Spring DisposableBean: Destroy Callback Explained

The DisposableBean interface is a callback interface provided by the Spring framework for managing the lifecycle of beans. When a bean implements the DisposableBean interface, the Spring container will call the destroy() method of that interface before the bean is destroyed, to perform some cleanup tasks.

Specifically, the DisposableBean interface defines a destroy() method that Spring container calls before the bean is destroyed. In this method, resources can be released, connections closed, threads stopped, and other cleanup operations can be performed to ensure that resources are properly released and closed when the bean is being destroyed, thus avoiding memory leaks or resource wastage issues.

It is important to note that using the DisposableBean interface to manage the destruction of beans requires implementing the interface and the destroy() method. This approach is more standardized and uniform compared to using custom destroy methods (such as specifying destroy-method in the configuration file), making it easier to manage and maintain beans that require complex cleanup operations.