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<td class="page-title-pattern-first-line " style="padding: 0px; border-collapse: collapse; font-family: Arial, sans-serif; font-size: 14px; padding-top: 10px"> <a href="http://jira.qos.ch/browse/SLF4J" style="color: #3b73af; text-decoration: none">SLF4J</a> / <a href="http://jira.qos.ch/browse/SLF4J-343" style="color: #3b73af; text-decoration: none"><img src="cid:jira-generated-image-static-bug-0c412340-e986-4180-8d41-c0702e9629ea" height="16" width="16" border="0" align="absmiddle" alt="Bug" style="vertical-align: text-bottom" /></a> <a href="http://jira.qos.ch/browse/SLF4J-343" style="color: #3b73af; text-decoration: none">SLF4J-343</a>
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Issue Type:
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<td class="has-icon" style="padding: 0px; border-collapse: collapse; font: normal 14px/20px Arial, sans-serif; padding: 2px 0 2px 5px; vertical-align: top"> <img src="cid:jira-generated-image-static-bug-0c412340-e986-4180-8d41-c0702e9629ea" height="16" width="16" border="0" align="absmiddle" alt="Bug" style="vertical-align: text-bottom" /> Bug
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Affects Versions:
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1.7.12
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<td style="padding: 0px; border-collapse: collapse; font: normal 14px/20px Arial, sans-serif; padding: 2px 0 2px 5px; vertical-align: top"> <a class="user-hover" rel="slf4j-dev@qos.ch" id="email_slf4j-dev@qos.ch" href="http://jira.qos.ch/secure/ViewProfile.jspa?name=slf4j-dev%40qos.ch" style="color:#3b73af;; color: #3b73af; text-decoration: none">SLF4J developers list</a>
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Components:
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jul-to-slf4j
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Created:
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25/Nov/15 8:54 AM
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Environment:
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<p style="margin-top:0;margin-bottom:10px;; margin: 10px 0 0 0">Classpath:<br /> logback-core-1.1.3.jar<br /> logback-classic-1.1.3.jar<br /> slf4j-api-1.7.12.jar<br /> jul-to-slf4j-1.7.12.jar</p>
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Priority:
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Reporter:
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<td style="padding: 0px; border-collapse: collapse; font: normal 14px/20px Arial, sans-serif; padding: 2px 0 2px 5px; vertical-align: top"> <a class="user-hover" rel="hinneLinks" id="email_hinneLinks" href="http://jira.qos.ch/secure/ViewProfile.jspa?name=hinneLinks" style="color:#3b73af;; color: #3b73af; text-decoration: none">Konstantin Hollerith</a>
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<p style="margin-top:0;margin-bottom:10px;; margin: 10px 0 0 0">I'm trying to use the <tt>SLF4JBridgeHandler</tt> to only redirect specific messages to SLF4j.<br /> I tried to set a <tt>java.util.logging.Filter</tt>, but the <tt>SLF4JBridgeHandler</tt> dosn't respect Filters. <br /> If you look at the call hierarchy of <tt>java.util.logging.Filter.isLoggable(LogRecord)</tt>, it seems every handler is itself responsible to call the Filter in his publish method.</p>
<p style="margin-top:0;margin-bottom:10px;; margin: 10px 0 0 0">Example:</p>
<div class="code panel" style="border-width: 1px;; border: 1px solid #ccc; background: #f5f5f5; font-size: 12px; line-height: 1.333; font-family: monospace; border: 1px solid #ccc; -moz-border-radius: 3px 3px 3px 3px; border-radius: 3px 3px 3px 3px; margin: 9px 0">
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<pre class="code-java" style="margin: 10px 0 0 0; max-height: 30em; overflow: auto; white-space: pre-wrap; word-wrap: normal">
SLF4JBridgeHandler.removeHandlersForRootLogger();
<span class="code-comment" style="color: #808080">//Handler handler = <span class="code-keyword" style="color: #000091; color: #808080">new</span> ConsoleHandler();
</span>Handler handler = <span class="code-keyword" style="color: #000091">new</span> SLF4JBridgeHandler();
handler.setFilter(<span class="code-keyword" style="color: #000091">new</span> Filter() {
@Override
<span class="code-keyword" style="color: #000091">public</span> <span class="code-object" style="color: #910091">boolean</span> isLoggable(LogRecord record) {
<span class="code-keyword" style="color: #000091">return</span> record.getMessage().startsWith(<span class="code-quote" style="color: #009100">"ShouldBeShown"</span>);
}
});
Logger julLogger = Logger.getLogger(<span class="code-quote" style="color: #009100">"com.myLogger"</span>);
julLogger.addHandler(handler);
julLogger.setLevel(Level.FINEST);
julLogger.info(<span class="code-quote" style="color: #009100">"ShouldNotBeShown info message"</span>);
julLogger.info(<span class="code-quote" style="color: #009100">"ShouldBeShown info message"</span>);
</pre>
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<p style="margin-top:0;margin-bottom:10px;; margin: 10px 0 0 0">Output: </p>
<div class="code panel" style="border-width: 1px;; border: 1px solid #ccc; background: #f5f5f5; font-size: 12px; line-height: 1.333; font-family: monospace; border: 1px solid #ccc; -moz-border-radius: 3px 3px 3px 3px; border-radius: 3px 3px 3px 3px; margin: 9px 0">
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<pre class="code-java" style="margin: 10px 0 0 0; max-height: 30em; overflow: auto; white-space: pre-wrap; word-wrap: normal">
09:39:01.604 [main] INFO com.myLogger - ShouldNotBeShown info message
09:39:01.607 [main] INFO com.myLogger - ShouldBeShown info message
</pre>
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<p style="margin-top:0;margin-bottom:10px;; margin: 10px 0 0 0">If you use the <tt>ConsoleHandler</tt> instead, the output will be as expected:</p>
<div class="code panel" style="border-width: 1px;; border: 1px solid #ccc; background: #f5f5f5; font-size: 12px; line-height: 1.333; font-family: monospace; border: 1px solid #ccc; -moz-border-radius: 3px 3px 3px 3px; border-radius: 3px 3px 3px 3px; margin: 9px 0">
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<pre class="code-java" style="margin: 10px 0 0 0; max-height: 30em; overflow: auto; white-space: pre-wrap; word-wrap: normal">
Nov 25, 2015 9:39:37 AM de.harrassowitz.test.dho.jul.JulFilterTest main
INFO: ShouldBeShown info message
</pre>
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<p style="margin-top:0;margin-bottom:10px;; margin: 10px 0 0 0">Workaround:<br /> Call <tt>java.util.logging.Filter.isLoggable(LogRecord)</tt> yourself:</p>
<div class="code panel" style="border-width: 1px;; border: 1px solid #ccc; background: #f5f5f5; font-size: 12px; line-height: 1.333; font-family: monospace; border: 1px solid #ccc; -moz-border-radius: 3px 3px 3px 3px; border-radius: 3px 3px 3px 3px; margin: 9px 0">
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<pre class="code-java" style="margin: 10px 0 0 0; max-height: 30em; overflow: auto; white-space: pre-wrap; word-wrap: normal">
Handler handler = <span class="code-keyword" style="color: #000091">new</span> SLF4JBridgeHandler() {
@Override
<span class="code-keyword" style="color: #000091">public</span> void publish(LogRecord record) {
<span class="code-keyword" style="color: #000091">if</span> (getFilter() != <span class="code-keyword" style="color: #000091">null</span> && !getFilter().isLoggable(record)) {
<span class="code-keyword" style="color: #000091">return</span>;
}
<span class="code-keyword" style="color: #000091">super</span>.publish(record);
}
};
</pre>
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<p style="margin-top:0;margin-bottom:10px;; margin: 10px 0 0 0">I didn't use <tt>java.util.logging.Handler.isLoggable(LogRecord)</tt> like the other Handlers since that method also checks the Log Level.</p>
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