July 2010 - logback-user - mailman3.qos.ch

Re: [logback-user] TurboFilter scope
by Espen Rydningen 13 Jul '10

13 Jul '10

Hi I want to revisit this subject and theme. I saw that this thread ended 20th May 2008, but I did not find any conclusions on your discussion. The reason I find this subject interesting, is that I have use case which I can't seem to solve in any other way then setting a turbofilter on an appender. This is situation: One enterprise web application, which today uses a proprietary, home built, logging framework, logs statement to both file and to a database via an EJB. I have started the work to replace this logging framework with LogBack/SL4J. Our new design would include a jms queue where we post log messages, and we would use the jms appender to get this done, and a <codeSnippet> logger.debug("Bar property was not defined in abc.properties"); FooLog.log(logcontext, 6001, new String[] { "Bar property was not defined in abc.properties" }, null); </codeSnippet> The logger is the file logger and the FooLog is responsible for sending log message to the EJB <codeSnippet> logger.debug("com.a.b.c.configfile was not defined in abc.properties"); </codeSnippet> <codeSnippet> Marker JMS_MARKER = MarkerFactory.getMarker("JMS"); logger.debug("com.a.b.c.configfile was not defined in abc.properties"); </codeSnippet> This is my use case:

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Integrating OSGi (Felix), Logback and SLF4J
by Sander de Groot 13 Jul '10

13 Jul '10

I'm trying to integrate Logback Classic in Apache Felix. My goal is to have a bundle-based context system so each bundle has it's own logging factory. It's important that each bundle is able to supply it's own configuration file. I've tried a few things and even wrote a simple ContextSelector but I don't seem to get it right. Therefore I thought: before going in a time consuming trial and error process let's ask the experts first. So, my question: how can I create new loggercontexts efficiently with each a separate configuration? Regards, Sander

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Custom appender
by Frank Grimm 13 Jul '10

13 Jul '10

Dear mailing list, I'm trying to use logback (via its slf4j API) in an Eclipe/OSGi environment. More specifically I'm trying to write a logback appender that redirects log events to the Eclipse logging mechanism (org.eclipse.core.runtime.ILog). So the first thing I did was to create an Eclipse plugin/PDE project for the custom appender. In the project, the following class was added: package logback.eclipseappender; import ch.qos.logback.core.AppenderBase; public class EclipseAppender extends AppenderBase<Object> { @Override protected void append(Object eventObject) { // TODO } } The a logback configuration that made use of the custom appender was added to the project, too: <configuration> <appender name="eclipse" class="eclipseappender.EclipseAppender"> <layout class="ch.qos.logback.classic.PatternLayout"> <Pattern>%d %p %t %c - %m%n</Pattern> </layout> </appender> <root level="debug"> <appender-ref ref="eclipse"/> </root> </configuration> When the custom appender plugin/bundle is started in a new Eclipse runtime environment, the appender's class cannot be found (see stacktrace below). I've read in another post (DynamicClassLoadingException - How does class loading in logback works?) that logback might require the logback jar files and the custom appender jar file to be bundled together. But bundling them does not make sense in OSGi environments since single bundles for each of logback's components (core, classic, slf4j API) and custom appenders should be used. Is there a way to make logback see the appender class event if it's in another jar/bundle? Thanks, Frank 11:00:58,210 |-INFO in ch.qos.logback.core.joran.action.AppenderAction - About to instantiate appender of type [eclipseappender.EclipseAppender] 11:00:58,211 |-ERROR in ch.qos.logback.core.joran.action.AppenderAction - Could not create an Appender of type [eclipseappender.EclipseAppender]. ch.qos.logback.core.util.DynamicClassLoadingException: Failed to instantiate type eclipseappender.EclipseAppender at ch.qos.logback.core.util.DynamicClassLoadingException: Failed to instantiate type eclipseappender.EclipseAppender at at ch.qos.logback.core.util.OptionHelper.instantiateByClassName(OptionHelper.java:53) [...] Caused by: java.lang.ClassNotFoundException: eclipseappender.EclipseAppender at at org.eclipse.osgi.internal.loader.BundleLoader.findClassInternal(BundleLoader.java:506) at at org.eclipse.osgi.internal.loader.BundleLoader.findClass(BundleLoader.java:422) at at org.eclipse.osgi.internal.loader.BundleLoader.findClass(BundleLoader.java:410) at at org.eclipse.osgi.internal.baseadaptor.DefaultClassLoader.loadClass(DefaultClassLoader.java:107) at at java.lang.ClassLoader.loadClass(ClassLoader.java:248) at at ch.qos.logback.core.util.OptionHelper.instantiateByClassName(OptionHelper.java:45) at ... 52 common frames omitted

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logback
by Kaushal Shriyan 13 Jul '10

13 Jul '10

Hi Is there a howto for setting up logback on tomcat application server 5.5.27 Thanks, Kaushal

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Using logback from tomcat and webapp
by Justin Nixon 12 Jul '10

12 Jul '10

Hi, I'm trying to use logback for both tomcat internal logging and for all logging from my web app. I was able to accomplish routing all logging through logback by placing logback-classic, logback-core and jcl-over-slf4j into my Tomcat 5.5\common\lib directory and the corresponding logback.xml file into the Tomcat 5.5\common\classes. However, I'm unable to use any custom layouts and appenders. Is there a recommended way to include another logback.xml file in my webapp so that I can use custom layouts and appenders? I'm experimenting with JoranConfigurator, but I haven't had any luck yet. Thanks in advance. Regards, Justin

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Help with Tomcat -> GUI Viewer logging setup
by Steve Johnson 09 Jul '10

09 Jul '10

Greetings, I apologize in advance if my question is obviously documented somewhere already. If so, I haven't been able to find those docs and would welcome being simply pointed to them. I'm looking to switch to Logback after years of struggling with log4j and chainsaw within a Tomcat environment. I'm hoping to get some advice up front to save me frustration in getting to what I want with Logback. What I'd like to do is have multiple web applications running in a single Linux hosted Tomcat instance log to the same log stream. I'd like this stream to be viewable on a remote Windows workstation via a GUI app (via Lilith, I guess). Preferably, multiple GUIs on different workstations ought to be able to view the log stream simultaneously. Also, it would be great if something like ZeroConf could be used such that no mucking with config files and IP addresses will be necessary. I've had some luck getting all of this going with log4j and chainsaw, but the system has always been kinda flakey. I had everything set up with ZeroConf, but I had to write my own version of the ZeroConfSocketHubAppender to bump the port number when a socket bind failed to deal with the fact that multiple appenders would be created by my various web applications and would otherwise all contend for the same local port. I want something more reliable and robust. So, can anyone offer suggestions for getting to such a setup with Logback? Which sort of appender should I use? What gotchas should I be aware of? I quickly reviewed the document "Access log with logback, Jetty and Tomcat", but I find that document kinda confusing. Does this module simply offer a web interface to logs, or is it something more? Would it be any help in my situation if I'm not interested in accessing logs via HTTP? TIA for any help you can provide. Steve

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Time based rolling policy
by Kaushal Shriyan 09 Jul '10

09 Jul '10

Hi, I am referring to http://logback.qos.ch/manual/appenders.html#TimeBasedRollingPolicy. Below is the log4j.properties. log4j.rootLogger=INFO, R log4j.appender.R=org.apache.log4j.DailyRollingFileAppender log4j.appender.R.File=${catalina.home}/logs/catalina.out log4j.appender.R.DatePattern='.'yyyy-MM-dd log4j.appender.R.layout=org.apache.log4j.PatternLayout Basically if i set log4j.appender.R.DatePattern='.'yyyy-MM-dd in log4j.properties It rolls over at midnight. is there a way to roll over at say 12:00 Noon afternoon I think its possible using TimeBasedRollingPolicy but not sure how to use it. Please help me understand with examples Thanks and Regards Kaushal

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Groovy equivalent of logback-test.xml
by Grzegorz Borkowski 08 Jul '10

08 Jul '10

Now when we can replace logback.xml with logback.groovy, what happened to logback-test.xml? I see no hint in documentation what to do with it. For sure there is no point in having one file written in groovy, and another one (for tests) in XML. So will logback-test.groovy work? Greg

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logback usage with security
by David Savage 07 Jul '10

07 Jul '10

Hi there, I've just run into a problem with using logback in a jvm where the security manager is enabled. The trace of the exception is as follows: java.security.AccessControlException: access denied (java.lang.RuntimePermission getClassLoader) at java.security.AccessControlContext.checkPermission(AccessControlContext.java:323) at java.security.AccessController.checkPermission(AccessController.java:546) at java.lang.SecurityManager.checkPermission(SecurityManager.java:532) at java.lang.Class.getClassLoader(Class.java:594) at ch.qos.logback.classic.spi.PackagingDataCalculator.populateFrames(PackagingDataCalculator.java:87) at ch.qos.logback.classic.spi.PackagingDataCalculator.calculate(PackagingDataCalculator.java:58) at ch.qos.logback.classic.spi.ThrowableProxy.calculatePackagingData(ThrowableProxy.java:100) at ch.qos.logback.classic.spi.LoggingEvent.<init>(LoggingEvent.java:126) at ch.qos.logback.classic.Logger.buildLoggingEventAndAppend(Logger.java:469) at ch.qos.logback.classic.Logger.filterAndLog_0_Or3Plus(Logger.java:425) at ch.qos.logback.classic.Logger.info(Logger.java:645) This is running with a logback-classic-0.9.23-SNAPSHOT that I pulled and built a couple of days ago. Looking at the code it seems the PackagingDataCalculator should be calling getClassLoader in an AccessController.doPriviledged block - but potentially this could also happen higher up to avoid having to put micro checks in all over the place. This leads me to a couple of questions: * Is logback generally dealing with security related checks and this is just one that's slipped through? * From the call stack it seems the ThrowableProxy is doing quite a lot of work in the user thread - is there any way to configure logback to do this asynchronously? Thanks in advance, Regards, Dave

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Appender Ref Default Value
by David Harrigan 02 Jul '10

02 Jul '10

Hiya, I love the fact that in logback I can do this for a level: <logger name="foo" level="${foo.bar.log.level:-debug}"/> I would love to be able to do the following as well: <appender-ref ref="${foo.bar.log.appender:-console}"/> So that I can switch between different appenders during build time. At the moment, If I try that, I get this warning from logback (0.9.21) 11:17:32,676 |-ERROR in ch.qos.logback.core.joran.action.AppenderRefAction - Could not find an appender named [${foo.bar.log.appender:-console}]. Did you define it below in the config file? 11:17:32,676 |-ERROR in ch.qos.logback.core.joran.action.AppenderRefAction - See http://logback.qos.ch/codes.html#appender_order for more details. Is this achievable? -=david=- -- View this message in context: http://old.nabble.com/Appender-Ref-Default-Value-tp28605941p28605941.html Sent from the Logback User mailing list archive at Nabble.com.

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