Re: [logback-user] MDC and env-entry

24 Feb 2011


      You could easyly write your own discriminator class combining 
JNDIBasedContextDiscriminator and MDCBasedDiscriminator. Here is an example:

public class CombinedDiscriminator extends ContextAwareBase implements
     Discriminator<ILoggingEvent> {

  private String defaultMDCVal = "default";

   public String getDiscriminatingValue(ILoggingEvent event) {
     String mdcValue = defaultMDCVal;
     Map<String, String> mdcMap = event.getMdc();
     if (mdcMap != null) {
       mdcValue = mdcMap.get(key);
     }
     String contextName =  event.getLoggerContextVO().getName();
     return contextName + mdcValue;
   }
   ..etc
}


HTH,
--
Ceki
On 23.02.2011 13:39, José Juan Montiel wrote:
...
Hi,
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>
<!-- 5 l?neas de stacktrace para las excepciones -->
    <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.
I'll make more simple... how to mix
<discriminator
class="ch.qos.logback.classic.sift.JNDIBasedContextDiscriminator">
<defaultValue>unknown</defaultValue>
</discriminator>
and
<discriminator>
<Key>code</Key>
<DefaultValue>0000</DefaultValue>
</discriminator>
this is a MDC, form use %code (inside log line) like ${contextName} in
name file.
Can i have 2 discriminator inside 1 appender?
PD: logback version 0.9.21.
Thanks.
--
Jose Juan Montiel Martinez
Eurobits Technologies
Calle Musgo 3, 1ª Planta
28023 Madrid
T +34-917080300
F +34-913077480
josejuan.montiel@eurobits.es <mailto:josejuan.montiel@eurobits.es>
http://www.eurobits.com
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Re: [logback-user] MDC and env-entry

Ceki Gulcu