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Visualizing DIET and JuxMem

Visualizing DIET and JuxMem. Mathieu Jan PARIS Research Group IRISA INRIA & ENS Cachan / Brittany Extension Rennes. Lyon, July 2004. Logging for Java: log4j. Rich and generic tool for logging events Hierarchical loggers Different levels: debug, info, warn, fatal, etc How to use Log4j:

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Visualizing DIET and JuxMem

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  1. Visualizing DIET and JuxMem Mathieu Jan PARIS Research Group IRISA INRIA & ENS Cachan / Brittany Extension Rennes Lyon, July 2004

  2. Logging for Java: log4j • Rich and generic tool for logging events • Hierarchical loggers • Different levels: debug, info, warn, fatal, etc • How to use Log4j: • If (LOG.isDebugEnabled()) LOG.debug(“Ca va planter !!!!! :-)”); • Several appenders: • Text, XML, HTML files • Socket • Mail • Other bindings: C/C++, PHP, C#, etc

  3. Log4j in JuxMem • JuxMem uses Log4j • JXTA uses Log4j • Configured to generate a log.jxta and log.juxmem file on each peer • JDF collects log files • Configuration file: log4j.properties log4j.rootCategory=FATAL, jxta log4j.category.juxmem=DEBUG, juxmem log4j.category.net.jxta.impl.document=FATAL log4j.appender.jxta=org.apache.log4j.FileAppender log4j.appender.jxta.File=log.jxta log4j.appender.jxta.append=false log4j.appender.jxta.layout=org.apache.log4j.PatternLayout log4j.appender.jxta.layout.ConversionPattern=%d %p <-%l-> \n %m%n

  4. JuxMemView • Ongoing work from Chester Tse (MIT) • Based on OpenJGraph and log4j • Goal: • Dynamically visualize JuxMem peers • Get informations about each peer • Rlogin on the peer to modify its behavior • JDF and JXTA shells • Current status • Get Logging events from a file thanks to Log4j • Display the topology of JuxMem • After an execution

  5. Dynamic visualization using Log4j • Minor modifications • Appender: File -> Socket log4j.appender.jxta=org.apache.log4j.net.SocketAppender log4j.appender.jxta.remoteHost=131.254.202.77 log4j.appender.jxta.port=9700 • The same API is used • LoggingEvent • Sample files given to Chester Tse are made from a real execution

  6. Visualizing DIET and JuxMem • 2 different formats are used • Log4j • DIET • Common format? • DIET should be able to read log4j files? • Simple way: 2 different graphs • A SeD is a JuxMem client • Mapping can be done?

  7. Conclusion • JuxMemView • Display JuxMem topology • Launching peers via JDF • Remote control via JXTAshell • Based on log4j and OpenJGraph • Common visualization tool • Not a priority • Not clear how to do it • Ideas?

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