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POHow can I configure system properties or logback configuration variables from typesafe config?
 

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  1. POHow can I configure system properties or logback configuration variables from typesafe config?
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    <p>I have variables with defaults in my <code>logback.xml</code> configuration file, and I would like to be able to optionally set these variables from my typesafe config <code>application.conf</code> file. </p> <p>I am deploying the application using one-jar, and the <code>application.conf</code> file packaged up in the deployable jar contains defaults. I pass <code>-Dconfig.file=foo.conf</code> on execution to provide the path to a server-specific config file.</p> <p>Right now I can also pass <code>-Dlog.level</code> and other variables to override my defaults in <code>logback.xml</code>, and I also have to pass <code>-Dfile.encoding=UTF-8</code> on the command line. I'm looking for a way to be able to specify these properties in the typesafe config instead of on the command line. It feels like there should be a way to do it, but I can't find the magic words.</p> <p><strong>logback.xml:</strong></p> <pre><code>&lt;configuration&gt; &lt;appender name="FILE" class="ch.qos.logback.core.rolling.RollingFileAppender"&gt; &lt;file&gt;${log.path:-logs/}/${log.file:-myLog.log}&lt;/file&gt; &lt;rollingPolicy class="ch.qos.logback.core.rolling.TimeBasedRollingPolicy"&gt; &lt;!-- daily rollover --&gt; &lt;fileNamePattern&gt;logFile.%d{yyyy-MM-dd}.log&lt;/fileNamePattern&gt; &lt;!-- keep 15 days' worth of history --&gt; &lt;maxHistory&gt;${log.history.days:-15}&lt;/maxHistory&gt; &lt;/rollingPolicy&gt; &lt;encoder&gt; &lt;pattern&gt;%-4relative [%thread] %-5level %logger{35} - %msg%n&lt;/pattern&gt; &lt;/encoder&gt; &lt;/appender&gt; &lt;root level="${log.level:-INFO}"&gt; &lt;appender-ref ref="FILE" /&gt; &lt;/root&gt; &lt;/configuration&gt; </code></pre> <p><strong>application.conf (bundled):</strong></p> <pre><code>akka { log-config-on-start = false event-handlers = ["akka.event.slf4j.Slf4jEventHandler"] } </code></pre> <p><strong>sample server-specific app.conf:</strong></p> <pre><code>include "/application.conf" akka.log-config-on-start = true log.level = WARN // this is what I'd LIKE to be able to do </code></pre> <p><strong>How I'm currently running the app:</strong></p> <pre><code>java -Dfile.encoding=UTF-8 -Dconfig.file=myApp.conf -Dlog.level=WARN -jar myApp_2.10-0.1-one-jar.jar </code></pre>
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      1. VTUpMod
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