<style>
/* Changing the layout to use less space for mobiles */
@media screen and (max-device-width: 480px), screen and (-webkit-min-device-pixel-ratio: 2) {
#email-body { min-width: 30em !important; }
#email-page { padding: 8px !important; }
#email-banner { padding: 8px 8px 0 8px !important; }
#email-avatar { margin: 1px 8px 8px 0 !important; padding: 0 !important; }
#email-fields { padding: 0 8px 8px 8px !important; }
#email-gutter { width: 0 !important; }
}
</style>
<div id="email-body">
<table id="email-wrap" align="center" border="0" cellpadding="0" cellspacing="0" style="background-color:#f0f0f0;color:#000000;width:100%;">
<tr valign="top">
<td id="email-page" style="padding:16px !important;">
<table align="center" border="0" cellpadding="0" cellspacing="0" style="background-color:#ffffff;border:1px solid #bbbbbb;color:#000000;width:100%;">
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<td bgcolor="#003366" style="background-color:#003366;color:#ffffff;font-family:Arial,FreeSans,Helvetica,sans-serif;font-size:12px;line-height:1;"><img src="http://jira.qos.ch/s/en_USet69y6/731/19/_/jira-logo-scaled.png" alt="" style="vertical-align:top;" /></td>
</tr><tr valign="top">
<td id="email-banner" style="padding:32px 32px 0 32px;">
<table align="left" border="0" cellpadding="0" cellspacing="0" width="100%" style="width:100%;">
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<td style="color:#505050;font-family:Arial,FreeSans,Helvetica,sans-serif;padding:0;">
<img id="email-avatar" src="http://jira.qos.ch/secure/useravatar?avatarId=10122" alt="" height="48" width="48" border="0" align="left" style="padding:0;margin: 0 16px 16px 0;" />
<div id="email-action" style="padding: 0 0 8px 0;font-size:12px;line-height:18px;">
<a class="user-hover" rel="rmayfiel" id="email_rmayfiel" href="http://jira.qos.ch/secure/ViewProfile.jspa?name=rmayfiel" style="color:#326ca6;">Rich Mayfield</a>
commented on <img src="http://jira.qos.ch/images/icons/newfeature.gif" height="16" width="16" border="0" align="absmiddle" alt="New Feature"> <a style='color:#326ca6;text-decoration:none;' href='http://jira.qos.ch/browse/LOGBACK-719'>LOGBACK-719</a>
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<div id="email-summary" style="font-size:16px;line-height:20px;padding:2px 0 16px 0;">
<a style='color:#326ca6;text-decoration:none;' href='http://jira.qos.ch/browse/LOGBACK-719'><strong>Provide a mechanism to specify an appender factory class</strong></a>
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<td id="email-fields" style="padding:0 32px 32px 32px;">
<table border="0" cellpadding="0" cellspacing="0" style="padding:0;text-align:left;width:100%;" width="100%">
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<td id="email-gutter" style="width:64px;white-space:nowrap;"></td>
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<table border="0" cellpadding="0" cellspacing="0" width="100%">
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<td colspan="2" style="color:#000000;font-family:Arial,FreeSans,Helvetica,sans-serif;font-size:12px;padding:0 0 16px 0;width:100%;">
<div class="comment-block" style="background-color:#edf5ff;border:1px solid #dddddd;color:#000000;padding:12px;">Ironically, the third use case is the one I'd really like to solve but may not have conveyed well.
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In an OSGi environment I would have multiple bundles offering ComponentFactory services. These bundles may come and go as bundles are installed, started, stopped, etc.
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Another bundle can listen for ComponentFactory service registrations and act as a broker whenever there is a need to instantiate a component. This broker would itself implement ComponentFactory and it is that implementation that is registered with logback. When logback needs to instantiate an object it could go to the broker, which knows about all implementations of ComponentFactory and could find the one that is willing to instantiate an object. This separates the notion of OSGi services from logback.
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What I'd like to do is make it easy to dynamically add appender implementations (and other components too I suppose) without having to revisit the OSGi framework's configuration for each fragment. Instead, the configuration could specify the broker, which implements the OSGi service listener, one time and then everything is dynamic from that point on. The broker in this case would be reachable by logback's classloader.
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In any event, hopefully that explained my intent. The interface you've proposed and configuration options sound great.</div>
<div style="color:#505050;padding:4px 0 0 0;"> </div>
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</td><!-- End #email-page -->
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<td style="color:#505050;font-family:Arial,FreeSans,Helvetica,sans-serif;font-size:10px;line-height:14px;padding: 0 16px 16px 16px;text-align:center;">
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</table><!-- End #email-wrap -->
</div><!-- End #email-body -->