How Does Spring Boot\'s `spring.jpa.open-in-view` Property Affect Session Management?

Spring Boot's spring.jpa.open-in-view Property: Unveiling its Impact on Session Management

The spring.jpa.open-in-view property in Spring Boot configuration for JPA has sparked curiosity among developers. Here are the answers to commonly asked questions about this property:

1. What's the Default Value if the Property is Omitted?

Contrary to your assumption, the default value for spring.jpa.open-in-view is false if it's not explicitly specified.

2. Understanding the Purpose of spring.jpa.open-in-view

This property enables the "Open Session in View" (OSIV) pattern, which keeps the Hibernate Session open during request processing to ensure that entities can be lazily fetched in the view layer without triggering the LazyInitializationException.

3. OSIV and SessionFactory vs. EntityManagerFactory

OSIV does not force the use of SessionFactory over EntityManagerFactory. Hibernate leverages EntityManagerFactory internally for session management, and OSIV simply modifies the underlying session behavior.

How to Explicitly Disable OSIV and Control Session Management

To disable OSIV and allow for more explicit session management, specify the following property in your application.properties file:

spring.jpa.open-in-view=false

The Perils of OSIV: An Anti-Pattern in Modern Applications

It's important to note that OSIV is considered an anti-pattern in contemporary software architecture due to its performance and scalability implications. OSIV leads to uncontrolled database connection management, increased transaction overhead, and performance bottlenecks.

By disabling OSIV, developers can regain control over session persistence and improve the overall performance and maintainability of their Spring Boot applications.

The above is the detailed content of How Does Spring Boot\'s `spring.jpa.open-in-view` Property Affect Session Management?. For more information, please follow other related articles on the PHP Chinese website!