Re: [Springframework-developer] New feature

[Rod J. <rod...@in...>]

I've renamed the package org.springframework.web.servlet.handler.metadata
for consistency with other attribute usage, and because "commonsattributes"
was an inelegant package name.

----- Original Message ----- 
From: "Rod Johnson" <rod...@in...>
To: <spr...@li...>
Sent: Wednesday, December 24, 2003 5:30 PM
Subject: [Springframework-developer] New feature


> All,
>
> I've added a feature that should be useful in simple web applications.
>
> Instead of defining all controller beans in the servlet XML file, I've
added
> a HandlerMapping implementation that automatically adds to the servlet's
> bean factory all controllers having a PathMap attribute (see below for an
> example of the source syntax). The PathMapHandlerMapping automatically
> instantiates a singleton instance of the class, autowiring it via bean
> properties (if there's a no-arg constructor) or constructor args. The
> example shows dependency on a business object, defined in the servlet XML
> file.
>
> All you need to do is add the new PathMapHandlerMapping to your servlet
XML
> file. There's no need to define a bean or mapping for each controller.
>
> Note that multiple attributes per controller class are supported, as shown
> below. It's possible to combine this with the explicit mapping approach,
so
> it scales nicely to more complex requirements.
>
> The attributes implementation is Commons Attributes, as presently used for
> attribute-driven transaction management, another new feature. (See the
> org.springframework.aop.framework.autoproxy.metadata tests, and the
> /attributes directory of the PetStore sample app, for examples of this.)
>
> See the comments in the
> org.springframework.web.servlet.handler.commonsattributes package for
> further details.
>
> If there's enough interest, I'll add an example, including a build script.
>
> Using Commons Attributes really doesn't add much complexity to the build
> script (look at the PetStore /attributes/build.xml file), and the
> precompilation step is very fast. I think source-level attributes are
> potentially very useful in a number of areas.
>
> To support this, I added a registerBeanOfClass() method to
> AutowireCapableBeanFactory, which may be useful to those of you wanted to
> plug in an instance of a new class, benefiting from autowiring.
>
> Regards,
> Rod
>
>
> /**
>  *
>  * Normal comments here. The attribute below will automatically create
>  * a mapping from this path to an instance of this controller (shared for
> all paths).
>  * Must use Commons Attributes compiler.
>  *
>  *
>
@@org.springframework.web.servlet.handler.commonsattributes.PathMap("/foo.cg
> i")
>  *
>
@@org.springframework.web.servlet.handler.commonsattributes.PathMap("/baz.cg
> i")
>  */
> public class FooController extends AbstractController {
>
>  private Cruncher cruncher;
>
>  public FooController(Cruncher cruncher) {
>   this.cruncher = cruncher;
>  }
>
>
>  protected ModelAndView handleRequestInternal(HttpServletRequest arg0,
> HttpServletResponse arg1) throws Exception {
>  // Use cruncher
>   return new ModelAndView("test");
>  }
>
> }
>
>
>
>
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