The first level cache is available only until the session is open, once the session is closed, the first level cache is destroyed. This is disabled by default, but we can enable it through configuration. This cache is enabled by default and there is no way to disable it. This cache is maintained at the SessionFactory level and shared among all sessions in Hibernate. This is local to the Session object and cannot be shared between multiple sessions. First level and second level cache for which the difference is given below: First Level Cache What is the difference between first level cache and second level cache? It also holds second-level cache data if enabled.Ĩ. This also provides the facility to get information like statistics and metadata related to a class, query executions, etc. ![]() The internal state of a SessionFactory which includes metadata about ORM is immutable, i.e once the instance is created, it cannot be changed. It is a factory class that gives the Session objects based on the configuration parameters in order to establish the connection to the database.Īs a good practice, the application generally has a single instance of SessionFactory. SessionFactory provides an instance of Session. Additionally, It has factory methods to return Query, Criteria, and Transaction objects. Session also has methods for storing, retrieving, modifying or deleting data from database using methods like persist(), load(), get(), update(), delete(), etc. What are some of the important interfaces of Hibernate framework?Ī session is an object that maintains the connection between Java object application and database. Special Features: Hibernate supports OOPs features like inheritance, associations and also supports collections.In the case of JDBC, it throws a checked exception called SQLException thereby mandating the developer to write try-catch blocks to handle this exception at compile time. This along with the built-in transaction management system helps developers to avoid writing multiple try-catch blocks to handle exceptions. ![]()
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |