package org.apache.log4j.multiplex;
import org.apache.log4j.Appender;
import org.apache.log4j.AppenderSkeleton;
import org.apache.log4j.spi.LoggingEvent;
/**
*
* TODO discuss how the Selector and AppenderFactory works
*
*
* @author psmith
*
*/
public class MultiplexAppender extends AppenderSkeleton {
private MultiplexSelector selector;
/*
* (non-Javadoc)
*
* @see org.apache.log4j.spi.OptionHandler#activateOptions()
*/
public void activateOptions() {
// check that we have a selector of something at this point
if (getSelector() == null) {
throw new IllegalStateException(
"Should have had a Selector defined at this point");
}
// TODO work out how the Selector has it's AppenderFactory configured by Joran
}
/*
* (non-Javadoc)
*
* @see org.apache.log4j.Appender#close()
*/
public void close() {
getSelector().close();
}
/**
* @return Returns the selector.
*/
public final MultiplexSelector getSelector() {
return selector;
}
/*
* (non-Javadoc)
*
* @see org.apache.log4j.Appender#requiresLayout()
*/
public boolean requiresLayout() {
// TODO check this is correct
return true;
}
/**
* @param selector
* The selector to set.
*/
public final void setSelector(MultiplexSelector selector) {
this.selector = selector;
}
/*
* (non-Javadoc)
*
* @see org.apache.log4j.WriterAppender#subAppend(org.apache.log4j.spi.LoggingEvent)
*/
protected void append(LoggingEvent event) {
// we assume appropriate syncronization has occured on this appender
// determinge the key to lookup the Appender to use
Appender appender = getSelector().select(event);
appender.doAppend(event);
}
}