Re: [logback-user] Programmmatically creatinglogger/appender/pattern

26 Mar 2009


      You need to invoke the start() method on most if not all logback components for 
them to function property.

Lance White wrote:
...
OK, I still can't get this working, and having looked at the junit src, they're all individual tests and I couldn't find any integrated tests in there.
This is the simple test I'm trying to use. If I use the LoggerContext from the ILoggerFactory, then I get a log message to the console (using the standard stuff I presume) and no file is created. If I create the LoggerContext then no output is produced anywhere.
Java is 1.5.0_16.
Cheers
Lance
(p.s. I've got this working with log4j, but I'm trying to upgrade)
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import org.slf4j.LoggerFactory;
import ch.qos.logback.classic.Logger;
import ch.qos.logback.classic.LoggerContext;
import ch.qos.logback.classic.PatternLayout;
import ch.qos.logback.classic.spi.LoggingEvent;
import ch.qos.logback.core.rolling.FixedWindowRollingPolicy;
import ch.qos.logback.core.rolling.RollingFileAppender;
import ch.qos.logback.core.rolling.SizeBasedTriggeringPolicy;
public class Test2
{
  public Test2() { }
public void run(String name) {
      LoggerContext lc = (LoggerContext) LoggerFactory.getILoggerFactory();
//		LoggerContext lc = new LoggerContext();
      Logger logger = lc.getLogger(name);
PatternLayout layout = new PatternLayout();
      layout.setPattern("%d:%msg%n");
RollingFileAppender<LoggingEvent> rfa = new RollingFileAppender<LoggingEvent>();
      rfa.setContext(lc);
      rfa.setName(name + "_Appender");
      rfa.setLayout(layout);
      rfa.setFile("c:\\" + name + ".log");
SizeBasedTriggeringPolicy<LoggingEvent> triggeringPolicy = new SizeBasedTriggeringPolicy<LoggingEvent>();
      triggeringPolicy.setContext(lc);
      triggeringPolicy.setMaxFileSize(String.valueOf(50000));
      triggeringPolicy.start();
      rfa.setTriggeringPolicy(triggeringPolicy);
FixedWindowRollingPolicy rollingPolicy = new FixedWindowRollingPolicy();
      rollingPolicy.setContext(lc);
      rollingPolicy.setFileNamePattern("c:\\" + name + "-%i.log");
      rollingPolicy.setMinIndex(1);
      rollingPolicy.setMaxIndex(10);
      rollingPolicy.setParent(rfa);
      rollingPolicy.start();
      rfa.setRollingPolicy(rollingPolicy);
logger.info("hello");
  }
public static void main(String[] args)
  {
      Test2 t = new Test2();
      t.run("fred");
  }
}
---------------------------------------------------------------------------------
-----Original Message-----
From: logback-user-bounces@qos.ch [mailto:logback-user-bounces@qos.ch] On Behalf Of Lance White
Sent: 25 March 2009 16:09
To: logback users list
Subject: Re: [logback-user] Programmmatically creatinglogger/appender/pattern
Cheers Ceki, I'll go through those.
Lance
-----Original Message-----
From: logback-user-bounces@qos.ch [mailto:logback-user-bounces@qos.ch] On Behalf Of Ceki Gulcu
Sent: 25 March 2009 16:02
To: logback users list
Subject: Re: [logback-user] Programmmatically creatinglogger/appender/pattern
Hello Lance,
Look into the junit test cases which do that type of operation all the time. For 
example, see:
http://logback.qos.ch/xref-test/ch/qos/logback/classic/html/HTMLLayoutTest.h...
http://logback.qos.ch/xref-test/ch/qos/logback/core/rolling/SizeBasedRolling...
If that does not help, post your code here.
Lance White wrote:
...
Has anyone got any examples on how to programmatically create a logger /
appender / pattern et. al in-line in code?
I can't for the life of me get this running. Currently I've got the
appender  (file appender in this case) creating the output files, but
all I get in them is stuff like:
%PARSER_ERROR_d:MODULE:%PARSER_ERROR_msg%
Which looks like the pattern stuff isn't started up properly.
Cheers
Lance
-- 
Ceki Gülcü
Logback: The reliable, generic, fast and flexible logging framework for Java.
http://logback.qos.ch