Hi,
After my previous posts concerning Java: Log4j Concepts and Explanations and Java: Log4j in practice, I would expose a solution to overwrite the file path on runtime.
Libraries needed : commons-lang3-3.1.jar, commons-logging-1.1.1.jar and log4j-1.2.15.jar.
MainApp.java
Config.properties
BUSINESS_LOG_FILE=D\:\\...\\... \\data\\results\\InjectorBusiness.log
TECHNICAL_LOG_FILE=D\:\\...\\...\\data\\results\\InjectorTechnical.log
LogUtil.java
log4jInjector.properties
log4j.rootCategory=ALL,CONSOLE,TECHNICALLOGFILE
log4j.logger.com.ho.log4j.test2.LogUtil=INFO,BUSINESSLOGFILE
#------------------- CONSOLE --------------------------
log4j.appender.CONSOLE=org.apache.log4j.ConsoleAppender
log4j.appender.CONSOLE.layout=org.apache.log4j.PatternLayout
log4j.appender.CONSOLE.layout.ConversionPattern= %m%n
log4j.appender.CONSOLE.Threshold=INFO
#------------------- FILE --------------------------
log4j.appender.TECHNICALLOGFILE=org.apache.log4j.RollingFileAppender
log4j.appender.TECHNICALLOGFILE.File=injectortech.log
log4j.appender.TECHNICALLOGFILE.MaxFileSize=30MB
log4j.appender.TECHNICALLOGFILE.layout=org.apache.log4j.PatternLayout
log4j.appender.TECHNICALLOGFILE.layout.ConversionPattern=%d{ABSOLUTE} %5p %c - %m%n
log4j.appender.TECHNICALLOGFILE.Threshold=ALL
#------------------- BUSINESSLOGFILE --------------------------
log4j.appender.BUSINESSLOGFILE=org.apache.log4j.DailyRollingFileAppender
#log4j.appender.BUSINESSLOGFILE.File=${catalina.base}/logs/Injector.log
log4j.appender.BUSINESSLOGFILE.File=injector.log
log4j.appender.BUSINESSLOGFILE.DatePattern='.'yyy-MM-dd-HH
log4j.appender.BUSINESSLOGFILE.MaxFileSize=30MB
log4j.appender.BUSINESSLOGFILE.layout=org.apache.log4j.PatternLayout
log4j.appender.BUSINESSLOGFILE.Threshold=ALL
log4j.appender.BUSINESSLOGFILE.Append=true
log4j.appender.BUSINESSLOGFILE.layout.ConversionPattern=%-d{MMM dd HH:mm:ss} %-5p %c %M %m%n
Execute the MainApp class with the following program
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