What is Struts 2x Architecture and flow ?

User Sends request

User sends a request to the server for some resource.

FilterDispatcher determines the appropriate action

The FilterDispatcher looks at the request and then determines the appropriate Action.

Interceptors are applied

Interceptors configured for applying the common functions such as workflow, validation, file upload etc. are automatically applied to the request.

Execution of Action

Then the action method is executed to perform the database related operations like storing or retrieving data from the database.

Output rendering

Then the Result renders the output.

  

Return of Request

Then the request returns through the interceptors in the reverse order.

The returning request allows us to perform the clean-up or additional processing.

Display the result to user

Finally the control is returned to the servlet container, which sends the output to the user browser.