[jira] [Created] (LOG4J2-2056) Modularize Log4j as automatic modules

["Ralph Goers (JIRA)" <ji...@apache.org>]

Ralph Goers created LOG4J2-2056:
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             Summary: Modularize Log4j as automatic modules
                 Key: LOG4J2-2056
                 URL: https://issues.apache.org/jira/browse/LOG4J2-2056
             Project: Log4j 2
          Issue Type: New Feature
    Affects Versions: 2.9.1
            Reporter: Ralph Goers


To fully support Java 9 all Log4j jars must (at least) be packaged as automatic modules. We should, as much as possible, follow the recommendations at http://blog.joda.org/2017/05/java-se-9-jpms-automatic-modules.html. Given that the module names would be:

||Jar name||Module name||
|log4j-api|org.apache.logging.log4j|
|log4j-core|org.apache.logging.log4j.impl|
|log4j-1.2-api|org.apache.log4j|
|log4j-appserver|org.apache.logging.log4j.appserver|
|log4j-flume-ng|org.apache.logging.log4j.flume|
|log4j-iostreams|org.apache.logging.log4j.iostreams|
|log4j-jcl|org.apache.logging.log4j.jcl|
|log4j-jmx-gui|org.apache.logging.log4j.jmx.gui|
|log4j-jul|org.apache.logging.log4j.jul|
|log4j-liquibase|org.apache.logging.log4j.liquibase|
|log4j-nosql|org.apache.logging.log4j.nosql|
|log4j-sl4j-impl|org.apache.logging.log4j.slf4j.impl*|
|log4j-to-slf4j|org.apache.logging.log4j.toslf4j|
|log4j-taglib|org.apache.logging.log4j.taglib|
|log4j-web|org.apache.logging.log4j.web|

# Notably missing is log4j-osgi. Until OSGi documents how it will support Java 9 I see no point in modularizing the OSGi jar.
# log4j-slf4j-impl cannot currently be modularized until the binding is modified. It cannot have classes in the org.slf4j namespace.
# log4j-slf4j-impl and log4j-to-slf4j both use the same package name - org.apache.logging.log4j.slf4j. This will remain the same as it will prevent them both from being loaded at the same time.






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