How often does the method annotated with @PreDestroy execute when a Spring bean's lifecycle ends?

The method annotated with @PreDestroy in Spring is called once at the end of the bean's lifecycle, just before it is destroyed by the Spring container.

This occurs in the following cases:

• When the application or Spring context is stopped.
• When a bean's scope is removed (for example, for session or request scope).

@PreDestroy is used for resource cleanup, closing connections, saving state, and other finalization operations.

Example:

@Component
public class MyBean {

    @PreDestroy
    public void cleanup() {
        System.out.println("Bean is being destroyed");
        // resource cleanup
    }
}

Thus, the method with @PreDestroy is triggered exactly once during the bean's lifecycle, immediately before its destruction.