Request processing components

- [Instructor] Now that we've looked closer at how JEE…and Spring context impact application behavior,…let's turn our attention to the flow of request…through a series of Spring components…and it all begins with the dispatcher servlet.…I like to call the dispatcher servlet…the traffic cop of components…because it plays a major role in how requests get handled…and ultimately how responses make it back…to the user's web browser.…This is another set of component interactions…that's critical to understand deeply…so that you can make better design, development,…and troubleshooting decisions.…

The dispatcher servlet is out front…in the request processing workflow…and thereby governs a lot of the routing logic…for request processing.…It does so by delegating…to special purpose Spring managed beans…that each play a particularly useful role in the workflow.…Let's walk through them now.…First there's the handler map.…It maps a request to its appropriate handler.…A handler is typically a controller.…

The type of mapping comes in different varieties,…