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Posted to user@struts.apache.org by Baran <ba...@gmail.com> on 2009/04/13 08:42:07 UTC
Struts access static list
Hi Guys,
This is about implementing reusability in the actions. I am struggling to
identify the ways how we can share some comming functionality between
different actions. Lets say I got a list of users i need to use as a
combobox list at multiple pages. Right now I have to push the code in every
action I need that list displayed for.
any idea if I can use that list at multiple places without repeating the
code. I guess we need to have it static, but not sure how we can use a list
as an static element.
Any help would be great!
Thanks
Baran
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Re: Struts access static list
Posted by Baran <ba...@gmail.com>.
Thanks Guys.
Being new to Struts is the only issue I have right now and this is the
reason I am not able to use my own ideas to the fuller. Your suggestions
have helped a lot.
Baran
newton.dave wrote:
>
> mitch gorman wrote:
>> Baran wrote:
>>> This is about implementing reusability in the actions. I am struggling
>>> to
>>> identify the ways how we can share some comming functionality between
>>> different actions. Lets say I got a list of users i need to use as a
>>> combobox list at multiple pages. Right now I have to push the code in
>>> every
>>> action I need that list displayed for.
>>>
>>> any idea if I can use that list at multiple places without repeating the
>>> code. I guess we need to have it static, but not sure how we can use a
>>> list
>>> as an static element
>>
>> it's a matter of reorganizing your Java classes. extract all the
>> code that's common to all your user-related classes into a class called
>> UserActionSupport, and then have all those user-related classes extend
>> from UserActionSupport.
>
> For another option, consider moving that kind of code into service
> objects. I'm not convinced the implementation of that behavior belongs
> in the action class unless it's *very* tightly-focused and never used
> anywhere else.
>
> There are various mechanisms that allow us to pull common code into our
> actions without inheritance (think DI/IoC). Using them keeps our action
> class hierarchy thin and light.
>
> Putting the code into our actions proper *could* lead to a heavier
> action hierarchy than necessary, where we'd use only a small portion of
> the functionality at any given time.
>
> A combination of the two, where we split the app into areas of
> functionality, create base classes for each that pull in required
> services, and add additional services in sub-classes only when we need
> to, may be the most flexible.
>
> Dave
>
>
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>
>
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Re: Struts access static list
Posted by Dave Newton <ne...@yahoo.com>.
mitch gorman wrote:
> Baran wrote:
>> This is about implementing reusability in the actions. I am struggling to
>> identify the ways how we can share some comming functionality between
>> different actions. Lets say I got a list of users i need to use as a
>> combobox list at multiple pages. Right now I have to push the code in every
>> action I need that list displayed for.
>>
>> any idea if I can use that list at multiple places without repeating the
>> code. I guess we need to have it static, but not sure how we can use a list
>> as an static element
>
> it's a matter of reorganizing your Java classes. extract all the
> code that's common to all your user-related classes into a class called
> UserActionSupport, and then have all those user-related classes extend
> from UserActionSupport.
For another option, consider moving that kind of code into service
objects. I'm not convinced the implementation of that behavior belongs
in the action class unless it's *very* tightly-focused and never used
anywhere else.
There are various mechanisms that allow us to pull common code into our
actions without inheritance (think DI/IoC). Using them keeps our action
class hierarchy thin and light.
Putting the code into our actions proper *could* lead to a heavier
action hierarchy than necessary, where we'd use only a small portion of
the functionality at any given time.
A combination of the two, where we split the app into areas of
functionality, create base classes for each that pull in required
services, and add additional services in sub-classes only when we need
to, may be the most flexible.
Dave
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RE: Struts access static list
Posted by Martin Gainty <mg...@hotmail.com>.
I sent this to you already but apparently was lost
you can use the spring plugin to create the necessary entities for you e.g.
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:bean="http://www.springframework.org/schema/util"
xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans-2.0.xsd
http://www.springframework.org/schema/util
http://www.springframework.org/schema/util/spring-util-2.0.xsd">
<util:bean id="BaranBean" path="com.baran.BaranBean">
</util:bean>
</beans>then in your Action class declare the bean, mutator and accessor e.g.
public class BaranAction extends ActionSupport
{
public com.baran.BaranBean baran_bean;
public void setBaranBean(BaranBean baran_bean) {
this.baran_bean = baran_bean;
}
public void getBaranBean() {
return this.baran_bean;
}
}Did you try this?
Martin
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> Date: Mon, 13 Apr 2009 09:00:32 -0400
> From: mgorman@shadowtv.com
> To: user@struts.apache.org
> Subject: Re: Struts access static list
>
> Baran wrote:
> > Hi Guys,
> >
> > This is about implementing reusability in the actions. I am struggling to
> > identify the ways how we can share some comming functionality between
> > different actions. Lets say I got a list of users i need to use as a
> > combobox list at multiple pages. Right now I have to push the code in every
> > action I need that list displayed for.
> >
> > any idea if I can use that list at multiple places without repeating the
> > code. I guess we need to have it static, but not sure how we can use a list
> > as an static element
> it's a matter of reorganizing your Java classes. extract all the
> code that's common to all your user-related classes into a class called
> UserActionSupport, and then have all those user-related classes extend
> from UserActionSupport.
>
>
> ---------------------------------------------------------------------
> To unsubscribe, e-mail: user-unsubscribe@struts.apache.org
> For additional commands, e-mail: user-help@struts.apache.org
>
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Re: Struts access static list
Posted by mitch gorman <mg...@shadowtv.com>.
Baran wrote:
> Hi Guys,
>
> This is about implementing reusability in the actions. I am struggling to
> identify the ways how we can share some comming functionality between
> different actions. Lets say I got a list of users i need to use as a
> combobox list at multiple pages. Right now I have to push the code in every
> action I need that list displayed for.
>
> any idea if I can use that list at multiple places without repeating the
> code. I guess we need to have it static, but not sure how we can use a list
> as an static element
it's a matter of reorganizing your Java classes. extract all the
code that's common to all your user-related classes into a class called
UserActionSupport, and then have all those user-related classes extend
from UserActionSupport.
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Re: Struts access static list
Posted by Baran <ba...@gmail.com>.
Hello Chris,
well this is what I was doing yesterday, I have this naive issue
here...mainly because of the fact that I am new to it. If we have an action
that does the the job for us. I use s:action with actionResult="false" for
no html rendering, is there a way if I can use the output as an input for a
combobox. I mean call the action class and fetch the output and push it in a
combobox or something.
I know this is something I should not be asking at this level but being new
justify my query :)
Thanks
musomesa wrote:
>
> Why not write the code in its own action or pojo and use <s:action> or
> <s:bean> wherever you want it?
> Chris M
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Re: Struts access static list
Posted by Baran <ba...@gmail.com>.
Thanks Chris,
It helped a lot in sorting things out. Also thanks to Dave for tossing up
"SDO", it sounds interesting and I would certainly consider using it at some
place.
Thanks
musomesa wrote:
>
> Yes, in between the <s:action> or <s:bean> tags the object is sitting on
> top of the value stack so you can access it with OGNL like you would a
> 'normal' action. Handy for things like populating combo boxes which crop
> up all
> over the place.
> Chris M
>
>
> **************The Average US Credit Score is 692. See Yours in Just 2 Easy
> Steps!
> (http://pr.atwola.com/promoclk/100126575x1221421325x1201417411/aol?redir=http:%2F%2Fwww.freecreditreport.com%2Fpm%2Fdefault.aspx%3Fsc%3D668072%26h
> mpgID%3D62%26bcd%3DAprilAvgfooterNO62)
>
>
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