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<a class="user-hover" rel="binkley" id="email_binkley" href="http://jira.qos.ch/secure/ViewProfile.jspa?name=binkley" style="color:#326ca6;">B. K. Oxley (binkley)</a>
created <img src="http://jira.qos.ch/images/icons/issuetypes/newfeature.png" 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-939'>LOGBACK-939</a>
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<a style='color:#326ca6;text-decoration:none;' href='http://jira.qos.ch/browse/LOGBACK-939'><strong>add %match(...) converter for pattern layout</strong></a>
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<strong style="font-weight:normal;color:#505050;">Issue Type:</strong>
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<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/newfeature.png" height="16" width="16" border="0" align="absmiddle" alt="New Feature"> New Feature
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<strong style="font-weight:normal;color:#505050;">Affects Versions:</strong>
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<td style="color:#000000;font-family:Arial,FreeSans,Helvetica,sans-serif;font-size:12px;padding:0 0 10px 0;width:100%;">
1.0.13 </td>
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<strong style="font-weight:normal;color:#505050;">Assignee:</strong>
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<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>
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<strong style="font-weight:normal;color:#505050;">Components:</strong>
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<td style="color:#000000;font-family:Arial,FreeSans,Helvetica,sans-serif;font-size:12px;padding:0 0 10px 0;width:100%;">
logback-classic </td>
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<strong style="font-weight:normal;color:#505050;">Created:</strong>
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<td style="color:#000000;font-family:Arial,FreeSans,Helvetica,sans-serif;font-size:12px;padding:0 0 10px 0;width:100%;">
23/Jan/14 10:39 AM
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<strong style="font-weight:normal;color:#505050;">Description:</strong>
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<p style='margin-top:0;margin-bottom:10px;'>Add a %match converter:</p>
<p style='margin-top:0;margin-bottom:10px;'>import ch.qos.logback.classic.PatternLayout;<br/>
import ch.qos.logback.classic.pattern.ClassicConverter;<br/>
import ch.qos.logback.classic.spi.ILoggingEvent;<br/>
import ch.qos.logback.core.boolex.EvaluationException;<br/>
import ch.qos.logback.core.boolex.EventEvaluator;<br/>
import ch.qos.logback.core.status.ErrorStatus;</p>
<p style='margin-top:0;margin-bottom:10px;'>import javax.annotation.Nonnull;<br/>
import java.util.LinkedHashMap;<br/>
import java.util.List;<br/>
import java.util.Map;<br/>
import java.util.Objects;</p>
<p style='margin-top:0;margin-bottom:10px;'>import static ch.qos.logback.core.CoreConstants.EVALUATOR_MAP;<br/>
import static java.util.Collections.emptyMap;</p>
<p style='margin-top:0;margin-bottom:10px;'>/**</p>
<ul>
<li>{@code MarkedConverter}
<p style='margin-top:0;margin-bottom:10px;'> provides alternate conversions based on conditions. Enable with:</p></li>
<li><pre></li>
<li><conversionRule</li>
<li>conversionWord="match"</li>
<li>converterClass="mbl.laboratory.util.logging.osi.MatchConverter"/></pre> Use as:</li>
<li><pre></li>
<li><pattern>%match
{cond1,patt1,...,fallback}
<p style='margin-top:0;margin-bottom:10px;'></pattern></pre> Example:</p></li>
<li><pre></li>
<li><evaluator name="WITH_MARKER"></li>
<li><expression>null != marker ∓∓ "ALERT".equals(marker.getName())</expression></li>
<li></evaluator></li>
<li><pattern>%match(WITH_MARKER,%marker/%level,%level)</pattern></pre> will log</li>
<li>"ALERT/ERROR" when marker is "ALERT" and level is "ERROR", otherwise just "ERROR".<br/>
*</li>
<li>@author <a href="mailto:Brian.Oxley@macquarie.com">Brian Oxley</a></li>
<li>@todo Fix error reporting - logback swallows<br/>
*/<br/>
public final class MatchConverter<br/>
extends ClassicConverter {<br/>
private static final int MAX_ERROR_COUNT = 4;<br/>
private Map<String, String> conditions;<br/>
private String unmatched;<br/>
private Map<String, EventEvaluator<ILoggingEvent>> evaluators;<br/>
private int errors;</li>
</ul>
<p style='margin-top:0;margin-bottom:10px;'> @Override<br/>
public void start() {<br/>
final List<String> options = getOptionList();<br/>
if (null == options || 2 > options.size()) </p>
{
addError("Missing options for %match - " + Objects.toString(options));
conditions = emptyMap();
unmatched = "";
return;
}
<p style='margin-top:0;margin-bottom:10px;'> conditions = new LinkedHashMap<>();<br/>
for (int i = 0; i < options.size() - 1; i += 2)<br/>
conditions.put(options.get<img class="emoticon" src="http://jira.qos.ch/images/icons/emoticons/information.gif" height="16" width="16" align="absmiddle" alt="" border="0"/>, options.get(i + 1));<br/>
unmatched = 0 == options.size() % 2 ? "" : options.get(options.size() - 1);</p>
<p style='margin-top:0;margin-bottom:10px;'> evaluators = (Map<String, EventEvaluator<ILoggingEvent>>) getContext()<br/>
.getObject(EVALUATOR_MAP);</p>
<p style='margin-top:0;margin-bottom:10px;'> super.start();<br/>
}</p>
<p style='margin-top:0;margin-bottom:10px;'> @Nonnull<br/>
@Override<br/>
public String convert(@Nonnull final ILoggingEvent event) </p>
{
for (final Map.Entry<String, String> entry : conditions.entrySet())
if (evaluate(entry.getKey(), event))
return relayout(entry.getValue(), event);
return relayout(unmatched, event);
}
<p style='margin-top:0;margin-bottom:10px;'> private boolean evaluate(final String name, final ILoggingEvent event) {<br/>
final EventEvaluator<ILoggingEvent> evaluator = evaluators.get(name);<br/>
try </p>
{
return null != evaluator && evaluator.evaluate(event);
}
<p style='margin-top:0;margin-bottom:10px;'> catch (final EvaluationException e) {<br/>
errors++;<br/>
if (errors < MAX_ERROR_COUNT) </p>
{
addError("Exception thrown for evaluator named [" + evaluator.getName() + "]", e);
}
<p style='margin-top:0;margin-bottom:10px;'> else if (errors == MAX_ERROR_COUNT) </p>
{
ErrorStatus errorStatus = new ErrorStatus(
"Exception thrown for evaluator named [" + evaluator.getName() + "].", this,
e);
errorStatus.add(new ErrorStatus(
"This was the last warning about this evaluator's errors."
+ "We don't want the StatusManager to get flooded.", this));
addStatus(errorStatus);
}
<p style='margin-top:0;margin-bottom:10px;'> return false;<br/>
}<br/>
}</p>
<p style='margin-top:0;margin-bottom:10px;'> private String relayout(final String pattern, final ILoggingEvent event) </p>
{
final PatternLayout layout = new PatternLayout();
layout.setContext(getContext());
layout.setPattern(pattern);
layout.start();
return layout.doLayout(event);
}
<p style='margin-top:0;margin-bottom:10px;'>}</p>
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<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>
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<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
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<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="binkley" id="email_binkley" href="http://jira.qos.ch/secure/ViewProfile.jspa?name=binkley" style="color:#326ca6;">B. K. Oxley (binkley)</a>
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