log4j: layout demo : Log4j « Language Basics « Java
- Java
- Language Basics
- Log4j
log4j: layout demo
/*
Logging In Java with the JDK 1.4 Logging API and Apache log4j
by Samudra Gupta
Apress Copyright 2003
ISBN:1590590996
*/
import org.apache.log4j.Logger;
import org.apache.log4j.ConsoleAppender;
import org.apache.log4j.TTCCLayout;
import org.apache.log4j.NDC;
public class LayoutDemo {
private static Logger logger = Logger.getLogger("name");
private ConsoleAppender appender = null;
private TTCCLayout layout = null;
/** Creates a new instance of LayoutDemo */
public LayoutDemo() {
//set the parent additivity to false
logger.setAdditivity(false);
//initialize the layout
layout = new TTCCLayout("yyyy-MM-dd");
//initialize the console appender with the layout
appender = new ConsoleAppender(layout, "System.out");
//adding the console appender to the logger
logger.addAppender(appender);
}
public void computeSquareRoot(double number) {
NDC.push(new Double(number).toString());
double sqrt = Math.sqrt(number);
logger.info("The sqrt value: " + sqrt);
NDC.pop();
}
public static void main(String args[]) {
LayoutDemo demo = new LayoutDemo();
demo.computeSquareRoot(22);
demo.computeSquareRoot(44);
}
}
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