October 2010 - logback-user

Coloring log messages
by Vaibhav Malhotra 29 Oct '10

29 Oct '10

Hi all I am quire fascinated about the powers and ease logback gives to its users. I am experimenting with various options it offers like appenders, encoders etc.Recently I though if we could color code the log messages for various logging levels. For example, red for Error, Green for Trace etc. I have these options with me but none seemed to work as desired: - Extending <code> ClassicConverter </code> & overriding <code> convert(ILoggingEvent) </code> as given in the documentation chapter 6 for Creating a custom conversion specifier. This way, I could color the level using <code> event.getLevel() </code> but *could not color the entire log statement* as per my wish. - On the page http://logback.qos.ch/demo.html it is written that "You can color log statements with markers. Markers are part of the SLF4J API." But I could not find any example for that. - I tried extending <code> RollingFileAppender </code> and in the <code> subAppend </code> I tried to access <code>quirtWriter qs </code> as one could do in earlier versions, but now <code> qs </code> is not visible. Please guide for the appropriate way of doing it as well as provide some directions / examples. Thanks & Regards Vaibhav Malhotra

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Legacy Log4j Question
by Jeremy.Truelove＠barclayscapital.com 27 Oct '10

27 Oct '10

So I've been porting some of our services to use Logback over log4j and I've been using the log4j-over-slf4j jar to spoof log4j for our legacy dependencies. The only issue is log4j-over-slf4j doesn't implement many of the classes of log4j so I'm seeing a decent few class not found exceptions from dependent jars. How have people got around this? Is it enough to just put the nlog4j in your classpath instead of the log4j-over-slf4j jar? I'd still like to use one logback config file to drive all my logging to a single log file. Thanks. jt _______________________________________________ This e-mail may contain information that is confidential, privileged or otherwise protected from disclosure. If you are not an intended recipient of this e-mail, do not duplicate or redistribute it by any means. Please delete it and any attachments and notify the sender that you have received it in error. Unless specifically indicated, this e-mail is not an offer to buy or sell or a solicitation to buy or sell any securities, investment products or other financial product or service, an official confirmation of any transaction, or an official statement of Barclays. Any views or opinions presented are solely those of the author and do not necessarily represent those of Barclays. This e-mail is subject to terms available at the following link: www.barcap.com/emaildisclaimer. By messaging with Barclays you consent to the foregoing. Barclays Capital is the investment banking division of Barclays Bank PLC, a company registered in England (number 1026167) with its registered office at 1 Churchill Place, London, E14 5HP. This email may relate to or be sent from other members of the Barclays Group. _______________________________________________

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FileAppender Performance without IOBuffering
by Kenneth.Lam＠barclayscapital.com 25 Oct '10

25 Oct '10

Hi, We're looking to use Logback with one of our services to aid in metrics recording. I've noticed that the ability to use any form of buffered IO with the FileAppender class was removed. The reason cited was that significant performance testing showed little benefit in doing so. I was wondering if anybody could provide more detail concerning the environment and conditions that this testing was done. We will generally be logging entries on the order of 1000's to 10,000's entries per second. Does anybody know if Logback can handle this type of loading? Thanks. _______________________________________________ This e-mail may contain information that is confidential, privileged or otherwise protected from disclosure. If you are not an intended recipient of this e-mail, do not duplicate or redistribute it by any means. Please delete it and any attachments and notify the sender that you have received it in error. Unless specifically indicated, this e-mail is not an offer to buy or sell or a solicitation to buy or sell any securities, investment products or other financial product or service, an official confirmation of any transaction, or an official statement of Barclays. Any views or opinions presented are solely those of the author and do not necessarily represent those of Barclays. This e-mail is subject to terms available at the following link: www.barcap.com/emaildisclaimer. By messaging with Barclays you consent to the foregoing. Barclays Capital is the investment banking division of Barclays Bank PLC, a company registered in England (number 1026167) with its registered office at 1 Churchill Place, London, E14 5HP. This email may relate to or be sent from other members of the Barclays Group. _______________________________________________

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CyclicBuffer size in SmtpAppender
by Dawson Mossman 20 Oct '10

20 Oct '10

Hi, does anyone know how to change the CyclicBuffer size in the SmtpAppender? When an error occurs and an email is sent via the Appender, I only want it to show the most recent error (no contextual information required). It currently stores 256 contextual logs. Logback version: 0.9.25 When I look at the source code for the SMTPAppender, there is a variable named "buffersize", but is not used anywhere in the class. The line directly below it used to use the variable, but it's been commented out. private int bufferSize = 512; //protected CyclicBuffer<ILoggingEvent> cb = new CyclicBuffer<ILoggingEvent>(bufferSize); Can I use a custom evaluator to do this? Or do I need to write a new custom SMTPAppender? Even in the later case, I'm not sure where the buffer size is being defined? Thanks, Dawson

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Release of logback v0.9.26
by Ceki Gülcü 20 Oct '10

20 Oct '10

Hello all, I am happy to announce the release of logback version 0.9.26. Please refer to the news page for precise details. http://logback.qos.ch/news.html You can download logback, including full source code, class files and documentation on our download page, shown below. http://logback.qos.ch/download.html You can receive logback related announcements by subscribing to the QOS.ch announce mailing list. To subscribe to QOS.ch announce list, please visit the following URL. http://www.qos.ch/mailman/listinfo/announce Enjoy, -- Ceki

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exclude a logger in root logger
by LongkerDandy 16 Oct '10

16 Oct '10

Hi I've write a config like this <configuration> <appender name="Chii2FILE" class="ch.qos.logback.core.FileAppender"> <file>log/chii2.log</file> <encoder> <pattern>%date{yyyy-MM-dd HH:mm:ss} [%level] %logger{50} [%file:%line] %msg%n</pattern> </encoder> </appender> <appender name="FILE" class="ch.qos.logback.core.FileAppender"> <file>log/platform.log</file> <encoder> <pattern>%date{yyyy-MM-dd HH:mm:ss} [%level] %logger{50} [%file:%line] %msg%n</pattern> </encoder> </appender> <logger name="org.chii2" level="debug"> <appender-ref ref="Chii2FILE"/> </logger> <root level="warn"> <appender-ref ref="FILE" /> </root> </configuration> The problem is, all the log in chii2.log will repeat in platform.log. I want separate my project's log from others. How can I do that? Regards LongkerDandy

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RollingFile appender does not roll but copies files
by Alex Greysukh 15 Oct '10

15 Oct '10

I am in the process of porting from log4j to LogBack in Windows environment (logback-0.9.24, slf4j-1.6.1). Unfortunately, RollingFile appender does not roll but copies files (similar to what have been described in https://bugs.eclipse.org/bugs/show_bug.cgi?id=323609) Are there any near future plans to address the issue? Is there a temporary work around?(I configure logging programmatically). Any information or a hint is greatly appreciated. Alex Greysukh Principal Software Engineer Certica Solutions, Inc. agreysukh(a)certicasolutions.com<mailto:agreysukh@certicasolutions.com>

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Release of logback v0.9.24
by Ceki Gülcü 14 Oct '10

14 Oct '10

Hello all, I am happy to announce the release of logback version 0.9.25. Please refer to the news page for precise details. http://logback.qos.ch/news.html You can download logback, including full source code, class files and documentation on our download page, shown below. http://logback.qos.ch/download.html You can receive logback related announcements by subscribing to the QOS.ch announce mailing list. To subscribe to QOS.ch announce list, please visit the following URL. http://www.qos.ch/mailman/listinfo/announce Enjoy, -- Ceki

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Logback NPE in Felix OSGi container.
by Mark Protas 13 Oct '10

13 Oct '10

I'm hitting an NPE in logger initialization in the Felix OSGi container if I specify the logback.configurationFile system property. Without the system property, I don't hit this and everything logs to the ConsoleAppender as expected. Any suggestions as to how to fix this? java.lang.NullPointerException at ch.qos.logback.core.util.Loader.getResourceOccurenceCount(Loader.java:58) at ch.qos.logback.classic.util.ContextInitializer.multiplicityWarning(ContextInitializer.java:160) at ch.qos.logback.classic.util.ContextInitializer.statusOnResourceSearch(ContextInitializer.java:183) at ch.qos.logback.classic.util.ContextInitializer.findConfigFileURLFromSystemProperties(ContextInitializer.java:111) at ch.qos.logback.classic.util.ContextInitializer.findURLOfDefaultConfigurationFile(ContextInitializer.java:120) at ch.qos.logback.classic.util.ContextInitializer.autoConfig(ContextInitializer.java:148) at org.slf4j.impl.StaticLoggerBinder.init(StaticLoggerBinder.java:85) at org.slf4j.impl.StaticLoggerBinder.<clinit>(StaticLoggerBinder.java:55) at org.slf4j.LoggerFactory.bind(LoggerFactory.java:121) at org.slf4j.LoggerFactory.performInitialization(LoggerFactory.java:111) at org.slf4j.LoggerFactory.getILoggerFactory(LoggerFactory.java:268) at org.slf4j.LoggerFactory.getLogger(LoggerFactory.java:241) at com.weiglewilczek.slf4s.Logger$.apply(logger.scala:32) at com.weiglewilczek.scalamodules.package$.<init>(package.scala:84) at com.weiglewilczek.scalamodules.package$.<clinit>(package.scala) at com.smiley.validation.create.Activator.start(Activator.scala:22) at org.apache.felix.framework.util.SecureAction.startActivator(SecureAction.java:633) at org.apache.felix.framework.Felix.activateBundle(Felix.java:1822) at org.apache.felix.framework.Felix.startBundle(Felix.java:1739) at org.apache.felix.framework.Felix.setActiveStartLevel(Felix.java:1143) at org.apache.felix.framework.StartLevelImpl.run(StartLevelImpl.java:264) at java.lang.Thread.run(Thread.java:637) CONFIDENTIALITY NOTICE: This e-mail message is covered by the Electronic Communications Privacy Act, 18 U.S.C. §2510-2521 and, together with any attachments, is intended only for the addressee. If you are not the intended recipient of this message, you may not disclose, print, copy, or disseminate this information. If you have received this in error, please reply and notify the sender (only) and delete the message along with any attachments. Unauthorized interception of this email is a violation of federal criminal law. If your company has signed a confidentiality agreement with Smiley Media, the content of this email is designated 'Confidential Information' within the meaning of that agreement.

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How to create log files per log level
by lunch716＠yahoo.co.jp 12 Oct '10

12 Oct '10

Hi, I'm using logback core and classic(both version are 0.9.9) with jdk5.0. My goal is to generate a log file per log level.Namely error.log is for error level and warn.log is for warn level and so on. I found the following thread though, http://marc.info/?l=logback-user&m=125052059800553&w=2 I could not create the LevelBasedDiscriminator class because I could not find the classes below on logback 0.9.9. ch.qos.logback.classic.sift.SiftingAppender ch.qos.logback.core.sift.Discriminator ch.qos.logback.classic.spi.ILoggingEvent I have two questions. Q1.Is it possible to create log files per log level? Q2.If I have to give up the use of SiftingAppender,how can I accomplish my goal? -------------------------------------- Learn more about breast cancer - Pink Ribbon Campaign 2010 http://yj.pn/JAy9L7

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