How do I setup log4j properties so that each thread outputs to its own log file?

Question

I have multiple instances of a thread class running at any given time. I have log4j setup to be used for logging needs.

I need a way to setup log4j so that every ins

Answer 1

set up your log4j.properties file like this: suppose that you have 2 thread callded ThreadCheckEsportazioni and ThreadAllineaCodiciTrasportoBDN

# imposta a debug il livello del logger di root e lo chiama debug e debugFile
log4j.rootLogger=DEBUG

#logger debug
log4j.logger.it.consorziometis.sispc.exportbdn.job.ThreadAllineaCodiciTrasportoBDN=DEBUG, ThreadAllineaCodiciTrasportoBDN
log4j.logger.it.consorziometis.sispc.exportbdn.job.ThreadCheckEsportazioni=DEBUG, ThreadCheckEsportazioni

# Associa i tipi agli appendere
#log4j.appender.debug=org.apache.log4j.ConsoleAppender
log4j.appender.ThreadCheckEsportazioni=org.apache.log4j.RollingFileAppender
log4j.appender.ThreadAllineaCodiciTrasportoBDN=org.apache.log4j.RollingFileAppender

# Associa un PatternLayout al exportBdn.
log4j.appender.ThreadCheckEsportazioni.layout=org.apache.log4j.PatternLayout
log4j.appender.ThreadCheckEsportazioni.layout.ConversionPattern=[%d][%5p][%c]-> %m%n
log4j.appender.ThreadCheckEsportazioni.File=/apps/consorziometis/procedure_automatiche/ExportBDNService/logs/exportBDN.log
log4j.appender.ThreadCheckEsportazioni.MaxFileSize=10MB
log4j.appender.ThreadCheckEsportazioni.MaxBackupIndex=10
log4j.appender.ThreadCheckEsportazioni.append=true

# Associa un PatternLayout al allineaCodiciTrasporto.
log4j.appender.ThreadAllineaCodiciTrasportoBDN.layout=org.apache.log4j.PatternLayout
log4j.appender.ThreadAllineaCodiciTrasportoBDN.layout.ConversionPattern=[%d][%5p][%c]-> %m%n
log4j.appender.ThreadAllineaCodiciTrasportoBDN.File=/apps/consorziometis/procedure_automatiche/ExportBDNService/logs/allineaCodiciTrasporto.log
log4j.appender.ThreadAllineaCodiciTrasportoBDN.MaxFileSize=10MB
log4j.appender.ThreadAllineaCodiciTrasportoBDN.MaxBackupIndex=10
log4j.appender.ThreadAllineaCodiciTrasportoBDN.append=true

in each thread you must set:

private static Logger log = Logger.getLogger(ThreadCheckEsportazioni.class);

for ThreadCheckEsportazioni and

private static Logger log = Logger.getLogger(ThreadAllineaCodiciTrasportoBDN.class);

for thread ThreadAllineaCodiciTrasportoBDN

Answer 2

It's not outputting anything to the files because the correct syntax for setting up a logger is:

prop.setProperty("log4j.logger.doSomething"+id,"DEBUG, WORKLOG");