<html><head></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; "><br><div><div>On Oct 12, 2011, at 9:33 AM, Carlo de Wolf wrote:</div><br class="Apple-interchange-newline"><blockquote type="cite"><span class="Apple-style-span" style="border-collapse: separate; font-family: Helvetica; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: 2; text-align: -webkit-auto; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-border-horizontal-spacing: 0px; -webkit-border-vertical-spacing: 0px; -webkit-text-decorations-in-effect: none; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; font-size: medium; ">On 10/12/2011 09:10 AM, Heiko Braun wrote:<br><blockquote type="cite"><br></blockquote><blockquote type="cite">Maybe this has been discussed elsewhere, but looking at the EJB description I can see that expressions are allowed basically anywhere.<br></blockquote><blockquote type="cite">This is an example how is should _not_ be done. I.e. the "default-mdb-instance-pool" is certainly not something you would like to configure by external means, do you?<br></blockquote><br>I can easily counter this with: why not?<br><br>Seriously I'm thinking of something like configuration items that are based on the system environment.<br>This would have the bind.address make sense.<br><br>A sliding one would be the default RA.<br><br>It would make default-mdb-instance-pool a no-go, because that's an AS configuration item without any dependencies on system environment.<br></span></blockquote></div><br><div><br></div><div>You seem to have answered the question yourself. Expressions are useful when you need to configure certain aspects by external means or depending on the environment. </div><div><br></div><div><br></div><div>Ike</div><div><br></div></body></html>