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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/LOGBACK" style="color: #3b73af; text-decoration: none">logback</a> / <a href="http://jira.qos.ch/browse/LOGBACK-1140" style="color: #3b73af; text-decoration: none"><img src="cid:jira-generated-image-static-bug-9b1a97c1-7b07-4dbd-aa03-239a69062320" height="16" width="16" border="0" align="absmiddle" alt="Bug" style="vertical-align: text-bottom" /></a> <a href="http://jira.qos.ch/browse/LOGBACK-1140" style="color: #3b73af; text-decoration: none">LOGBACK-1140</a>
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Issue Type:
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Affects Versions:
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1.1.5
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Assignee:
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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="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:#3b73af;; color: #3b73af; text-decoration: none">Logback dev list</a>
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Components:
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logback-core
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Created:
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24/Feb/16 8:40 PM
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Environment:
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<p style="margin-top:0;margin-bottom:10px;; margin: 10px 0 0 0">Windows 7</p>
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substitution variable Property
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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="ecook" id="email_ecook" href="http://jira.qos.ch/secure/ViewProfile.jspa?name=ecook" style="color:#3b73af;; color: #3b73af; text-decoration: none">Eric C</a>
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<p style="margin-top:0;margin-bottom:10px;; margin: 10px 0 0 0">When using a variable whose value ends with a colon, that colon is removed when the variable is evaluated.</p>
<p style="margin-top:0;margin-bottom:10px;; margin: 10px 0 0 0">For example, I have a property file.</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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<b>my.properties</b>
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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">
root=C\:
</pre>
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<p style="margin-top:0;margin-bottom:10px;; margin: 10px 0 0 0">I want to use that variable to configure my logging. Example is abbreviated to highlight the usage.</p>
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<b>logback.xml</b>
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<pre class="code-xml" style="margin: 10px 0 0 0; max-height: 30em; overflow: auto; white-space: pre-wrap; word-wrap: normal">
<span class="code-tag" style="color: #000091"><configuration></span>
<span class="code-tag" style="color: #000091"><property resource=<span class="code-quote" style="color: #009100">"my.properties"</span>/></span>
<span class="code-tag" style="color: #000091"><appender></span>
<span class="code-tag" style="color: #000091"><file></span>${root}/out.log<span class="code-tag" style="color: #000091"></file></span>
<span class="code-tag" style="color: #000091"></appender></span>
<span class="code-tag" style="color: #000091"></configuration></span>
</pre>
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<p style="margin-top:0;margin-bottom:10px;; margin: 10px 0 0 0">This produces the following log output in the default logs.</p>
<p style="margin-top:0;margin-bottom:10px;; margin: 10px 0 0 0"><tt>Will use the pattern C/out.log for the active file</tt></p>
<p style="margin-top:0;margin-bottom:10px;; margin: 10px 0 0 0">Test case to prove the issue. Using NodeToStringTransformerTest as a base.</p>
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<b>logback-core/src/test/java/ch/qos/logback/core/subst/NodeToStringTransformerTest.java</b>
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<pre class="code-java" style="margin: 10px 0 0 0; max-height: 30em; overflow: auto; white-space: pre-wrap; word-wrap: normal">
@Before
<span class="code-keyword" style="color: #000091">public</span> void setUp() {
<span class="code-comment" style="color: #808080">// existing setup
</span> propertyContainer0.putProperty(<span class="code-quote" style="color: #009100">"root"</span>, <span class="code-quote" style="color: #009100">"C:"</span>);
}
@Test
<span class="code-keyword" style="color: #000091">public</span> void trailingColon() <span class="code-keyword" style="color: #000091">throws</span> ScanException {
<span class="code-object" style="color: #910091">String</span> input = <span class="code-quote" style="color: #009100">"${root}"</span>;
Node node = makeNode(input);
NodeToStringTransformer nodeToStringTransformer = <span class="code-keyword" style="color: #000091">new</span> NodeToStringTransformer(node, propertyContainer0);
assertEquals(<span class="code-quote" style="color: #009100">"C:"</span>, nodeToStringTransformer.transform());
}
</pre>
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<p style="margin-top:0;margin-bottom:10px;; margin: 10px 0 0 0">Test failure output.</p>
<p style="margin-top:0;margin-bottom:10px;; margin: 10px 0 0 0"><tt>expected:<C[:]> but was:<C[]></tt></p>
<p style="margin-top:0;margin-bottom:10px;; margin: 10px 0 0 0">The workaround is easy enough: don't let properties end in a colon. Looks bad, but works.</p>
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<b>fix.properties</b>
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<div class="codeContent panelContent" style="padding: 9px 12px">
<pre class="code-java" style="margin: 10px 0 0 0; max-height: 30em; overflow: auto; white-space: pre-wrap; word-wrap: normal">
root=C\:/
</pre>
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<b>logback.xml</b>
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<div class="codeContent panelContent" style="padding: 9px 12px">
<pre class="code-java" style="margin: 10px 0 0 0; max-height: 30em; overflow: auto; white-space: pre-wrap; word-wrap: normal">
<configuration>
<property resource=<span class="code-quote" style="color: #009100">"fix.properties"</span>/>
<appender>
<file>${root}out.log</file>
</appender>
</configuration>
</pre>
</div>
</div>
<p style="margin-top:0;margin-bottom:10px;; margin: 10px 0 0 0">However, this isn't always possible. My application has a ${root} property that is assumed to be the drive/network path only, and all application paths include a leading directory slash. I can create a separate property, but having two different properties that look similar but are used in two different places is bad for maintenance.</p>
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