Re: [Springframework-developer] Hot updating of bean properties

[<spr...@wr...>]

Hi Bryant,

a colleague of mine has programmed a =
"ReloadingPropertyPlaceholderConfigurer" have a look at: =
http://www.wuenschenswert.net/wunschdenken/archives/127 .

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Regards,

Jan=20

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--
Jan Tietjens
Software Engineer

CoreMedia

Ludwig-Erhard-Str. 18
20459 Hamburg, Germany
<www.coremedia.com>


CoreMedia AG
Executive Board: S=F6ren Stamer (CEO), Dr. Klemens Kleiminger (CFO)
Supervisory Board: Prof. Dr. Joachim Schmidt (Chairman)
Trade Register: Amtsgericht Hamburg, HR B 76277

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From: Bryant Harris - bry...@ho... =
[mailto:+spring-dev-list+tietjens+cec8b94c39.bryant_harris#hotmail.com@sp=
amgourmet.com]=20
Sent: Freitag, 1. Februar 2008 01:01
To: spr...@li...
Subject: [Springframework-developer] Hot updating of bean properties =

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I had an idea and wanted to see if anyone has persued it.

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So you know how the ProperyPlaceholderConfigurer allows you to =
externalize properties using ant style notation ${some.prop} in bean =
definitions?

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What if you could change those values at runtime and have the Configurer =
hot update the property on the bean with the latest value?

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Obviously the configurer would need to keep track of the beans created =
from the bean definitions it first updates, but I don't think this is =
something that would be too hard to do.

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Also, I realize that not all beans are amenable to having their =
properties updated.  So although a boolean attribute might be easily =
switched, updating say the URL on a JDBC connection would be more =
complicated since it might imply that all connections should be flushed, =
something the standard datasource might not do (or maybe it throws an =
IllegalStateException).

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At anyrate, has anyone tinkered around with an idea like this?

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Thanks,

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Bryant