November 2010 - logback-user

How to reference file one level above the web context
by Dawson Mossman 09 Nov '10

09 Nov '10

I am trying to use the <property file="logback.properties" /> tag in my logback.xml file to reference an external settings file. I want to use a relative path and specify the file one level above my application context. For example: <web server root>/apps/myapplication/web-inf/classes/logback.xml I want to put the logback.properties file at <web server root>/apps/. Do you know what relative path I need to use to do this? I've tried everything I can think of, including the following, but they did not work: <property file="../logback.properties" /> <property file="../../../logback.properties" /> <property file="/logback.properties" /> <property file="./logback.properties" /> Please help ... there has to be a way without using an absolute path! Dawson

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JaninoEventEvaluator Expression
by Roberts, David 08 Nov '10

08 Nov '10

Is it possible to have an expression with multiple criteria? For example: <filter class="ch.qos.logback.core.filter.EvaluatorFilter"> <evaluator class="ch.qos.logback.classic.boolex.JaninoEventEvaluator"> <expression>(logger.equals("mylogger") && message.contains("my message"))</expression> </evaluator> <OnMismatch>NEUTRAL</OnMismatch> <OnMatch>DENY</OnMatch> </filter> I have tried encoding the && and using CDATA but logback still doesn't accept it or perform correctly. Dave

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Query re. LOGBack, Spring & SLF4J
by Seamus Hannan 08 Nov '10

08 Nov '10

Hi, I have a question concerning getting LOGBack working with Spring using Maven. According to the Spring Documentation Spring needs to be forced to work iwth SLF4J. (sample code below) My question is how do I get LOGBack to work with this configuration (instead of log4j)? The Spring documentation indicates that you need to use jcl-over-slf4j, but it is not clear how to configure LOGBack to work with Spring and SLF4J. My code, including the example code below builds for me intermiitently from the command line, indicating that there is some classloading issue. Any advice will be much appreciated. Thanks. Seamus Hannan <dependencies> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-context</artifactId> <version>3.0.0.RELEASE</version> <scope>runtime</scope> <exclusions> <exclusion> <groupId>commons-logging</groupId> <artifactId>commons-logging</artifactId> </exclusion> </exclusions> </dependency> </dependencies> <dependencies> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-context</artifactId> <version>3.0.0.RELEASE</version> <scope>runtime</scope> <exclusions> <exclusion> <groupId>commons-logging</groupId> <artifactId>commons-logging</artifactId> </exclusion> </exclusions> </dependency>  <dependency> <groupId>ch.qos.logback</groupId> <artifactId>logback-classic</artifactId> <version>0.9.26</version> </dependency> <dependency> <groupId>org.slf4j</groupId> <artifactId>jcl-over-slf4j</artifactId> <version>1.5.8</version> <scope>runtime</scope> </dependency> <dependency> <groupId>org.slf4j</groupId> <artifactId>slf4j-api</artifactId> <version>1.5.8</version> <scope>runtime</scope> </dependency> <dependency> <groupId>org.slf4j</groupId> <artifactId>slf4j-log4j12</artifactId> <version>1.5.8</version> <scope>runtime</scope> </dependency> <dependency> <groupId>log4j</groupId> <artifactId>log4j</artifactId> <version>1.2.14</version> <scope>runtime</scope> </dependency> </dependencies>

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Backlog, SLF4J and jars using other logging frameworks
by Ali Salehi 07 Nov '10

07 Nov '10

Hi all, I have a dependency to a jar file which is using java.util.logging. My code uses Logback/slf4j framework. As I understood, slf4j will proxy other logging frameworks. I created the error using the following code: logger = org.slf4j.LoggerFactory.getLogger("test1"); jdkLogger = java.util.logging.Logger.getLogger("test2"); logger.debug("Backlog logs ...") jdkLogger.info("JDK Logs ...") and my backlog.xml <?xml version="1.0" encoding="UTF-8"?> <configuration scan="false" debug="false" > <appender name="stdout" class="ch.qos.logback.core.ConsoleAppender"> <encoder> <pattern>[%4p] [%d{ISO8601}] [%t] %c{1}: %m%n</pattern> </encoder> </appender> <root level="WARN"> <appender-ref ref="stdout"/> </root> </configuration> When I execute the code, I see a log output from test2 while test1 gets filtered by backlog. I was expecting that both messages to get filtered by SLF4J/Backlog. I have slf4j-api-1.6.1.jar, logback-classic-0.9.24.jar and logback-core-0.9.24.jar files in my classpath. I appreciate your comments, -A

5 6

Groovy configuration of SizeAndTimeBasedFNATP
by Jeff Skjonsby 05 Nov '10

05 Nov '10

I have been trying to convert our logging configuration to the groovy based configuration and have run into an issue with setting the SizeAndTimeBasedFNATP up. I used the converter tool to convert our configuration and have also tried the examples in the documentation: import ch.qos.logback.classic.encoder.PatternLayoutEncoder import ch.qos.logback.core.rolling.RollingFileAppender import ch.qos.logback.core.rolling.SizeAndTimeBasedFNATP import ch.qos.logback.core.rolling.TimeBasedRollingPolicy import static ch.qos.logback.classic.Level.DEBUG appender("ROLLING", RollingFileAppender) { file = "mylog.txt" rollingPolicy(TimeBasedRollingPolicy) { fileNamePattern = "mylog-%d{yyyy-MM-dd}.%i.txt" timeBasedFileNamingAndTriggeringPolicy(SizeAndTimeBasedFNATP) { maxFileSize = "100MB" } } encoder(PatternLayoutEncoder) { pattern = "%msg%n" } } root(DEBUG, ["ROLLING"]) Everything I've tried has resulted in this exception: java.lang.NullPointerException at ch.qos.logback.core.rolling.TimeBasedFileNamingAndTriggeringPolicyBase.start(TimeBasedFileNamingAndTriggeringPolicyBase.java:46) at ch.qos.logback.core.rolling.SizeAndTimeBasedFNATP.start(SizeAndTimeBasedFNATP.java:36) ... If I step through the configuration process it appears that on line 46 in TimeBasedFileNamingAndTriggeringPolicyBase the tbrp member variable is null here. Any ideas?

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Can you put the logback.xml file at the ear level?
by JW 04 Nov '10

04 Nov '10

Hello, I currently have my logback jar files packaged at the ear level and referenced by my manifest file. I am looking to put the logback.xml file at this level as well, but I am unable to get it to work. Reading through the archives, I thought I remember reading that this won't work and that you have to put the logback.xml file within a jar file for it to work. Is this true? Is there a way to package the logback.xml file at the ear level without putting it in its own jar file? Thanks for your help. Joshua

2 3

Websphere specific JMX configuration?
by Joshua White 01 Nov '10

01 Nov '10

All, I have enabled JMX in my logback.xml file. I see an entry in the log ("ch.qos.logback.classic.joran.action.JMXConfiguratorAction - begin") indicating that it has been picked up. When I open JConsole though, I don't see the "ch.qos.logback.classic.jmx.Configurator" folder mentioned in the documentation. Is there something I am missing? Here is what I am using: Logback 0.9.24 Websphere 6.1

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