Great, SiftingAppender seems to be what I need, once I can configure it correctly Could you assist with rolling policy for it? I have a rolling policy that rolls over on size. Whether I put it in the sifting appender (<appendername="SIFT"class="ch.qos.logback.classic.sift.SiftingAppender">) or one of the generated ones (<appendername="FILE-${userid}"class="ch.qos.logback.core.FileAppender">) it seems to have no effect in either case. The rolling policy works fine in a separate FileAppender. Is it possible to add a rolling policy for a sifting appender, am I missing something? Thank you. ________________________________ From: ceki <ceki@qos.ch> To: logback users list <logback-user@qos.ch> Sent: Tuesday, June 12, 2012 4:00:28 PM Subject: Re: [logback-user] Split logs to different files by MDC? I'd suggest to re-write the expression as     ((String))mdc.get("variable").matches("/test/") Are you familiar with SiftingAppender? It seems to address a use case similar to yours. HTH, [1] http://logback.qos.ch/manual/appenders.html#SiftingAppender -- Ceki http://twitter.com/#!/ceki On 12.06.2012 20:17, Yura Levandovskyy wrote:

Hello

I have an application that has an mdc variable. How can I make a proper filter, so that if variable = test, all such output goes to one file, and to another file if variable is anything else?

I tried the following (not sure how to go from there even if it worked though):

<expression> mdc?.get("variable") ~= /test/ </expression>

but the result is

ERROR in ch.qos.logback.classic.boolex.JaninoEventEvaluator@7d55b9f - Could not start evaluator with expression [mdc?.get("variable") ~= /test/ )]

Any suggestions?

Thanks

_______________________________________________ Logback-user mailing list Logback-user@qos.ch http://mailman.qos.ch/mailman/listinfo/logback-user

This is the appender in question: <appender name="SIFT" class="ch.qos.logback.classic.sift.SiftingAppender">         <discriminator>             <key>variable</key>             <defaultValue>default</defaultValue>         </discriminator>         <sift>             <appender name="FILE-${variable}" class="ch.qos.logback.core.FileAppender">                 <file>${home}/logs/${variable}.log</file>                 <append>false</append>                 <layout class="ch.qos.logback.classic.PatternLayout">                     <pattern>[%X{variable}]</pattern>                 </layout>                 <rollingPolicy class="ch.qos.logback.core.rolling.TimeBasedRollingPolicy">                     <fileNamePattern>${home}/logs/${variable}.%d{yyyy-MM-dd}.%d{HHmm,aux}.%i.log</fileNamePattern>                     <timeBasedFileNamingAndTriggeringPolicy class="ch.qos.logback.core.rolling.SizeAndTimeBasedFNATPExt">                         <maxFileSize>50KB</maxFileSize>                     </timeBasedFileNamingAndTriggeringPolicy>                     <maxHistory>30</maxHistory>                 </rollingPolicy>             </appender>         </sift> </appender> ________________________________ From: ceki <ceki@qos.ch> To: logback users list <logback-user@qos.ch> Sent: Wednesday, June 13, 2012 5:49:31 PM Subject: Re: [logback-user] Split logs to different files by MDC? SiftingAppender can contain any other appenders except another SiftingAppender. Can you post your config file? On 13.06.2012 23:47, Yura Levandovskyy wrote:

Great, SiftingAppender seems to be what I need, once I can configure it correctly

Could you assist with rolling policy for it? I have a rolling policy that rolls over on size. Whether I put it in the sifting appender (*<appendername="SIFT"class="ch.qos.logback.classic.sift.SiftingAppender">) * or one of the generated ones* * *(**<appendername="FILE-${userid}"class="ch.qos.logback.core.FileAppender">)* it seems to have no effect in either case. The rolling policy works fine in a separate FileAppender. Is it possible to add a rolling policy for a sifting appender, am I missing something?

Thank you.

------------------------------------------------------------------------ *From:* ceki <ceki@qos.ch> *To:* logback users list <logback-user@qos.ch> *Sent:* Tuesday, June 12, 2012 4:00:28 PM *Subject:* Re: [logback-user] Split logs to different files by MDC?

I'd suggest to re-write the expression as

((String))mdc.get("variable").matches("/test/")

Are you familiar with SiftingAppender? It seems to address a use case similar to yours. HTH,

[1] http://logback.qos.ch/manual/appenders.html#SiftingAppender

-- Ceki http://twitter.com/#!/ceki <http://twitter.com/#%21/ceki>

On 12.06.2012 20:17, Yura Levandovskyy wrote:   > Hello   >   > I have an application that has an mdc variable. How can I make a proper   > filter, so that if variable = test, all such output goes to one file,   > and to another file if variable is anything else?   >   > I tried the following (not sure how to go from there even if it worked   > though):   >   > <expression>   > mdc?.get("variable") ~= /test/   > </expression>   >   > but the result is   >   > ERROR in ch.qos.logback.classic.boolex.JaninoEventEvaluator@7d55b9f -   > Could not start evaluator with expression [mdc?.get("variable") ~= /test/ )]   >   > Any suggestions?   >   > Thanks   >

-- Ceki http://twitter.com/#!/ceki _______________________________________________ Logback-user mailing list Logback-user@qos.ch http://mailman.qos.ch/mailman/listinfo/logback-user

By the way, since the home property is used within SiftingAppender, it should be defined in the "context" scope. Example: <property name="home" value="/tmp" scope="context"/> HTH, -- Ceki http://twitter.com/#!/ceki On 14.06.2012 18:57, ceki wrote:

Hi Yura,

There multiple errors in the config you provided (independent of SiftingAppender). As a general recommendation, you should set the debug attribute to true to see the errors.

<configuration debug="true"> ... </configuration?

Here are a few hints.

Hint1: ch.qos.logback.core.rolling.RollingFileAppender not FileAppender Hint2: SizeAndTimeBasedFNATPExt does not exist

HTH,

SiftingAppender replays elements found within <sift>...</sift> when it creates a new appender instance. You probably do not want SiftingAppender to do conditional configuration each time it creates a new appender. As such, I would remommend to move the conditional part outside the <sift></sift> element. Is that possible? -- Ceki http://twitter.com/#!/ceki On 15.06.2012 20:26, Yura Levandovskyy wrote:

Oh wow, I actually haven't noticed that I just have FileAppender, not RollingFileAppender The 'home' property is defined higher up, so that part works well now Thank you for the hint about debug, going to save a lot of frustration

Could you advise on how to use <if> with mdc values? What I'm trying is the following:

I have this in my SiftingAppender: <discriminator> <key>variable</key> <defaultValue>default</defaultValue> </discriminator>

I want to determine the file name depending on the property, such that (inside rollingPolicy):

<if condition='property("variable").equals("default")'> <then> <fileNamePattern>${home}/logs/generic-logs.%d{yyyy-MM}.%i.log</fileNamePattern>

</then> <else> <fileNamePattern>${home}/logs/${variable}.%d{yyyy-MM-dd}.%d{HHmm,aux}.%i.log</fileNamePattern> </else> </if>

At the moment the .equals check seems to fail all the time, and so the 1st fileNamePattern is never used. What am I doing wrong?

------------------------------------------------------------------------ *From:* ceki <ceki@qos.ch> *To:* logback users list <logback-user@qos.ch> *Sent:* Thursday, June 14, 2012 1:02:19 PM *Subject:* Re: [logback-user] Split logs to different files by MDC?

By the way, since the home property is used within SiftingAppender, it should be defined in the "context" scope. Example:

<property name="home" value="/tmp" scope="context"/>

HTH, -- Ceki http://twitter.com/#!/ceki <http://twitter.com/#%21/ceki>

On 14.06.2012 18:57, ceki wrote:

...

Hi Yura,

There multiple errors in the config you provided (independent of SiftingAppender). As a general recommendation, you should set the debug attribute to true to see the errors.

<configuration debug="true"> ... </configuration?

Here are a few hints.

Hint1: ch.qos.logback.core.rolling.RollingFileAppender not FileAppender Hint2: SizeAndTimeBasedFNATPExt does not exist

HTH,