Interested to Buy Any Domain ? << Click Here >> for more details...
Answer Posted / prabhakar
Struts Flow
===========
1) When application server gets started,container loads the
web.xml
2) When first the request is made from a JSP/HTML/XSLT to
the server with a particular URI(/something.do) the control
first reaches Web.xml file.
3) It checks the mapping for /something.do in web.xml and
finds the ActionServlet and loads ActionServlet.
......
<servlet-name>action</servlet-name>
<servlet-class>org.apache.struts.action.ActionServlet</servlet-class>
.....
<servlet-mapping>
<servlet-name>action</servlet-name>
<url-pattern>*.do</url-pattern>
</servlet-mapping>
4) As part of loading ActionServlet calls the init() as
every other servlet does.
(Note: ActionServlet extends HttpServlet only)
......................
<init-param>
<param-name>config</param-name>
<param-value>/WEB-INF/struts-config.xml</param-value>
</init-param>
........................
5) In init() it takes the init-parameters as
struts-config.xml and loads the xml file.
6) Then the ActionServlet calls the process() method of
RequestProcessor class.
7) process() method checks for the appropriate action in the
action mapping for current request and maps the URI to the
action in the struts-config.xml.
8) Then it creates an object to ActionForm associated to
that action.
9) It then calls the setters and reset() methods in the form
bean(Which extends ActionForm) corresponds to the mapped action.
10) If the action tag in struts-config.xml contains validate
"true" then the validate method is called.
11) if any validation errors it return to view component
(any jsp XSLT) which is specified as an attribute of input
"/error.jsp"
12) if there are no validation errors ,it then search for
execute method in the action class and executes it.
13) execute method performs the bussinesslogic which you
provide and returns with an ActionForward key.
14) Now the returned key is searched in the mapped action
which is specified as forward tag.
15) It looks for the appropriate view component and performs
the getters on that action form corresponding to this view
component and loads the view page in the browser.
- Prabhakar
| Is This Answer Correct ? | 7 Yes | 1 No |
Post New Answer View All Answers
Where should struts xml be placed?
What is the purpose of @element annotation annotation?
What does modeldriven interceptor?
What are the benefits of the struts system?
What is the purpose of @beforeresult?
What is struts and springs in java?
What is struts in j2ee?
What are the components of struts?
What is the purpose of constant tag in struts.xml?
What is the purpose of '@customvalidator'?
Explain architecture of struts2?
What is DynaActionForm?
Can explain about the validations and in your project where did u used the validations?
What are the applications of struts?
Explain the necessity of empty tag?
