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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-347" style="color: #3b73af; text-decoration: none"><img src="cid:jira-generated-image-static-improvement-c9084f5e-2abc-4879-bd12-b6a20f668c35" height="16" width="16" border="0" align="absmiddle" alt="Improvement" style="vertical-align: text-bottom" /></a> <a href="http://jira.qos.ch/browse/SLF4J-347" style="color: #3b73af; text-decoration: none">SLF4J-347</a>
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<td style="vertical-align: top;; padding: 0px; border-collapse: collapse; padding-right: 5px; font-size: 20px; line-height: 30px; mso-line-height-rule: exactly" class="page-title-pattern-header-container"> <span class="page-title-pattern-header" style="font-family: Arial, sans-serif; padding: 0; font-size: 20px; line-height: 30px; mso-text-raise: 2px; mso-line-height-rule: exactly; vertical-align: middle"> <a href="http://jira.qos.ch/browse/SLF4J-347" style="color: #3b73af; text-decoration: none">Inconsistent use of singleton pattern in Binder classes</a> </span>
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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-improvement-c9084f5e-2abc-4879-bd12-b6a20f668c35" height="16" width="16" border="0" align="absmiddle" alt="Improvement" style="vertical-align: text-bottom" /> Improvement
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Affects Versions:
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1.7.x
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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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Core API
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Created:
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27/Dec/15 1:42 AM
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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="rufoa" id="email_rufoa" href="http://jira.qos.ch/secure/ViewProfile.jspa?name=rufoa" style="color:#3b73af;; color: #3b73af; text-decoration: none">rufoa</a>
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<p style="margin-top:0;margin-bottom:10px;; margin: 10px 0 0 0">Can somebody please explain why <a href="https://github.com/qos-ch/slf4j/blob/2b23d26bb008b9eec151cc8244deec3bb4eed778/slf4j-nop/src/main/java/org/slf4j/impl/StaticMarkerBinder.java#L44" class="external-link" rel="nofollow" style="color: #3b73af; text-decoration: none">StaticMarkerBinder</a> and <a href="https://github.com/qos-ch/slf4j/blob/2b23d26bb008b9eec151cc8244deec3bb4eed778/slf4j-nop/src/main/java/org/slf4j/impl/StaticMDCBinder.java#L40" class="external-link" rel="nofollow" style="color: #3b73af; text-decoration: none">StaticMDCBinder</a> implement the singleton pattern using a public field, whereas <a href="https://github.com/qos-ch/slf4j/blob/2b23d26bb008b9eec151cc8244deec3bb4eed778/slf4j-nop/src/main/java/org/slf4j/impl/StaticLoggerBinder.java#L51" class="external-link" rel="nofollow" style="color: #3b73af; text-decoration: none">StaticLoggerBinder</a> has a private field and a public getter method?</p>
<p style="margin-top:0;margin-bottom:10px;; margin: 10px 0 0 0">I'm working on making a Clojure logging framework compatible with SLF4J, and this reliance of StaticMarkerBinder and StaticMDCBinder on public fields rather than getters is <a href="https://github.com/fzakaria/slf4j-timbre/issues/8" class="external-link" rel="nofollow" style="color: #3b73af; text-decoration: none">causing problems</a> because Clojure, being functional, does not allow us to expose public fields in classes - only methods.</p>
<p style="margin-top:0;margin-bottom:10px;; margin: 10px 0 0 0">It looks like StaticMarkerBinder.SINGLETON is only referenced <a href="https://github.com/qos-ch/slf4j/blob/2b23d26bb008b9eec151cc8244deec3bb4eed778/slf4j-api/src/main/java/org/slf4j/MarkerFactory.java#L52" class="external-link" rel="nofollow" style="color: #3b73af; text-decoration: none">here</a>, and StaticMDCBinder.SINGLETON is only referenced <a href="https://github.com/qos-ch/slf4j/blob/2b23d26bb008b9eec151cc8244deec3bb4eed778/slf4j-api/src/main/java/org/slf4j/MDC.java#L90" class="external-link" rel="nofollow" style="color: #3b73af; text-decoration: none">here</a>. Is there a technical reason why these access the fields directly, or is it just the result of an early decision being frozen into the API?</p>
<p style="margin-top:0;margin-bottom:10px;; margin: 10px 0 0 0">Many thanks</p>
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