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https://issues.apache.org/jira/browse/LOG4J2-952?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14709192#comment-14709192
 ] 

Ralph Goers commented on LOG4J2-952:
------------------------------------

The log4j1 file contains class names for appenders, etc. and the components 
have different parameters, so they could never really be compatible except in 
the simplest use case.

To be honest, I never really understood the v1 format. The format I used is 
very similar to what Flume does.

> FAQ: How do I configure log4j2 programmatically in code without a 
> configuration file?
> -------------------------------------------------------------------------------------
>
>                 Key: LOG4J2-952
>                 URL: https://issues.apache.org/jira/browse/LOG4J2-952
>             Project: Log4j 2
>          Issue Type: Bug
>          Components: API, Configurators, Documentation
>    Affects Versions: 2.1
>            Reporter: Joe Merten
>         Attachments: LOG4J2-952.patch
>
>
> I found [this 
> link|http://logging.apache.org/log4j/2.x/faq.html#config_from_code] which 
> said:
> {quote}
> You could use the static method #initialize(String contextName, ClassLoader 
> loader, String configLocation) in 
> org.apache.logging.log4j.core.config.Configurator. (You can pass null for the 
> class loader.) Be aware that this class is not part of the public API so your 
> code may break with any minor release.
> {quote}
> This documentation is unclear because it points to a member function which 
> needs a filename {{configLocation}} where as the topic is »without a 
> configuration file«.
> It shoud rather point to the member function 
> {{org.apache.logging.log4j.core.config.Configurator.initialize(ClassLoader 
> loader, ConfigurationSource source)}}.
> Example:
> {code:java}
> import org.apache.logging.log4j.core.config.ConfigurationSource;
> import org.apache.logging.log4j.core.config.Configurator;
> final String hardCodedXmlConfig =
>         "<?xml version='1.0' encoding='UTF-8'?>\n" +
>         "<Configuration status='INFO'>\n" +
>         "  <Appenders>\n" +
>         "    <Console name='Console' target='SYSTEM_OUT'>\n" +
>         "      <PatternLayout pattern='%d{HH:mm:ss.SSS} [%t] %-5level 
> %logger{36} - %msg%n'/>\n" +
>         "    </Console>\n" +
>         "  </Appenders>\n" +
>         "  <Loggers>\n" +
>         "    <Root level='debug'>\n" +
>         "      <AppenderRef ref='Console'/>\n" +
>         "    </Root>\n" +
>         "  </Loggers>\n" +
>         "</Configuration>\n";
> try {
>     Configurator.initialize(null, new ConfigurationSource(new 
> ByteArrayInputStream(hardCodedXmlConfig.getBytes())));
> } catch (IOException e) {
>     e.printStackTrace();
> }
> {code}



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