How To Use Hibernate Attribute Lazy Loading
Description: By default, the attributes of an entity are loaded eagerly (all at once). But, we can load them lazy as well. This is useful for column types that store large amounts of data: CLOB, BLOB, VARBINARY, etc or details that should be loaded on demand. In this application, we have an entity named Author. Its properties are: id, name, genre, avatar and age. And, we want to load the avatar lazy. So, the avatar should be loaded on demand.
Key points:
- in
pom.xml, activate Hibernate bytecode enhancement (e.g. use Maven bytecode enhancement plugin) - in entity, annotate the attributes that should be loaded lazy with
@Basic(fetch = FetchType.LAZY) - in
application.properties, disable Open Session in View
Check as well:
- Default Values For Lazy Loaded Attributes
- Attribute Lazy Loading And Jackson Serialization
