SerivceMix: Configuring Sift Appender with a Rolling Log File
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Join For FreeI have come across several issues where people were having trouble
configuring the Sift file appender in ServiceMix to enable per bundle
logging. Specifically, issues arose when trying to configure a rolling
log file appender for sift. This is rather simple and straight forward
as you will see in the configuration below. You simply need to use the org.apache.log4j.RollingFileAppender
as you would for any log4j appender. The important part is ensuring
the proper configuration when applying the rolling log file appender to
sift.
Lets have a look at the org.ops4j.pax.logging.cfg of the latest distribution of Fuse ESB, which is currently 4.4.1-fuse-03-06. The Sift appender comes configured as follows:
# Sift appender log4j.appender.sift=org.apache.log4j.sift.MDCSiftingAppender log4j.appender.sift.key=bundle.name log4j.appender.sift.default=servicemix log4j.appender.sift.appender=org.apache.log4j.FileAppender log4j.appender.sift.appender.layout=org.apache.log4j.PatternLayout log4j.appender.sift.appender.layout.ConversionPattern=%d{ABSOLUTE} | %-5.5p | %-16.16t | %-32.32c{1} | %m%n log4j.appender.sift.appender.file=${karaf.data}/log/$\\{bundle.name\\}.log log4j.appender.sift.appender.append=true
To enable a rolling log file we need to change:
log4j.appender.sift.appender=org.apache.log4j.FileAppender
to:
log4j.appender.sift.appender=org.apache.log4j.RollingFileAppender
Then we need to add the following properties to enable the rolling log:
log4j.appender.sift.appender.maxFileSize=10MB log4j.appender.sift.appender.maxBackupIndex=10
Of course you would configure these properties as required by your application.
Now the Sift appender configured for rolling log files should look as follows:
# Sift appender log4j.appender.sift=org.apache.log4j.sift.MDCSiftingAppender log4j.appender.sift.key=bundle.name log4j.appender.sift.default=servicemix log4j.appender.sift.appender=org.apache.log4j.RollingFileAppender log4j.appender.sift.appender.layout=org.apache.log4j.PatternLayout log4j.appender.sift.appender.layout.ConversionPattern=%d{ABSOLUTE} | %-5.5p | %-16.16t | %-32.32c{1} | %m%n log4j.appender.sift.appender.file=${karaf.data}/log/$\\{bundle.name\\}.log log4j.appender.sift.appender.append=true log4j.appender.sift.appender.maxFileSize=10MB log4j.appender.sift.appender.maxBackupIndex=10
That's all there is to it. You now have a Sift appender configured for
rolling log files. Just remember you also need to have the rootLogger
configured as follows to ensure the sift appender is activated.
Note: This is found at the top of the org.ops4j.pax.logging.cfg file.
log4j.rootLogger=INFO, sift, osgi:VmLogAppender
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