<html><head><meta http-equiv="Content-Type" content="text/html charset=utf-8"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;" class=""><div class="">Hi,</div><div class=""><br class=""></div><div class="">There are two ways to deal with this.</div><div class=""><br class=""></div><div class="">1) Put your log initialisation at the top of your main() method, so nothing else can run first.</div><div class=""><br class=""></div><div class="">2) Specify the app name as a system property on the command line:</div><div class=""><br class=""></div><div class=""> java -Dapp.name=MyApp -jar myappjar </div><div class=""><br class=""></div><div class="">Thanks</div><div class=""><br class=""></div><div class="">David</div><br class=""><div><blockquote type="cite" class=""><div class="">On 10 Jun 2016, at 10:20, Brice Dutheil <<a href="mailto:brice.dutheil@gmail.com" class="">brice.dutheil@gmail.com</a>> wrote:</div><br class="Apple-interchange-newline"><div class=""><div dir="ltr" class=""><div class="markdown-here-wrapper" style=""><p style="margin:0px 0px 1.2em!important" class="">Hi,</p><p style="margin:0px 0px 1.2em!important" class="">I would like share a single log configuration for two web-apps that run on the same container. Yet I want each web-app to log in separate files.</p><p style="margin:0px 0px 1.2em!important" class="">I tried different approach the best one is actually very close to some solution I later found on the FAQ : <a href="http://logback.qos.ch/faq.html#sharedConfiguration" class="">http://logback.qos.ch/faq.html#sharedConfiguration</a></p>
<pre style="font-size:0.85em;font-family:Consolas,Inconsolata,Courier,monospace;font-size:1em;line-height:1.2em;margin:1.2em 0px" class=""><code class="language-java hljs" style="font-size:0.85em;font-family:Consolas,Inconsolata,Courier,monospace;margin:0px 0.15em;padding:0px 0.3em;white-space:pre-wrap;border:1px solid rgb(234,234,234);border-radius:3px;display:inline;background-color:rgb(248,248,248);white-space:pre;overflow:auto;border-radius:3px;border:1px solid rgb(204,204,204);padding:0.5em 0.7em;display:block!important;display:block;overflow-x:auto;padding:0.5em;color:rgb(209,217,225);background:rgb(71,73,73)">LoggerContext loggerContext = (LoggerContext) LoggerFactory.getILoggerFactory();
JoranConfigurator jc = <span class="hljs-keyword" style="color:rgb(204,153,204)">new</span> JoranConfigurator();
jc.setContext(loggerContext);
loggerContext.reset();
loggerContext.setName(appName); <span class="hljs-comment" style="color:rgb(150,152,150);font-style:italic">// use ${CONTEXT_NAME} in logback.xml</span>
jc.doConfigure(Objects.requireNonNull(source, <span class="hljs-string" style="color:rgb(138,190,183)">"Logback configuration is missing"</span>));
</code></pre><p style="margin:0px 0px 1.2em!important" class="">However for operation reasons we pass the configuration via the system property <code style="font-size:0.85em;font-family:Consolas,Inconsolata,Courier,monospace;margin:0px 0.15em;padding:0px 0.3em;white-space:pre-wrap;border:1px solid rgb(234,234,234);border-radius:3px;display:inline;background-color:rgb(248,248,248)" class="">logback.configurationFile</code>, so what happens is that the first call to <code style="font-size:0.85em;font-family:Consolas,Inconsolata,Courier,monospace;margin:0px 0.15em;padding:0px 0.3em;white-space:pre-wrap;border:1px solid rgb(234,234,234);border-radius:3px;display:inline;background-color:rgb(248,248,248)" class="">LoggerFactory.getILoggerFactory()</code> initialise the LoggerContext and creates files with non initialised variables.</p><p style="margin:0px 0px 1.2em!important" class="">As I’m using the context name, the file names have <code style="font-size:0.85em;font-family:Consolas,Inconsolata,Courier,monospace;margin:0px 0.15em;padding:0px 0.3em;white-space:pre-wrap;border:1px solid rgb(234,234,234);border-radius:3px;display:inline;background-color:rgb(248,248,248)" class="">default</code> in their name (this is the default value of the context name), if using variable I get a filename with <code style="font-size:0.85em;font-family:Consolas,Inconsolata,Courier,monospace;margin:0px 0.15em;padding:0px 0.3em;white-space:pre-wrap;border:1px solid rgb(234,234,234);border-radius:3px;display:inline;background-color:rgb(248,248,248)" class="">my-var-name_IS_UNDEFINED</code>.</p><p style="margin:0px 0px 1.2em!important" class=""><strong class="">The question is :</strong> Is there proper way anyway to avoid this pre-initialisation to avoid creating this empty file ?</p><p style="margin:0px 0px 1.2em!important" class="">I didn’t found any way to hook in the <code style="font-size:0.85em;font-family:Consolas,Inconsolata,Courier,monospace;margin:0px 0.15em;padding:0px 0.3em;white-space:pre-wrap;border:1px solid rgb(234,234,234);border-radius:3px;display:inline;background-color:rgb(248,248,248)" class="">org.slf4j.LoggerFactory</code> or <code style="font-size:0.85em;font-family:Consolas,Inconsolata,Courier,monospace;margin:0px 0.15em;padding:0px 0.3em;white-space:pre-wrap;border:1px solid rgb(234,234,234);border-radius:3px;display:inline;background-color:rgb(248,248,248)" class="">org.slf4j.impl.StaticLoggerBinder</code> (of logback-classic).</p><p style="margin:0px 0px 1.2em!important" class="">— Brice</p>
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