Why Hibernate is lazy loading?
The main purpose of lazy loading is to fetch the needed objects from the database. For example, we have a parent class, and that parent has a collection of child classes. Now, Hibernate can use lazy loading, which means it will load only the required classes, not all classes.
What is lazy loading and eager loading in Hibernate?
Eager Loading is a design pattern in which data initialization occurs on the spot. Lazy Loading is a design pattern that we use to defer initialization of an object as long as it’s possible.
What does lazy initialization mean in Hibernate?
Lazy fetching (or initialization) is the opposite of eager fetching. Lazy fetching, the default in hibernate, means that when a record is loaded from the database, the one-to-many relationship child rows are not loaded. E.g. @Entity @Table(name = “COMPANY”) public class Company { @OneToMany(fetch = FetchType.
What is difference between eager and lazy loading?
Lazy Loading vs. Eager Loading. While lazy loading delays the initialization of a resource, eager loading initializes or loads a resource as soon as the code is executed.
How do you load a lazy object in Hibernate?
To enable lazy loading explicitly you must use “fetch = FetchType. LAZY” on a association which you want to lazy load when you are using hibernate annotations.
What is the use of FetchType in Hibernate?
The FetchType defines when Hibernate gets the related entities from the database, and it is one of the crucial elements for a fast persistence tier. In general, you want to fetch the entities you use in your business tier as efficiently as possible.
Is lazy loading default in Hibernate?
How to enable lazy loading in hibernate. Before moving further, it is important to recap the default behavior of lazy loading in case of using hibernate mappings vs annotations. The default behavior is to load ‘property values eagerly’ and to load ‘collections lazily’.
What is second level cache in Hibernate?
A Hibernate second-level cache is one of the data caching components available in the Hibernate object-relational mapping (ORM) library. Hibernate is a popular ORM library for the Java language, and it lets you store your Java object data in a relational database management system (RDBMS).