On Fri, 22 Jun 2001, Yuriy Zubarev wrote:
> Hello Craig,
>
> First option turns out to be a great way to store
> initialization parameters that are shared by many
> actions. In this case what name convention should
> be adopted?
>
For options that are specific to a particular Action class (say,
com.mycompany.mypackage.MyAction), I would use names like:
com.mycompany.mypackage.MyAction.foo
for the "foo" parameter.
For initialization parameters shared by a number of different actions,
presumably the actions are related to each other. Therefore, you might
place them all in the same Java package, and use the package name as the
prefix (so the "foo" parameter shared by all actions in the package might
be named "com.mycompany.mypackage.foo" instead).
>From a technical perspective, it really does not matter what convention
you adopt. However, using rules like this accomplish two good things:
* Avoids the potential for name clashes where more than one Action
has a parameter named "foo".
* Makes the complete parameter name predictable, to reduce
mistakes.
> Best of luck,
> Yuriy Zubarev
>
>
Craig
> --- "Craig R. McClanahan" <[EMAIL PROTECTED]> wrote:
> > First, one approach is to use servlet initialization parameters, and
> > adopt
> > the convention that the names of parameters for a specific action start
> > with the fully qualified class name of that action.
> >
> > Second, if you only need *one* configuration parameter, there is a
> > general
> > purpose property of an ActionMapping called "parameter" (with accessor
> > methods getParameter() and setParameter()) that you can use for this
> > purpose.
> >
> > Third, there is a way to store Action-specific configuration information
> > in struts-config.xml. It's a little involved, but goes basically like
> > this:
> >
> > * Write your own subclass of ActionMapping that includes the extra
> > properties you are interested in. You can do individual subclasses
> > for each different action, or a class that includes all the custom
> > properties you might want for any action.
> >
> > * Modify your <action> entries in two respects:
> > - Tell Struts to use your ActionMapping subclass instead of the
> > standard one.
> > - Configure the extra parameters with <set-property> elements>
> >
> > <action path="/myaction"
> > className="com.mycompany.MyActionMapping"
> > type="com.mycompany.MyAction"
> > ... >
> > <set-property property="foo" value="Value for property foo"/>
> > <set-property property="bar" value="Value for property bar"/>
> > </action>
> >
> > * In your Action, cast the mapping you receive to your own class
> > so you can access these extra properties:
> >
> > public ActionForward perform(...) {
> >
> > MyActionMapping myMapping = (MyActionMapping) mapping;
> > String foo = myMapping.getFoo();
> > String bar = myMapping.getBar();
> > ... use foo and bar to modify the behavior ...
> >
> > }
> >
> > Craig McClanahan
> >
> >
> > On Thu, 21 Jun 2001, Yuriy Zubarev wrote:
> >
> > > Hello everybody,
> > >
> > > While working directly with servlets, in configuration
> > > file you can specify initial valus of parameters for a servlet
> > > in the following way:
> > >
> > > <init-param>
> > > <param-name>
> > > parameter
> > > </param-name>
> > > <param-value>
> > > value
> > > </param-value>
> > > </init-param>
> > >
> > > And you can easily get those values without resorting to
> > > parse information on your own.
> > >
> > > So I was wondering if it's possible to make such a
> > > thing with actions in struts-config.xml file.
> > > In another words I would like to have some custom
> > > parameters for some actions with handy means of
> > > extracting those parameters.
> > >
> > > Thank you for your time.
> > >
> > > Best of luck,
> > > Yuriy Zubarev
> > >
> > >
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> >
>
>
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