Because to get the data from the database’s cache, you still have to: Generate the SQL from the ORM’s “native” query format Do a network round-trip to the database server Parse the SQL Fetch the data from the cache Serialise the data to the database’s over-the-wire format Deserialize the data into the database client library’s … Read more
The Hibernate documentation does a pretty good job at defining them: 19.2.2. Strategy: read only If your application needs to read, but not modify, instances of a persistent class, a read-only cache can be used. This is the simplest and optimal performing strategy. It is even safe for use in a cluster. 19.2.3. Strategy: read/write … Read more
To sum everything (L2 cache and query cache) up: The first thing to do is to add cache provider (I recommend using EhCache) to your classpath. Hibernate < 5.3 Add the hibernate-ehcache dependency. This library contains EhCache 2 which is now discontinued. <dependency> <groupId>org.hibernate</groupId> <artifactId>hibernate-ehcache</artifactId> <version>your_hibernate_version</version> </dependency> Hibernate >=5.3 In newer versions of Hibernate caches … Read more
Hibernate supports the following Caches: 1st Level Cache, 2nd Level Cache, Query Cache Yes. Spring itself supports the following Caching possibilities: just Method Caching Spring 3.1 introduces the new caching abstraction based on annotations around methods, yes. The 1st Level Cache is part of EVERY Hibernate application. Yes. The 1st Level Cache is created for … Read more
First of all, let’s talk about process level cache (or 2nd level cache as they call it in Hibernate). To make it work, you should configure cache provider tell hibernate what entities to cache (right in hbm.xml file if you use this kind of mapping). You tell to the cache provider how many objects it … Read more