I have an XML configuration file with multiple appenders. Each of the
appender has a variable associated with it.
I realize that all the variables have to be set before calling the
DOMConfigurator. Without initializing all the variables, I get the following
error.
log4j:ERROR setFile(null,false) call failed.
java.io.FileNotFoundException: (No such file or directory)
at java.io.FileOutputStream.open(Native Method)
at java.io.FileOutputStream.<init>(FileOutputStream.java:179)
at java.io.FileOutputStream.<init>(FileOutputStream.java:102)
at org.apache.log4j.FileAppender.setFile(FileAppender.java:272)
at
org.apache.log4j.FileAppender.activateOptions(FileAppender.java:151)
at
org.apache.log4j.config.PropertySetter.activate(PropertySetter.java:247)
at
org.apache.log4j.xml.DOMConfigurator.parseAppender(DOMConfigurator.java:210)
at
org.apache.log4j.xml.DOMConfigurator.findAppenderByName(DOMConfigurator.java
:140)
at
org.apache.log4j.xml.DOMConfigurator.findAppenderByReference(DOMConfigurator
.java:153)
at
org.apache.log4j.xml.DOMConfigurator.parseChildrenOfLoggerElement(DOMConfigu
rator.java:415)
at
org.apache.log4j.xml.DOMConfigurator.parseCategory(DOMConfigurator.java:335)
at
org.apache.log4j.xml.DOMConfigurator.parse(DOMConfigurator.java:788)
at
org.apache.log4j.xml.DOMConfigurator.doConfigure(DOMConfigurator.java:673)
at
org.apache.log4j.xml.DOMConfigurator.doConfigure(DOMConfigurator.java:616)
at
org.apache.log4j.xml.DOMConfigurator.doConfigure(DOMConfigurator.java:584)
at
org.apache.log4j.xml.DOMConfigurator.configure(DOMConfigurator.java:694)
at
com.chordiant.taskeng.server.core.TaskLogger.init(TaskLogger.java:44)
at
com.chordiant.taskeng.server.core.TaskLogger.main(TaskLogger.java:135)
This is not viable in my case, since, different programs use the same
configuration file to dynamically set the file name at *different* times.
For eg, when prg1 initializes and starts logging, appender_01 variable is
set and since prg 2 which uses appender_02 has not yet started the variable
2 is not yet initialized.
What's a way around this issue using a single configuration file?
<log4j:configuration xmlns:log4j="http://jakarta.apache.org/log4j/";>
<appender name="appender_01" class="org.apache.log4j.FileAppender">
<param name="File" value="${TaskServer.log}"/>
<param name="Append" value="false"/>
<layout class="org.apache.log4j.PatternLayout">
<param name="ConversionPattern" value="[%p] %r %C %d{ISO8601} %l %m
%n"/>
</layout>
</appender>
<appender name="="appender_02" class="org.apache.log4j.FileAppender">
<param name="File" value="${TaskServerHelper.log}"/>
<param name="Append" value="false"/>
<layout class="org.apache.log4j.PatternLayout">
<param name="ConversionPattern" value="[%p] %r %C %d{ISO8601} %l %m
%n"/>
</layout>
</appender>
<logger name="logger1">
<appender-ref ref=" appender_01"/>
</logger>
<logger name="logger2">
<appender-ref ref=" appender_02"/>
</logger>
</log4j:configuration>
Thanks,
Deepa.
