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    #email-fields { padding: 0 8px 8px 8px !important; }
    #email-gutter { width: 0 !important; }
}
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<div id="email-body">
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                                    <a class="user-hover" rel="jhuxhorn" id="email_jhuxhorn" href="http://jira.qos.ch/secure/ViewProfile.jspa?name=jhuxhorn" style="color:#326ca6;">Joern Huxhorn</a>
     created <img src="http://jira.qos.ch/images/icons/issuetypes/bug.png" height="16" width="16" border="0" align="absmiddle" alt="Bug"> <a style='color:#326ca6;text-decoration:none;' href='http://jira.qos.ch/browse/LOGBACK-1079'>LOGBACK-1079</a>
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                <a style='color:#326ca6;text-decoration:none;' href='http://jira.qos.ch/browse/LOGBACK-1079'><strong>Documentation is missing explanation of GafferConfigurator</strong></a>
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                    </td>
    </tr>
</table>
    </td>
</tr>
<tr valign="top">
    <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>
                <td>
                    <table border="0" cellpadding="0" cellspacing="0" width="100%">
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    <td style="color:#000000;font-family:Arial,FreeSans,Helvetica,sans-serif;font-size:12px;padding:0 10px 10px 0;white-space:nowrap;">
        <strong style="font-weight:normal;color:#505050;">Issue Type:</strong>
    </td>
    <td style="color:#000000;font-family:Arial,FreeSans,Helvetica,sans-serif;font-size:12px;padding:0 0 10px 0;width:100%;">
                <img src="http://jira.qos.ch/images/icons/issuetypes/bug.png" height="16" width="16" border="0" align="absmiddle" alt="Bug">        Bug
    </td>
</tr>                        <tr valign="top">
    <td style="color:#000000;font-family:Arial,FreeSans,Helvetica,sans-serif;font-size:12px;padding:0 10px 10px 0;white-space:nowrap;">
        <strong style="font-weight:normal;color:#505050;">Affects Versions:</strong>
    </td>
    <td style="color:#000000;font-family:Arial,FreeSans,Helvetica,sans-serif;font-size:12px;padding:0 0 10px 0;width:100%;">
                    1.1.3            </td>
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    <td style="color:#000000;font-family:Arial,FreeSans,Helvetica,sans-serif;font-size:12px;padding:0 10px 10px 0;white-space:nowrap;">
        <strong style="font-weight:normal;color:#505050;">Assignee:</strong>
    </td>
    <td style="color:#000000;font-family:Arial,FreeSans,Helvetica,sans-serif;font-size:12px;padding:0 0 10px 0;width:100%;">
                                        <a class="user-hover" rel="logback-dev@qos.ch" id="email_logback-dev@qos.ch" href="http://jira.qos.ch/secure/ViewProfile.jspa?name=logback-dev%40qos.ch" style="color:#326ca6;">Logback dev list</a>
                </td>
</tr>                                                <tr valign="top">
    <td style="color:#000000;font-family:Arial,FreeSans,Helvetica,sans-serif;font-size:12px;padding:0 10px 10px 0;white-space:nowrap;">
        <strong style="font-weight:normal;color:#505050;">Components:</strong>
    </td>
    <td style="color:#000000;font-family:Arial,FreeSans,Helvetica,sans-serif;font-size:12px;padding:0 0 10px 0;width:100%;">
                    logback-classic            </td>
</tr>
                        <tr valign="top">
    <td style="color:#000000;font-family:Arial,FreeSans,Helvetica,sans-serif;font-size:12px;padding:0 10px 10px 0;white-space:nowrap;">
        <strong style="font-weight:normal;color:#505050;">Created:</strong>
    </td>
    <td style="color:#000000;font-family:Arial,FreeSans,Helvetica,sans-serif;font-size:12px;padding:0 0 10px 0;width:100%;">
        15/Jun/15 10:25 AM
    </td>
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    <td style="color:#000000;font-family:Arial,FreeSans,Helvetica,sans-serif;font-size:12px;padding:0 10px 10px 0;white-space:nowrap;">
        <strong style="font-weight:normal;color:#505050;">Description:</strong>
    </td>
    <td style="color:#000000;font-family:Arial,FreeSans,Helvetica,sans-serif;font-size:12px;padding:0 0 10px 0;width:100%;">
        <p style='margin-top:0;margin-bottom:10px;'><a href="http://logback.qos.ch/manual/configuration.html" class="external-link">Logback Manual - Chapter 3: Logback configuration</a> explains configuration using <tt>ch.qos.logback.classic.joran.JoranConfigurator</tt> but there is no mention about how to use <tt>ch.qos.logback.classic.gaffer.GafferConfigurator</tt>.<br/>
<a href="http://logback.qos.ch/manual/groovy.html" class="external-link">Logback Manual - Chapter 12: Groovy Configuration</a> doesn't mention it either.</p>

<p style='margin-top:0;margin-bottom:10px;'>I'd expect something along the code snippet below:</p>

<div class="code panel" style="border-width: 1px;"><div class="codeContent panelContent">
<pre class="code-java">
<span class="code-keyword">import</span> ch.qos.logback.classic.LoggerContext;
<span class="code-keyword">import</span> ch.qos.logback.classic.gaffer.GafferConfigurator;
<span class="code-keyword">import</span> ch.qos.logback.classic.joran.JoranConfigurator;
<span class="code-keyword">import</span> ch.qos.logback.core.joran.spi.JoranException;
<span class="code-keyword">import</span> ch.qos.logback.core.status.ErrorStatus;
<span class="code-keyword">import</span> ch.qos.logback.core.status.Status;
<span class="code-keyword">import</span> ch.qos.logback.core.status.StatusManager;
<span class="code-keyword">import</span> ch.qos.logback.core.status.StatusUtil;

<span class="code-keyword">public</span> <span class="code-keyword">static</span> void configureLogging(URL configUrl)
{
        <span class="code-keyword">final</span> <span class="code-object">String</span> GROOVY_EXTENSION = <span class="code-quote">".groovy"</span>;
        ILoggerFactory loggerFactory = LoggerFactory.getILoggerFactory();
        <span class="code-keyword">if</span>(loggerFactory <span class="code-keyword">instanceof</span> LoggerContext)
        {
                LoggerContext loggerContext = (LoggerContext) loggerFactory;
        
                StatusManager sm = loggerContext.getStatusManager();
                sm.clear();
        
                <span class="code-comment">// reset previous configuration initially loaded from logback.groovy
</span>           loggerContext.reset();
        
                <span class="code-keyword">if</span>(configUrl.toString().endsWith(GROOVY_EXTENSION))
                {
                        GafferConfigurator configurator = <span class="code-keyword">new</span> GafferConfigurator(loggerContext);
                        <span class="code-keyword">try</span>
                        {
                                configurator.run(configUrl);
                        }
                        <span class="code-keyword">catch</span> (RuntimeException ex)
                        {
                                sm.add(<span class="code-keyword">new</span> ErrorStatus(<span class="code-quote">"Exception <span class="code-keyword">while</span> configuring Logback!"</span>, configUrl, ex));
                        }
                }
                <span class="code-keyword">else</span>
                {
                        JoranConfigurator configurator = <span class="code-keyword">new</span> JoranConfigurator();
                        configurator.setContext(loggerContext);
                        <span class="code-keyword">try</span>
                        {
                                configurator.doConfigure(configUrl);
                        }
                        <span class="code-keyword">catch</span> (JoranException ex)
                        {
                                sm.add(<span class="code-keyword">new</span> ErrorStatus(<span class="code-quote">"Exception <span class="code-keyword">while</span> configuring Logback!"</span>, configUrl, ex));
                        }
                }
        }
}
</pre>
</div></div>

<p style='margin-top:0;margin-bottom:10px;'>Another question is whether it would make sense to put this code into a general <tt>Configurator</tt> that's able to handle both cases.</p>
    </td>
</tr>
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    <td style="color:#000000;font-family:Arial,FreeSans,Helvetica,sans-serif;font-size:12px;padding:0 10px 10px 0;white-space:nowrap;">
        <strong style="font-weight:normal;color:#505050;">Project:</strong>
    </td>
    <td style="color:#000000;font-family:Arial,FreeSans,Helvetica,sans-serif;font-size:12px;padding:0 0 10px 0;width:100%;">
        <a style="color:#326ca6;" href="http://jira.qos.ch/browse/LOGBACK">logback</a>
    </td>
</tr>                        <tr valign="top">
    <td style="color:#000000;font-family:Arial,FreeSans,Helvetica,sans-serif;font-size:12px;padding:0 10px 10px 0;white-space:nowrap;">
        <strong style="font-weight:normal;color:#505050;">Labels:</strong>
    </td>
    <td style="color:#000000;font-family:Arial,FreeSans,Helvetica,sans-serif;font-size:12px;padding:0 0 10px 0;width:100%;">
                    configuration
                    groovy
            </td>
</tr>
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    <td style="color:#000000;font-family:Arial,FreeSans,Helvetica,sans-serif;font-size:12px;padding:0 10px 10px 0;white-space:nowrap;">
        <strong style="font-weight:normal;color:#505050;">Priority:</strong>
    </td>
    <td style="color:#000000;font-family:Arial,FreeSans,Helvetica,sans-serif;font-size:12px;padding:0 0 10px 0;width:100%;">
                        <img src="http://jira.qos.ch/images/icons/priorities/major.png" height="16" width="16" border="0" align="absmiddle" alt="Major">                Major
    </td>
</tr>
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    <td style="color:#000000;font-family:Arial,FreeSans,Helvetica,sans-serif;font-size:12px;padding:0 10px 10px 0;white-space:nowrap;">
        <strong style="font-weight:normal;color:#505050;">Reporter:</strong>
    </td>
    <td style="color:#000000;font-family:Arial,FreeSans,Helvetica,sans-serif;font-size:12px;padding:0 0 10px 0;width:100%;">
                                        <a class="user-hover" rel="jhuxhorn" id="email_jhuxhorn" href="http://jira.qos.ch/secure/ViewProfile.jspa?name=jhuxhorn" style="color:#326ca6;">Joern Huxhorn</a>
                </td>
</tr>                                                                    </table>
                </td>
            </tr>
        </table>
    </td>
</tr>













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