Spread the words...1346200NullPointerException is an unchecked exception and extends RuntimeException. It doesn’t force you to use catch block to handle it. NullPointerException is very much like a nightmare for most ... Read More
One of the common problems of people that start using Hibernate is performance, if you don't have much experience in Hibernate you will find how quickly your application becomes slow. If you enable sql traces, you would see how many queries are sent to database that can be avoided with little Hibernate knowledge. In current post I am going to explain how to use Hibernate Query Cache to avoid amount of traffic between your application and database. Hibernate offers two caching levels: The first level cache is the session cache. Objects are cached within the current session and they are only alive until the session is closed.The second level cache exists as long as the session factory is alive. Keep in mind that in case of Hibernate, second level cache is not a tree of objects; object instances are not cached, instead it stores attribute values. After this brief introduction (so brief I know) about Hibernate cache, let's see what is Query Cache and how is interrelated with second level
Caching is a facility provided by ORM frameworks which help users to get fast running web application, while help framework itself to reduce number of queries made to database in a single transaction. Hibernate achieves the second goal by implementing first level cache. Fist level cache in hibernate is enabled by default and you do …
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