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      <base href="http://bugzilla.slf4j.org/" />
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    <body><table border="1" cellspacing="0" cellpadding="8">
        <tr>
          <th>Priority</th>
          <td>P5
          </td>
        </tr>

        <tr>
          <th>Bug ID</th>
          <td><a class="bz_bug_link 
          bz_status_NEW "
   title="NEW --- - Enable swapping of NOPLogger in SubstituteLoggerFactory"
   href="http://bugzilla.slf4j.org/show_bug.cgi?id=311">311</a>
          </td>
        </tr>

        <tr>
          <th>Assignee</th>
          <td>slf4j-dev@qos.ch
          </td>
        </tr>

        <tr>
          <th>Summary</th>
          <td>Enable swapping of NOPLogger in SubstituteLoggerFactory
          </td>
        </tr>

        <tr>
          <th>Severity</th>
          <td>enhancement
          </td>
        </tr>

        <tr>
          <th>Classification</th>
          <td>Unclassified
          </td>
        </tr>

        <tr>
          <th>OS</th>
          <td>Linux
          </td>
        </tr>

        <tr>
          <th>Reporter</th>
          <td>chetan.mehrotra@gmail.com
          </td>
        </tr>

        <tr>
          <th>Hardware</th>
          <td>PC
          </td>
        </tr>

        <tr>
          <th>Status</th>
          <td>NEW
          </td>
        </tr>

        <tr>
          <th>Version</th>
          <td>1.7.x
          </td>
        </tr>

        <tr>
          <th>Component</th>
          <td>Core API
          </td>
        </tr>

        <tr>
          <th>Product</th>
          <td>SLF4J
          </td>
        </tr></table>
      <p>
        <div>
        <pre>Currently the SubstituteLoggerFactory returns a NOPLogger while the
LoggerFactory is getting initialzed. Due to this any Logger created during
initialization period are not useful for the lifetime of the system. This is
also explained here [1]. We are facing this issue while using Slf4j with
logback in Sling which is an OSGi applicatopn [2]

The fix suggested involves changes in the application using Slf4j. It would be
simpler if the SubstituteLoggerFactory returns some forms of
SubstitutableLogger which can delegate to a different logger impl. By default
it uses NOPlogger. But later the delegate can be set to actual logger.

[1] <a href="http://www.slf4j.org/codes.html#substituteLogger">http://www.slf4j.org/codes.html#substituteLogger</a>
[2] <a href="https://issues.apache.org/jira/browse/SLING-3340">https://issues.apache.org/jira/browse/SLING-3340</a></pre>
        </div>
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