Re: [logback-user] Logback-beagle with config file used for multiple environments

27 Jul 2012

      On 25.07.2012 00:31, Noremac wrote:
...
I found the newly released Logback-Beagle to look pretty cool. I want it!
However, I see that you need to add the tag <consolePlugin /> to the config
file. This makes me worry a little about the implications on this when that
same config file is used in test and production.
So it looks like if I add the consolePlugin then I'll be having an added
appender trying to spit out logs to the local machine (not desired).
Basically, I only want the extra appender in development. Is there any other
way to do this other than doing it programmatically (by doing a check on
which environment it is in).
You have several options:

1) use logback-text.xml for eh... testing.

2a) conditional logging. See also the documentation at [1].

Assuming "hulk" is the name of the production machine, you could enable 
sending events to the console plugin on machines other than hulk as follows:

<configuration>

   <if condition='!property("HOSTNAME").contains("hulk")'/>
     <consolePlugin/>
   </if>

   ..... other configuration directives
</configuration>

Note that conditional configuration requires Janino.

2b) use some preset system variable, say "deploymentType":

<configuration>

   <if condition='property("deploymentType").equals("development")'>
     <consolePlugin/>
   </if>

   ..... other configuration directives
</configuration>

2c) compute the deployment type dynamically. See the docs at [2].

<configuration>

   <define name="deploymentType"
           class="a.class.implementing.PropertyDefiner">
   </define>

   <if condition='property("deploymentType").equals("development")'>
     <consolePlugin/>
   </if>

   ..... other configuration directives
</configuration>

3) Programmatically enable sending events to the console plugin. Here is 
the code:

import org.slf4j.LoggerFactory;

import ch.qos.logback.classic.LoggerContext;
import ch.qos.logback.classic.net.SocketAppender;
import ch.qos.logback.classic.Logger;
import static org.slf4j.Logger.ROOT_LOGGER_NAME;

  ....

  String hostname = "localhost";
  int port = 4321;
  SocketAppender socketAppender = new SocketAppender();
  socketAppender.setRemoteHost(hostname);
  socketAppender.setPort(port);
  socketAppender.setIncludeCallerData(true);
  socketAppender.setReconnectionDelay(10000);

  LoggerContext lc = (LoggerContext) LoggerFactory.getILoggerFactory();
  socketAppender.setContext(lc);

  socketAppender.start();
  // LoggerFactory return type is org.slf4j.Logger
  Logger rootLogger = (Logger) LoggerFactory.getLogger(ROOT_LOGGER_NAME);
  rootLogger.addAppender(socketAppender);

HTH,

[1] http://logback.qos.ch/manual/configuration.html#conditional
[2] http://logback.qos.ch/manual/configuration.html#definingPropsOnTheFly

-- 
Ceki
http://tinyurl.com/proLogback

Re: [logback-user] Logback-beagle with config file used for multiple environments

ceki