept of a first-class repository. A session-scoped cache ensures that each entity instance is loaded only once in the persistent context. Once the session is closed, the first-level cache is terminated as well.

On the other hand, the second-level SessionFactory-scoped repository, which means it is shared with all sessions created by the same session factory. If a business event is identified by its id, and if second-level retention is enabled for that business, the following is possible:

  • If an instance is already present in the first-level cache, it is returned from there
  • If the event is not found in the first level repository, and the corresponding instance status is added to the second level archive, then the data is retrieved there, and the event is compiled and returned.
  • Otherwise, the necessary data are loaded from the database and an instance is assembled and returned