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https://issues.apache.org/jira/browse/LOG4J2-2757?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Petar Petrov closed LOG4J2-2757.
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Resolution: Not A Problem
> JDBCAppender tableName from Main Arguments Lookup
> -------------------------------------------------
>
> Key: LOG4J2-2757
> URL: https://issues.apache.org/jira/browse/LOG4J2-2757
> Project: Log4j 2
> Issue Type: Question
> Components: Appenders, JDBC
> Affects Versions: 2.13.0
> Reporter: Petar Petrov
> Priority: Major
>
> Hi,
> I've posted this on StackOverflow, however, I could not really get any
> solution there.
> There is a JDBCAppender in my application to which I'd like to set the
> *tableName* parameter from a [main argument
> lookup|http://logging.apache.org/log4j/2.x/manual/lookups.html#AppMainArgsLookup].
> Reason for this is that my database table may optionally have a prefix, so
> I'm reading this from a configuration file in my application and I'd like to
> apply it to the appender at runtime.
> {code:java}
> <JDBC name="TaskLogJDBC" tableName="${main:1}LogEvents">
> <ConnectionFactory class="my.package.name.ConnectionFactory"
> method="getConnection"/>
> <Column name="created_on" isEventTimestamp="true"/>
> <Column name="lvl" pattern="%level"/>
> <Column name="logger" pattern="%logger"/>
> <Column name="message" pattern="%message"/>
> <Column name="throwable" pattern="%ex{full}"/>
> </JDBC>
> {code}
> This is what I use in *Main.java* to set the arguments:
> {code:java}
> MainMapLookup.setMainArguments(new String[] { "--prefix", tablesPrefix
> });{code}
> Unfortunately, this does not seem to work. The JDBCAppender keeps reading the
> *tableName* parameter verbatim as _${main:1}LogEvents_ instead of
> _prefix_LogEvents_. I traced it and I think the JDBCAppender configuration
> read happens before the *MainMapLookup.setMainArguments()* gets called.
> Environment variable lookup is an option, but I'd like to avoid it at this
> point. Are there any other options or am I doing something wrong?
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