JethroXT skrev den 27-07-2008 19:16:
Hi,
I have a problem that maybe someone could solve:
I have a network consisting of several nodes that all have to log data
independently.
I don't know the exact number of nodes before runtime, so Loggers (or
appenders) have
to be created at runtime.
Is this at program start time or dynamically changing while running?
If it is at program start time you can set a system property which can
then be expanded in the log4j.properties file. From
PropertyConfigurator javadoc
"All option /values/ admit variable substitution. The syntax of variable
substitution is similar to that of Unix shells. The string between an
opening *"${"* and closing *"}"* is interpreted as a key. The value of
the substituted variable can be defined as a system property or in the
configuration file itself. The value of the key is first searched in the
system properties, and if not found there, it is then searched in the
configuration file being parsed. The corresponding value replaces the
${variableName} sequence. For example, if |java.home| system property is
set to |/home/xyz|, then every occurrence of the sequence |${java.home}|
will be interpreted as |/home/xyz|. "
Is this what you need?
--
Thorbjørn
