Invalidating space timestamp

26-Dec-2019 04:38

To configure Hibernate to use second-level cache, we just have to set several properties: Query caches are useful for queries that are frequently executed with the same parameter values, and for entities that are in general unchanged.

Our example is a perfect one for query caches: we are searching for branches by city; this search is quite frequently used, and the probability to search all stores in a given city, by different requests, is quite big.

Also, we introduce new branches, or change their address, very seldom.

Once a store query was cached, it will be invalidated each time we add or update a store.

I’s a REST API, retrieving data from the following database: The database models an electronic store.

The store has several branches, saved in the stores table (which id, city, address).

Jetty was used in embedded mode, and the build produces a file; it can be easily run. As you can see in the repository, we have several controllers.

We have a controller that saves items, updates items or retrieves them by id.

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The demo application, named Electronic Store, manages an electronic store.Of course, some optimisations are possible, which send us to the subject of Hibernate caching.Hibernate supports several levels of caching: first level cache (enabled by default), second level cache, query cache (same as first level cache).To improve performance, the second level cache concept was born.

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To use second-level cache, we must configure Hibernate to use second-level cache, and integrate a caching solution.

On top of second level cache, a query cache can be added.

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