ContextLoaderListener Debate: Necessity and Reasons for Removal
The standard practice for Spring web applications is to utilize the ContextLoaderListener along with the DispatcherServlet. However, the question arises as to why not employ only the DispatcherServlet to load all the necessary configurations.
Purpose of ContextLoaderListener
The ContextLoaderListener serves to load non-web-related components, while the DispatcherServlet handles web-specific aspects. This separation results in the creation of a parent (application context) and child (servlet context) context.
Advantages of Removing ContextLoaderListener
Reasons for Keeping ContextLoaderListener
Recommendation
If none of these reasons apply to a specific application, it may be beneficial to remove the ContextLoaderListener. By loading all Spring configuration files through the DispatcherServlet, the application structure becomes simpler, more streamlined, and less prone to potential issues. However, it is crucial to note that any background tasks added to the servlet context must have the "load-on-startup" parameter set to ensure their timely execution.
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