Wednesday, May 9, 2007

spring mvc reload,starring wac4ds (AppCx)

wac4ds is the #1 thing to internalize, && the #1 source of initial confusion.

Q: What's the relationship between a DispatcherSerlvet and a WebApplicationContext (WAC)?
A: "each DispatcherServlet has its own WebApplicationContext" -- according to http://static.springsource.org/spring/docs/2.0.x/reference/mvc.html, which even shows a diagram


Q: To drive home the one-to-one mapping, give me the names of a { DS, WAC } pair?
A: These pairs are by no means behind-the-scene unsung heros. golfing-servlet.xml is the WAC if you have


<servlet-name>golfing</servlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>


Struts ActionServlet is similar:

<servlet-name>golfing</servlet-name>
<servlet-class>name.of.ActionServlet </servlet-class>


In both spring and struts web.xml, this "golfing" name would subsequently be used for url mapping.

Q: is DispatcherServlet ready to use or must be subclassed?
A: No subclass need. You give a customized name to the standard DispatcherServlet in web.xml and use it.


Q: where to put the web application context config file?
A: WEB-INF/your_servlet_name-servlet.xml must be present. known as the
webapplicationContext (wac4ds) for the DispatcherServlet

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http://www.linkedin.com/in/tanbin