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From Mikael Ståldal (JIRA) <j...@apache.org>
Subject [jira] [Commented] (LOG4J2-952) FAQ: How do I configure log4j2 programmatically in code without a configuration file?
Date Thu, 13 Aug 2015 13:55:46 GMT

    [ https://issues.apache.org/jira/browse/LOG4J2-952?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14695243#comment-14695243
] 

Mikael Ståldal commented on LOG4J2-952:
---------------------------------------

My code was only meant to be an example, details can be different.

If make a typo in my code, I want the compiler to signal an error, I don't want to have to
wait until it fails at runtime.

That's the whole point of having a statically typed language like Java, otherwise we could
as well use Python, Ruby, Javascript or some other dynamic language.


> 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
>
> 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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