Re: [Springframework-developer] DefaultPropertyPlaceholderConfigurer

[Stefan K. <st...@kl...>]

Axel, imho this looks great.  Maybe you can also open an issue in
Jira, so that everyone can vote for it.  :)

Cheers,
-Stefan



On 12/28/06, Axel Wienberg <axe...@go...> wrote:
> Hi all,
> We're using the PropertyPlaceholderConfigurer quite a bit at work, and
> I was thinking about ways to handle default values more elegantly.
> When a property is not configured by a customer, usually some default
> should be used.
> The standard spring way seems to be to put a property map inside the
> XML configuration file (as in
> http://www.kleineikenscheidt.de/stefan/archives/2005/06/default-configuration-with-spring.html),
> or to have two properties files, one with the defaults, and one for
> customer customization.
> However, that means some redundancy: Each placeholder is listed two or
> three times, once in the list of defaults, once when it is assigned to
> a bean property, and once when it is customized.
> What I've come up with is this:
>
> <bean id="propertyConfigurer"
>     class="net.wuenschenswert.spring.DefaultPropertyPlaceholderConfigurer">
>   <property name="location" value="file:custom/my.properties"/>
> </bean>
>
> <bean id="mybean">
>   <property name="cachesize" value="${my.cache.size=100}"/>
> </bean>
>
> If "my.properties" contains a value for my.cache.size, that value is
> used, otherwise, the default "100" is assigned.  The idea is to have
> the default value just where the placeholder and the bean property
> are, using a syntax like ${placeholder=defaultvalue}.
>
> I would love to see this in the springframework proper, I'm just not
> sure how to go about submitting it. If you're interested in the
> source, please visit
> http://www.wuenschenswert.net/wunschdenken/archives/107
>
> Regards,
> Axel
>
> -------------------------------------------------------------------------
> Take Surveys. Earn Cash. Influence the Future of IT
> Join SourceForge.net's Techsay panel and you'll get the chance to share your
> opinions on IT & business topics through brief surveys - and earn cash
> http://www.techsay.com/default.php?page=join.php&p=sourceforge&CID=DEVDEV
> _______________________________________________
> Springframework-developer mailing list
> Spr...@li...
> https://lists.sourceforge.net/lists/listinfo/springframework-developer
>


-- 
Stefan Kleineikenscheidt           tel. +49 (711) 99 33 035
Rosenbergstr. 58                   mob. +49 (172) 130 54 77
70176 Stuttgart (GERMANY)       st...@kl...