Log4j logs in osgi

1. log4j. properties example
Log4j. rootcategory = info, stdout, logfile

Log4j. appender. stdout = org. Apache. log4j. leleappender
Log4j. appender. stdout. layout = org. Apache. log4j. patternlayout
Log4j. appender. stdout. layout. conversionpattern = % d % P [% C]-<% m> % N

Log4j. appender. logfile = org. Apache. log4j. dailyrollingfileappender
Log4j. appender. logfile. File = text_log.log
Log4j. appender. logfile. datepattern =. yyyy-mm-dd
Log4j. appender. logfile. layout = org. Apache. log4j. patternlayout
Log4j. appender. logfile. layout. conversionpattern = % d % P [% C]-<% m> % N

Needless to say, there are two points worth attention.
Log4j. rootcategory = info, followed by upper case. If it is written in lower case, the default value is info.
Log4j. appender. logfile. File = text_log.log. This is the file that generates the log result. The address of this file is relative to the jar package that starts main.
For example, in the development status, the root directory of eclipse and the directory where the project is packaged and * osgi *. Jar (main osgi package) is located.

Question about how to place log4j. properties during osgi Development
A. log4j. osgi-1.2.15-SNAPSHOT.jar. (Spring2.5.1 + spring dm1.0.2) and load this bundle when starting the system
B. Configure parameters (more user-friendly)
Set in startup parameters (in eclipse or packaged run. BAT)
Java-dorg. osgi. Service. http. Port = 8096-jar osgi3.2.1.jar-configuration-dlog4j. Configuration = file: config/log4j. properties-Console
Note:
-Dorg. osgi. Service. http. Port: the jetty port is used when the system starts.
-Jar: osgi MAIN package address
-Configuration: Use the config. ini file in the specified directory as the system startup configuration.
-Dlog4j. Configuration: the address of the log4j log configuration file, which can be a relative path. For example, the above indicates that the log4j configuration file is placed in the config under the main () package directory.
-Console: Start the system on the console.