February 2011 - logback-user

Log4j to Logback migration, logback.xml question
by Fabio Erculiani 09 Feb '11

09 Feb '11

Hi there, I'm migrating my stuff from log4j to logback and I've gotten to the log4j.xml -> logback.xml porting. Besides not having a .dtd makes the work quite hard, I am trying to understand one thing: In log4j I had <category> supporting the class= attribute (while <logger>, which would be its replacement from my understanding, doesn't). Is there anything similar in logback.xml? I wrote a custom Logger (implementing Logger interface) and I would like to tell the logger to use it instead of org.slf4j.Logger. Thanks a lot. -- Fabio Erculiani

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Using conditional processing
by Michael C Rosenstein 04 Feb '11

04 Feb '11

Hello, I've been experimenting with logback core/classic 0.9.27 (and slf4j 1.6.1) with Tomcat 6.0.29, Java 1.6 on Solaris for the past couple days, and have hit a wall viz conditional configuration processing. When I include a conditional like the following in my configuration file, nothing in the file is processed beginning with and after that directive: <if condition='property("HOSTNAME").contains("hactar")'> <then> <property name="foo" value="bar"/> </then> </if> Even a conditional as simple as the following causes processing to abort: <if condition='"foo".equals("foo")'> <then> <property name="foo" value="bar"/> </then> </if> No errors seen in the ViewStatusMessagesServlet. Am I doing something wrong? Thanks. /mcr

4 10

SyslogAppender not logging Throwable message
by Gustav Karlsson 04 Feb '11

04 Feb '11

Hi, We are using the SyslogAppender in logback 0.9.27 and are having an issue with the logging of Throwables. When we are logging an entry like LOG.debug("My message", throwable), "My message" and the throwable's stacktrace is appended to the log, but not the throwable's message. Has anyone else experienced this and know the cause? Regards, Gustav

1 0

MDC and env-entry
by José Juan Montiel 04 Feb '11

04 Feb '11

Hi, again with another question. With aspectj, in injecting a var in MCD, something like this... MDC.put("code",var); in some places, depending something, and i'm using this to generate a diferent file for this something like <appender name="APPENDER" class="ch.qos.logback.classic.sift.SiftingAppender"> <filter class="ch.qos.logback.core.filter.EvaluatorFilter"> <evaluator class="ch.qos.logback.classic.boolex.JaninoEventEvaluator"> <expression> (marker != null) && ( (marker.contains("ASPECTJ")) || (marker.contains("SOAP"))) </expression> </evaluator> <onMatch>DENY</onMatch> </filter> <discriminator> <Key>code</Key> <DefaultValue>0000</DefaultValue> </discriminator> <sift> <appender name="FILE-${code}" class="ch.qos.logback.core.rolling.RollingFileAppender"> <prudent>${prudent}</prudent>  <encoder class="ch.qos.logback.classic.encoder.PatternLayoutEncoder"> <Pattern>%date - [%thread] - %.-20M - %L - cn=%contextName - [%thread] - [%X{code}] - %message%n %exception{5}</Pattern> </encoder> <rollingPolicy class="ch.qos.logback.core.rolling.TimeBasedRollingPolicy"> <FileNamePattern>${USER_HOME}/${backupDir}${code}.%d${patronRolling}</FileNamePattern> <MaxHistory>${maxHistory}</MaxHistory> </rollingPolicy> </appender> </sift> </appender> ASPECTJ and SOAP are Markers of other traces, that i don't want to see here. This way i get in my root log directory ${USER_HOME}/${backupDir} files like 0001.log 0002.log But, now i have multile apps (wars and ejbs) where i use web.xml <?xml version="1.0" encoding="UTF-8"?> <web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns=" http://java.sun.com/xml/ns/javaee" xmlns:web=" http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" xsi:schemaLocation=" http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" id="WebApp_ID" version="2.5"> ... <env-entry> <description>JNDI logging context for this app</description> <env-entry-name>logback/context-name</env-entry-name> <env-entry-type>java.lang.String</env-entry-type> <env-entry-value>APP1</env-entry-value> </env-entry> <env-entry> <description>URL for configuring logback context</description> <env-entry-name>logback/configuration-resource</env-entry-name> <env-entry-type>java.lang.String</env-entry-type> <env-entry-value>logback.xml</env-entry-value> </env-entry> ... </web-app> ejb-jar.xml <?xml version="1.0" encoding="UTF-8"?> <!DOCTYPE ejb-jar PUBLIC "-//Sun Microsystems, Inc.//DTD Enterprise JavaBeans 2.0//EN" "http://java.sun.com/dtd/ejb-jar_2_0.dtd"> <ejb-jar> <enterprise-beans> <session> ... <env-entry> <description>JNDI logging context for this app</description> <env-entry-name>logback/context-name</env-entry-name> <env-entry-type>java.lang.String</env-entry-type> <env-entry-value>EJB1</env-entry-value> </env-entry> <env-entry> <description>URL for configuring logback context</description> <env-entry-name>logback/configuration-resource</env-entry-name> <env-entry-type>java.lang.String</env-entry-type> <env-entry-value>logback.xml</env-entry-value> </env-entry> ... </session> </enterprise-beans> ... </ejb-jar> a env-entry to identificate. I know that insede file, i use cn=%contextName to see this context but... How could i use this context like i use ${code} to separete this files (0001.log, 0002.log) in diferents directories. Thanks. -- Jose Juan Montiel Martinez Eurobits Technologies Calle Musgo 3, 1ª Planta 28023 Madrid T +34-917080300 F +34-913077480 josejuan.montiel(a)eurobits.es http://www.eurobits.com

1 0

Aspect & NDC
by José Juan Montiel 04 Feb '11

04 Feb '11

Hi, i'm implementing a loggin via AspectJ in a Maven project. My aspect class is something like this... public aspect TraceMethodCalls { static Marker ASPECTJ_TRACE_ENTER = MarkerFactory.getMarker("ASPECTJ_TRACE_ENTER"); final Logger logger = LoggerFactory.getLogger(TraceMethodCalls.class); TraceMethodCalls() { } pointcut traceMethods() //give me all method calls of every class with every visibility : (execution(* *.*(..)) //give me also constructor calls || execution(*.new(..))) && !execution(* toString(..)) && !execution(* hashCode(..)) //stop recursion don't get method calls in this aspect class itself && !within(TraceMethodCalls); //advice before: do something before method is really executed before() : traceMethods() { if (logger.isDebugEnabled()) { //get info about captured method and log it Signature sig = thisJoinPointStaticPart.getSignature(); logger.trace(ASPECTJ_TRACE_ENTER, "---> [" + sig.toShortString() + "]"); } } //advice before: do something before method is really executed after() returning (Object o): traceMethods() { if (logger.isDebugEnabled()) { //get info about captured method and log it Signature sig = thisJoinPointStaticPart.getSignature(); logger.trace(ASPECTJ_TRACE_ENTER, "<--- [" + sig.toShortString() + "]"); } } and logback appender <appender name="ASPECTJ_TRACE_ENTER" class="ch.qos.logback.core.rolling.RollingFileAppender"> <filter class="ch.qos.logback.core.filter.EvaluatorFilter"> <evaluator class="ch.qos.logback.classic.boolex.JaninoEventEvaluator"> <expression> (marker != null) && (marker.contains("ASPECTJ_TRACE_ENTER")) </expression> </evaluator> <onMatch>ACCEPT</onMatch> <onMismatch>DENY</onMismatch> </filter> <prudent>${prudent}</prudent>  <encoder class="ch.qos.logback.classic.encoder.PatternLayoutEncoder"> <Pattern>%date %-5level - cn=%contextName - [%thread] - %message%n</Pattern> </encoder> <rollingPolicy class="ch.qos.logback.core.rolling.TimeBasedRollingPolicy"> <FileNamePattern>${USER_HOME}/${backupDir}aspectj.enter_exit.%d${patronRolling}</FileNamePattern> <MaxHistory>${maxHistory}</MaxHistory> </rollingPolicy> </appender> I see that that support to NDC is disabled in logback, how could i implement a TAB of this messages without NCD? --->Method1 ------>Method2 --------->Method3 <---------Method3 <------Method2 <---Method1 Thanks. -- Jose Juan Montiel Martinez Eurobits Technologies Calle Musgo 3, 1ª Planta 28023 Madrid T +34-917080300 F +34-913077480 josejuan.montiel(a)eurobits.es http://www.eurobits.com

1 0

Logback with WebLogic Server - Suggestions
by jaybytez 03 Feb '11

03 Feb '11

I am totally new to SLF4J/Logback, and I am using WebLogic Server 11. We previously were using log4j and used an external file and some custom class so that we could update the log4j file at runtime and not have to reboot the server or application. We didn't use the WebLogic Server console to change the logging level. So if I want to use slf4j/logback, is there anything special I have to do for placing jars in the bootclasspath or lib directory. As well as when I want to have runtime changes to the log level, what is the best way to do this with slf4j/logback and WebLogic Server? I read this blog for help: http://blog.kares.org/2009/10/log4j-logging-without-log4j.html Thanks for your help...jay -- View this message in context: http://old.nabble.com/Logback-with-WebLogic-Server---Suggestions-tp30829362… Sent from the Logback User mailing list archive at Nabble.com.

2 2

Multiple configuration files
by jaybytez 02 Feb '11

02 Feb '11

Is it possible to have multiple configuration files within a war, and both the files will be used to produce logging? I produced a jar file that has logback.xml for general purpose logging and then a produce a logback.xml specific to my war files and the web service endpoint running within the war. So when I deploy the war, I might have as few as two logback.xml. If multiple files are found, will their configurations be merged together? Thanks for your help...jay -- View this message in context: http://old.nabble.com/Multiple-configuration-files-tp30829268p30829268.html Sent from the Logback User mailing list archive at Nabble.com.

1 0

Configure logback, Tomcat and webapps logging
by Giorgio Maria Santini 02 Feb '11

02 Feb '11

Hello, I'm trying to have my webapps logging with logback framework. I'm coming from a shell application where I've successfully had my logs handled by logback with no problems. Now I'm quite confusing using it with Tomcat. I've read about logback-access http://logback.qos.ch/access.html and it seems ok, but I don't understand where to put my config file for logback. Well, each of my webapps should have their own logback.xml configuration file, but in the manual it says to put the file in the global ${tomcat_home}/config folder, like to deny deploying a webapp with its configuration file under WEB-INF/classes path. There's a way to do it? I'm using Tomcat 6.0.30 and logback 0.9.24 Thanks a lot Giorgio Maria Santini

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