Custom log4j.properties for Share in web_extension should accept properties

Please have a look at https://issues.alfresco.com/jira/browse/MNT-14044 for reference. Adding a separate datetime format for a custom log4j.properties than what is used for the standard logging (log4j.properties in tomcat/webapps/alfresco/WEB-INF/classes) works if you set the root logger:

log4j.rootLogger=error, Console, File

However, this doesn't work for any customized log4j.properties for the Share application.

Steps to replicate:

1. Create a file called custom-log4j.properties
2. Place the following at the top of the file:

log4j.rootLogger=error, Console, File

1. All outputs currently set to be a ConsoleAppender.
   log4j.appender.Console=org.apache.log4j.ConsoleAppender
   log4j.appender.Console.layout=org.apache.log4j.PatternLayout

1. use log4j NDC to replace %x with tenant domain / username
   log4j.appender.Console.layout.ConversionPattern=%d {ISO8601} %x %-5p [%c{3}] [%t] %m%n
   log4j.appender.Console.layout=org.apache.log4j.PatternLayout
   log4j.appender.Console.layout.ConversionPattern=%d{ABSOLUTE} %-5p [%c] [%t] %m%n
   
   #log4j.appender.Console.layout.ConversionPattern=%d{ABSOLUTE} %-5p [%c] %m%n
   
   ###### File appender definition #######
   log4j.appender.File=org.apache.log4j.DailyRollingFileAppender
   log4j.appender.File.File=alfresco.log
   log4j.appender.File.Append=true
   log4j.appender.File.DatePattern='.'yyyy-MM-dd
   log4j.appender.File.layout=org.apache.log4j.PatternLayout
   log4j.appender.File.layout.ConversionPattern=%d{ISO8601}

   %-5p [%c] %m%n

log4j.logger.org.alfresco.util.exec.RuntimeExec=DEBUG

3. Restart Alfresco

4. If you look in the alfresco.log file during startup you will see the date/time format as such:

2015-06-02 10:27:06,204 INFO ...

5. Stop Alfresco

6. Create a custom-log4j.properties file under web_extension directory.

7. Add the same lines as in Step #2 above.

Observed:

If you look in the share.log file after startup, the date/time format still has the standard:

10:28:08,611 INFO ...

Expected:

Like you can with a custom log4j format with Alfresco, you should be able to do the same for Share.